rotating electrical machines

Abstract

To provide a rotary electric machine that can increase the accuracy of detecting a coil temperature while increasing a cooling effect.SOLUTION: A motor device 60 has a motor housing 70, a stator coil 211, and a temperature sensor 431. The motor housing 70 contains the stator coil 211 and the temperature sensor 431. The motor housing 70 has a motor fin 72 in an outer peripheral surface 70a of the motor. The motor fin 72 is provided outside the stator coil 211 in a radial direction. A temperature sensor 431 is provided inside the stator coil 211 in a radial direction. In the motor device 60, heat discharge to the outside of the stator coil 211 in a radial direction is promoted by a motor fin 72 so that heat discharge from the stator coil 211 to the outside in a radial direction is larger than heat discharge from the stator coil 211 to the inside in a radial direction.SELECTED DRAWING: Figure 84

Description

[Technical Field]

[0001] The disclosure in this specification relates to rotating electrical machines. [Background technology]

[0002] Patent Document 1 describes a motor equipped with a temperature sensor. In this motor, a stator and a rotor are housed in a housing. The housing also houses a temperature sensor. The temperature sensor is provided on the outer periphery of the stator coil. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6943317 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the housing is considered to function as a heat dissipation section that releases heat from the coil to the outside. When the housing functions as a heat dissipation section, the temperature of the housing tends to be lower than the temperature of the coil. In Patent Document 1, the temperature sensor detects the temperature between the housing that functions as a heat dissipation section and the coil, so the temperature detected by the temperature sensor tends to be lower than the actual temperature of the coil. From the perspective of the temperature sensor detecting the temperature of the coil, there is a concern that the detection accuracy of the temperature sensor will decrease.

[0005] A main object of the present disclosure is to provide a rotating electric machine that can improve the cooling effect and the detection accuracy of the coil temperature. [Means for solving the problem]

[0006] The multiple aspects disclosed in this specification employ different technical means to achieve their respective objectives. Furthermore, the reference symbols in parentheses in the claims and this section are merely examples showing the correspondence between specific means described in the embodiments below as one aspect, and do not limit the technical scope.

[0007] In order to achieve the above object, the disclosed embodiment comprises: A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a coil (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric machine housing (70) containing a stator and a rotor; A heat dissipation promoting portion (72, 551, 561, 57) is provided on one of the inside and outside of the coil in the radial direction (RD) of the rotation axis, and promotes heat dissipation from the coil to one side so that heat dissipation from the coil to one side is greater than heat dissipation to the other side. 1) and, a temperature detection unit (431, 431A, 431B, 431C, 431D) accommodated in the electric housing, provided on the opposite side of the heat dissipation promotion unit in the radial direction via the coil, and configured to detect an internal temperature of the electric housing; a heat dissipation promoting portion (72, 561) provided at a position facing an outer peripheral surface (211c) of the coil on the outer peripheral side of the coil; As a temperature detection unit, opposing detection units (431A, 431B, 431C) are provided at positions facing the inner circumferential surface (211d) of the coil on the inner circumferential side of the coil; It is a rotating electric machine equipped with the above. The disclosed aspects include: A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a coil (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric machine housing (70) containing a stator and a rotor; a heat dissipation promoting portion (72, 551, 561, 571) provided on one of the inside and outside of the coil in the radial direction (RD) of the rotation axis, which promotes heat dissipation from the coil to one side so that heat dissipation from the coil to one side is greater than heat dissipation to the other side; a temperature detection unit (431, 431A, 431B, 431C, 431D) accommodated in the electric housing, provided on the opposite side of the heat dissipation promotion unit in the radial direction via the coil, and configured to detect an internal temperature of the electric housing; a coil body (900) having a wound coil wire (220) arranged in a circumferential direction (CD) of the rotation axis so that the coil wire forms a coil; temperature communication lines (436, 436A, 436B) that extend radially through between two circumferentially adjacent coil bodies and are communicatively connected to the temperature detection unit; Equipped with The coil body has a bobbin (240) that supports the coil wire, The bobbin is A pair of bobbin flanges (242) extending in a direction perpendicular to the axial direction and aligned in the axial direction; a bobbin body (241) connecting a pair of bobbin flanges and supporting a coil wire wound between the pair of bobbin flanges; It has The temperature communication line is an intruded line (436A) extending radially through a position intruded between a pair of bobbin flanges in one of two circumferentially adjacent coil bodies, in a rotating electric machine.

[0008] In the above rotating electric machine, the heat dissipation promotion portion is provided on either the radially inner side or the radially outer side of the coil. Therefore, the heat dissipation promotion portion can provide a cooling effect to the rotating electric machine from one radial side. Moreover, the temperature detection portion is provided on the opposite side of the coil from the heat dissipation promotion portion. In this configuration, the cooling effect of the heat dissipation promotion portion is unlikely to cause the detected temperature of the temperature detection portion to be lower than the actual coil temperature. In other words, a difference is unlikely to occur between the detected temperature of the temperature detection portion and the actual coil temperature. Therefore, in the rotating electric machine, the cooling effect can be enhanced while the detection accuracy of the coil temperature can be improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing the configuration of a drive system according to a first embodiment. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is a plan view of a motor device in configuration group Aa. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 2 is a plan view of a stator showing the configuration of a coil unit. [Figure 11] FIG. [Figure 12] FIG. 10 is a longitudinal cross-sectional view of the rotor and shaft in the structural group Ab. [Figure 13]FIG. [Figure 14] FIG. 10 is a plan view of the stator and motor housing in the structural group Ac. [Figure 15] FIG. [Figure 16] FIG. 2 is a perspective view of a motor device in a structural group Ad. [Figure 17] FIG. [Figure 18] FIG. 4 is a longitudinal cross-sectional view of the periphery of a relay terminal in the motor device. [Figure 19] FIG. 10 is a plan view of the motor device in the configuration group Ae. [Figure 20] FIG. 10 is a longitudinal cross-sectional view of the periphery of a relay terminal in the motor device in the structural group Af. [Figure 21] FIG. [Figure 22] FIG. 2 is a longitudinal cross-sectional view of a motor device in a structural group Ag. [Figure 23] FIG. [Figure 24] FIG. 2 is a longitudinal cross-sectional view of a rotor and a shaft in a structural group Ba. [Figure 25] FIG. 2 is a plan view of the rotor as seen from the rotor first surface side. [Figure 26] FIG. 3 is a plan view of the rotor as viewed from the rotor second surface side. [Figure 27] FIG. 2 is a diagram showing the arrangement of magnets in a motor. [Figure 28] FIG. 10 is a longitudinal cross-sectional view of the rotor and shaft in the structural group Bb. [Figure 29] FIG. 3 is a longitudinal cross-sectional view of the rotor around the magnet. [Figure 30] FIG. 2 is a perspective view of a longitudinal section of the rotor around a magnet. [Figure 31] FIG. 2 is a plan view of the rotor as seen from the rotor first surface side. [Figure 32] FIG. [Figure 33] FIG. 10 is a perspective view of a longitudinal section of the rotor magnet and its surroundings in structural group Bc. [Figure 34] FIG. 2 is a plan view of a gradient magnet unit and a parallel magnet unit. [Figure 35] FIG. 2 is a plan view of the rotor as seen from the rotor first surface side. [Figure 36] FIG. 10 is a longitudinal cross-sectional view of the rotor and shaft in the structural group Bd. [Figure 37] FIG. 3 is a plan view of the rotor as viewed from the rotor second surface side. [Figure 38] FIG. 2 is a plan view of the rotor as seen from the rotor first surface side. [Figure 39] FIG. [Figure 40] FIG. 2 is a longitudinal cross-sectional view of a rotor and a shaft in a structural group Be. [Figure 41] FIG. 2 is a vertical cross-sectional perspective view of a first rotor and a second rotor. [Figure 42] FIG. 10 is a longitudinal cross-sectional view of the rotor and shaft in the structural group Bf. [Figure 43] FIG. 4 is a diagram for explaining the positional relationship between a first holder fixture and a second holder fixture. [Figure 44] FIG. 2 is a perspective view of the motor as seen from the first rotor side. [Figure 45] Plan view of the shaft. [Figure 46] FIG. 10 is a vertical cross-sectional perspective view of the motor housing and the coil protection portion in the structural group Ca. [Figure 47] FIG. [Figure 48] FIG. 2 is a schematic vertical cross-sectional view of a motor housing and a coil protection portion. [Figure 49] FIG. 4 is a schematic cross-sectional view of a motor housing and a coil protection portion. [Figure 50] FIG. 10 is a perspective view of a vertical cross section of a motor housing in the structural group Cb. [Figure 51] FIG. 10 is a longitudinal cross-sectional view of the periphery of a grommet in the motor device in the structural group Cc. [Figure 52] FIG. 2 is a vertical cross-sectional perspective view of a motor housing and a coil protection portion. [Figure 53] FIG. [Figure 54] FIG. 10 is a perspective view of a core unit in structural group Cd. [Figure 55] FIG. 10 is a perspective view of a core unit in the structural group Ce. [Figure 56] FIG. 2 is a vertical cross-sectional perspective view of a motor housing and a coil protection portion. [Figure 57] FIG. 10 is a perspective view of a core unit in the structural group Cf. [Figure 58] FIG. [Figure 59] Cross section of the core. [Figure 60] FIG. [Figure 61] FIG. 10 is a perspective view of a core unit in the structural group Cg. [Figure 62] FIG. 4 is a perspective view of the core unit as viewed from the flange recess side. [Figure 63] FIG. 10 is a side view of the core unit as seen from the flange recess side. [Figure 64] FIG. 4 is a front view of the core unit as seen from the radially inner side. [Figure 65] FIG. [Figure 66] FIG. 4 is a longitudinal cross-sectional view of a motor device unit in the structural group Da. [Figure 67] FIG. [Figure 68] FIG. 10 is a longitudinal cross-sectional view of a rotor and a stator in a structural group Db. [Figure 69] A perspective view of the shaft from the underside of Figure 68. [Figure 70] Plan view of the shaft from below, Figure 68. [Figure 71] Front view of the shaft. [Figure 72] Cross section taken along line LXXII-LXXII in Figure 71. [Figure 73] FIG. 10 is a longitudinal cross-sectional view of a rotor and a stator in the structural group Dc. [Figure 74] FIG. 3 is a plan view of the rotor as viewed from the rotor second surface side. [Figure 75] FIG. 10 is a plan view of a motor device in a structural group Dd. [Figure 76] FIG. [Figure 77] FIG. 2 is a plan view of a motor device in a configuration group De. [Figure 78] FIG. 10 is a perspective view of a motor device in the structural group Df. [Figure 79]FIG. [Figure 80] FIG. 4 is a plan view of the motor housing as seen from the second rotor side. [Figure 81] FIG. 10 is a perspective view of a motor device in the structural group Dg. [Figure 82] FIG. 4 is a plan view of the motor device as seen from the drive frame side. [Figure 83] FIG. [Figure 84] FIG. 10 is a longitudinal cross-sectional view of the area around a temperature sensor in the motor device in configuration group O. [Figure 85] FIG. 2 is a schematic vertical cross-sectional view of the periphery of a temperature sensor in the motor device. [Figure 86] FIG. 2 is a schematic plan view showing a stator coil and a temperature sensor of the motor device. [Figure 87] FIG. [Figure 88] FIG. 4 is a plan view of the area around a temperature sensor in the motor device. [Figure 89] FIG. 10 is a side view of the core unit showing the location of the temperature signal wiring. [Figure 90] FIG. 10 is a front view of the core unit showing the location of the temperature signal wiring. [Figure 91] FIG. 10 is a perspective view of a configuration group O and a neutral point unit in a third embodiment. [Figure 92] FIG. 10 is a side view of the core unit showing the location of the temperature signal wiring. [Figure 93] FIG. 10 is a front view of the core unit showing the location of the temperature signal wiring. [Figure 94] FIG. 10 is a perspective view of a neutral point unit according to a fourth embodiment. [Figure 95] FIG. 11 is a schematic vertical cross-sectional view of the periphery of a temperature sensor in a motor device according to a fifth embodiment. [Figure 96] FIG. 10 is a front view of the core unit showing the location of the temperature signal wiring. [Figure 97] FIG. 13 is a schematic plan view showing a stator coil and a temperature sensor of a motor device according to a sixth embodiment. [Figure 98] FIG. 13 is a schematic plan view showing a stator coil and a temperature sensor of a motor device according to a seventh embodiment. [Figure 99] FIG. 13 is a schematic plan view showing a stator coil and a temperature sensor of a motor device according to an eighth embodiment. [Figure 100] FIG. 13 is a schematic plan view showing a stator coil and a temperature sensor of a motor device according to a ninth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, several embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment will be assigned the same reference numerals, and duplicate descriptions may be omitted. In each embodiment, when only a part of the configuration is described, other previously described embodiments may be applied to the other parts of the configuration. In addition to combinations of parts that are specifically specified as being combinable in each embodiment, it is also possible to partially combine embodiments even if not specified, as long as there is no particular problem with the combination.

[0011] First Embodiment The drive system 30 shown in Fig. 1 is mounted on a moving object such as a vehicle or an aircraft. Vehicles on which the drive system 30 is mounted include, for example, electric vehicles (EVs), hybrid vehicles (HVs), and fuel cell vehicles. Aircraft include aircraft such as vertical take-off and landing aircraft, rotary wing aircraft, and fixed wing aircraft. An example of a vertical take-off and landing aircraft is the eVTOL. eVTOL is an abbreviation for electric Vertical Take-Off and Landing aircraft.

[0012] The drive system 30 is a system that drives the moving body to move it. If the moving body is a vehicle, the drive system 30 drives the vehicle to run, and if the moving body is an aircraft, the drive system 30 drives the aircraft to fly.

[0013] The drive system 30 has a battery 31 and a motor device unit 50. The battery 31 is electrically connected to the motor device unit 50. The battery 31 is a power supply unit that supplies power to the motor device unit 50 and corresponds to a power supply unit. The battery 31 is a DC voltage source that applies a DC voltage to the motor device unit 50. The battery 31 has a rechargeable secondary battery. Examples of this secondary battery include a lithium ion battery and a nickel-metal hydride battery. Note that a fuel cell, a generator, or the like may be used as the power supply unit in addition to or instead of the battery 31.

[0014] The motor device unit 50 is a device that drives the moving body to move, and corresponds to a drive device. The motor device unit 50 has a motor device 60 and an inverter device 80. The motor device 60 has a motor 61. The inverter device 80 has an inverter 81. The battery 31 is electrically connected to the motor 61 via the inverter 81. Power is supplied to the motor 61 from the battery 31 via the inverter 81. The motor 61 is driven in accordance with the voltage and current supplied from the inverter 81.

[0015] The motor 61 is a multi-phase AC motor. The motor 61 is, for example, a three-phase AC motor, and has a U phase, a V phase, and a W phase. The motor 61 is a driving source for moving the moving body, and functions as an electric motor. For example, a brushless motor is used as the motor 61. The motor 61 functions as a generator during regeneration. The motor 61 corresponds to a rotating electric machine, and the motor device unit 50 corresponds to a rotating electric machine unit.

[0016] The motor 61 has coils 211 of multiple phases. The coils 211 are windings and form an armature. A coil 211 is provided for each of the U phase, V phase, and W phase. In the motor 61, the coils 211 of multiple phases are star-connected. A star connection is sometimes called a Y connection. The motor 61 has a neutral point 65. The coils 211 of multiple phases are connected to each other at the neutral point 65.

[0017] The inverter 81 drives the motor 61 by converting the power supplied to the motor 61. The inverter 81 converts the power supplied to the motor 61 from direct current to alternating current. The inverter 81 is a power conversion unit that converts power. The inverter 81 is a multi-phase power conversion unit that performs power conversion for each of the multiple phases. The inverter 81 is, for example, a three-phase inverter that performs power conversion for each of the U phase, V phase, and W phase.

[0018] The inverter device 80 has a P line 141 and an N line 142. The P line 141 and the N line 142 electrically connect the battery 31 and the inverter 81. The P line 141 is electrically connected to the positive electrode of the battery 31. The N line 142 is electrically connected to the negative electrode of the battery 31. In the battery 31, the positive electrode is the high-potential electrode, and the negative electrode is the low-potential electrode. The P line 141 and the N line 142 are power lines for supplying electric power. The P line 141 is a high-potential power line and may be referred to as a high-potential line. The N line 142 is a low-potential power line and may be referred to as a low-potential line.

[0019] The motor device unit 50 has an output line 143. The output line 143 is a power line for supplying electric power. The output line 143 electrically connects the motor 61 and the inverter 81. The output line 143 is laid across the motor device 60 and the inverter device 80.

[0020] The inverter device 80 has a smoothing capacitor 145. The smoothing capacitor 145 is a capacitor that smoothes the DC voltage supplied from the battery 31. The smoothing capacitor 145 is connected to the P line 141 and the N line 142 between the battery 31 and the inverter 81. The smoothing capacitor 145 is connected in parallel to the inverter 81.

[0021] The inverter 81 is a power conversion circuit, for example, a DC-AC conversion circuit. The inverter 81 has arm circuits 85 for a plurality of phases. For example, the inverter 81 has an arm circuit 85 for each of the U phase, V phase, and W phase. The arm circuits 85 may be referred to as legs or upper and lower arm circuits. The arm circuit 85 has an upper arm 85a and a lower arm 85b. The upper arm 85a and the lower arm 85b are connected in series to the battery 31. The upper arm 85a is connected to the P line 141, and the lower arm 85b is connected to the N line 142.

[0022] The output line 143 is connected to the arm circuit 85 for each of the multiple phases. The output line 143 is connected between the upper arm 85a and the lower arm 85b. The output line 143 connects the arm circuit 85 and the coil 211 for each of the multiple phases. The output line 143 is connected to the side of the coil 211 opposite to the neutral point 65.

[0023] The arms 85a and 85b each have an arm switch 86 and a diode 87. The arm switch 86 is formed of a switching element such as a semiconductor element. Examples of this switching element include power elements such as IGBT and MOSFET. IGBT is an abbreviation for Insulated Gate Bipolar Transistor. MOSFET is an abbreviation for Metal-Oxide-Semiconductor Field-Effect Transistor.

[0024] Each of the arms 85a and 85b has one arm switch 86 and one diode 87. In each of the arms 85a and 85b, the diode 87 is connected in anti-parallel to the arm switch 86 for reflux. In the upper arm 85a, the collector of the arm switch 86 is connected to the P line 141. In the lower arm 85b, the emitter of the arm switch 86 is connected to the N line 142. The emitter of the arm switch 86 in the upper arm 85a and the collector of the arm switch 86 in the lower arm 85b are connected to each other. The anode of the diode 87 is connected to the emitter of the corresponding arm switch 86, and the cathode is connected to the collector. The arm switch 86 can also be called a semiconductor switch.

[0025] The motor device unit 50 has a control device 54. The control device 54 is included in the inverter device 80. The control device 54 is, for example, an ECU, and controls the driving of the inverter 81. ECU is an abbreviation for Electronic Control Unit. The control device 54 is mainly composed of, for example, a microcomputer equipped with a processor, memory, I / O, and buses connecting these. The memory is a non-transitory tangible storage medium that non-temporarily stores computer-readable programs and data. The non-transitory tangible storage medium is also a non-transitory tangible storage medium, and is realized by a semiconductor memory, a magnetic disk, or the like. In FIG. 1, the control device 54 is illustrated as a CD.

[0026] The control device 54 executes various processes related to the driving of the inverter 81 by executing a control program stored in the memory. The control device 54 is electrically connected to an external device, the inverter 81, and various sensors. The external device is, for example, a higher-level ECU such as an integrated ECU mounted on a mobile object. The various sensors are provided, for example, in the motor device unit 50. The control device 54 controls the inverter 81 by outputting a command signal to the inverter 81. The control device 54 generates the command signal in response to a control signal input from the external device, a detection signal input from the various sensors, and the like. In the inverter device 80, the inverter 81 is driven in response to the command signal input from the control device 54, and power conversion is performed by the inverter 81.

[0027] The motor device 60 has a resolver 421 and a temperature sensor 431 as various sensors. The resolver 421 is a rotation sensor that detects the rotation angle of the motor 61, and corresponds to a rotation detection unit. The resolver 421 outputs a detection signal according to the rotation angle of the motor 61. The detection signal of the resolver 421 includes information about the number of rotations, such as the rotation angle, of the motor 61. Note that the motor device 60 may have a rotation detection unit different from the resolver 421.

[0028] The temperature sensor 431 is capable of detecting the temperature of the motor 61 and corresponds to a temperature detection unit. The temperature sensor 431 outputs a detection signal corresponding to the temperature of the motor 61. The temperature sensor 431 detects, for example, the temperature of the stator 200 (described later) as the temperature of the motor 61. The temperature sensor 431 may detect the temperature of any part of the motor 61.

[0029] The resolver 421 and the temperature sensor 431 are electrically connected to the control device 54. The resolver 421 is connected to the control device 54 by a signal line 425. A detection signal output by the resolver 421 is input to the control device 54 via the signal line 425. The temperature sensor 431 is connected to the control device 54 by a signal line 435. A detection signal output by the temperature sensor 431 is input to the control device 54 via the signal line 435. The signal lines 425, 435 are included in the motor device unit 50, and are connected to the motor device 60 and the inverter device 80.

[0030] As shown in Figures 2 and 3, in the motor device unit 50, the motor device 60 and the inverter device 80 are arranged along the motor axis Cm. The motor device 60 and the inverter device 80 are fixed to each other with fasteners such as bolts. The motor axis Cm is a virtual line extending linearly. If the direction in which the motor axis Cm extends is referred to as the axial direction AD, the axial direction AD, the radial direction RD, and the circumferential direction CD are perpendicular to each other with respect to the motor axis Cm. Note that the outside of the radial direction RD is sometimes referred to as the radially outer side, and the inside of the radial direction RD is sometimes referred to as the radially inner side. Note that Figure 3 shows a vertical cross section of the motor device unit 50 extending along the motor axis Cm.

[0031] The motor device 60 has a motor housing 70. The motor housing 70 accommodates the motor 61. The motor housing 70 is formed in a cylindrical shape as a whole and extends along the motor axis Cm. The motor housing 70 is formed from a metal material or the like and has thermal conductivity. The motor housing 70 has an outer peripheral surface 70a. The outer peripheral surface 70a is included in the outer surface of the motor housing 70 and extends annularly in the circumferential direction CD as a whole.

[0032] The motor housing 70 has a housing main body 71 and motor fins 72. The housing main body 71 forms an outer peripheral surface 70a. The motor fins 72 are heat dissipation fins provided on the outer peripheral surface 70a. The motor fins 72 increase the surface area of ​​the motor housing 70, thereby improving the heat dissipation effect of the motor housing 70. The motor fins 72 protrude radially outward from the outer peripheral surface 70a. The motor fins 72 extend in the axial direction AD along the outer peripheral surface 70a. Multiple motor fins 72 are arranged in the circumferential direction CD.

[0033] The inverter device 80 has an inverter housing 90. The inverter housing 90 accommodates the inverter 81. The inverter housing 90 is formed into a cylindrical shape as a whole and extends along the motor axis Cm. The inverter housing 90 is formed from a metal material or the like and has thermal conductivity. The inverter housing 90 has an outer peripheral surface 90a. The outer peripheral surface 90a is included in the outer surface of the inverter housing 90 and extends annularly in the circumferential direction CD.

[0034] The motor device 60 and the inverter device 80 are air-cooled devices. The inverter housing 90 has a housing main body 91 and inverter fins 92. The housing main body 91 forms an outer peripheral surface 90a. The inverter fins 92 are heat dissipation fins provided on the outer peripheral surface 90a. The inverter fins 92 increase the surface area of ​​the inverter housing 90 and enhance the heat dissipation effect of the inverter housing 90. The inverter fins 92 protrude radially outward from the outer peripheral surface 90a. The inverter fins 92 extend in the axial direction AD along the outer peripheral surface 90a. Multiple inverter fins 92 are arranged in the circumferential direction CD.

[0035] As shown in FIG. 2, the motor device unit 50 has a unit duct 100. The unit duct 100 is made of a resin material or the like. The unit duct 100 houses the motor housing 70 and the inverter housing 90. The unit duct 100 is formed into a cylindrical shape as a whole and extends along the motor axis Cm. The unit duct 100 spans between the motor housing 70 and the inverter housing 90 in the axial direction AD. The unit duct 100 covers the motor housing 70 and the inverter housing 90 from their outer peripheries. The unit duct 100 is fixed to at least one of the motor housing 70 and the inverter housing 90. Openings are formed in the unit duct 100 at both ends in the axial direction AD.

[0036] The inner peripheral surface of the unit duct 100 faces the outer peripheral surfaces 70a, 90a via the motor fins 72 and the inverter fins 92. The inner peripheral surface of the unit duct 100 is spaced radially outward from the outer peripheral surfaces 70a, 90a. In the motor device unit 50, a duct flow path is formed between the outer peripheral surfaces 70a, 90a and the inner peripheral surface of the unit duct 100. This duct flow path is open in the axial direction AD through an opening in the unit duct 100. In the motor device unit 50, gas such as air passes through the duct flow path, which makes it easier for heat to be released from the motor fins 72 and the inverter fins 92.

[0037] The inner peripheral surface of the unit duct 100 is close to or in contact with the tip surfaces of the motor fins 72 and the inverter fins 92. In this configuration, gas passing through the duct flow path in the axial direction AD tends to pass through positions that overlap the motor fins 72 and the inverter fins 92 in the radial direction RD. This tends to improve the heat dissipation effect of the motor fins 72 and the inverter fins 92.

[0038] As shown in Fig. 3, the inverter device 80 has an inverter lid 99 in addition to an inverter housing 90. The inverter lid 99 is made of a metal material or the like and has thermal conductivity. The inverter lid 99 extends in a direction perpendicular to the motor axis Cm. An opening formed on one end of the inverter housing 90 in the axial direction AD is covered by the inverter lid 99.

[0039] The motor device 60 has a drive frame 390 in addition to the motor housing 70. The drive frame 390 is made of a metal material or the like and has thermal conductivity. The drive frame 390 extends in a direction perpendicular to the motor axis Cm. An opening formed on one end of the motor housing 70 in the axial direction AD is covered by the drive frame 390. The drive frame 390 is fixed to the motor housing 70 by a frame fixture 405. The frame fixture 405 is a fixture such as a bolt. The frame fixture 405 is screwed to the drive frame 390 and the motor housing 70 via a washer 406.

[0040] The motor device 60 has an O-ring 401. The O-ring 401 is an elastically deformable sealing member made of a resin material or the like. The O-ring 401 is sandwiched between the motor housing 70 and the drive frame 390. The O-ring 401 extends along the outer periphery of the motor housing 70. The O-ring 401 provides a seal between the motor housing 70 and the drive frame 390.

[0041] In the motor device unit 50, one end in the axial direction AD is formed by the inverter cover part 99. The other end in the axial direction AD is formed by the drive frame 390.

[0042] The motor device unit 50 has a unit housing 51. The unit housing 51 is configured to include an inverter housing 90, an inverter lid portion 99, a motor housing 70, and a drive frame 390. The outer peripheral surface of the unit housing 51 is formed by the inverter housing 90 and the motor housing 70. One of a pair of end faces of the unit housing 51 is formed by the inverter lid portion 99, and the other is formed by the drive frame 390. The unit duct 100 covers the outer peripheral surface of the unit housing 51.

[0043] As shown in Figures 3 and 4, the motor 61 has a stator 200, a rotor 300, and a shaft 340. The rotor 300 rotates relative to the stator 200 around the motor axis Cm. The rotor 300 is a rotor and may be referred to as a rotor sub-assembly. The motor axis Cm is the center line of the rotor 300 and corresponds to the rotation axis. The shaft 340 is fixed to the rotor 300 and rotates together with the rotor 300. The shaft 340 is the rotation axis of the motor 61. The center line of the shaft 340 coincides with the motor axis Cm. The center line of the stator 200 coincides with the motor axis Cm. The stator 200 is a stator and may be referred to as a stator sub-assembly.

[0044] The motor device 60 is an axial gap type rotating electric machine. In the motor 61, a stator 200 and a rotor 300 are arranged in the axial direction AD along the motor axis Cm. The rotor 300 is overlapped with the stator 200 in the axial direction AD, and rotates relative to the stator 200 in this state.

[0045] The motor device 60 is a double-rotor rotating electric machine and has two rotors 300. The two rotors 300 are aligned in the axial direction AD. A stator 200 is provided between the two rotors 300 in the axial direction AD. A shaft 340 is fixed to both of the two rotors 300. The two rotors 300 rotate together with the shaft 340. If the two rotors 300 are referred to as a first rotor 300a and a second rotor 300b, the first rotor 300a is provided on the rear frame 370 side with respect to the stator 200. The second rotor 300b is provided on the opposite side of the stator 200 from the inverter device 80. An axial gap type, double-rotor rotating electric machine is sometimes referred to as a double axial motor.

[0046] As shown in Figs. 3 and 6, the stator 200 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape as a whole. The stator 200 has a coil unit 210 and a coil protection part 250. The coil unit 210 has coil parts 215. A plurality of the coil parts 215 are arranged in the circumferential direction CD. In the coil unit 210, a coil 211 is formed by at least one coil part 215. The coils 211 of multiple phases are arranged in the circumferential direction CD in the coil unit 210. Note that the coil protection part 250 is not shown in Fig. 6.

[0047] The coil protection part 250 is formed from a resin material or the like. The coil protection part 250 is formed from, for example, an epoxy-based thermosetting resin. The coil protection part 250 is, for example, a molded resin formed by molding. The coil protection part 250 has electrical insulation properties. The coil protection part 250 has thermal conductivity, which makes it easy for heat to be transferred from the coil part 215. The coil protection part 250 has a thermal conductivity greater than that of, for example, air.

[0048] The coil protection part 250 covers the coil unit 210 and protects the coil unit 210. The coil protection part 250 extends in the circumferential direction CD around the motor axis Cm. The coil protection part 250 is formed in an annular shape as a whole. The coil protection part 250 seals the coil 211 and the coil part 215. The coil protection part 250 is in contact with both the coil part 215 and the motor housing 70. The coil protection part 250 makes it easier to transfer heat from the coil part 215 to the motor housing 70.

[0049] The rotor 300 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape overall. The rotor 300 is formed in a plate shape overall. The rotor 300 has magnets 310 and a magnet holder 320. A plurality of the magnets 310 are arranged in the circumferential direction CD. The magnets 310 are permanent magnets and form a field magnet. The magnet holder 320 supports the plurality of magnets 310. The magnet holder 320 extends in the circumferential direction CD around the motor axis Cm. The magnet holder 320 is formed in an annular shape overall.

[0050] The shaft 340 has a shaft body 341 and a shaft flange 342. The shaft body 341 is formed in a columnar shape and extends along the motor axis Cm. The shaft flange 342 extends radially outward from the shaft body 341. The shaft flange 342 extends around the motor axis Cm in the circumferential direction CD. The shaft flange 342 is formed in an annular shape as a whole. The shaft flange 342 is fixed to the rotor 300.

[0051] The motor device 60 has a first bearing 360 and a second bearing 361. The bearings 360 and 361 rotatably support the shaft 340. The rotor 300 is rotatably supported by the bearings 360 and 361 via the shaft 340. The first bearing 360 and the second bearing 361 are aligned in the axial direction AD. A shaft flange 342 is provided between the first bearing 360 and the second bearing 361 in the axial direction AD. The first bearing 360 is attached to a rear frame 370 (described later) and fixed to the motor housing 70 via the rear frame 370. The second bearing 361 is attached to a drive frame 390 and fixed to the motor housing 70 via the drive frame 390.

[0052] 3, 4, and 6, the motor device 60 includes a busbar unit 260, a rear frame 370, a dust cover 380, a retainer plate 410, a resolver 421, and a resolver cover 424. Note that the dust cover 380 is not shown in FIG.

[0053] The rear frame 370 is formed in a plate shape overall and extends in a direction perpendicular to the motor axis Cm. The rear frame 370 is formed from a metal material or the like. The rear frame 370 covers the stator 200 and the rotor 300 from the inverter device 80 side. The rear frame 370 separates the internal space of the motor housing 70 from the inverter device 80 side. The rear frame 370 separates the internal space of the motor housing 70 from the internal space of the inverter housing 90. The rear frame 370 is provided between the motor housing 70 and the inverter housing 90 in the axial direction AD. The rear frame 370 is sandwiched between the motor housing 70 and the inverter housing 90.

[0054] The dustproof cover 380 extends in the circumferential direction CD around the motor axis Cm. The dustproof cover 380 is formed in an annular shape as a whole. The dustproof cover 380 is placed on the rear frame 370 from the inverter device 80 side. The dustproof cover 380 is made of a resin material or the like, and has a structure that prevents foreign matter such as dust from passing through. The dustproof cover 380 prevents foreign matter from entering from one of the internal spaces of the motor housing 70 and the inverter housing 90 to the other.

[0055] As shown in Figures 4 and 5, the busbar unit 260 extends in the circumferential direction CD around the motor axis Cm. The busbar unit 260 is formed in an annular shape as a whole. The busbar unit 260 is located away from the stator 200 toward the rear frame 370 in the axial direction AD. The busbar unit 260 is provided closer to the inverter device 80 than the rear frame 370. The busbar unit 260 extends along the plate surface of the rear frame 370.

[0056] As shown in Figures 3 and 6, the bus bar unit 260 has a power bus bar 261 and a bus bar protector 270. The power bus bar 261 is a conductive member such as a bus bar member for passing current. The power bus bar 261 is provided for each of the multiple phases, and forms at least a part of the output line 143 for each of the multiple phases. The power bus bar 261 is provided in the output line 143 between the coil 211 and the inverter 81, and electrically connects the coil 211 and the inverter 81. The power bus bar 261 extends in the circumferential direction CD around the motor axis Cm. The power bus bar 261 is formed in an annular shape as a whole. The bus bar member is a member in which a plate-shaped conductor is covered with an insulator.

[0057] The bus bar protection portion 270 is made of a resin material or the like and has electrical insulation properties. The bus bar protection portion 270 covers the multiple power bus bars 261 and protects the multiple power bus bars 261. The bus bar protection portion 270 extends in the circumferential direction CD around the motor axis Cm. The bus bar protection portion 270 is formed in an annular shape as a whole.

[0058] As shown in Figures 3, 5, and 6, the motor device 60 has a relay terminal 280. The relay terminal 280 is a conductive member such as a bus bar member for passing current. The relay terminal 280 is provided for each of the multiple phases, and forms at least a part of the output line 143 for each of the multiple phases. The relay terminal 280 is provided on the output line 143 between the power bus bar 261 and the inverter 81. The relay terminal 280 electrically connects the power bus bar 261 and the inverter 81. The relay terminal 280 is electrically connected to the power bus bar 261. A plurality of relay terminals 280 are arranged in the circumferential direction CD. The relay terminal 280 is connected to a member that constitutes the inverter 81 in the inverter device 80, for example.

[0059] As shown in Figures 3, 4, and 6, the retainer plate 410 extends in the circumferential direction CD around the motor axis Cm. The retainer plate 410 is formed in an annular shape as a whole. The retainer plate 410 fixes the second bearing 361 to the drive frame 390. The retainer plate 410 is fixed to the drive frame 390 with the second bearing 361 sandwiched between the retainer plate 410 and the drive frame 390.

[0060] The resolver 421 extends in the circumferential direction CD around the motor axis Cm. The resolver 421 is formed in an overall annular shape. The resolver 421 has a resolver rotor and a resolver stator. The resolver rotor rotates relative to the resolver stator. The resolver rotor is provided on the rotor 300 side, and the resolver stator is provided on the motor housing 70 side. For example, the resolver rotor is attached to the shaft 340, and the resolver stator is attached to the rear frame 370. The resolver 421 is provided on the inverter device 80 side of the rear frame 370. The resolver cover 424 is formed in an overall plate shape and extends in a direction perpendicular to the motor axis Cm. The resolver cover 424 covers the resolver 421 from the inverter device 80 side. The resolver cover 424 is attached to the rear frame 370. The resolver cover 424 covers the shaft main body 341 from the inverter device 80 side.

[0061] A reducer 53 is attached to the motor device unit 50. The reducer 53 mechanically connects the motor 61 to an external device. For example, the external device is mechanically connected to the rotating shaft of the motor 61 via the reducer 53. The reducer 53 reduces the rotation of the motor 61 and transmits it to the external device. Examples of external devices include wheels and propellers. The reducer 53 includes multiple gears and is sometimes referred to as a speed change gear and a gearbox. The reducer 53 is structured to match the motor characteristics of the motor 61. The reducer 53 is fixed to the drive frame 390 by a reducer fixture 53a. The reducer fixture 53a is a fixture such as a bolt.

[0062] <Composition group Aa> As shown in Figures 7, 8, and 9, the power bus bar 261 has a bus bar main body 262 and bus bar terminals 263. The bus bar main body 262 extends in the circumferential direction CD around the motor axis Cm. The bus bar main body 262 is formed in an annular shape as a whole. The bus bar main body 262 is formed in a plate shape as a whole and extends in a direction perpendicular to the motor axis Cm. The bus bar terminals 263 extend from the bus bar main body 262 in a direction intersecting the circumferential direction CD. The bus bar terminals 263 extend radially inward from the bus bar main body 262. The bus bar terminals 263 are formed in a plate shape as a whole. Note that the dust cover 380 is not shown in Figure 7.

[0063] The plurality of power bus bars 261 are arranged side by side in the axial direction AD. For example, the plurality of power bus bars 261 include a U-phase power bus bar 261, a V-phase power bus bar 261, and a W-phase power bus bar 261. In the plurality of power bus bars 261, the bus bar bodies 262 are stacked in the axial direction AD. The plurality of bus bar bodies 262 are provided at positions aligned with the stator 200 in the axial direction AD. In the plurality of power bus bars 261, the respective bus bar terminals 263 are positioned spaced apart in the circumferential direction CD.

[0064] The motor device 60 has a stator-side space S1 and an inverter-side space S2. The stator-side space S1 and the inverter-side space S2 are included in the internal space of the motor device 60 and are spaces partitioned by the rear frame 370. The stator-side space S1 and the inverter-side space S2 are aligned in the axial direction AD via the rear frame 370. The stator-side space S1 is a space closer to the stator 200 than the rear frame 370. The stator-side space S1 is a space between the rear frame 370 and the drive frame 390 in the axial direction AD. The inverter-side space S2 is a space closer to the inverter device 80 than the rear frame 370. The inverter-side space S2 is a space between the rear frame 370 and the inverter housing 90 in the axial direction AD. The inverter-side space S2 may include the internal space of the inverter device 80. The stator-side space S1 corresponds to the first space, the inverter-side space S2 corresponds to the second space, and the rear frame 370 corresponds to a space partition.

[0065] The power bus bar 261 is provided in the inverter-side space S2. The bus bar unit 260 is placed on the rear frame 370 from the inverter device 80 side. The bus bar protection part 270 is fixed to the rear frame 370 with fixing devices such as screws.

[0066] As shown in FIG. 8 , the busbar protection portion 270 has a plurality of protective plates 271. The protective plates 271 are made of a resin material or the like and have electrical insulation properties. The protective plates 271 are formed in a plate shape and extend in a direction perpendicular to the axial direction AD. The protective plates 271 extend in the circumferential direction CD around the motor axis Cm. The protective plates 271 are formed in an annular shape as a whole. The multiple protective plates 271 are stacked in the axial direction AD with the busbar main bodies 262 interposed therebetween. The protective plates 271 provide electrical insulation between two busbar main bodies 262 adjacent to each other in the axial direction AD with the protective plates 271 interposed therebetween.

[0067] As shown in FIG. 10 , the motor device 60 has a neutral point bus bar 290. The neutral point bus bar 290 is included in the stator 200. The neutral point bus bar 290 is a conductive member such as a bus bar member for passing current. The neutral point bus bar 290 forms at least the neutral point 65 and electrically connects the coils 211 of multiple phases. The neutral point bus bar 290 extends in the circumferential direction CD around the motor axis Cm. A plurality of neutral point bus bars 290 are arranged in the circumferential direction CD.

[0068] As shown in Fig. 8, the neutral point bus bar 290 is provided at a position spaced apart from the power bus bar 261 in the axial direction AD. The neutral point bus bar 290 is located closer to the drive frame 390 than the rear frame 370 in the axial direction AD. The neutral point bus bar 290 is located on the opposite side of the rear frame 370 from the power bus bar 261 in the axial direction AD. The neutral point bus bar 290 is provided in the stator-side space S1. On the other hand, as described above, the power bus bar 261 is provided in the inverter-side space S2.

[0069] 7 and 10, the neutral point bus bar 290 is provided at a position spaced apart in the radial direction RD from the bus bar main body 262. The neutral point bus bar 290 is located at a position spaced apart from the bus bar main body 262 radially inward.

[0070] As shown in Fig. 10, the coil unit 210 has a neutral point unit 214. A plurality of neutral point units 214 are arranged in the circumferential direction CD. The neutral point unit 214 has a plurality of coil portions 215 and one neutral point bus bar 290. In the neutral point unit 214, the coils 211 of multiple phases are star-connected with a neutral point 65. In the coil unit 210, a plurality of neutral point units 214 are arranged in the circumferential direction CD, and thus a plurality of star-connected coils 211 of multiple phases are arranged in the circumferential direction CD.

[0071] As shown in Fig. 11 , in the neutral point unit 214, the coil portions 215 are arranged in the circumferential direction CD, and thus the coils 211 of the multiple phases are arranged in the circumferential direction CD. In the neutral point unit 214, a power lead-out wire 212 and a neutral lead-out wire 213 extend from the coil 211 for each of the multiple phases. The power lead-out wire 212 is drawn outward in the radial direction from the coil 211 and extends in the axial direction AD toward the power bus bar 261. The power lead-out wire 212 is electrically connected to the power bus bar 261. The neutral lead-out wire 213 is drawn outward in the radial direction from the coil 211. The neutral lead-out wire 213 is electrically connected to the neutral point bus bar 290.

[0072] The coil portion 215 is formed by a wound coil wire 220. The coil wire 220 is a conductive member such as an electric wire for passing an electric current. The coil wire 220 is wound around a core unit 230. In the core unit 230, the coil wire 220 is wound around a core 231 via a bobbin 240. The wound portion of the coil wire 220 forms the coil portion 215, and the portions extending from the coil portion 215 form a first extension wire 216 and a second extension wire 217. In the coil portion 215, the first extension wire 216 extends from one of both ends aligned in the axial direction AD, and the second extension wire 217 extends from the other end.

[0073] The coil wire 220 forms the coil 211 by forming the coil portion 215. In the coil wire 220, the wound portion forms the coil 211, and the portions extending from the coil 211 form the power lead wire 212 and the neutral lead wire 213.

[0074] In each of the multiple phases, one coil 211 is formed by two coil portions 215. In each of the multiple phases, a first extension wire 216 of one of the two coil portions 215 forms a power lead wire 212, and the other first extension wire 216 forms a neutral lead wire 213. The second extension wires 217 of the two coil portions 215 are connected to each other.

[0075] In the neutral point unit 214, the coil 211, the power lead-out 212, and the neutral lead-out 213 are referred to as U-phase, V-phase, and W-phase, respectively. In the neutral point unit 214, the U-phase coils 211U, V-phase coils 211V, and W-phase coils 211W are arranged one by one in the circumferential direction CD. Similarly, the U-phase power lead-out 212U, V-phase power lead-out 212V, and W-phase power lead-out 212W are arranged one by one in the circumferential direction CD. The U-phase neutral lead-out 213U, V-phase neutral lead-out 213V, and W-phase neutral lead-out 213W are arranged one by one in the circumferential direction CD.

[0076] <Constituent group Ab> As shown in Fig. 12, the motor 61 has a first rotor 300a and a second rotor 300b. The motor 61 has a first gap G1 and a second gap G2. The first gap G1 is a gap between the stator 200 and the first rotor 300a. The second gap G2 is a gap between the stator 200 and the second rotor 300b. The first gap G1 and the second gap G2 are aligned in the axial direction AD with the stator 200 interposed therebetween. The motor 61 is sometimes referred to as a double-gap rotating electric machine.

[0077] As shown in FIG. 13 , the coil wire 220 has a conductor portion 221 and a covering portion 222. The conductor portion 221 is conductive and is the portion of the coil wire 220 through which current flows. The covering portion 222 is made of a resin material or the like and is electrically insulating. The covering portion 222 covers the conductor portion 221. The conductor portion 221 has a plurality of strands 223. The strands 223 are made of a conductive material such as copper and are the portion of the conductor portion 221 through which current flows. The coil wire 220 is sometimes called a stranded wire or a split copper wire.

[0078] <Composition group Ac> 14 and 15, in the coil unit 210, the multiple coil portions 215 include first coil portions 215a and second coil portions 215b. The first coil portions 215a and the second coil portions 215b are arranged alternately in the circumferential direction CD. In the coil unit 210, one of two coil portions 215 adjacent to each other in the circumferential direction CD is the first coil portion 215a, and the other is the second coil portion 215b.

[0079] In the coil unit 210, the number of turns of two coil portions 215 adjacent to each other in the circumferential direction CD is different. The number of turns of a coil portion 215 is the number of times that the coil wire 220 is wound around the coil portion 215. The number of turns of the first coil portion 215a is different from that of the second coil portion 215b. For example, the number of turns of the first coil portion 215a is greater than the number of turns of the second coil portion 215b.

[0080] 15, in the first coil portion 215a, both the first extension wire 216 and the second extension wire 217 are drawn out to one side in the radial direction RD. For example, in the first coil portion 215a, both the first extension wire 216 and the second extension wire 217 are drawn out radially inward. On the other hand, in the second coil portion 215b, the first extension wire 216 and the second extension wire 217 are drawn out in opposite directions in the radial direction RD. For example, in the second coil portion 215b, the first extension wire 216 is drawn out radially outward, and the second extension wire 217 is drawn radially inward. Therefore, if the number of turns of the first coil portion 215a is an integer, the number of turns of the second coil portion 215b is approximately 0.5 turns less than the number of turns of the first coil portion 215a.

[0081] <Composition group Ad> 16, 17, and 18, relay terminal 280 and power bus bar 261 are electrically connected. In power bus bar 261, bus bar terminal 263 is connected to relay terminal 280 by a connector such as a screw. The connector is a conductive member for passing current.

[0082] The motor device 60 has a terminal block 285. The terminal block 285 is formed from a resin material or the like and has electrical insulation properties. The terminal block 285 supports the connection portion between the relay terminal 280 and the bus bar terminal 263. For example, a connector is screwed into the terminal block 285, whereby the connection portion between the relay terminal 280 and the bus bar terminal 263 is fixed to the terminal block 285. In other words, the relay terminal 280 and the bus bar terminal 263 are connected by the terminal block 285. The terminal block 285 corresponds to a terminal block. The relay terminal 280 is electrically connected to the inverter 81. The relay terminal 280 is formed from, for example, a bus bar member and corresponds to a relay bus bar.

[0083] As shown in Fig. 18, the terminal base 285 has a base surface 285a. The base surface 285a extends in a direction perpendicular to the motor axis Cm. The relay terminal 280 has a relay connection portion 280a, and the bus bar terminal 263 has a bus bar connection portion 263a. The relay connection portion 280a and the bus bar connection portion 263a are connected by a connector while being placed on the base surface 285a. One of the relay connection portion 280a and the bus bar connection portion 263a is sandwiched between the other and the base surface 285a.

[0084] The relay terminal 280 has a relay extension portion 280b. The relay extension portion 280b extends from the relay terminal 280 toward the inverter device 80. For example, the relay extension portion 280b extends from the relay connection portion 280a in the axial direction AD. The bus bar terminal 263 has a bus bar extension portion 263b. The bus bar extension portion 263b extends from the bus bar terminal 263 toward the bus bar main body 262. For example, the bus bar extension portion 263b has a portion extending in the radial direction RD and a portion extending in the axial direction AD.

[0085] A terminal stand 285 is provided for each of the multiple phases. The terminal stands 285 are lined up in the circumferential direction CD along the bus bar unit 260. For example, the multiple terminal stands 285 include a terminal stand 285 for a U phase, a terminal stand 285 for a V phase, and a terminal stand 285 for a W phase. The terminal stands 285 are provided at positions aligned in the radial direction RD on the bus bar unit 260. The terminal stands 285 are located at a position spaced apart radially inward from the bus bar unit 260.

[0086] <Component group Ae> 19, the multiple relay terminals 280 are arranged at sufficient intervals. The distance between two adjacent relay terminals 280 in the circumferential direction CD is sufficiently large. For example, in a configuration in which three relay terminals 280 are arranged in the circumferential direction CD, the angle between two adjacent relay terminals 280 is approximately 120 degrees.

[0087] In the motor device 60, a plurality of virtual divided regions RE are arranged in the circumferential direction CD. The divided regions RE are regions obtained by dividing the circumference of the motor axis Cm at equal intervals in the circumferential direction CD. The number of divided regions RE is the same as the number of relay terminals 280. For example, if there are three relay terminals 280, there are also three divided regions RE. In this case, the three divided regions RE divide the circumference of the motor axis Cm in the circumferential direction CD at 120 degrees each.

[0088] One relay terminal 280 is arranged in each of the multiple divided regions RE. For example, one relay terminal 280 is arranged in each of three divided regions RE. If the three relay terminals 280 are arranged at 120-degree intervals, one relay terminal 280 will necessarily be arranged in each of the three divided regions RE. Even if the separation angle between the three relay terminals 280 is more or less than 120 degrees, a sufficient separation distance will still be ensured for at least two of the relay terminals 280.

[0089] Similar to the multiple relay terminals 280, the multiple bus bar terminals 263 and the multiple terminal stands 285 are also arranged at sufficient intervals in the circumferential direction CD. For example, when there are three bus bar terminals 263 and three terminal stands 285, one bus bar terminal 263 and one terminal stand 285 are arranged in each of the three divided regions RE.

[0090] <Constituent group Af> 20 and 21, the rear frame 370 supports both the bus bar unit 260 and the first bearing 360. The rear frame 370 has a bus bar support portion 371 and a bearing support portion 372. The rear frame 370 corresponds to the support frame, and the first bearing 360 corresponds to the bearing.

[0091] The bus bar support portion 371 is a portion of the rear frame 370 that supports the bus bar unit 260. The bus bar support portion 371 supports the bus bar protection portion 270, thereby supporting the power bus bar 261. The bus bar support portion 371 includes at least a portion of the rear frame 370 that overlaps with the bus bar unit 260 in the axial direction AD. The bus bar unit 260 is fixed to the bus bar support portion 371 with a fastener such as a bolt. The bus bar support portion 371 extends in the circumferential direction CD around the motor axis Cm. The bus bar support portion 371 is formed in an annular shape as a whole. The bus bar support portion 371 is located at a position spaced radially inward from the outer circumferential edge of the rear frame 370. The bus bar support portion 371 is located at a position spaced radially outward from the inner circumferential edge of the rear frame 370. The bus bar support portion 371 and the bearing support portion 372 are located at a position spaced apart in the radial direction RD.

[0092] The bearing support portion 372 is a portion of the rear frame 370 that supports the first bearing 360. The bearing support portion 372 includes at least a portion of the rear frame 370 that overlaps with the first bearing 360 in the axial direction AD. The bearing support portion 372 extends in the circumferential direction CD around the motor axis Cm. The bearing support portion 372 is formed in an annular shape as a whole. The bearing support portion 372 forms the inner peripheral edge of the rear frame 370.

[0093] The bearing support portion 372 has a support protrusion 372a. The support protrusion 372a protrudes in the axial direction AD from the rear frame 370 toward the drive frame 390. The support protrusion 372a extends in the circumferential direction CD and is formed in an annular shape as a whole. The support protrusion 372a is provided at a position spaced radially outward from the inner peripheral edge of the rear frame 370. The first bearing 360 is fixed to the bearing support portion 372 while fitting inside the support protrusion 372a. The first bearing 360 is fitted into, for example, the inside of the support protrusion 372a. Note that in FIG. 21, the bus bar support portion 371 and the bearing support portion 372 are indicated by dot hatching.

[0094] <Composition group Ag> 22, the resolver 421 is provided in the inverter-side space S2. The resolver 421 is placed on the rear frame 370 from the inverter device 80 side.

[0095] 22 and 23, the resolver 421 is provided with a resolver connector 423. The resolver connector 423 is a connector for electrically connecting the resolver 421 to an external device such as the control device 54. In the resolver connector 423, for example, an electric wire or the like forming a signal line 425 is electrically connected to the resolver 421. The resolver connector 423 protrudes from the resolver 421 in the axial direction AD.

[0096] At least a part of the resolver connector 423 is not covered by the resolver cover 424 and is exposed to the inverter device 80. The resolver cover 424 may be included in the resolver 421.

[0097] As shown in FIG. 22, the neutral point bus bar 290 is located at a position spaced apart from the resolver 421 in the axial direction AD. The neutral point bus bar 290 is located on the opposite side of the resolver 421 in the axial direction AD across the rear frame 370. The neutral point bus bar 290 is provided in the stator side space S1, while the resolver 421 is provided in the inverter side space S2. As shown in FIG. 23, the neutral point bus bar 290 is located at a position spaced apart from the resolver 421 in the radial direction RD. The neutral point bus bar 290 is located at a position spaced apart radially outward from the resolver 421. The rear frame 370 corresponds to the orthogonal frame.

[0098] <Composition group Ba> As shown in Figures 24, 25, and 26, the rotor 300 has a rotor first surface 301 and a rotor second surface 302. The rotor first surface 301 and the rotor second surface 302 extend in a direction perpendicular to the motor axis Cm. The rotor first surface 301 and the rotor second surface 302 extend in the circumferential direction CD around the motor axis Cm and are formed in an annular shape as a whole. In the rotor 300, one of a pair of plate surfaces is the rotor first surface 301, and the other is the rotor second surface 302.

[0099] In the motor device 60, the first rotor 300a and the second rotor 300b are installed with their respective rotor first surfaces 301 facing each other. In the first rotor 300a and the second rotor 300b, their respective rotor second surfaces 302 face in opposite directions. In the first rotor 300a, the rotor second surface 302 faces the rear frame 370.

[0100] 24 and 25, in rotor 300, multiple magnets 310 are arranged along rotor first surface 301. Magnets 310 are exposed on rotor first surface 301 but not on rotor second surface 302. Magnets 310 are covered by magnet holder 320 from the rotor second surface 302 side.

[0101] As shown in Figures 25 and 27, the rotor 300 has a magnet unit 316. The magnet unit 316 has at least one magnet 310. In this embodiment, the magnet unit 316 has a plurality of magnets 310. In the magnet unit 316, the plurality of magnets 310 are arranged in the circumferential direction CD. The magnet unit 316 has, for example, three magnets 310. A plurality of magnet units 316 are arranged in the circumferential direction CD on the rotor 300.

[0102] 27, the rotor 300 has a plurality of magnets 310 including a first circumferential magnet 311a, a second circumferential magnet 311b, a first inner axial magnet 312a, a second inner axial magnet 312b, a first outer axial magnet 313a, and a second outer axial magnet 313b. These circumferential magnets 311a, 311b, inner axial magnets 312a, 312b, and outer axial magnets 313a, 313b are arranged so as to strengthen the magnetic force on the stator 200. Such an arrangement of the magnets 310 is sometimes referred to as a Halbach array. Note that FIG. 27 is a plan view of the arrangement of the magnets 310 when the rotor 300 is viewed from the radial outside.

[0103] The first circumferential magnets 311a and the second circumferential magnets 311b are arranged in multiples in the circumferential direction CD. The first circumferential magnets 311a and the second circumferential magnets 311b are arranged alternately in the circumferential direction CD. The first circumferential magnets 311a and the second circumferential magnets 311b are magnets oriented in opposite directions to each other in the circumferential direction CD. The first circumferential magnet 311a is oriented toward one side of the circumferential direction CD, and the second circumferential magnet 311b is oriented toward the other side of the circumferential direction CD. For example, when a person views the rotor 300 from the opposite side of the stator 200, the first circumferential magnet 311a is oriented clockwise in the circumferential direction CD. The second circumferential magnet 311b is oriented counterclockwise in the circumferential direction CD. In this embodiment, the orientation direction corresponds to the magnetization direction of the magnet 310. The first circumferential magnet 311a and the second circumferential magnet 311b correspond to circumferential magnets.

[0104] The first inner axial magnets 312a and the second inner axial magnets 312b are arranged alternately in the circumferential direction CD. For example, the first inner axial magnets 312a and the second inner axial magnets 312b are arranged alternately one by one in the circumferential direction CD. The first inner axial magnets 312a and the second inner axial magnets 312b are magnets oriented inclined with respect to the motor axis Cm so as to face the stator 200 in the axial direction AD. In the circumferential direction CD, the first inner axial magnets 312a and the second inner axial magnets 312b are oriented in opposite directions to each other. In the circumferential direction CD, the first inner axial magnet 312a is oriented toward the same side as the first circumferential magnet 311a, and the second inner axial magnet 312b is oriented toward the same side as the second circumferential magnet 311b. The first inner axial magnet 312a and the second inner axial magnet 312b correspond to inner axial magnets.

[0105] The multiple magnets 310 include a pair of inner axial magnets 312a, 312b. The pair of inner axial magnets 312a, 312b are adjacent to each other in the circumferential direction CD. If the boundary between the pair of inner axial magnets 312a, 312b is referred to as an inner boundary portion BI, the first inner axial magnet 312a and the second inner axial magnet 312b forming the inner boundary portion BI constitute the pair of inner axial magnets 312a, 312b. The pair of inner axial magnets 312a, 312b are oriented at an angle with respect to the motor axis Cm so as to face the stator 200 in the axial direction AD and to face each other in the circumferential direction CD.

[0106] The first outer-axis magnets 313a and the second outer-axis magnets 313b are arranged alternately in the circumferential direction CD. The first outer-axis magnets 313a and the second outer-axis magnets 313b are arranged alternately one by one in the circumferential direction CD. The first outer-axis magnets 313a and the second outer-axis magnets 313b are magnets oriented at an angle with respect to the motor axis Cm so as to face the opposite side from the stator 200 in the axial direction AD. In the circumferential direction CD, the first outer-axis magnet 313a and the second outer-axis magnet 313b are oriented in opposite directions to each other. In the circumferential direction CD, the first outer-axis magnet 313a is oriented toward the same side as the first circumferential magnet 311a. In the circumferential direction CD, the second outer-axis magnet 313b is oriented toward the same side as the second circumferential magnet 311b. The first outer-axis magnet 313a and the second outer-axis magnet 313b correspond to outer-axis magnets.

[0107] The multiple magnets 310 include a pair of outer-axis magnets 313a, 313b. The pair of outer-axis magnets 313a, 313b are adjacent to each other in the circumferential direction CD. If the boundary between the pair of outer-axis magnets 313a, 313b is referred to as an outer boundary portion BO, the first outer-axis magnet 313a and the second outer-axis magnet 313b forming the outer boundary portion BO constitute the pair of outer-axis magnets 313a, 313b. The pair of outer-axis magnets 313a, 313b are oriented at an angle with respect to the motor axis Cm so as to face away from the stator 200 in the axial direction AD and to face opposite each other in the circumferential direction CD.

[0108] In the circumferential direction CD, a plurality of pairs of inner axial magnets 312a, 312b and a plurality of pairs of outer axial magnets 313a, 313b are arranged. The pairs of inner axial magnets 312a, 312b and the pairs of outer axial magnets 313a, 313b are arranged alternately in pairs in the circumferential direction CD. The pair of inner axial magnets 312a, 312b and the pair of outer axial magnets 313a, 313b are arranged such that the first inner axial magnet 312a and the first outer axial magnet 313a are adjacent to each other in the circumferential direction CD with the first circumferential magnet 311a interposed between them. In other words, the first circumferential magnet 311a is provided between the first inner axial magnet 312a and the first outer axial magnet 313a in the circumferential direction CD. The pair of inner axial magnets 312a, 312b and the pair of outer axial magnets 313a, 313b are arranged such that the second inner axial magnet 312b and the second outer axial magnet 313b are adjacent to each other in the circumferential direction CD with the second circumferential magnet 311b interposed between them. In other words, the second circumferential magnet 311b is provided between the second inner axial magnet 312b and the second outer axial magnet 313b in the circumferential direction CD.

[0109] The magnets 310 include a pair of circumferential magnets 311a and 311b. The pair of circumferential magnets 311a and 311b are adjacent to each other via a pair of inner axial magnets 312a and 312b. The pair of circumferential magnets 311a and 311b are oriented to face each other in the circumferential direction CD.

[0110] The multiple magnet units 316 include first orientation units 319a and second orientation units 319b. Multiple first orientation units 319a and multiple second orientation units 319b are arranged in the circumferential direction CD. The first orientation units 319a and the second orientation units 319b are arranged alternately one by one in the circumferential direction CD. The first orientation units 319a and the second orientation units 319b are oriented in opposite directions as a whole.

[0111] The first alignment unit 319a has one each of a first circumferential magnet 311a, a first inner axial magnet 312a, and a first outer axial magnet 313a. In the first alignment unit 319a, the first circumferential magnet 311a is disposed between the first inner axial magnet 312a and the first outer axial magnet 313a. In the first alignment unit 319a, the first circumferential magnet 311a, the first inner axial magnet 312a, and the first outer axial magnet 313a are fixed to one another and formed into a unit.

[0112] The second alignment unit 319b has one each of a second circumferential magnet 311b, a second inner axial magnet 312b, and a second outer axial magnet 313b. In the second alignment unit 319b, the second circumferential magnet 311b is disposed between the second inner axial magnet 312b and the second outer axial magnet 313b. In the second alignment unit 319b, the second circumferential magnet 311b, the second inner axial magnet 312b, and the second outer axial magnet 313b are fixed to one another and formed into a unit.

[0113] The first rotor 300a and the second rotor 300b are provided point-symmetrically to each other. The first rotor 300a is arranged in a direction rotated 180 degrees relative to the second rotor 300b. The first rotor 300a and the second rotor 300b face each other with their rotor first faces 301 sandwiched between the stator 200. When viewed from the opposite side of the stator 200, the first rotor 300a and the second rotor 300b have the same arrangement order of the circumferential magnets 311a, 311b, the inner axial magnets 312a, 312b, and the outer axial magnets 313a, 313b in the circumferential direction CD.

[0114] In the first rotor 300a and the second rotor 300b, the first circumferential magnets 311a are aligned in the axial direction AD. In the first rotor 300a and the second rotor 300b, a pair of inner axial magnets 312a, 312b of one rotor and a pair of outer axial magnets 313a, 313b of the other rotor are aligned in the axial direction AD. In this configuration, the first inner axial magnet 312a of one rotor and the first outer axial magnet 313a of the other rotor are aligned in the axial direction AD. Furthermore, the second inner axial magnet 312b of one rotor and the second outer axial magnet 313b of the other rotor are aligned in the axial direction AD. Furthermore, the inner boundary portion BI of one rotor and the outer boundary portion BO of the other rotor are aligned in the axial direction AD.

[0115] <Composition group Bb> As shown in Figures 28, 29, and 30, the rotor 300 includes a fixed block 330 and a magnet fixture 335 in addition to the magnet holder 320 and the magnet 310. The magnet fixture 335 is a fixture such as a bolt and is made of a metal material or the like. The magnet fixture 335 fixes the magnet 310 to the magnet holder 320 via the fixed block 330. In the rotor 300, the magnet 310 and the fixed block 330 are provided on the rotor first surface 301 side of the magnet holder 320. The magnet 310 is overlapped on the magnet holder 320 from the rotor first surface 301 side in the axial direction AD. The magnet 310 is sandwiched between the fixed block 330 and the magnet holder 320 in the axial direction AD. The magnet fixture 335 is threadedly attached to the fixed block 330, passing through the magnet holder 320 from the rotor second surface 302 side.

[0116] The magnet holder 320 has a holder main body 321 and an outer peripheral engagement portion 322. The holder main body 321 extends in a direction perpendicular to the motor axis Cm and is formed in a plate shape overall. The holder main body 321 forms the main portion of the magnet holder 320. The holder main body 321 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape overall. The magnet holder 320 has a holder inner peripheral end 320a (see FIG. 31) and a holder outer peripheral end 320b. The holder inner peripheral end 320a is the inner peripheral end of the magnet holder 320, and the holder outer peripheral end 320b is the outer peripheral end of the magnet holder 320. The holder main body 321 forms the holder inner peripheral end 320a and the holder outer peripheral end 320b.

[0117] The outer circumferential engaging portion 322 is a protrusion provided on the holder main body 321, and protrudes from the holder main body 321 toward the rotor first surface 301 in the axial direction AD. The outer circumferential engaging portion 322 is provided on the holder outer circumferential end 320b. The outer circumferential engaging portion 322 has a portion that extends radially inward, with the magnet 310 sandwiched between this portion and the holder main body 321. The outer circumferential engaging portion 322 has an engaging tapered surface 322a. The engaging tapered surface 322a is an inclined surface that is inclined with respect to the motor axis Cm. The engaging tapered surface 322a faces radially inward and is inclined with respect to the motor axis Cm so as to face the holder main body 321. The magnet 310 is inserted between the engaging tapered surface 322a and the holder main body 321 from the radially inner side.

[0118] The fixed block 330 is made of a metal material or the like. The fixed block 330 is provided on the opposite side of the outer circumferential engagement portion 322 with the magnet 310 interposed therebetween in the radial direction RD. The fixed block 330 has a portion that extends radially outward, with the magnet 310 sandwiched between this portion and the holder main body 321. The fixed block 330 has a block tapered surface 330a. The block tapered surface 330a is included in the outer surface of the fixed block 330. The block tapered surface 330a is an inclined surface that is inclined with respect to the motor axis line Cm. The block tapered surface 330a faces radially outward and is inclined with respect to the motor axis line Cm so as to face the holder main body 321. The magnet 310 is inserted between the block tapered surface 330a and the holder main body 321 from the radially outward side.

[0119] The magnet 310 is provided between the outer circumferential engaging portion 322 and the fixed block 330 in the radial direction RD. The magnet 310 is fixed to the holder main body 321 in a state where it is sandwiched between the outer circumferential engaging portion 322 and the fixed block 330 in the radial direction RD.

[0120] As shown in Figure 31, a plurality of fixing blocks 330 and magnet fixing devices 335 are arranged in the circumferential direction CD together with the magnets 310. The fixing blocks 330 are suspended across the plurality of magnets 310 in the circumferential direction CD. The outer circumferential engaging portion 322 extends along the holder outer circumferential end 320b. The outer circumferential engaging portion 322 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape as a whole.

[0121] The fixing block 330 and the magnet fixing tool 335 fix the magnet unit 316 to the magnet holder 320, thereby fixing the magnet 310. A plurality of magnet units 316 are arranged in the circumferential direction CD together with the fixing block 330 and the magnet fixing tool 335.

[0122] As shown in Figure 32, the magnet unit 316 has a unit inner peripheral end 316a, a unit outer peripheral end 316b, and a unit side surface 316c. The unit inner peripheral end 316a is the radially inner end of the magnet unit 316 and extends in the circumferential direction CD. The unit inner peripheral end 316a extends linearly, for example, along a tangent line perpendicular to the radial direction RD. The unit outer peripheral end 316b is the radially outer end of the magnet unit 316 and extends in the circumferential direction CD. The unit outer peripheral end 316b extends curvedly, for example, along an arc so as to bulge radially outward.

[0123] The unit side surfaces 316c are arranged in pairs in the circumferential direction CD in the magnet unit 316. The pair of unit side surfaces 316c extend in the radial direction RD. The unit side surfaces 316c are arranged across the unit inner peripheral end 316a and the unit outer peripheral end 316b in the radial direction RD.

[0124] The magnet unit 316 has an inner peripheral tapered surface 316d and an outer peripheral tapered surface 316e. The inner peripheral tapered surface 316d is inclined in the radial direction RD with respect to the motor axis Cm and extends radially outward from the unit inner peripheral end 316a. The outer peripheral tapered surface 316e is inclined in the radial direction RD with respect to the motor axis Cm and extends radially inward from the unit outer peripheral end 316b.

[0125] In the magnet unit 316, a unit inner peripheral end 316a, a unit outer peripheral end 316b, a unit side surface 316c, an inner peripheral tapered surface 316d, and an outer peripheral tapered surface 316e are formed by at least one magnet 310.

[0126] As shown in Figures 29 and 30, the magnet unit 316 is sandwiched between the fixed block 330 and the magnet holder 320, with the inner peripheral tapered surface 316d overlapping the block tapered surface 330a. The fixed block 330 fixes the magnet unit 316 to the magnet holder 320 by having the block tapered surface 330a press the inner peripheral tapered surface 316d toward the magnet holder 320 in the radial direction RD. Furthermore, the magnet unit 316 is sandwiched between the outer peripheral engaging portion 322 and the holder main body 321, with the outer peripheral tapered surface 316e overlapping the engaging tapered surface 322a. The outer peripheral engaging portion 322 and the fixed block 330 fix the magnet unit 316 to the magnet holder 320 in both the axial direction AD and the radial direction RD.

[0127] The fixed block 330 corresponds to the fixed support portion, the block tapered surface 330a corresponds to the support inclined surface, and the inner peripheral tapered surface 316d corresponds to the magnet inclined surface.

[0128] Next, a method for manufacturing the motor device 60 will be described. The process for manufacturing the motor device 60 includes a process for manufacturing the rotor 300. As a preparation process, an operator prepares the magnet unit 316, the magnet holder 320, the fixing block 330, and the magnet fixing tool 335. Then, the operator inserts the magnet unit 316 from the radially inner side between the holder main body 321 and the outer circumferential engagement portion 322 of the magnet holder 320. After that, the operator fixes the fixing block 330 to the holder main body 321 with the magnet fixing tool 335 so that the magnet unit 316 is sandwiched between the fixing block 330 and the holder main body 321 while overlapping the magnet unit 316 on the holder main body 321. As the operator screws the magnet fixing tool 335 into the holder main body 321, the outer circumferential tapered surface 316e is pressed against the engagement tapered surface 322a, and the block tapered surface 330a is pressed against the inner circumferential tapered surface 316d.

[0129] <Composition group Bc> 33, 34, and 35, the multiple magnet units 316 include inclined magnet units 317 and parallel magnet units 318. The inclined magnet units 317 and parallel magnet units 318 are arranged in multiples in the circumferential direction CD on the rotor 300. The inclined magnet units 317 and the parallel magnet units 318 are arranged alternately one by one in the circumferential direction CD.

[0130] As shown in Fig. 34, in the gradient magnet unit 317, a pair of unit side surfaces 316c are inclined so as to move away from each other radially outward. In the gradient magnet unit 317, the distance between the pair of unit side surfaces 316c gradually increases radially outward. In the gradient magnet unit 317, the unit outer peripheral end 316b is longer than the unit inner peripheral end 316a in the radial direction RD. The gradient magnet unit 317 is formed in an overall trapezoidal or sector shape.

[0131] In the parallel magnet unit 318, a pair of unit side surfaces 316c extend parallel to one another. The pair of unit side surfaces 316c extend in a direction perpendicular to the circumferential direction CD. In the parallel magnet unit 318, the distance between the pair of unit side surfaces 316c is uniform in the radial direction RD. In the parallel magnet unit 318, the unit outer peripheral end 316b and the unit inner peripheral end 316a have approximately the same length in the radial direction RD. The parallel magnet unit 318 is formed into a rectangular shape overall.

[0132] Next, a method for manufacturing the rotor 300 among the methods for manufacturing the motor device 60 will be described. In the process of manufacturing the rotor 300, as described above, an operator fixes the magnet unit 316 to the magnet holder 320 using the fixing block 330 and the magnet fixing tool 335. The operator arranges the inclined magnet units 317 and parallel magnet units 318 as the multiple magnet units 316 in the magnet holder 320 so that they are alternately arranged one by one in the circumferential direction CD. The operator inserts the unit outer circumferential ends 316b of both the inclined magnet units 317 and the parallel magnet units 318 between the outer circumferential engagement portion 322 and the holder main body 321. The operator arranges the parallel magnet unit 318 as the last magnet unit 316 to be arranged in the magnet holder 320. The worker inserts the last parallel magnet unit 318 between the two inclined magnet units 317 adjacent to each other in the circumferential direction CD, and inserts the unit outer circumferential end 316b between the outer circumferential engagement portion 322 and the holder main body 321.

[0133] Each time an operator places a magnet unit 316 in the magnet holder 320, the operator may fix the magnet unit 316 to the magnet holder 320 using the fixing block 330 and the magnet fixing tool 335. Alternatively, the operator may fix all of the magnet units 316 to the magnet holder 320 using the fixing block 330 and the magnet fixing tool 335 after placing all of the magnet units 316 in the magnet holder 320.

[0134] For example, unlike the present embodiment, assume a configuration in which all of the multiple magnet units 316 are inclined magnet units 317. In this configuration, during the manufacturing process of the rotor 300, an operator cannot insert the last inclined magnet unit 317 between two inclined magnet units 317 adjacent to each other in the circumferential direction CD. This is because, radially inward of the outer circumferential engagement portion 322, the separation distance between the two inclined magnet units 317 adjacent to each other in the circumferential direction CD is smaller than the width dimension of the unit outer circumferential end 316b of the last inclined magnet unit 317.

[0135] In contrast to this, in this embodiment, by using the parallel magnet unit 318 as the last magnet unit 316, the operator can insert this parallel magnet unit 318 between two inclined magnet units 317 adjacent to each other in the circumferential direction CD. This is because the separation distance between the two inclined magnet units 317 adjacent to each other in the circumferential direction CD is the same in the region radially inward of the outer circumferential engagement portion 322 and the region inside the outer circumferential engagement portion 322.

[0136] <Composition group Bd> As shown in Figures 36, 37, and 38, the rotor 300 has a holder fixture 350. The holder fixture 350 is a fixture such as a bolt, and is made of a metal material or the like. The holder fixture 350 fixes the magnet holder 320 to the shaft flange 342. A plurality of holder fixtures 350 are arranged in the circumferential direction CD. The holder fixture 350 is screwed into the shaft flange 342, for example, while passing through the magnet holder 320 from the rotor second surface 302 side.

[0137] As shown in Figures 36, 38, and 39, the shaft flange 342 has spokes 343 and a rim 344. The spokes 343 extend radially outward from the shaft main body 341. A plurality of the spokes 343 are arranged in the circumferential direction CD. The rim 344 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape as a whole. The rim 344 is provided at a position spaced radially outward from the shaft main body 341. The rim 344 connects two spokes 343 that are adjacent to each other in the circumferential direction CD. The spokes 343 connect the shaft main body 341 and the rim 344 in the radial direction RD.

[0138] The rim 344 has a pair of rim tips 344a. The rim 344 extends in both axial directions AD from the spokes 343. The pair of rim tips 344a of the rim 344 are aligned in the axial direction AD. The rim tips 344a are located at positions spaced apart from the spokes 343 in the axial direction AD. In the axial direction AD, the height dimension of the rim 344 is greater than the height dimension of the spokes 343.

[0139] As shown in Figures 36, 37, and 38, the rotor 300 is placed on the shaft flange 342 from one side in the axial direction AD. At least the rim tip 344a of the shaft flange 342 is in contact with the rotor 300. Of the parts of the shaft 340 that are in contact with the rotor 300, the rim tip 344a is the radially outermost part. The rim tip 344a is located in a position on the rotor 300 that is spaced radially inward from the magnet 310. The holder fixture 350 is located in a position spaced radially inward from the rim tip 344a. The holder fixture 350 is located on the opposite side of the rim tip 344a from the magnet 310 in the radial direction RD.

[0140] The holder fixture 350 is inserted into the holder fixing hole 325 and the flange fixing hole 345 to fix the magnet holder 320 and the shaft flange 342. The holder fixing hole 325 is provided in the magnet holder 320. The holder fixing hole 325 passes through the magnet holder 320 in the axial direction AD. A plurality of the holder fixing holes 325 are arranged in the circumferential direction CD. The holder fixing holes 325 are located at a position spaced radially inward from the rim 344. The flange fixing holes 345 are provided in the shaft flange 342. The flange fixing holes 345 are provided in, for example, the spokes 343. The flange fixing holes 345 pass through the shaft flange 342 in the axial direction AD. A plurality of the flange fixing holes 345 are arranged in the circumferential direction CD. The flange fixing holes 345 are located at a position spaced radially inward from the rim 344. For example, the holder fixture 350 is threaded through the holder fixing hole 325 into the flange fixing hole 345 .

[0141] 36, in motor device 60, attractive force F1 is generated with respect to rotor 300. The attractive force F1 is a force that attracts magnet 310 toward coil 211 in axial direction AD, and is generated by the magnetic force of magnet 310. The attractive force F1 is a force that tries to bend the peripheral portion of magnet 310 in rotor 300 toward stator 200.

[0142] In the motor device 60, a bending stress F2 that resists the attractive force F1 is generated in the rotor 300. The bending stress F2 is a force that tries to bend the peripheral portion of the magnet 310 in the rotor 300 in the opposite direction to the stator 200. The bending stress F2 is generated when the holder fixture 350 presses the rotor 300 toward the stator 200. The holder fixture 350 applies a pressing force F3 to the rotor 300. The pressing force F3 is a force that presses the rotor 300 toward the stator 200 in the axial direction AD. In the rotor 300, the rim tip 344a serves as a fulcrum for the pressing force F3, thereby generating the bending stress F2. The holder fixture 350 corresponds to the pressing member, and the rim tip 344a corresponds to the fulcrum.

[0143] For example, assume a configuration in which pressing force F3 is not generated by holder fixture 350, unlike this embodiment. In this configuration, there is a concern that the peripheral portion of magnet 310 in rotor 300 approaches stator 200 in the axial direction AD, causing rotor 300 to deform and warp toward stator 200 with rim tip end 344a as the fulcrum. In contrast, in this embodiment, pressing force F3 generated by holder fixture 350 prevents rotor 300 from deforming and warping toward stator 200 with rim tip end 344a as the fulcrum.

[0144] <Constitution group Be> 40 and 41 , holder fixture 350 is fixed to shaft flange 342 at a location radially inward of rim 344. Holder fixture 350 passes through magnet holder 320 and is screwed onto spokes 343 at a position spaced radially inward from rim 344. A rotor gap GR is provided between the location of magnet holder 320 where holder fixture 350 is fixed and the location of spoke 343 where holder fixture 350 is fixed.

[0145] The portion of the magnet holder 320 where the holder fixture 350 is fixed is the holder fixing hole 325 in the magnet holder 320, into which the holder fixture 350 is inserted. The portion of the spokes 343 where the holder fixture 350 is fixed is the flange fixing hole 345 in the spokes 343, into which the holder fixture 350 is inserted. The rotor gap GR is a separation space formed between the rotor 300 and the shaft flange 342 in the axial direction AD. The rotor gap GR is formed between the magnet holder 320 and the spokes 343 in the axial direction AD. Radially inward of the rim 344, the magnet holder 320 and the spokes 343 are spaced apart in the axial direction AD.

[0146] The holder fixture 350 is capable of increasing or decreasing the width dimension of the rotor gap GR in the axial direction AD. As the amount by which the holder fixture 350 is screwed into the spokes 343 increases, the portion of the magnet holder 320 to which the holder fixture 350 is fixed and the portion of the spokes 343 to which the magnet fixture 335 is fixed approach each other, thereby reducing the rotor gap GR. As the amount by which the holder fixture 350 is screwed increases, the pressing force F3 increases, and the bending stress F2 increases. Therefore, by ensuring the rotor gap GR between the shaft flange 342 and the rotor 300, the bending stress F2 that resists the attractive force F1 can be adjusted.

[0147] For example, assume a configuration in which, unlike this embodiment, the portion of magnet holder 320 where holder fixture 350 is fixed and the portion of spoke 343 where holder fixture 350 is fixed are in contact with each other. In this configuration, it is difficult for holder fixture 350 to further deform magnet holder 320, and it is difficult to further increase pressing force F3. For this reason, even if pressing force F3 is insufficient relative to attractive force F1, there is a concern that this insufficiency cannot be resolved. In contrast, in this embodiment, the portion of magnet holder 320 where holder fixture 350 is fixed and the portion of spoke 343 where holder fixture 350 is fixed are spaced apart in the axial direction AD, making it possible to further increase pressing force F3.

[0148] Next, a method of assembling the rotor 300 and the shaft 340 will be described in the manufacturing method of the motor device 60. In the process of attaching the rotor 300 to the shaft 340, a worker inserts the holder fixture 350 into the holder fixing hole 325 and the flange fixing hole 345. When screwing the holder fixture 350, which has been inserted through the holder fixing hole 325, into the flange fixing hole 345, the worker adjusts the amount of screwing of the holder fixture 350 so that the peripheral portion of the magnet 310 in the magnet holder 320 is warped toward the rotor second surface 302. In other words, the worker adjusts the pressing force F3 using the holder fixture 350.

[0149] Thereafter, in the process of attaching stator 200 to rotor 300 and shaft 340, the worker checks that the peripheral portion of magnet 310 in rotor 300 is not warped in the axial direction AD. If the peripheral portion of magnet 310 in rotor 300 is aligned with axial direction AD, the worker adjusts the screw-in amount of holder fixture 350 to eliminate the warping of rotor 300. That is, the worker adjusts pressing force F3 by holder fixture 350 so that bending stress F2 is equal to attractive force F1.

[0150] <Constitution group Bf> As shown in Figures 43, 44, and 45, in the shaft flange 342, the multiple flange fixing holes 345 formed in the spokes 343 include a first flange fixing hole 345a and a second flange fixing hole 345b. If the holder fixing hole 325 formed in the first rotor 300a is referred to as the first holder fixing hole 325a, the first holder fixing hole 325a and the first flange fixing hole 345a are aligned in the axial direction AD. If the holder fixing hole 325 formed in the second rotor 300b is referred to as the second holder fixing hole 325b, the second holder fixing hole 325b and the second flange fixing hole 345b are aligned in the axial direction AD. The first flange fixing holes 345a and the second flange fixing holes 345b are aligned alternately in, for example, the circumferential direction CD.

[0151] 43 is a schematic diagram of the longitudinal section of the motor 61, in which the first rotor 300a, the second rotor 300b, and the shaft flange 342 are viewed from the radially inner side, and the arrangement of the holder fixtures 350 is developed on a plane.

[0152] As shown in Figures 42, 43, and 44, the motor device 60 has a first holder fixture 350a and a second holder fixture 350b as holder fixtures 350. The first holder fixture 350a fixes the first rotor 300a to the shaft flange 342. The first holder fixture 350a is inserted into the first holder fixing hole 325a and the first flange fixing hole 345a. For example, the first holder fixture 350a is threaded through the first holder fixing hole 325a and into the first flange fixing hole 345a. The first holder fixture 350a corresponds to the first fixture. The first holder fixing hole 325a corresponds to the first rotor hole, and the first flange fixing hole 345a corresponds to the first shaft hole.

[0153] The second holder fixture 350b fixes the second rotor 300b to the shaft flange 342. The second holder fixture 350b is inserted into the second holder fixing hole 325b and the second flange fixing hole 345b. The second holder fixture 350b is, for example, passed through the second holder fixing hole 325b and screwed into the second flange fixing hole 345b. The second holder fixture 350b corresponds to the second fixture. The second holder fixing hole 325b corresponds to the second rotor hole, and the second flange fixing hole 345b corresponds to the second shaft hole.

[0154] The first holder fixing hole 325a and the second holder fixing hole 325b are provided at positions spaced apart in the circumferential direction CD. The first flange fixing hole 345a and the second flange fixing hole 345b are positioned at positions spaced apart in the circumferential direction CD in accordance with the positional relationship between the first holder fixing hole 325a and the second holder fixing hole 325b.

[0155] 42 and 43, the motor device 60 has a positioning pin 355. The positioning pin 355 determines the relative positions of the rotor 300 and the shaft 340 in a direction perpendicular to the axial direction AD. The positioning pin 355 prevents the rotor 300 from shifting relative to the shaft 340 in the direction perpendicular to the axial direction AD. For example, the positioning pin 355 prevents the rotor 300 from shifting relative to the shaft 340 in the circumferential direction CD.

[0156] As shown in Figures 42, 43, and 44, the motor device 60 has holder pin holes 327. The holder pin holes 327 are included in the rotor 300. The holder pin holes 327 are provided in the magnet holder 320. The holder pin holes 327 penetrate the magnet holder 320 in the axial direction AD. A plurality of the holder pin holes 327 are aligned in the circumferential direction CD. The holder pin holes 327 are located at a distance radially inward from the rim 344. In the magnet holder 320, the holder fixing holes 325 and the holder pin holes 327 are aligned in the circumferential direction CD.

[0157] The motor device 60 has flange pin holes 348. The flange pin holes 348 are included in the shaft 340. The flange pin holes 348 are provided in the shaft flange 342. The flange pin holes 348 are provided in, for example, the spokes 343. The flange pin holes 348 penetrate the shaft flange 342 in the axial direction AD. A plurality of the flange pin holes 348 are aligned in the circumferential direction CD. The flange pin holes 348 are located at positions spaced radially inward from the rim 344. In the shaft 340, the flange fixing holes 345 and the flange pin holes 348 are aligned in the circumferential direction CD.

[0158] The holder pin hole 327 and the flange pin hole 348 are aligned in the axial direction AD. The positioning pin 355 is inserted into each of the holder pin hole 327 and the flange pin hole 348 while spanning between them in the axial direction AD. The positioning pin 355 is fitted into each of the holder pin hole 327 and the flange pin hole 348. For example, the positioning pin 355 is press-fit into the flange pin hole 348 and clearance-fit into the holder pin hole 327. The positioning pin 355 is configured to prevent play from occurring in the holder pin hole 327 and the flange pin hole 348. The positioning pin 355 is configured to not move relative to the holder pin hole 327 and the flange pin hole 348 in a direction perpendicular to the axial direction AD. For example, the positioning pin 355 is configured to not move relative to the holder pin hole 327 and the flange pin hole 348 in the circumferential direction CD.

[0159] The holder fixture 350 is prone to rattle relative to the holder fixing hole 325 and the flange fixing hole 345. For example, it is conceivable that the holder fixing hole 325 moves relative to the holder fixing hole 325 and the flange fixing hole 345 in the circumferential direction CD. In this case, there is a concern that the rotor 300 and the shaft 340 may become misaligned relative to each other in the circumferential direction CD. However, because rattle does not occur between the positioning pin 355 and the holder pin hole 327 and the flange pin hole 348, the positioning pin 355 suppresses misalignment between the rotor 300 and the shaft 340. The positioning pin 355, the holder pin hole 327, and the flange pin hole 348 are also shown in Figures 37, 38, and 39.

[0160] The holder pin hole 327 formed in the first rotor 300a is referred to as the first holder pin hole 327a, and the holder pin hole 327 formed in the second rotor 300b is referred to as the second holder pin hole 327b. A plurality of positioning pins 355 are included in the motor device 60. The plurality of positioning pins 355 includes a positioning pin 355 that positions the first rotor 300a and the shaft 340. This positioning pin 355 is fitted into the first holder pin hole 327a. The plurality of positioning pins 355 also includes a positioning pin 355 that positions the second rotor 300b and the shaft 340. This positioning pin 355 is fitted into the second holder pin hole 327b.

[0161] The first holder pin hole 327a and the second holder pin hole 327b are aligned in the axial direction AD via the flange pin hole 348. That is, the first holder pin hole 327a and the second holder pin hole 327b are not spaced apart in the circumferential direction CD. The positioning pin 355 fitted in the first holder pin hole 327a and the positioning pin 355 fitted in the second holder pin hole 327b are aligned in the axial direction AD. This makes it less likely that the positioning pin 355 will cause a difference in balance, such as rotational balance, between the first rotor 300a and the second rotor 300b.

[0162] For example, assume a configuration in which the first holder pin holes 327a and the second holder pin holes 327b are offset in the circumferential direction CD, unlike the present embodiment. In this configuration, there is a concern that a difference in balance may occur between the first rotor 300a and the second rotor 300b due to the offset in the circumferential direction CD of the positioning pins 355.

[0163] The shaft flange 342 has a thick flange portion 347. The thick flange portion 347 is a portion that is thicker than other portions of the shaft flange 342. The thick flange portion 347 protrudes from the spokes 343 on both one side and the other side in the axial direction AD.

[0164] The flange pin holes 348 are provided in the flange thick portion 347 of the shaft flange 342. The flange pin holes 348 penetrate the flange thick portion 347 in the axial direction AD. In the motor device 60, since the flange pin holes 348 are located in the flange thick portion 347, the flange pin holes 348 and the holder pin holes 327 are positioned as close as possible to each other in the axial direction AD. The portion of the positioning pin 355 between the flange pin hole 348 and the holder pin hole 327 in the axial direction AD is made as short as possible. This makes it less likely that the portion of the positioning pin 355 between the flange pin hole 348 and the holder pin hole 327 will deform, causing the rotor 300 to become misaligned relative to the shaft 340 in the circumferential direction CD.

[0165] Because flange pin hole 348 is provided in flange thick portion 347, the portion of positioning pin 355 that fits into flange pin hole 348 is made as long as possible in the axial direction AD. This makes it easier for positioning pin 355 to stand with good positioning accuracy relative to flange pin hole 348. Furthermore, because shaft flange 342 has flange thick portion 347, it is locally thick. Therefore, unlike a configuration in which the entire shaft flange 342 is thick, the weight of shaft flange 342 can be reduced while preventing rattle of positioning pin 355 relative to flange pin hole 348.

[0166] In the motor device 60, the first rotor 300a and the second rotor 300b are in a point-symmetric relationship. Therefore, one of the two components used as the rotor 300 can be the first rotor 300a, and the other can be the second rotor 300b, arranged so as to be point-symmetric with respect to the first rotor 300a. By sharing the same components as the first rotor 300a and the second rotor 300b in this way, the cost of manufacturing the first rotor 300a and the second rotor 300b can be reduced.

[0167] <Constituent group Ca> 46 and 47, the motor housing 70 has an inner circumferential surface 70b. The inner circumferential surface 70b is included in the inner surface of the motor housing 70 and extends annularly in the circumferential direction CD as a whole.

[0168] The motor housing 70 has a stator holding portion 171. The stator holding portion 171 is a protrusion provided on the inner circumferential surface 70b. The stator holding portion 171 protrudes radially inward from the housing main body 71. A plurality of stator holding portions 171 are arranged in at least one of the circumferential direction CD and the axial direction AD. The stator holding portion 171, together with the housing main body 71, form the inner circumferential surface 70b.

[0169] The multiple stator holding portions 171 include a first circumferential holding portion 172, a second circumferential holding portion 173, and a shaft holding portion 174. The first circumferential holding portion 172 and the second circumferential holding portion 173 extend in the circumferential direction CD along the housing main body 71. The first circumferential holding portion 172 and the second circumferential holding portion 173 are aligned in the axial direction AD and are provided parallel to each other. The first circumferential holding portion 172 is provided closer to the rear frame 370 than the second circumferential holding portion 173 in the axial direction AD. The first circumferential holding portion 172 is located at a position spaced apart from the end of the motor housing 70 on the rear frame 370 side toward the second circumferential holding portion 173. The second circumferential holding portion 173 is located at a position spaced apart from the end of the motor housing 70 on the opposite side from the inverter device 80 toward the first circumferential holding portion 172.

[0170] The shaft holding portion 174 extends in the axial direction AD along the housing main body 71. A plurality of the shaft holding portions 174 are arranged in the circumferential direction CD. The shaft holding portion 174 is bridged between the first circumferential holding portion 172 and the second circumferential holding portion 173 in the axial direction AD. The shaft holding portion 174 connects the first circumferential holding portion 172 and the second circumferential holding portion 173.

[0171] The motor housing 70 has a retaining recess 175. The retaining recess 175 is formed by a first circumferential retaining portion 172, a second circumferential retaining portion 173, and a shaft retaining portion 174. The retaining recess 175 is formed between the first circumferential retaining portion 172 and the second circumferential retaining portion 173 in the axial direction AD and between two adjacent shaft retaining portions 174 in the circumferential direction CD. The retaining recess 175 is a recess that is recessed radially outward relative to the first circumferential retaining portion 172, the second circumferential retaining portion 173, and the shaft retaining portion 174. A plurality of the retaining recesses 175 are arranged in the circumferential direction CD together with the shaft retaining portions 174.

[0172] As shown in Figures 48 and 49, inside the motor housing 70, the coil protection part 250 is overlapped on the inner circumferential surface 70b. The coil protection part 250 is in intimate contact with the inner circumferential surface 70b. The coil protection part 250 is inserted between the first circumferential holding part 172 and the second circumferential holding part 173 in the axial direction AD. The coil protection part 250 is inserted between two adjacent axial holding parts 174 in the circumferential direction CD. The coil protection part 250 is inserted inside the holding recess 175 and overlaps the inner surface of the holding recess 175.

[0173] The coil protection portion 250 is in a state of spanning between the first circumferential holding portion 172 and the second circumferential holding portion 173 in the axial direction AD. For example, the coil protection portion 250 is overlapped on the tip end surfaces of the first circumferential holding portion 172 and the second circumferential holding portion 173. Note that the coil protection portion 250 may protrude outward from the first circumferential holding portion 172 and the second circumferential holding portion 173 in the axial direction AD.

[0174] As shown in FIG. 49 , the multiple shaft holders 174 are arranged in the circumferential direction CD in accordance with the positions of the coil portions 215. The number of shaft holders 174 arranged in the circumferential direction CD is the same as the number of coil portions 215 arranged in the circumferential direction CD. The shaft holders 174 and the coil portions 215 are arranged in the axial direction AD and face each other in the axial direction AD. The coil portions 215 are provided at a position where their coil axes Cc pass through the shaft holders 174. The coil axes Cc are straight imaginary lines that pass through the centers of the coil portions 215 and extend in the radial direction RD. For example, the coil portions 215 are arranged at a position where their coil axes Cc pass through the centers of the shaft holders 174 in the circumferential direction CD. Furthermore, the coil portions 215 are arranged at a position where their coil axes Cc pass through the centers of the shaft holders 174 in the axial direction AD.

[0175] 49 is a cross-sectional view of the motor housing 70 and the stator 200, in which the outer circumferential surface 70a extends linearly. The motor housing 70 corresponds to the electric machine housing, and the shaft holding portion 174 corresponds to the shaft protrusion.

[0176] It is preferable that the coil protection part 250 has high thermal conductivity and electrical insulation. However, if it is difficult to increase both the thermal conductivity and the electrical insulation of the coil protection part 250, it is preferable to prioritize increasing the thermal conductivity over the electrical insulation. For example, the thermal conductivity of the coil protection part 250 is higher than that of the bobbin 240. Specifically, the thermal conductivity of the coil protection part 250 is higher than that of the bobbin 240. On the other hand, the electrical insulation of the coil protection part 250 is lower than that of the bobbin 240. Specifically, the dielectric constant of the coil protection part 250 is higher than that of the bobbin 240.

[0177] Next, a method for manufacturing the stator 200 among the methods for manufacturing the motor device 60 will be described. In the process of manufacturing the stator 200, a worker prepares the coil unit 210 and the motor housing 70 as a preparation step. Then, the worker places the coil unit 210 inside the motor housing 70 and mounts the motor housing 70 together with the coil unit 210 in a mold. The worker molds the coil protection part 250 inside the motor housing 70 by injection molding. In this motor device 60 in which the coil unit 210 and the motor housing 70 are integrated into the coil protection part 250 by insert molding, the coil protection part 250 is in intimate contact with both the coil part 215 and the inner circumferential surface 70b.

[0178] <Constitution group Cb> As shown in FIG. 50, the inner circumferential surface 70b of the motor housing 70 includes a housing base surface 176 and a housing rough surface 177. The housing rough surface 177 is rougher than the housing base surface 176. The housing rough surface 177 is roughened, for example, by providing a large number of minute irregularities. The housing rough surface 177 is formed by roughening the motor housing 70. The roughening method for forming the housing rough surface 177 includes mechanical processing and chemical processing.

[0179] The housing base surface 176 is provided outward in the axial direction AD from the stator holding portion 171. For example, the housing base surface 176 is provided outward in the axial direction AD from the first circumferential holding portion 172 and the second circumferential holding portion 173. The housing base surface 176 is formed in an annular shape along the inner circumferential surface 70b.

[0180] The housing rough surface 177 is provided inside the housing base surface 176, including the outer surface of the stator holding portion 171, in the axial direction AD. The housing rough surface 177 is provided on at least the inner surface of the holding recess 175. The housing rough surface 177 is provided on the outer surface of the stator holding portion 171. For example, the housing rough surface 177 is provided on the outer surfaces of the first circumferential holding portion 172, the second circumferential holding portion 173, and the shaft holding portion 174. Note that in Figure 50, the housing rough surface 177 is indicated by dot hatching.

[0181] At least the portion of the inner circumferential surface 70b on which the coil protection part 250 is placed is the housing rough surface 177. The housing rough surface 177 is a surface to which the coil protection part 250 is more likely to adhere than the housing base surface 176. The housing rough surface 177 also tends to have a larger surface area than the housing base surface 176. Therefore, the contact area between the housing rough surface 177 and the coil protection part 250 tends to be larger.

[0182] <Composition group Cc> As shown in Figures 51 and 52, in the stator 200, the power lead-out wire 212 is led out from the coil protection part 250. The grommet 255 is formed from a resin material or the like and has electrical insulation properties. The portion of the power lead-out wire 212 led out from the coil protection part 250 is protected by the grommet 255. The grommet 255 is included in the motor device 60. The grommet 255 covers the power lead-out wire 212, spanning the boundary between the portion of the power lead-out wire 212 embedded inside the coil protection part 250 and the portion of the power lead-out wire 212 exposed from the coil protection part 250. Note that the coil protection part 250 is not shown in Figure 51.

[0183] The grommet 255 has an embedded portion 255a and an exposed portion 255b. The embedded portion 255a is a portion of the grommet 255 that is embedded in the coil protection portion 250. The exposed portion 255b is a portion of the grommet 255 that is exposed from the coil protection portion 250. The exposed portion 255b extends from the embedded portion 255a toward the outside of the coil protection portion 250. The exposed portion 255b extends, for example, from the embedded portion 255a toward the rear frame 370 in the axial direction AD.

[0184] The power lead wires 212 are led out from the coil protection part 250 so as to extend in the axial direction AD along the inner circumferential surface 70b of the motor housing 70. As shown in FIGS. 52 and 53 , the motor housing 70 is provided with lead grooves 171a. The power lead wires 212 are led out from the coil protection part 250 through the lead grooves 171a. The lead grooves 171a are provided in the stator holding part 171. The lead grooves 171a are provided in the first circumferential holding part 172 and penetrate the first circumferential holding part 172 in the axial direction AD while being open radially inward.

[0185] As shown in FIGS. 51 and 52 , the grommet 255 covers at least the portion of the power lead-out wire 212 that passes through the lead-out groove 171a. The grommet 255 is inserted into the lead-out groove 171a from the radially inner side together with the power lead-out wire 212. The grommet 255 is in close contact with the inner surface of the lead-out groove 171a. The grommet 255 fills the gap between the inner surface of the lead-out groove 171a and the power lead-out wire 212. The grommet 255 is, for example, elastically deformable, and is fitted into the lead-out groove 171a by elastic deformation. The power lead-out wire 212 corresponds to a coil lead-out wire, and the grommet 255 corresponds to a lead-out wire protector.

[0186] Next, a method for manufacturing the coil protection part 250 among the methods for manufacturing the stator 200 will be described. In the process of manufacturing the coil protection part 250, a worker prepares the coil unit 210, the motor housing 70, and the grommet 255 as a preparation process. Then, the worker attaches the grommet 255 to the power lead wire 212 of the coil unit 210. The worker installs the coil unit 210 inside the motor housing 70 and fits the grommet 255 together with the power lead wire 212 into the lead groove part 171a.

[0187] An operator mounts the coil unit 210 and the motor housing 70 with the grommet 255 in a mold, and molds the coil protection part 250. In this case, because the grommet 255 is fitted in the drawing groove part 171a, the grommet 255 prevents the molten resin from flowing out of the drawing groove part 171a.

[0188] <Composition group Cd> 54, the core unit 230 has a core 231 and a bobbin 240. The core unit 230, together with the coil 211, is permanently covered by the coil protection part 250 and is protected by the coil protection part 250. The coil protection part 250 is in intimate contact with at least a part of the bobbin 240.

[0189] The bobbin 240 is made of a resin material or the like. The bobbin 240 is made of, for example, an epoxy-based thermosetting resin. The bobbin 240 is, for example, a molded resin formed by molding. The bobbin 240 has electrical insulation properties. The bobbin 240 has thermal conductivity, which allows heat from the core 231 to be easily transferred. The bobbin 240 has a thermal conductivity greater than that of air, for example.

[0190] The bobbin 240 covers at least a portion of the core 231 to protect the core 231. The bobbin 240 covers the core 231 so as to extend in a direction perpendicular to the axial direction AD. The bobbin 240 is formed in an annular shape as a whole. The bobbin 240 is in intimate contact with the outer surface of the core 231. The bobbin 240 facilitates the transfer of heat from the coil 211 to the coil protection part 250.

[0191] It is preferable that the bobbin 240 has high thermal conductivity and electrical insulation. However, if it is difficult to increase both the thermal conductivity and the electrical insulation of the bobbin 240, it is preferable to prioritize increasing the electrical insulation over the thermal conductivity. For example, the electrical insulation of the bobbin 240 is higher than the electrical insulation of the coil protection part 250. Specifically, the dielectric constant of the bobbin 240 is lower than the dielectric constant of the coil protection part 250. On the other hand, the thermal conductivity of the bobbin 240 is lower than the thermal conductivity of the coil protection part 250. Specifically, the thermal conductivity of the bobbin 240 is lower than the thermal conductivity of the coil protection part 250.

[0192] <Composition group Ce> 55, the bobbin 240 has a bobbin body 241 and a bobbin flange 242. The bobbin body 241 is formed in a columnar shape as a whole and extends in the axial direction AD. The outer peripheral surface 241a of the bobbin body 241 is formed in an annular shape so as to extend in a direction perpendicular to the axial direction AD.

[0193] The bobbin flange 242 extends outward from the outer peripheral surface 241a. The bobbin flange 242 extends from the outer peripheral surface 241a in a direction perpendicular to the axial direction AD and is formed in a plate shape as a whole. A pair of bobbin flanges 242 are provided side by side in the axial direction AD. In the bobbin 240, the coil 211 is wound around the bobbin body portion 241 between the pair of bobbin flanges 242.

[0194] The bobbin flange 242 has a flange inner plate surface 243, a flange outer plate surface 244, and a flange end surface 245. Of the pair of plate surfaces of the bobbin flange 242, the plate surface facing the bobbin barrel 241 is the flange inner plate surface 243, and the plate surface opposite the bobbin barrel 241 is the flange outer plate surface 244. The flange inner plate surfaces 243 of the pair of bobbin flanges 242 face each other. The flange end surface 245 is the tip surface of the bobbin flange 242 and extends in a direction perpendicular to the axial direction AD. The flange end surface 245 is located at a position spaced outward from the bobbin barrel 241.

[0195] The outer surface of the bobbin 240 includes a bobbin base surface 246 and a bobbin rough surface 247. The bobbin rough surface 247 is rougher than the bobbin base surface 246. The bobbin rough surface 247 is roughened, for example, by providing a large number of minute irregularities. The bobbin rough surface 247 is formed by roughening the bobbin 240 to form a rough surface. The roughening process for forming the bobbin rough surface 247 can be mechanical processing or chemical processing. In FIG. 55, the bobbin rough surface 247 is indicated by dot hatching.

[0196] The bobbin base surface 246 includes, for example, an outer peripheral surface 241a, a flange inner plate surface 243, and a flange outer plate surface 244. The bobbin rough surface 247 includes, for example, a flange end surface 245. Note that the flange outer plate surface 244 may be included in the rough surface.

[0197] In the bobbin 240, at least the portion on which the coil protection part 250 is overlapped is the bobbin rough surface 247. As shown in FIG. 56 , in the coil unit 210, when the coil 211 is wound around the bobbin 240, at least the flange outer plate surface 244 and the flange end surface 245 are exposed to the outside. Also, in the motor device 60, when the coil unit 210 is covered with the coil protection part 250, the coil protection part 250 covers at least the flange end surface 245. In other words, the coil protection part 250 overlaps the flange end surface 245. The coil protection part 250 basically does not cover the flange outer plate surface 244.

[0198] In the motor device 60, the flange end surface 245 is included in the bobbin rough surface 247, which makes it easier for the coil protection part 250 to come into close contact with the flange end surface 245. In addition, the flange end surface 245, which is the bobbin rough surface 247, tends to have a larger surface area than the bobbin base surface 246. Therefore, the contact area between the flange end surface 245 and the coil protection part 250 tends to be larger.

[0199] <Composition group Cf> 57 and 58, the core 231 has a core body portion 232 and a core flange 233. The core body portion 232 is formed in a plate shape as a whole and extends in the axial direction AD. The outer peripheral surface 232a of the core body portion 232 is formed in an annular shape so as to extend in a direction perpendicular to the axial direction AD.

[0200] The core flange 233 extends outward from the outer peripheral surface 232a. The core flange 233 extends from the outer peripheral surface 232a in a direction perpendicular to the axial direction AD and is formed in a plate shape as a whole. A pair of core flanges 233 are provided side by side in the axial direction AD. In the core 231, the coil 211 is wound around the core body portion 232 between the pair of core flanges 233 via the bobbin body portion 241.

[0201] As shown in Figures 58 and 59, the core 231 as a whole gradually tapers radially inward. The core width of the core 231 gradually decreases radially inward. The core width is the width dimension of the core 231 in the circumferential direction CD. The outer surface of the core 231 includes a core step surface 234. The core step surface 234 extends in a stepped manner in the radial direction RD. The core step surface 234 is provided on each of the core body portion 232 and the core flange 233. A pair of core step surfaces 234 are provided side by side in the circumferential direction CD on each of the core body portion 232 and the core flange 233.

[0202] The core stair surface 234 has a stair base surface 234a and a stair connection surface 234b. A plurality of stair base surfaces 234a and stair connection surfaces 234b are arranged in the radial direction RD. The stair base surfaces 234a extend in a direction perpendicular to the circumferential direction CD. Of two stair base surfaces 234a adjacent to each other in the radial direction RD, the radially inner stair base surface 234a is positioned more inward in the circumferential direction CD than the radially outer stair base surface 234a. The stair connection surface 234b extends in a direction perpendicular to the radial direction RD. The stair connection surface 234b connects two stair base surfaces 234a adjacent to each other in the radial direction RD.

[0203] The core 231 is formed by a plurality of core forming plate materials 236. As shown in FIG. 60 , the core forming plate material 236 is a thin plate-like member. The core forming plate material 236 is formed, for example, from a soft magnetic material. The core 231 is formed by stacking a plurality of core forming plate materials 236. The core 231 includes a plurality of types of core forming plate materials 236 with different sizes and shapes. In the core 231, a plurality of types of core forming plate materials 236 are used to match the core width. In the core 231, the multiple core forming plate materials 236 that form one staircase base surface 234a are one type of core forming plate material 236 with the same size and shape. The core 231 includes at least as many types of core forming plate materials 236 as the number of staircase base surfaces 234a.

[0204] In the core 231, multiple core forming plates 236 are stacked, making it difficult for eddy currents to occur. This reduces eddy current loss that occurs in the core 231. In the core unit 230, the bobbin 240 is stacked on at least the core stepped surface 234. The core 231 includes the core stepped surface 234 on its outer surface, which tends to increase the surface area. In the core unit 230, the core stepped surface 234 tends to increase the contact area between the core 231 and the bobbin 240.

[0205] Among the methods for manufacturing the motor device 60, a method for manufacturing the core 231 and the core unit 230 will be described. In the process of manufacturing the core 231, an operator prepares multiple types of core forming plate materials 236. Then, the operator stacks multiple core forming plate materials 236 of one type to create one staircase base surface 234a, and performs this process for multiple staircase base surfaces 234a, thereby creating the core 231.

[0206] In the process of manufacturing the core unit 230, an operator prepares the core 231 as a preparation process. Then, the operator mounts the core 231 in a mold and forms the bobbin 240 by molding. In the core unit 230 in which the core 231 is integrated with the bobbin 240 by insert molding in this manner, the bobbin 240 is in close contact with the core 231. In the core 231, the bobbin 240 is in close contact with the core stepped surface 234.

[0207] For example, unlike the present embodiment, a configuration is assumed in which the core width of the core 231 continuously decreases radially inward. In this configuration, the outer surface of the core 231 includes a tapered surface rather than a stepped core surface 234. Therefore, forming a tapered surface by stacking multiple core forming plate materials 236 requires a large number of different core forming plate materials 236. Regarding the manufacture of the core 231, there is a concern that the cost of manufacturing the core forming plate materials 236 increases as the number of different core forming plate material 236 increases. In contrast, in the present embodiment, the core width of the core 231 gradually decreases radially inward, so the number of different core forming plate material 236 can be limited. Therefore, regarding the manufacture of the core 231, the cost of manufacturing the core forming plate materials 236 can be reduced.

[0208] <Composition group Cg> As shown in Figures 61, 62, 63, and 64, the bobbin 240 has flange recesses 243a. The flange recesses 243a are provided in each of the pair of bobbin flanges 242. The flange recesses 243a are recesses provided in the flange inner plate surface 243. The flange recesses 243a are provided on one side of the bobbin barrel portion 241 in the circumferential direction CD. The flange recesses 243a are not provided on the other side of the bobbin barrel portion 241 in the circumferential direction CD. The flange recesses 243a extend in the radial direction RD along the bobbin barrel portion 241. Both end ends of the flange recesses 243a are open in the radial direction RD. The flange recesses 243a are open toward the opposite side of the bobbin barrel portion 241 in the circumferential direction CD. The flange recesses 243a provided in each of the pair of bobbin flanges 242 face each other in the axial direction AD. The flange inner plate surface 243 corresponds to the flange surface.

[0209] 65, in the coil unit 210, a flange recess 243a is used to draw out the power lead wire 212 from the coil 211. In the coil section 215, the flange recess 243a is used to draw out the first extension wire 216. In the coil section 215, the coil wire 220 is drawn through the flange recess 243a to form the first extension wire 216.

[0210] On the side opposite the flange recessed portion 243a across the bobbin body portion 241 in the circumferential direction CD, the absence of the flange recessed portion 243a reduces the likelihood of dead space being generated between the coil portion 215 and the flange inner plate surface 243. In this way, the likelihood of dead space being generated between the pair of bobbin flanges 242 can increase the space factor of the coil 211 in the bobbin 240. In the bobbin 240, the smaller the dead space generated between the pair of bobbin flanges 242, the higher the space factor of the coil 211.

[0211] <Constituent group Da> As shown in Figure 66, in the motor device unit 50, the unit housing 51 has a motor housing 70 and an inverter housing 90. The outer peripheral surface of the unit housing 51 includes an outer peripheral surface 70a of the motor housing 70 and an outer peripheral surface 90a of the inverter housing 90. The outer peripheral surface of the unit housing 51 is provided with motor fins 72 and inverter fins 92. The unit housing 51 accommodates a stator 200, a rotor 300, and an inverter 81. In the motor device unit 50, the motor fins 72 and the inverter fins 92 make it easy for heat from the motor 61 and the inverter 81 to be released to the outside.

[0212] In the unit housing 51, the motor housing 70 and the inverter housing 90 are integrated. The motor housing 70 and the inverter housing 90 are arranged in the axial direction AD along the motor axis Cm. The motor housing 70 corresponds to the electric machine housing, and the inverter housing 90 corresponds to the device housing.

[0213] The motor housing 70 and the inverter housing 90 are fixed together by a housing fastener 52. The housing fastener 52 is a fastener such as a bolt. The housing fastener 52 connects a connecting flange 74 of the motor housing 70 to a connecting flange 94 of the inverter housing 90. The connecting flange 74 is provided on the outer peripheral surface 70a of the motor housing 70 and protrudes radially outward from the housing main body 71. The connecting flange 94 is provided on the outer peripheral surface 90a of the inverter housing 90 and protrudes radially outward from the housing main body 91.

[0214] As shown in Figures 66 and 67, the coil protection part 250 is overlapped on the inner circumferential surface 70b of the motor housing 70. The inner circumferential surface 70b of the motor housing 70 is included in the inner circumferential surface of the unit housing 51. The coil protection part 250 is overlapped on the inner circumferential surface of the unit housing 51. The coil protection part 250 is in intimate contact with the inner circumferential surface of the unit housing 51.

[0215] <Configuration group Db> As shown in Figures 68 and 69, in the shaft 340, the rim 344 of the shaft flange 342 is formed in a plate shape as a whole. A pair of plate surfaces of the rim 344 face the radial direction RD. The thickness direction of the rim 344 is the radial direction RD. The rim 344 extends annularly in the circumferential direction CD and corresponds to an annular portion. The rim 344 forms the outer peripheral end of the shaft flange 342. The rim 344 is in a state of spanning between the first rotor 300a and the second rotor 300b in the axial direction AD.

[0216] As shown in FIG. 68, the rim 344 is provided inside the stator 200. The rim 344 is located at a distance radially inward from the stator 200. The rim 344 divides the inner space of the stator 200 in the radial direction RD. The inner space of the stator 200 is a space that exists radially inside the coil protection part 250. This inner space is sometimes referred to as the inner region. The rim 344 extends in the axial direction AD along the inner circumferential surface of the coil protection part 250. In the axial direction AD, the height dimension of the rim 344 and the height dimension of the coil protection part 250 are approximately the same.

[0217] As shown in Figures 69, 70, 71, and 72, the shaft flange 342 has a flange vent 346. The flange vent 346 is provided in the rim 344 and penetrates the rim 344 in the radial direction RD. The flange vent 346 is located at a position spaced apart from both of the pair of rim tip ends 344a in the axial direction AD. For example, the flange vent 346 is located at a middle position of the rim 344 in the axial direction AD.

[0218] A plurality of flange vents 346 are arranged in the circumferential direction CD. In the shaft flange 342, the flange vents 346 and the spokes 343 are arranged in the circumferential direction CD. Each flange vent 346 is provided between two adjacent spokes 343 in the circumferential direction CD. Each of the two spokes 343 adjacent to each other in the circumferential direction CD across a flange vent 346 is located at a distance from the flange vent 346.

[0219] In FIG. 68 , the flange air vents 346 allow ventilation in the radial direction RD in the internal space of the motor device 60. The flange air vents 346 connect a space radially inward of the rim 344 with a space radially outward of the rim 344. In the internal space of the coil protection part 250, heat from the stator 200 is easily released to the inside of the rim 344 through the flange air vents 346. Furthermore, the stator 200 is easily cooled by gaseous air flowing through the flange air vents 346 in the radial direction RD. Inside the motor housing 70, air convection in the radial direction RD is easily generated through the flange air vents 346.

[0220] <Composition group Dc> As shown in Figures 73 and 74, the rotor 300 has holder adjustment holes 326. The holder adjustment holes 326 are provided in the magnet holder 320. The holder adjustment holes 326 penetrate the magnet holder 320 in the axial direction AD, and thereby penetrate the rotor 300 in the axial direction AD. The holder adjustment holes 326 are provided radially inward of the magnets 310. For example, the holder adjustment holes 326 are provided between the holder fixing holes 325 and the magnet fixing device 335 in the radial direction RD. A plurality of holder adjustment holes 326 are arranged in the circumferential direction CD. For example, the number of holder adjustment holes 326 arranged is the same as the number of magnet fixing devices 335.

[0221] The rotor 300 may be out of balance due to, for example, the center of gravity being shifted in the radial direction RD from the motor axis Cm. To achieve balance, a weight member is attached to the magnet holder 320 of the rotor 300. The weight member attached to the rotor 300 is inserted into one of a plurality of holder adjustment holes 326 depending on the balance state of the rotor 300. The weight member is fixed to the holder adjustment hole 326 by, for example, fitting into the holder adjustment hole 326. The balance of the rotor 300 includes static balance when the rotor 300 is not rotating, and rotational balance when the rotor 300 is rotating. The holder adjustment hole 326 corresponds to the balance adjustment hole.

[0222] A portion of the holder adjustment hole 326 is blocked in the axial direction AD by a rim 344. The weight member is inserted into the holder adjustment hole 326 from the rotor second surface 302 side in the axial direction AD. By blocking a portion of the holder adjustment hole 326, the rim 344 prevents the weight member from falling out of the holder adjustment hole 326 toward the rotor first surface 301 side.

[0223] 73, the magnet holder 320 of both the first rotor 300a and the second rotor 300b divides the internal space of the motor housing 70 in the axial direction AD. For example, the magnet holder 320 of the first rotor 300a divides the internal space of the motor housing 70 into a space on the rear frame 370 side and a space on the stator 200 side. The magnet holder 320 of the second rotor 300b divides the internal space of the motor housing 70 into a space on the stator 200 side and a space on the drive frame 390 side.

[0224] The holder adjustment hole 326 allows ventilation in the axial direction AD in the internal space of the motor device 60. The holder adjustment hole 326 connects two spaces that are separated in the axial direction AD by the magnet holder 320. This makes it easier for heat from the stator 200 to be released in the axial direction AD through the holder adjustment hole 326. In addition, air flows through the holder adjustment hole 326 in the axial direction AD, which makes it easier for the stator 200 to be cooled. Inside the motor housing 70, air convection in the axial direction AD is more likely to occur through the holder adjustment hole 326.

[0225] For example, the holder adjustment hole 326 of the first rotor 300a communicates between a space closer to the rear frame 370 than the first rotor 300a and a space closer to the stator 200 than the first rotor 300a. Therefore, heat from the stator 200 is easily released to the rear frame 370 side through the holder adjustment hole 326 of the first rotor 300a. Furthermore, the holder adjustment hole 326 of the second rotor 300b communicates between a space closer to the stator 200 than the second rotor 300b and a space closer to the drive frame 390 than the second rotor 300b. Therefore, heat from the stator 200 is easily released to the drive frame 390 side through the holder adjustment hole 326 of the second rotor 300b.

[0226] <Composition group Dd> As shown in Fig. 75, the rear frame 370 has a frame opening 373. The frame opening 373 penetrates the rear frame 370 in the axial direction AD. The frame opening 373 is an opening that opens the rear frame 370 in the axial direction AD. The frame opening 373 is provided radially outward of the bus bar unit 260 in the radial direction RD. A plurality of the frame openings 373 are arranged in the circumferential direction CD.

[0227] The power lead-out wires 212 are inserted through the frame openings 373 in the axial direction AD. The power lead-out wires 212 are drawn out through the frame openings 373 to the power bus bar 261 side. The portion of the power lead-out wire 212 drawn out from the frame openings 373 is electrically connected to the power bus bar 261. At least one power lead-out wire 212 is inserted through the frame openings 373.

[0228] In the motor device unit 50, the rear frame 370 and the resolver cover 424 divide the interior of the unit housing 51 into an inverter device 80 side and a motor device 60 side. The rear frame 370 and the resolver cover 424 extend as a whole in a direction perpendicular to the axial direction AD. The rear frame 370 and the resolver cover 424 correspond to a housing partition.

[0229] As shown in Figures 75 and 76, the temperature sensor 431 is provided in, for example, the coil unit 210 of the motor 61. For example, a plurality of temperature sensors 431 are provided. The temperature sensor 431 is attached to the neutral point bus bar 290. The neutral point bus bar 290 has a bus bar main body 291 and a sensor support portion 292. The bus bar main body 291 forms the main part of the neutral point bus bar 290. The bus bar main body 291 is suspended across a plurality of coil portions 215 in the neutral point unit 214. The sensor support portion 292 supports the temperature sensor 431. The sensor support portion 292 is, for example, a protrusion protruding from the bus bar main body 291. The temperature sensor 431 is fixed to the sensor support portion 292.

[0230] 75, the motor device 60 has a signal terminal block 440. The signal terminal block 440 is provided on the inverter device 80 side of the rear frame 370 and the resolver cover 424 in the axial direction AD. The signal terminal block 440 is attached to at least one of the rear frame 370 and the resolver cover 424. The signal terminal block 440 is aligned with the resolver connector 423 in a direction perpendicular to the axial direction AD.

[0231] The motor device 60 has a signal wiring 426. The signal wiring 426 extends from the resolver connector 423. The signal wiring 426 is a conductive member such as an electric wire, and forms a signal line 425. The signal wiring 426 is electrically connected to the resolver 421 via the resolver connector 423.

[0232] The motor device 60 has a signal wiring 436. The signal wiring 436 extends from the temperature sensor 431. The signal wiring 436 is a conductive member such as an electric wire, and forms a signal line 435. The signal wiring 436 is electrically connected to the temperature sensor 431.

[0233] The signal terminal block 440 collects the signal wires 426, 436 and corresponds to a wire collecting section. The signal wires 426, 436 are drawn into the signal terminal block 440. The signal terminal block 440 has a plurality of terminal portions and a case that houses these terminal portions. The signal wires 426, 436 drawn into the signal terminal block 440 are electrically connected to the terminal portions, respectively.

[0234] For the resolver 421, a signal wiring 426 is laid between the resolver connector 423 and the signal terminal block 440. The signal wiring 426 extends along the rear frame 370 and the resolver cover 424, closer to the inverter device 80 than the rear frame 370 and the resolver cover 424. The resolver 421 can detect the state of the motor device 60 by detecting the rotation angle of the motor 61. The resolver 421 corresponds to a state detection unit, and the signal wiring 426 corresponds to a detection wiring.

[0235] For the temperature sensor 431, a signal wire 436 is laid between the temperature sensor 431 and a signal terminal block 440. The signal wire 436 is inserted through a frame opening 373, and thereby penetrates the rear frame 370 and the resolver cover 424 in the axial direction AD. The temperature sensor 431 can detect the state of the motor device 60 by detecting the temperature of the motor 61. The temperature sensor 431 corresponds to a state detection unit, and the signal wire 436 corresponds to a detection wire.

[0236] A plurality of inverter wirings of the inverter device 80 are drawn into the signal terminal block 440. The plurality of inverter wirings include inverter wirings that form signal lines 425, 435 together with signal wirings 426, 436. The inverter wirings are electrically connected to the signal wirings 426, 436 via terminal portions in the signal terminal block 440. The inverter wirings connected to the signal wirings 426, 436 are electrically connected to the control device 54 in the inverter device 80, for example.

[0237] <Constitution group De> 77, the dustproof cover 380 covers all of the frame openings 373. The dustproof cover 380 is suspended across the multiple frame openings 373 in the circumferential direction CD. The dustproof cover 380 closes the frame openings 373 from the inverter device 80 side in the axial direction AD. The dustproof cover 380 prevents foreign matter from passing through the frame openings 373 in the axial direction AD.

[0238] The dustproof cover 380 covers the power lead-out wire 212 and the bus bar unit 260 from the inverter device 80 side. The dustproof cover 380 has electrical insulation properties, and prevents a decrease in the insulation reliability between the power lead-out wire 212 and the power bus bar 261 and the inverter device 80. The dustproof cover 380 is inserted between the bus bar unit 260 and the bus bar terminal 263 in the axial direction AD.

[0239] The signal wiring 436 extending from the temperature sensor 431 penetrates the dustproof cover 380 and is drawn out to the inverter device 80 side. The dustproof cover 380 has a wiring hole 381. The wiring hole 381 penetrates the dustproof cover 380 in the axial direction AD. The signal wiring 436 penetrates the dustproof cover 380 by passing through the wiring hole 381. The wiring hole 381 has a size and shape that allows it to be blocked by the signal wiring 436. When the signal wiring 436 is passed through the wiring hole 381, foreign matter is less likely to pass through the wiring hole 381. The wiring hole 381 is provided at a position closer to the outer periphery of the dustproof cover 380 than to the inner periphery. A plurality of wiring holes 381 are provided in the dustproof cover 380. One signal wiring 436 is passed through one wiring hole 381.

[0240] The rear frame 370 and the resolver cover 424 correspond to a housing partition, and the dust cover 380 corresponds to a partition cover. The frame opening 373 corresponds to a partition opening, and the power lead wire 212 corresponds to a coil lead wire. The signal wiring 436 may be routed between the dust cover 380 and the rear frame 370 and led out to the inverter device 80 side.

[0241] <Composition group Df> 78 and 79, the motor housing 70 has a connecting flange 74. The connecting flange 74 extends radially outward from the housing main body 71 and corresponds to an electric flange. A plurality of the connecting flanges 74 are arranged in the circumferential direction CD.

[0242] The connecting flange 74 has a flange hole 74a. The flange hole 74a extends in the axial direction AD. The flange hole 74a penetrates the connecting flange 74 in the axial direction AD. The flange hole 74a is a hole for fixing the motor housing 70 to the inverter housing 90 and corresponds to an electric machine fixing hole. Of the housing main body 71 and the connecting flange 74, the flange hole 74a is provided only in the connecting flange 74. The connecting flange 74 is connected to the connecting flange 94 of the inverter housing 90 by screwing the housing fastener 52 into the flange hole 74a. The inverter housing 90 is a fixing object to which the motor housing 70 is fixed and corresponds to a housing fixing object. The connecting flange 74 is sometimes referred to as an ear portion.

[0243] As described above, in the motor housing 70, of the housing main body 71 and the connecting flange 74, the flange hole 74a is formed only in the connecting flange 74. Therefore, the rigidity of the housing main body 71 is not reduced by the flange hole 74a. In the motor housing 70, flange portions where the connecting flange 74 is formed in the housing main body 71 and non-flange portions where the connecting flange 74 is not formed in the housing main body 71 are arranged alternately in the circumferential direction CD. Even though the flange hole 74a is formed in the connecting flange 74, the thickness dimension of the flange portions in the radial direction RD is larger than the thickness dimension of the non-flange portions. The rigidity of the flange portions is higher than the rigidity of the non-flange portions by the thickness dimension of the connecting flange 74.

[0244] For example, assume a configuration different from the present embodiment in which a hole for fixing the housing fastener 52 is provided in the housing main body 71. In this configuration, the housing main body 71 becomes thinner by the amount of the hole for the housing fastener 52. For this reason, there is a concern that the rigidity of the housing main body 71 will be reduced by the hole for the housing fastener 52.

[0245] As shown in Figures 78 and 80, the motor housing 70 has a fixing flange 178. The fixing flange 178 is provided on the outer peripheral surface 70a of the motor housing 70. The fixing flange 178 protrudes radially outward from the housing main body 71 and corresponds to an electric flange. A plurality of fixing flanges 178 are arranged in the circumferential direction CD.

[0246] The fixing flange 178 has a flange hole 178a. The flange hole 178a extends in the axial direction AD. The flange hole 178a penetrates the fixing flange 178 in the axial direction AD. The flange hole 178a is a hole for fixing the motor housing 70 to the drive frame 390 and corresponds to an electric machine fixing hole. The flange hole 178a is provided only in the fixing flange 178 out of the housing main body 71 and the fixing flange 178. The fixing flange 178 is fixed to the drive frame 390 by screwing a frame fixing device 405 into the flange hole 178a. The drive frame 390 is a fixing target to which the motor housing 70 is fixed and corresponds to a housing fixing target. The fixing flange 178 is sometimes referred to as an ear portion. Note that the drive frame 390 is not shown in Figure 80.

[0247] As described above, in the motor housing 70, of the housing main body 71 and the fixed flange 178, the flange hole 178a is formed only in the fixed flange 178. Therefore, the rigidity of the housing main body 71 is not reduced by the flange hole 178a. In the motor housing 70, flange portions where the housing main body 71 is provided with the fixed flange 178 and non-flange portions where the housing main body 71 is not provided with the fixed flange 178 are arranged alternately in the circumferential direction CD. Even though the fixed flange 178 has the flange hole 178a formed in it, the thickness of the flange portions in the radial direction RD is larger than the thickness of the non-flange portions. The rigidity of the flange portions is higher than the rigidity of the non-flange portions by the thickness of the fixed flange 178.

[0248] For example, assume a configuration different from the present embodiment in which a hole for fixing the frame fastener 405 is provided in the housing main body 71. In this configuration, the housing main body 71 becomes thinner by the amount of the hole for the frame fastener 405. For this reason, there is a concern that the rigidity of the housing main body 71 will be reduced by the hole for the frame fastener 405.

[0249] <Composition group Dg> 81, 82, and 83, the drive frame 390 covers the motor 61 from the side opposite the inverter device 80 in the axial direction AD. The drive frame 390 closes the opening of the motor housing 70 from the second rotor 300b side. The motor housing 70 corresponds to the electric machine housing, and the drive frame 390 corresponds to the electric machine cover portion.

[0250] The drive frame 390 has a frame main body 391 and a fixing flange 392. The frame main body 391 is formed in a plate shape overall and extends in a direction perpendicular to the axial direction AD. The frame main body 391 closes the opening of the motor housing 70. The outer peripheral edge of the frame main body 391 extends in the circumferential direction CD along the outer peripheral surface 70a of the motor housing 70.

[0251] The fixing flanges 392 extend radially outward from the frame main body 391. A plurality of the fixing flanges 392 are arranged in the circumferential direction CD. For example, eight fixing flanges 392 are arranged in the circumferential direction CD. The fixing flanges 392 are positioned to be aligned in the axial direction AD with the fixing flanges 178 of the motor housing 70.

[0252] The fixing flange 392 has a first fixing hole 392a and a second fixing hole 392b. The first fixing hole 392a and the second fixing hole 392b extend in the axial direction AD. The first fixing hole 392a and the second fixing hole 392b penetrate the fixing flange 392 in the axial direction AD. The first fixing hole 392a and the second fixing hole 392b are provided only in the fixing flange 392 out of the frame main body 391 and the fixing flange 392. The first fixing hole 392a and the second fixing hole 392b are aligned in the radial direction RD on the fixing flange 392. The first fixing hole 392a is provided radially inward of the second fixing hole 392b. The first fixing hole 392a is located at a position spaced radially inward from the second fixing hole 392b.

[0253] The first fixing holes 392a are holes for fixing the drive frame 390 to the motor housing 70. The fixing flange 392 is fixed to the fixing flange 178 of the motor housing 70 by screwing a frame fixing tool 405 into the first fixing holes 392a. The fixing flange 392 is sometimes referred to as an ear portion.

[0254] The second fixing holes 392b are holes for fixing the drive frame 390 to the reducer 53. The fixing flange 392 is fixed to the reducer 53 by screwing a reducer fixing tool 53a into the second fixing holes 392b. The reducer 53 is a fixing target to which the drive frame 390 is fixed, and corresponds to a cover fixing target.

[0255] As described above, in the drive frame 390, of the frame main body 391 and the fixing flange 392, the first fixing holes 392a and the second fixing holes 392b are provided only in the fixing flange 392. Therefore, the rigidity of the frame main body 391 is not reduced by the first fixing holes 392a and the second fixing holes 392b.

[0256] For example, assume a configuration different from the present embodiment in which holes for fixing the frame fixing device 405 and the reducer fixing device 53a are provided in the frame main body 391. In this configuration, there is a concern that the rigidity of the frame main body 391 will decrease by the amount of holes formed for the frame fixing device 405 and the reducer fixing device 53a.

[0257] The drive frame 390 has an outer peripheral frame portion 393 and an outer peripheral flange 394. The outer peripheral frame portion 393 spans two adjacent fixing flanges 392 in the circumferential direction CD and connects these fixing flanges 392. The outer peripheral frame portion 393 extends in the circumferential direction CD along the outer peripheral edge of the frame main body 391. A plurality of outer peripheral frame portions 393 are arranged in the circumferential direction CD. The outer peripheral frame portion 393 is located at a position spaced radially outward from the frame main body 391. The outer peripheral frame portion 393 is located at a position spaced radially inward from the tip end of the fixing flange 392. The outer peripheral frame portion 393 extends in the circumferential direction CD from a portion of the fixing flange 392 between the first fixing hole 392a and the second fixing hole 392b.

[0258] In the drive frame 390, the fixing flange 392 is reinforced by the outer peripheral frame portion 393. Therefore, even if the rigidity of the fixing flange 392 were reduced due to the formation of the two holes, the first fixing hole 392a and the second fixing hole 392b, the rigidity of the fixing flange 392 is compensated for by the outer peripheral frame portion 393.

[0259] The outer peripheral flange 394 extends radially outward from the outer peripheral frame portion 393. The outer peripheral flange 394 is located at a position spaced apart from the fixing flange 392 in the circumferential direction CD. A plurality of the outer peripheral flanges 394 are arranged in the circumferential direction CD. The outer peripheral flange 394 is fixed to the unit duct 100 (see FIG. 2). The outer peripheral flange 394 has holes for fixing the unit duct 100. The unit duct 100 is fixed to the outer peripheral flange 394 by screwing fixing tools such as bolts into these holes.

[0260] <Composition group O> An air-cooling system is used as the cooling system for the motor device unit 50. In this embodiment, the motor device unit 50 is cooled by gas such as external air present outside the motor device unit 50. For example, the motor device 60 is cooled by gas present outside the motor housing 70. In the motor device 60, heat generated in the motor 61 is released into the external air from the motor fins 72, etc.

[0261] As shown in Figures 84 to 86, the motor fins 72 are provided radially outward from the stator coil 211. The motor fins 72 are provided on the motor outer peripheral surface 70a, and are therefore located at a distance radially outward from the stator coil 211. The motor fins 72 dissipate heat from the stator coil 211 and the like to the outside of the motor housing 70. For example, the heat from the stator coil 211 is dissipated to the outside from the motor fins 72 via the coil protection part 250, the housing main body 71, and the like. The motor fins 72 are not provided radially inward from the stator coil 211.

[0262] In the motor device 60, the amount of heat dissipated radially outward from the stator coil 211 is greater than the amount of heat dissipated radially inward from the stator coil 211. The motor fins 72 promote heat dissipation radially outward from the stator coil 211 so that the amount of heat dissipated radially outward from the stator coil 211 is greater than the amount of heat dissipated radially inward from the stator coil 211. The motor fins 72 correspond to a heat dissipation promoting portion and an outer periphery promoting portion.

[0263] The motor fins 72 extend further on both sides of the stator coils 211 in the radial direction RD. The motor fins 72 are disposed between the first rotor 300a and the second rotor 300b in the radial direction RD. The entire stator coils 211 face the motor fins 72 in the radial direction RD. Note that only a portion of the stator coils 211 may face the motor fins 72 in the radial direction RD. In other words, it is sufficient that at least a portion of the stator coils 211 face the motor fins 72.

[0264] Note that the coil protection part 250 and the like are omitted from illustration in Fig. 85. The coil protection part 250, the neutral point bus bar 290, and the like are omitted from illustration in Fig. 86. Furthermore, in the motor housing 70, the outer peripheral surface 70a may be referred to as the motor outer peripheral surface 70a, and the inner peripheral surface 70b may be referred to as the motor inner peripheral surface 70b. The coil 211 may be referred to as the stator coil 211.

[0265] As shown in Figures 84 to 87, the temperature sensor 431 is provided radially inside the stator coil 211. The temperature sensor 431 is located on the opposite side of the motor fins 72 in the radial direction RD. The temperature sensor 431 can detect the internal temperature of the motor housing 70. The temperature sensor 431 is provided at a position in contact with or close to the stator coil 211. A plurality of temperature sensors 431 are arranged radially inside the stator coil 211 in the circumferential direction CD. The temperature sensor 431 detects the coil temperature as the internal temperature of the motor housing 70. The coil temperature is the temperature of the stator coil 211. The temperature sensor 431 corresponds to a temperature detection unit.

[0266] The temperature sensor 431 is provided, for example, on the neutral point bus bar 290. The neutral point bus bar 290 is electrically connected to the stator coil 211. The neutral point bus bar 290 is provided between the stator coil 211 and the shaft main body 341 in the radial direction RD. The neutral point bus bar 290 is made of the same material as the coil wire 220. As described above, the neutral point bus bar 290 is a member in which a plate-shaped conductor is covered with an insulator. The conductor of the neutral point bus bar 290 is made of the same material as the wire 223 of the coil wire 220. The neutral point bus bar 290 corresponds to a conductive bus bar.

[0267] In the stator 200, the stator coils 211 of multiple phases are arranged in an annular shape in the circumferential direction CD. The stator coils 211 of multiple phases may be simply referred to as stator coils 211. In the stator coils 211 of multiple phases, multiple coil portions 215 are arranged in an annular shape in the circumferential direction CD. The neutral bus bar 290 extends in the circumferential direction along the coil inner peripheral surface 211d. The neutral bus bar 290 is suspended around the multiple coil portions 215 in the circumferential direction CD.

[0268] The stator coil 211 has a coil outer peripheral surface 211c and a coil inner peripheral surface 211d. The coil outer peripheral surface 211c is the outer peripheral surface of the stator coil 211. The coil inner peripheral surface 211d is the inner peripheral surface of the stator coil 211. The coil outer peripheral surface 211c and the coil inner peripheral surface 211d extend annularly in the circumferential direction CD as a whole. In the stator 200, the multiple coil portions 215 are arranged in the circumferential direction CD, and as a result, the coil outer peripheral surface 211c and the coil inner peripheral surface 211d extend discontinuously in the circumferential direction CD.

[0269] The temperature sensor 431 provided on the neutral point bus bar 290 is sometimes referred to as a bus bar sensor 431A. The bus bar sensor 431A is fixed to the neutral point bus bar 290 with an adhesive or the like. For example, the bus bar sensor 431A is fixed to the sensor support portion 292. The bus bar sensor 431A is located at a position spaced apart radially inward from the stator coil 211. A plurality of bus bar sensors 431A are arranged in the circumferential direction CD on the radially inner side of the stator coil 211. The bus bar sensor 431A detects the temperature of the neutral point bus bar 290 at a position close to the stator coil 211. The bus bar sensor 431A detects the temperature of the neutral point bus bar 290 as the coil temperature. The bus bar sensor 431A is in contact with the neutral point bus bar 290. The bus bar sensor 431A corresponds to a temperature detection unit, a bus bar detection unit, and an inner circumference detection unit.

[0270] The busbar sensor 431A is embedded in the coil protection section 250. The busbar sensor 431A is fixed to the neutral busbar 290 by the coil protection section 250 in addition to an adhesive or the like. The busbar sensor 431A is not exposed to the outside of the coil protection section 250. The busbar sensor 431A corresponds to an embedded detection section. The coil protection section 250 protects the temperature sensor 431 in addition to the stator coil 211. It is sufficient that at least a portion of the temperature sensor 431 is embedded in the coil protection section 250. In other words, a portion of the temperature sensor 431 may be exposed from the coil protection section 250.

[0271] The neutral point bus bar 290 is embedded in the coil protection portion 250 together with the bus bar sensor 431A. In the neutral point bus bar 290, both the bus bar main body 291 and the sensor support portion 292 are embedded in the coil protection portion 250. Note that as long as the bus bar sensor 431A is embedded in the coil protection portion 250, at least a portion of the bus bar sensor 431A does not have to be embedded in the coil protection portion 250.

[0272] As shown in Figures 85 and 87, the stator 200 has a coil body 900. The coil body 900 is included in a coil unit 210. The coil body 900 has a coil portion 215 and a core unit 230. A plurality of coil bodies 900 are arranged in the circumferential direction CD along the motor inner circumferential surface 70b. The coil body 900 as a whole extends in a columnar shape in the axial direction AD. The coil body 900 has a wound coil wire 220 as the coil portion 215. The plurality of coil bodies 900 are arranged in the circumferential direction CD so that each coil wire 220 forms a stator coil 211.

[0273] The coil body 900 has a coil body end face 902 and a coil body outer peripheral face 903. The coil body end face 902 and the coil body outer peripheral face 903 are included in the coil body 900. The coil body end faces 902 are end faces of the coil body 900, and are arranged in pairs in the axial direction AD. The coil body end faces 902 extend in a direction perpendicular to the axial direction AD. The coil body end faces 902 include the end faces of the core 231 and the bobbin 240.

[0274] The coil body outer peripheral surface 903 is the outer peripheral surface of the coil body 900, and extends in the winding direction of the coil portion 215. The coil body outer peripheral surface 903 is provided between a pair of coil body end faces 902. The coil body outer peripheral surface 903 extends in the axial direction AD so as to bridge between the pair of coil body end faces 902. The coil body outer peripheral surface 903 includes the outer peripheral surface of the coil portion 215 and the outer peripheral surface of the bobbin 240.

[0275] The temperature sensor 431 is provided at a position aligned with the coil body 900 in the radial direction RD. The temperature sensor 431 is located so as not to protrude from the coil body 900 in the axial direction AD. The temperature sensor 431 is provided between a pair of coil body end faces 902 in the axial direction AD. For example, at least a portion of the temperature sensor 431 and the coil portion 215 are aligned in the radial direction RD.

[0276] The neutral point bus bar 290 is provided at a position aligned with the stator coil 211 in the radial direction RD. The neutral point bus bar 290 is located at a position not protruding from the coil body 900 in the axial direction AD. The neutral point bus bar 290 is provided between a pair of coil body end faces 902 in the axial direction AD. For example, at least a portion of the neutral point bus bar 290 and the coil portion 215 are aligned in the radial direction RD.

[0277] As shown in Figures 85 and 88, a temperature signal wire 436 is communicatively connected to the temperature sensor 431. The signal wire 436 is sometimes referred to as a temperature signal wire 436. The temperature signal wire 436 is capable of outputting a detection signal of the temperature sensor 431. The temperature sensor 431 and the control device 54 are communicable via the temperature signal wire 436, a signal terminal block 440, etc.

[0278] The temperature signal wiring 436 is communicatively connected to the bus bar sensor 431A. The temperature signal wiring 436 runs from the bus bar sensor 431A around the radial outside of the stator coil 211 so as to cross the stator coil 211 in the radial direction RD. The temperature signal wiring 436 runs between two coil bodies 900 adjacent in the circumferential direction CD and crosses the stator coil 211 in the radial direction RD. The temperature signal wiring 436 extends from the radial outside of the stator coil 211 in the axial direction AD, and is drawn out from the frame opening 373 to the signal terminal block 440 side. The temperature signal wiring 436 corresponds to a temperature communication line.

[0279] The temperature signal wiring 436 has a crossing wire portion 437 and a lead-out wire portion 438. The lead-out wire portion 438 is a portion of the temperature signal wiring 436 that is led out from the radially outer side of the stator coil 211 to the signal terminal block side.

[0280] As shown in FIGS. 88 to 90 , the transverse wire portion 437 is a portion of the temperature signal wiring 436 that extends to transverse the stator coil 211 in the radial direction RD. The transverse wire portion 437 extends in the radial direction RD, passing between two coil bodies 900 that are adjacent in the circumferential direction CD. The transverse wire portion 437 is fixed to at least one of the two coil bodies 900 with an adhesive or the like. For example, the transverse wire portion 437 is fixed to the coil wire 220 included in the coil body 900. The transverse wire portion 437 is fixed to a portion of the coil wire 220 that forms the coil portion 215.

[0281] The temperature signal wiring 436 is fixed to the coil body 900 and the coil unit 210 by the coil protection part 250 in addition to adhesive or the like. The end of the temperature signal wiring 436 on the temperature sensor 431 side is embedded in the coil protection part 250 together with the temperature sensor 431. The end of the temperature signal wiring 436 opposite the temperature sensor 431 is drawn out from the coil protection part 250. At least the crossing line part 437 of the temperature signal wiring 436 is embedded in the coil protection part 250.

[0282] The temperature signal wiring 436 passes through the interior of one of the two coil bodies 900 adjacent in the circumferential direction CD and extends in the radial direction RD. The temperature signal wiring 436 that passes through the interior of one of the coil bodies 900 is sometimes referred to as a passing signal wire 436A. In the passing signal wire 436A, a crossing wire portion 437 passes through one of the coil bodies 900 and extends in the radial direction RD. The crossing wire portion 437 is provided in a position closer to one of the two coil bodies 900. The crossing wire portion 437 is located away from the other coil body 900 in the circumferential direction CD.

[0283] The passing signal line 436A extends in the radial direction RD through a position in one of the coil bodies 900 that is inserted between the pair of bobbin flanges 242. The passing signal line 436A corresponds to a temperature communication line and an inlet line. In the passing signal line 436A, a crossing line portion 437 is provided in one of the coil bodies 900 at a position that is inserted between the pair of bobbin flanges 242. The crossing line portion 437 extends in the radial direction RD inside the coil body outer peripheral surface 903 so as not to protrude from the coil body outer peripheral surface 903 in the circumferential direction CD, for example. Note that the crossing line portion 437 may protrude from the coil body outer peripheral surface 903 in the circumferential direction CD. In other words, it is sufficient that at least a portion of the crossing line portion 437 is inserted between the pair of bobbin flanges 242.

[0284] The passing signal wire 436A extends radially inward from the busbar sensor 431A through the flange recess 243a. As shown in FIGS. 89 and 90 , the passing signal wire 436A has a crossing wire portion 437 that passes through a position where it enters one of the flange recesses 243a of the pair of bobbin flanges 242. The crossing wire portion 437 extends in the radial direction RD through the flange recess 243a without protruding from the flange recess 243a in either the circumferential direction CD or the axial direction AD. The crossing wire portion 437 is fixed to the coil wire 220 passing through the flange recess 243a with an adhesive or the like. For example, the crossing wire portion 437 is fixed to a portion of the coil wire 220 connected to the first extension wire 216. The portion of the coil wire 220 connected to the first extension wire 216 is also connected to the neutral lead wire 213. It is sufficient that at least a portion of the crossing wire portion 437 enters the inside of the flange recess 243a. The crossing wire portion 437 may be fixed to the portion of the coil wire 220 that is connected to the second extension wire 217.

[0285] Next, a method for manufacturing the stator 200 with the temperature sensor 431 will be described, among the methods for manufacturing the motor device 60. In a preparation step, a worker prepares the coil unit 210, the motor housing 70, and the temperature sensor 431 with the temperature signal wiring 436. After the preparation step, the worker performs a temporary fixing step. In the temporary fixing step, the worker temporarily fixes the temperature sensor 431 and the temperature signal wiring 436 to the coil unit 210 with an adhesive or the like. For example, the worker temporarily fixes the bus bar sensor 431A to the neutral point bus bar 290, and temporarily fixes the temperature signal wiring 436 to the coil wire 220.

[0286] After the temporary fixing step, the worker performs the molding step. In the molding step, the worker mounts the motor housing 70 together with the coil unit 210, the temperature sensor 431, and the temperature signal wire 436 into a mold. The worker then forms the coil protection part 250 by injection molding. By performing the temporary fixing step before the molding step, the temperature sensor 431 and the temperature signal wire 436 are less likely to become misaligned with respect to the coil unit 210 when the molten resin is injected. This prevents the temperature sensor 431 and the temperature signal wire 436 from being exposed from the coil protection part 250 and coming into contact with the rotor 300 or the shaft 340.

[0287] <Composition group A> According to the present embodiment described so far, the neutral point bus bar 290 is electrically insulating and is provided at a position separated from the bus bar protector 270 that protects the power bus bar 261. With this configuration, not only is there no contact between the neutral point bus bar 290 and the power bus bar 261, but there is also no contact between the neutral point bus bar 290 and the bus bar protector 270. Therefore, by separating the neutral point bus bar 290 from the bus bar protector 270, it is possible to suppress a decrease in the insulation reliability of the electrical insulation state between the neutral point bus bar 290 and the power bus bar 261. Therefore, by separating the neutral point bus bar 290 from the bus bar protector 270, it is possible to improve the electrical insulation reliability of the motor device 60.

[0288] According to this embodiment, the power bus bar 261 is provided in one of the stator-side space S1 and the inverter-side space S2, which are aligned in the axial direction AD, and the neutral point bus bar 290 is provided in the other. Specifically, the power bus bar 261 is provided in the inverter-side space S2, and the neutral point bus bar 290 is provided in the stator-side space S1. Furthermore, the stator-side space S1 and the inverter-side space S2 are separated by the rear frame 370. In this configuration, the rear frame 370 prevents the neutral point bus bar 290 from contacting the power bus bar 261. In this manner, the rear frame 370 can suppress a decrease in the insulation reliability of the electrical insulation state between the neutral point bus bar 290 and the power bus bar 261. Therefore, the rear frame 370 can improve the electrical insulation reliability of the motor device 60.

[0289] According to this embodiment, the neutral point bus bar 290 and the bus bar protection part 270 are provided at positions spaced apart in the axial direction AD. With this configuration, the distance between the neutral point bus bar 290 and the bus bar protection part 270 can be made as large as possible. Therefore, in order to improve the insulation reliability between the neutral point bus bar 290 and the power bus bar 261, it is possible to prevent the distance between the neutral point bus bar 290 and the bus bar protection part 270 from becoming insufficient.

[0290] According to this embodiment, the motor device 60 is a rotating electric machine that corresponds to both an axial gap type and a double rotor type. That is, the first rotor 300a and the second rotor 300b are arranged along the motor axis Cm via the stator 200. In this configuration, the axial gap type allows the motor device 60 to be miniaturized, and the double rotor type allows the motor output to be increased. Furthermore, in this configuration, the magnets 310 in each of the first rotor 300a and the second rotor 300b are arranged in a Halbach array. This makes it easy to omit a back yoke in the motor device 60. Furthermore, the coil 211 is formed by winding a coil wire 220 having a plurality of strands 223. This reduces copper loss of the coil wire 220 generated in the coil 211.

[0291] According to this embodiment, the number of turns of two adjacent coil portions 215 in the circumferential direction CD is different. This configuration makes it easy to lead the coil wire 220 of the two coil portions 215 in opposite directions in the radial direction RD. This makes it easy to lead one of the power lead wire 212 and the neutral lead wire 213 of the coil 211 radially outward and the other radially inward. This improves the reliability of the electrical insulation between the power lead wire 212 and the neutral lead wire 213.

[0292] According to the present embodiment, the connection portion between power bus bar 261 and relay terminal 280 is supported by terminal stand 285. In this configuration, even if relative vibration of power bus bar 261 with respect to relay terminal 280 occurs, stress caused by the vibration is easily suppressed by terminal stand 285. This makes it possible to improve the vibration resistance of relay terminal 280 and power bus bar 261 that form output line 143. Therefore, even if relative vibration of motor device 60 with respect to inverter device 80 occurs, it is possible to suppress abnormalities from occurring in output line 143 formed by relay terminal 280 and power bus bar 261.

[0293] For example, unlike the present embodiment, in a configuration in which power bus bar 261 is directly connected to inverter device 80 without going through relay terminal 280, power bus bar 261 is connected across inverter device 80 and motor device 60. For this reason, if vibration occurs between motor device 60 and inverter device 80, stress may be concentrated on power bus bar 261, causing a concern that an abnormality may occur in power bus bar 261. In other words, there is a concern that an abnormality may occur in output line 143 formed by power bus bar 261.

[0294] According to this embodiment, the relay terminal 280 is arranged in each of the divided regions RE. With this configuration, a sufficiently large distance can be ensured between two adjacent relay terminals 280 in the circumferential direction CD. Therefore, even if heat is generated in the relay terminal 280 due to a current flowing through the relay terminal 280, this heat is easily released from the relay terminal 280. Therefore, it is possible to prevent abnormalities from occurring in the motor device 60 due to heat generated in the relay terminal 280.

[0295] According to the present embodiment, the rear frame 370 has a bus bar support portion 371 and a bearing support portion 372. In this configuration, two devices, the power bus bar 261 and the first bearing 360, can be supported by a single member, the rear frame 370. This allows the number of parts constituting the motor device 60 to be reduced.

[0296] For example, assume a configuration different from the present embodiment in which the power bus bar 261 and the first bearing 360 are each supported by independent dedicated members. In this configuration, dedicated members must be used for the power bus bar 261 and the first bearing 360, and these dedicated members must each be fixed to the motor housing 70 or the like. For this reason, with this configuration, there is a concern that the number of parts constituting the motor device 60 will increase.

[0297] According to this embodiment, the resolver 421 is provided on the opposite side of the rear frame 370 from the neutral point bus bar 290 in the axial direction AD. With this configuration, a sufficient distance can be secured between the resolver 421 and the neutral point bus bar 290. Therefore, even if electromagnetic waves are generated by a current flowing through the neutral point bus bar 290, the resolver 421 is less likely to be affected by these electromagnetic waves. For example, it is less likely that noise will be generated in the detection signal of the resolver 421 when current is applied to the neutral point bus bar 290.

[0298] <Composition group B> According to this embodiment, in the rotor 300, a pair of inner axial magnets 312a, 312b adjacent to each other in the circumferential direction CD are oriented at an angle with respect to the motor axis Cm so as to face the stator 200 in the axial direction AD. Furthermore, a pair of circumferential magnets 311a, 311b adjacent to each other in the circumferential direction CD via a pair of inner axial magnets 312a, 312b are oriented so as to face each other in the circumferential direction CD. In this configuration, the magnetic flux from the pair of circumferential magnets 311a, 311b and the pair of inner axial magnets 312a, 312b is concentrated on the stator 200 side, and the magnetic field on the stator 200 side is likely to be strong. Therefore, the energy efficiency of the motor device 60 can be improved.

[0299] According to this embodiment, the pair of inner axial magnets 312a, 312b are oriented at an angle with respect to the motor axis Cm so as to face the stator 200 in the axial direction AD and to face each other in the circumferential direction CD. In this configuration, the magnetic flux generated by the pair of circumferential magnets 311a, 311b and the pair of inner axial magnets 312a, 312b tends to concentrate toward the inner boundary portion BI in the circumferential direction CD. By concentrating the magnetic flux in this manner, the magnetic field on the stator 200 side can be strengthened.

[0300] According to this embodiment, in the rotor 300, a pair of outer-axis magnets 313a, 313b adjacent to each other in the circumferential direction CD are provided on opposite sides via the first circumferential magnet 311a or the second circumferential magnet 311b. The pair of outer-axis magnets 313a, 313b are oriented at an angle with respect to the motor axis Cm so as to face away from the stator 200 in the axial direction AD and to face opposite sides in the circumferential direction CD. In this configuration, the magnetic field on the stator 200 side tends to be stronger due to, for example, diffusion of magnetic flux on the side opposite the stator 200 in the axial direction AD. This can further improve the energy efficiency of the motor device 60.

[0301] According to this embodiment, the first rotor 300a and the second rotor 300b are arranged point-symmetrically with each other, so that the pair of inner axial magnets 312a, 312b of one rotor and the pair of outer axial magnets 313a, 313b of the other rotor are aligned in the axial direction AD. With this configuration, magnetic flux passing through the stator 200 in the axial direction AD tends to concentrate on the inner boundary portion BI and the outer boundary portion BO in the circumferential direction CD. This allows the magnetic field on the stator 200 side to be strengthened.

[0302] According to the present embodiment, the fixed block 330 fixes the magnet 310 to the magnet holder 320 such that the block tapered surface 330a overlaps the inner peripheral tapered surface 316d and such that the block tapered surface 330a sandwiches the magnet 310 between the magnet holder 320 and the magnet tapered surface 330a. In this configuration, the magnet 310 can be firmly fixed to the magnet holder 320 by the fixed block 330 by utilizing the fact that the block tapered surface 330a and the inner peripheral tapered surface 316d are inclined with respect to the motor axis Cm.

[0303] According to this embodiment, the multiple magnet units 316 arranged in the circumferential direction CD in the rotor 300 include an inclined magnet unit 317 and a parallel magnet unit 318. In this configuration, in the manufacturing process of the rotor 300, an operator can insert the parallel magnet unit 318 between two inclined magnet units 317 adjacent to each other in the circumferential direction CD as the last magnet unit 316 to be arranged in the magnet holder 320. This allows all the magnet units 316 to be properly fixed to the magnet holder 320.

[0304] According to this embodiment, a pressing force F3 is applied to the rotor 300 on the side opposite to the magnet 310 via the rim tip portion 344a serving as a fulcrum in the radial direction RD so that a bending stress F2 is generated in the rotor 300 against the attractive force F1 to the magnet 310. In this configuration, the holder fixture 350 can prevent the rotor 300 from being deformed in a warped manner due to the peripheral portion of the magnet 310 approaching the stator 200. This can prevent the deformation of the rotor 300 from causing problems such as a decrease in the efficiency of the motor 61.

[0305] According to this embodiment, the portion of the rotor 300 to which the holder fixture 350 is fixed is separated in the axial direction AD from the portion of the shaft flange 342 to which the holder fixture 350 is fixed. Therefore, even if the pressing force F3 is insufficient relative to the suction force F1, the insufficiency of the pressing force F3 can be resolved by increasing the pressing force F3 with the holder fixture 350.

[0306] According to this embodiment, the holder fixing hole 325 in the first rotor 300a, into which the first holder fixing device 350a is inserted, and the holder fixing hole 325 in the second rotor 300b, into which the second holder fixing device 350b is inserted, are positioned apart in the circumferential direction CD. With this configuration, it is not necessary to insert both the first holder fixing device 350a and the second holder fixing device 350b into a single hole in the shaft flange 342 from opposite sides in the axial direction AD. Therefore, it is not necessary to make the shaft flange 342 thick enough to allow both the first holder fixing device 350a and the second holder fixing device 350b to be inserted into a single hole. This makes it possible to reduce the thickness and weight of the shaft flange 342.

[0307] <Composition group C> According to this embodiment, the coil protection part 250 is provided in a state overlapping the inner peripheral surface 70b of the motor housing 70. With this configuration, heat from the coil 211 is easily transferred to the motor housing 70 via the coil protection part 250. Furthermore, the motor housing 70 is provided with motor fins 72 on the outer peripheral surface 70a. Therefore, heat transferred from the coil protection part 250 to the motor housing 70 is easily dissipated to the outside by the motor fins 72. This improves the heat dissipation effect of the motor device 60.

[0308] According to this embodiment, the coil protection portion 250 is positioned between the multiple stator holding portions 171 from the radially inner side. In this configuration, the contact area between the coil protection portion 250 and the inner circumferential surface 70b can be increased by the stator holding portions 171. This makes it easier for heat to be transferred from the coil protection portion 250 to the stator holding portions 171, thereby improving the heat dissipation effect of the motor housing 70.

[0309] According to this embodiment, the coil portion 215 and the shaft holder 174 face each other in the radial direction RD. With this configuration, the distance between the coil portion 215 and the motor housing 70 in the radial direction RD can be reduced by the shaft holder 174. That is, the thickness dimension of the coil protection portion 250 that exists between the coil portion 215 and the shaft holder 174 in the radial direction RD can be reduced. This makes it less likely that heat transferred from the coil portion 215 to the motor housing 70 will remain in the coil protection portion 250. This makes it possible to prevent the coil protection portion 250 from reducing the heat dissipation effect of the motor housing 70.

[0310] According to this embodiment, the coil protection part 250 overlaps at least the housing rough surface 177. In this configuration, the coil protection part 250 easily adheres to the housing rough surface 177, and therefore heat is easily transferred from the coil protection part 250 to the motor housing 70. In addition, in this configuration, the contact area between the coil protection part 250 and the housing rough surface 177 is easily increased, and therefore heat is easily transferred from the coil protection part 250 to the motor housing 70. Therefore, the housing rough surface 177 can improve the heat dissipation effect of the motor housing 70.

[0311] According to this embodiment, the grommet 255 that protects the power lead-out wire 212 fills the gap between the power lead-out wire 212 and the coil protection part 250. In this configuration, the grommet 255 can prevent the power lead-out wire 212 from being bent or deformed at the boundary between the buried part 255a and the exposed part 255b. Furthermore, when the coil protection part 250 is resin-molded during the manufacture of the motor device 60, the grommet 255 can prevent molten resin from leaking from around the power lead-out wire 212.

[0312] According to the present embodiment, the bobbin 240 has electrical insulation properties, and therefore the bobbin 240 can optimize the electrical insulation state for the coil 211. This makes it possible to suppress the occurrence of partial discharge in the coil 211. Furthermore, since the heat of the core 231 is released to the coil protection part 250 via the bobbin 240, the heat dissipation effect of the core unit 230 can be improved.

[0313] According to this embodiment, the coil protection part 250 is overlapped with at least the bobbin rough surface 247. In this configuration, the coil protection part 250 is likely to adhere closely to the bobbin rough surface 247, and therefore heat is likely to be transferred from the bobbin 240 to the coil protection part 250. In addition, in this configuration, the contact area between the coil protection part 250 and the bobbin rough surface 247 is likely to be large, and therefore heat is likely to be transferred from the bobbin 240 to the coil protection part 250. Therefore, the bobbin rough surface 247 can enhance the heat dissipation effect of the motor device 60.

[0314] According to this embodiment, the core width of the core 231 decreases stepwise toward the inside in the radial direction. In this configuration, the surface area of ​​the core 231 is likely to be larger and the core 231 is likely to adhere to the bobbin 240 more easily than in a configuration in which the core width decreases continuously. This makes it easier for heat from the core 231 to be transferred to the bobbin 240. Furthermore, when manufacturing the core 231 by stacking multiple core forming plate materials 236, the type of core forming plate material 236 can be limited according to the number of stages in which the core width decreases. This makes it possible to prevent an increase in the cost of manufacturing the core forming plate material 236.

[0315] According to this embodiment, the flange inner plate surface 243 of the bobbin 240 is provided with a recessed flange recess 243a for leading out the power lead wire 212 from the coil 211. With this configuration, dead space is less likely to occur between the flange inner plate surface 243 and the coil 211 on the side opposite the flange recess 243a across the bobbin body portion 241 in the circumferential direction CD. This makes it possible to increase the space factor of the coil 211 in the bobbin 240.

[0316] <Configuration group D> According to this embodiment, the inverter 81, and the rotor 300 and stator 200 arranged in the axial direction AD are housed in the unit housing 51. With this configuration, the motor device 60 can be made thinner and the motor device unit 50 can be made smaller. Furthermore, the motor fins 72 and inverter fins 92 are provided on the outer peripheral surface of the unit housing 51. Therefore, the motor fins 72 and the inverter fins 92 can improve the heat dissipation effect of the motor device unit 50. Therefore, it is possible to achieve both a smaller size of the motor device unit 50 and an improved heat dissipation effect.

[0317] According to this embodiment, the coil protection part 250 is superimposed on the inner peripheral surface of the unit housing 51. With this configuration, heat from the coil 211 is easily transferred to the unit housing 51 via the coil protection part 250. Furthermore, the motor fins 72 and the inverter fins 92 are provided on the outer peripheral surface of the unit housing 51. Therefore, the heat transferred from the coil protection part 250 to the unit housing 51 is easily dissipated to the outside by the motor fins 72 and the inverter fins 92. This improves the heat dissipation effect of the motor device unit 50.

[0318] According to this embodiment, the stator 200 and the rotor 300 are aligned in the axial direction AD, thereby reducing the thickness of the motor housing 70, and the motor housing 70 and the inverter housing 90 are aligned in the axial direction AD in the unit housing 51. Therefore, by reducing the thickness of the motor housing 70, it is possible to prevent the motor device unit 50 from becoming larger in the axial direction AD.

[0319] According to this embodiment, the flange vent holes 346 provided in the shaft flange 342 penetrate the rim 344 in the radial direction RD, allowing ventilation in the radial direction RD. In this configuration, heat from the stator 200 is easily released in the radial direction RD through the flange vent holes 346. Therefore, the flange vent holes 346 can enhance the heat dissipation effect of the motor device 60.

[0320] According to this embodiment, the holder adjustment holes 326 for adjusting the balance of the rotor 300 penetrate the rotor 300 in the axial direction AD, allowing ventilation in the axial direction AD. With this configuration, heat from the stator 200 is easily released in the axial direction AD through the holder adjustment holes 326. Therefore, the heat dissipation effect of the motor device 60 can be improved by utilizing the holder adjustment holes 326 for adjusting the balance of the rotor 300.

[0321] According to the present embodiment, the signal wiring 426 extending from the resolver 421 and the signal wiring 436 extending from the temperature sensor 431 are collected in the signal terminal block 440. In this configuration, the inverter wiring of the inverter device 80 is drawn into the signal terminal block 440, so that it can be electrically connected to both the resolver 421 and the temperature sensor 431. This reduces the workload of an operator who connects the signal wiring of the motor device 60 to the signal wiring of the inverter device 80 during the manufacture of the motor device 60.

[0322] According to this embodiment, the dustproof cover 380 covers the frame opening 373. Therefore, while realizing a configuration in which the power lead-out wire 212 is drawn out from the frame opening 373, the dustproof cover 380 can prevent foreign matter from passing through this frame opening 373.

[0323] According to this embodiment, in the motor housing 70, the connecting flange 74 protruding from the housing main body 71 is provided with a flange hole 74a. This prevents the rigidity of the housing main body 71 from being reduced by the flange hole 74a. Furthermore, the fixing flange 178 protruding from the housing main body 71 is provided with a flange hole 178a. This prevents the rigidity of the housing main body 71 from being reduced by the flange hole 178a.

[0324] According to this embodiment, the first fixing holes 392a and the second fixing holes 392b are aligned in the radial direction RD in the drive frame 390. With this configuration, the stress applied to the first fixing holes 392a from the motor housing 70 and the stress applied to the second fixing holes 392b from the reducer 53 tend to cancel each other out. This makes it possible to prevent abnormalities such as deformation of the drive frame 390 caused by the stress from the motor housing 70 and the stress from the reducer 53.

[0325] <Composition group O> According to this embodiment, the motor fins 72 serving as heat dissipation promoters are provided radially outside the stator coil 211. This allows the motor fins 72 to provide a cooling effect to the motor device 60 from the radial outside of the stator coil 211. Furthermore, the bus bar sensor 431A, which is the temperature sensor 431, is provided on the opposite side of the stator coil 211 from the motor fins 72. This configuration makes it less likely that the cooling effect of the motor fins 72 will cause the detected temperature of the bus bar sensor 431A to be lower than the actual coil temperature. In other words, it is less likely that a difference will occur between the detected temperature of the bus bar sensor 431A and the actual coil temperature. This allows the motor device 60 to improve the cooling effect and the detection accuracy of the coil temperature.

[0326] For example, consider a comparative configuration in which, unlike the present embodiment, the temperature sensor 431 is provided on the outer periphery of the stator coil 211 together with the motor fins 72. In this comparative configuration, heat from the stator coil 211 is transferred to the motor fins 72 through a heat dissipation path that extends radially outward, and is then released from the motor fins 72 to the outside.

[0327] In the comparative configuration, the temperature sensor 431 is located in the heat dissipation path radially outside the stator coil 211. Therefore, the temperature sensor 431 is likely to be cooled by heat dissipation from the motor fins 72. That is, the temperature measurement portion of the motor device 60 where the temperature is measured by the temperature sensor 431 is likely to be cooled. When the temperature measurement portion is cooled, the temperature difference between the maximum temperature portion of the motor device 60, which is the highest temperature, and the temperature measurement portion is likely to become large. In this way, if the heat dissipation by the motor fins 72 has a large effect on the temperature sensor 431, there is a concern that the accuracy of temperature measurement by the temperature sensor 431 will deteriorate. When the stator coil 211 is a heat source in the motor device 60, the portion on the opposite side of the stator coil 211 from the motor fins 72 is likely to become the maximum temperature portion.

[0328] In contrast to this comparative configuration, in this embodiment, bus bar sensor 431A is provided on the opposite side of the heat dissipation path across stator coil 211. This configuration can prevent bus bar sensor 431A from being cooled due to heat dissipation from motor fins 72. This makes it difficult for the temperature difference between the maximum temperature location and the temperature measurement location to become large. In other words, the temperature difference between the maximum temperature location and the temperature measurement location tends to be small, and the influence of heat dissipation by motor fins 72 on bus bar sensor 431A is reduced. This can improve the accuracy of temperature measurement by bus bar sensor 431A.

[0329] In this embodiment, the neutral point bus bar 290 is electrically connected to the stator coil 211. In this configuration, heat generated in the stator coil 211 is easily transferred to the neutral point bus bar 290. Therefore, the temperature difference between the neutral point bus bar 290 and the stator coil 211 is likely to be small. Therefore, according to this embodiment, the bus bar sensor 431A, which is the temperature sensor 431, is provided on the neutral point bus bar 290. Therefore, the bus bar sensor 431A can detect the temperature of the stator coil 211 via the neutral point bus bar 290. Therefore, it is possible to suppress a decrease in the detection accuracy of the bus bar sensor 431A due to the cooling effect of the motor fins 72, and further reduce the difference between the detected temperature of the bus bar sensor 431A and the actual coil temperature.

[0330] Furthermore, since the temperature sensor 431 is fixed to the neutral point bus bar 290, it is easy to firmly fix the temperature sensor 431 to the neutral point bus bar 290. The neutral point bus bar 290 tends to have a higher degree of freedom in terms of shape and position compared to the coil section 215. For example, even if the sensor support section 292 for fixing the temperature sensor 431 is provided on the neutral point bus bar 290, the magnetic field generated by the motor 61 is unlikely to be weakened. Therefore, by fixing the temperature sensor 431 to the sensor support section 292, it is easy to realize a configuration in which the temperature sensor 431 is firmly fixed to the neutral point bus bar 290.

[0331] In this embodiment, the stator coil 211 is protected by the thermally conductive coil protection part 250. In this configuration, heat generated in the stator coil 211 is easily transferred directly to the coil protection part 250. This tends to reduce the temperature difference between the coil protection part 250 and the stator coil 211. Therefore, in this embodiment, the busbar sensor 431A is embedded in the coil protection part 250. This allows the temperature sensor 431 to detect the temperature of the stator coil 211 via the coil protection part 250. This prevents a decrease in the detection accuracy of the temperature sensor 431 due to the cooling effect of the motor fins 72, and further reduces the difference between the temperature detected by the temperature sensor 431 and the actual coil temperature by the coil protection part 250.

[0332] Furthermore, temperature sensor 431 is fixed to stator coil 211 via coil protection part 250. In this configuration, coil protection part 250 can suppress the tendency of temperature sensor 431 to vibrate more easily than stator coil 211. In other words, coil protection part 250 can suppress the vibration of temperature sensor 431 relative to stator coil 211. Therefore, the strength reliability of temperature sensor 431 against vibration can be improved.

[0333] According to this embodiment, the temperature signal wiring 436 is provided so as to pass through two coil bodies 900 adjacent to each other in the circumferential direction CD and extend in the radial direction RD. With this configuration, it is not necessary to pass the temperature signal wiring 436 through a position offset in the axial direction AD from the coil body 900. That is, it is not necessary to pass the temperature signal wiring 436 through the gaps G1, G2 (see FIG. 12 ) between the stator coil 211 and the rotor 300. This makes it possible to prevent inconveniences that would otherwise occur if the temperature signal wiring 436 were to pass through the gaps G1, G2.

[0334] For example, this disadvantage can occur when the temperature signal wiring 436 comes into contact with the rotors 300a, 300b, causing abnormalities in the rotation of the rotors 300a, 300b. Furthermore, if the gaps G1, G2 are widened in the axial direction AD so that the temperature signal wiring 436 does not come into contact with the rotors 300a, 300b, the output of the motor 61 can be reduced. In contrast, in this embodiment, the temperature signal wiring 436 does not need to pass through the gaps G1, G2, so the temperature signal wiring 436 is less likely to come into contact with the rotors 300a, 300b. This can prevent abnormalities in the rotation of the rotors 300a, 300b and a reduction in the performance of the motor 61 due to the widening of the gaps G1, G2.

[0335] According to the present embodiment, the temperature signal wiring 436 is fixed to one of the two coil bodies 900 adjacent to each other in the circumferential direction CD. In this configuration, the fixed portion between the temperature signal wiring 436 and the coil body 900 can prevent the temperature signal wiring 436 from unintentionally moving relative to the coil body 900. Therefore, the temperature signal wiring 436 can be prevented from unintentionally entering the gaps G1, G2, for example, when molding the coil protection part 250 in the manufacturing process of the motor device 60.

[0336] According to this embodiment, the temperature signal wiring 436 extends in the radial direction RD through a position in one of the two coil bodies 900 where it is inserted between the pair of bobbin flanges 242. This configuration makes it easy to fix the temperature signal wiring 436 to one of the two coil bodies 900. Moreover, even if the temperature signal wiring 436 moves in the axial direction AD relative to the coil body 900, the bobbin flanges 242 can prevent the temperature signal wiring 436 from entering the gaps G1, G2.

[0337] According to this embodiment, the motor fins 72 are provided radially outward from the stator coil 211, while the bus bar sensor 431A is provided radially inward from the stator coil 211. This makes it possible to realize a configuration in which the stator coil 211 is cooled from the radially outward, while minimizing the difference between the temperature detected by the bus bar sensor 431A and the actual coil temperature.

[0338] Second Embodiment In the second embodiment, the motor device 60 has only one rotor 300. That is, the motor device 60 is a single-rotor rotating electric machine. For example, one rotor 300 is provided between the stator 200 and the inverter device 80 in the axial direction AD. Note that the one rotor 300 may be provided on the opposite side of the stator 200 from the inverter device 80 in the axial direction AD.

[0339] Furthermore, the motor device 60 may have a plurality of stators 200. For example, the motor device 60 may have two stators 200. This motor device 60 is a double-stator type rotating electric machine. The motor device 60 and the inverter device 80 may be provided apart from each other. For example, the motor housing 70 and the inverter housing 90 may be provided independently from each other. Furthermore, the unit duct 100 may not be provided for the motor device unit 50.

[0340] <Third embodiment> In the first embodiment, the temperature sensor 431 is provided in the neutral point bus bar 290, which serves as a current-carrying bus bar. In contrast, in the third embodiment, the temperature sensor 431 is provided in a coil. The configurations, actions, and effects of the third embodiment that are not specifically described are the same as those of the first embodiment. The third embodiment will be described mainly focusing on the differences from the first embodiment.

[0341] As shown in FIG. 91 , the temperature sensor 431 is provided in the stator coil 211. That is, the temperature sensor 431 is provided in the coil portion 215. The temperature sensor 431 provided in the coil portion 215 is sometimes referred to as a coil sensor 431B. The coil sensor 431B is fixed to the coil portion 215 with an adhesive or the like. The coil sensor 431B is fixed to the coil wire 220 that forms the coil portion 215. The coil sensor 431B is directly fixed to the stator coil 211. A plurality of coil sensors 431B are arranged in the circumferential direction CD. The plurality of coil sensors 431B are fixed to different coil portions 215. The coil sensor 431B detects the temperature of the coil portion 215 as the coil temperature. The coil sensor 431B is in contact with the coil portion 215. The coil sensor 431B corresponds to a temperature detection unit and a coil detection unit.

[0342] The coil sensor 431B is provided on the inner periphery side of the stator coil 211. For example, the coil sensor 431B is fixed to the coil inner periphery surface 211d. The coil sensor 431B is embedded in the coil protection part 250. The coil sensor 431B is fixed to the stator coil 211 by the coil protection part 250 in addition to an adhesive or the like. The coil sensor 431B corresponds to an inner periphery detection part and an embedded detection part, similar to the busbar sensor 431A of the first embodiment.

[0343] Coil sensor 431B is provided at a position that does not protrude from coil body 900 in the axial direction AD. Coil sensor 431B is fixed to coil body outer peripheral surface 903. Coil sensor 431B is provided between a pair of coil body end faces 902 in the axial direction AD. Coil sensor 431B is provided between a pair of bobbin flanges 242 in the axial direction AD. For example, coil sensor 431B is provided at a position separated from both of the pair of bobbin flanges 242 in the axial direction AD.

[0344] A temperature signal wiring 436 is communicatively connected to the coil sensor 431B. The temperature signal wiring 436 connected to the coil sensor 431B is a passing signal wiring 436A, as in the first embodiment. However, in this embodiment, the passing signal wiring 436A does not pass through the inside of the flange recess 243a.

[0345] 92 and 93, the passing signal line 436A extends in the radial direction RD between a pair of bobbin flanges 242, passing through positions spaced apart from each of the bobbin flanges 242 in the axial direction AD. In the coil portion 215, a plurality of coil wires 220 are wound so as to extend in a direction perpendicular to the axial direction AD and are arranged side by side in the axial direction AD. The passing signal line 436A is inserted between two coil wires 220 adjacent to each other in the axial direction AD in the coil portion 215. The passing signal line 436A is fixed to the coil portion 215 by a coil protection part 250 in addition to an adhesive or the like.

[0346] According to this embodiment, the coil sensor 431B, which is the temperature sensor 431, is provided in the stator coil 211. Therefore, the coil sensor 431B can directly detect the temperature of the stator coil 211. Therefore, it is possible to suppress a decrease in the detection accuracy of the coil sensor 431B due to the cooling effect of the motor fins 72, and further to reduce the difference between the temperature detected by the coil sensor 431B and the actual coil temperature.

[0347] <Fourth embodiment> In the third embodiment, the temperature sensor 431 is provided in the stator coil 211 as a coil. In contrast, in the fourth embodiment, the temperature sensor 431 is provided in a coil lead wire. The configurations, actions, and effects not specifically described in the fourth embodiment are the same as those in the first embodiment. The fourth embodiment will be described mainly focusing on the differences from the first embodiment.

[0348] As shown in Fig. 94, the neutral lead wire 213 is led out from the coil portion 215, and is thereby led out from the stator coil 211. The neutral lead wire 213 is led out radially inward from the coil portion 215. In the stator 200, one coil portion 215 and the neutral lead wire 213 led out from this coil portion 215 are formed by a common coil wire 220. The neutral lead wire 213 corresponds to a coil lead wire.

[0349] The temperature sensor 431 is provided on the neutral lead wire 213. The temperature sensor 431 provided on the neutral lead wire 213 may be referred to as a lead sensor 431C. The lead sensor 431C is fixed to the neutral lead wire 213 with an adhesive or the like. The lead sensor 431C is provided on the neutral lead wire 213, and is therefore provided on the first extension wire 216 that forms the neutral lead wire 213. A plurality of lead sensors 431C are arranged in the circumferential direction CD. The plurality of lead sensors 431C are fixed to different neutral lead wires 213. The lead sensor 431C detects the temperature of the neutral lead wire 213 as a coil temperature. The lead sensor 431C is in contact with the neutral lead wire 213. The lead sensor 431C corresponds to a temperature detection unit and a lead detection unit. The lead-out sensor 431C may be fixed to a plurality of neutral lead-out wires 213.

[0350] The lead-out sensor 431C is provided on the inner periphery side of the stator coil 211. The lead-out sensor 431C is embedded in the coil protection part 250. The lead-out sensor 431C is fixed to the neutral lead wire 213 not only by adhesive or the like but also by the coil protection part 250. The lead-out sensor 431C corresponds to an inner periphery detection part and an embedded detection part, similar to the busbar sensor 431A of the first embodiment.

[0351] The pull-out sensor 431C is provided at a position that does not protrude from the coil body 900 in the axial direction AD. The pull-out sensor 431C is provided between a pair of coil body end faces 902 in the axial direction AD. The pull-out sensor 431C is provided between a pair of bobbin flanges 242 in the axial direction AD.

[0352] According to the present embodiment, the neutral lead wire 213 is led out from the stator coil 211. In this configuration, heat generated in the stator coil 211 is easily transferred directly to the neutral lead wire 213. This makes it easy to reduce the temperature difference between the neutral lead wire 213 and the stator coil 211. Therefore, according to the present embodiment, the lead sensor 431C, which is the temperature sensor 431, is provided on the neutral lead wire 213. This allows the lead sensor 431C to detect the temperature of the stator coil 211 via the neutral lead wire 213. This prevents a decrease in the detection accuracy of the lead sensor 431C due to the cooling effect of the motor fins 72, and further reduces the difference between the temperature detected by the lead sensor 431C and the actual coil temperature.

[0353] Fifth Embodiment In the first embodiment, the temperature signal wiring 436 extends in the radial direction RD as a passing signal line 436A through a position in one coil body 900 where it is inserted between a pair of bobbin flanges 242. In contrast, in the fifth embodiment, the temperature signal wiring 436 extends in the radial direction RD through a gap between two coil bodies 900 adjacent in the circumferential direction CD. The configurations, actions, and effects of the fifth embodiment that are not particularly described are the same as those of the first embodiment. The fifth embodiment will be described mainly focusing on the differences from the first embodiment.

[0354] As shown in FIG. 95, there is a gap between two coil bodies 900 adjacent in the circumferential direction CD. The gap between the two coil bodies 900 is the gap between the coil body outer surfaces 903 of the two coil bodies 900. The temperature signal wiring 436 extends radially outward from the temperature sensor 431 through the gap between the two coil bodies 900. The temperature signal wiring 436 passing through the two coil bodies 900 is sometimes referred to as a gap signal line 436B. The gap signal line 436B extends in the radial direction RD, for example, passing between the coil portions 215 of the two coil bodies 900. The gap signal line 436B extends in the radial direction RD so as not to enter between the pair of bobbin flanges 242 in one coil body 900. In the gap signal line 436B, the crossing line portion 437 does not enter between the pair of bobbin flanges 242. The gap signal line 436B corresponds to a temperature communication line.

[0355] 96, the gap signal wire 436B is provided between the pair of coil body end faces 902 in the axial direction AD. The gap signal wire 436B does not protrude from the pair of coil body end faces 902 in the axial direction AD. The gap signal wire 436B is fixed to at least one of the coil portion 215 and the bobbin flange 242 with an adhesive or the like. In addition to the adhesive or the like, the gap signal wire 436B is also fixed to at least one of the coil portion 215 and the bobbin flange 242 by the coil protection part 250.

[0356] Sixth Embodiment In the first embodiment, the temperature sensor 431 is provided radially inside the stator coil 211. In contrast, in the sixth embodiment, the temperature sensor 431 is provided radially outside the stator coil 211. The configurations, actions, and effects of the sixth embodiment that are not particularly described are the same as those of the first embodiment. The sixth embodiment will be described mainly focusing on the differences from the first embodiment.

[0357] As shown in FIG. 97, a cooling device 550 is provided for the motor device 60. The cooling device 550 is included in, for example, the motor device unit 50. The cooling device 550 is a cooling system that cools the motor device unit 50 using a refrigerant. A fluid such as a coolant is used as the refrigerant. A cooling method that uses a refrigerant is sometimes called a liquid-cooling method. In this embodiment, both an air-cooling method and a liquid-cooling method are used as the cooling method for the motor device unit 50.

[0358] Cooling device 550 has inner circumferential heat absorption portion 551, refrigerant pump 552, and refrigerant flow path 553. In cooling device 550, refrigerant flows through refrigerant flow path 553. Refrigerant flow path 553 is, for example, a circulation flow path that circulates the refrigerant. Refrigerant pump 552 pumps the refrigerant in refrigerant flow path 553 so that the refrigerant flows through refrigerant flow path 553. Refrigerant pump 552 is a circulation pump that circulates the refrigerant through refrigerant flow path 553. Refrigerant pump 552 is connected to, for example, shaft 340, and flows the refrigerant through refrigerant flow path 553 in conjunction with the driving of motor 61, for example. Note that refrigerant pump 552 may be configured to be driven independently of motor 61.

[0359] The refrigerant flow path 553 has a heat absorption path 555 and a heat radiation path 556. The heat absorption path 555 is a portion in the refrigerant flow path 553 where the refrigerant absorbs heat from an object to be cooled. The object to be cooled is at least a part of the motor device 60, for example, the stator coil 211. The heat radiation path 556 is a portion in the refrigerant flow path 553 where the refrigerant releases heat to the outside. The heat radiation path 556 is provided, for example, outside the motor device 60, and is capable of releasing the heat of the refrigerant to the outside air, etc.

[0360] The inner circumferential heat absorption portion 551 forms a heat absorption path 555. The inner circumferential heat absorption portion 551 is provided radially inside the stator coil 211. The inner circumferential heat absorption portion 551 extends in the circumferential direction CD along the coil inner circumferential surface 211d. The inner circumferential heat absorption portion 551 extends annularly in the circumferential direction CD. The inner circumferential heat absorption portion 551 is located at a position spaced radially inward from the stator coil 211. The inner circumferential heat absorption portion 551 is provided between the shaft main body 341 and the coil protection portion 250 in the radial direction RD.

[0361] In the inner heat absorption portion 551, the heat absorption path 555 extends along the coil inner circumferential surface 211d. For example, in the inner heat absorption portion 551, the heat absorption path 555 extends annularly in the circumferential direction CD. In the inner heat absorption portion 551, the refrigerant flows in the circumferential direction CD along the coil inner circumferential surface 211d. The inner heat absorption portion 551 absorbs heat from the stator coil 211. In the inner heat absorption portion 551, the refrigerant flowing through the heat absorption path 555 absorbs heat released from the coil inner circumferential surface 211d and the like. That is, the inner heat absorption portion 551 cools the stator coil 211 from the inner circumferential side of the stator coil 211.

[0362] The heat dissipation effect of the inner periphery heat absorption portion 551 on the stator coil 211 is greater than the heat dissipation effect of the motor fins 72 on the stator coil 211. In the stator coil 211, heat dissipation radially inward is greater than heat dissipation radially outward. In the stator coil 211, the amount of heat dissipated radially inward by the inner periphery heat absorption portion 551 per unit time is greater than the amount of heat dissipated radially outward by the motor fins 72 per unit time. In the stator coil 211, the amount of heat dissipated per unit area from the coil inner periphery surface 211d is greater than the amount of heat dissipated per unit area from the coil outer periphery surface 211c. The inner periphery heat absorption portion 551 promotes heat dissipation radially inward from the stator coil 211 so that heat dissipation radially inward from the stator coil 211 is greater than heat dissipation radially outward from the stator coil 211. The inner periphery heat absorption portion 551 corresponds to a heat dissipation promotion portion and an inner periphery promotion portion.

[0363] In a configuration in which heat dissipation portions such as motor fins 72 are provided only on the radially outer side or the radially inner side of the stator coil 211, as in the first embodiment, the heat dissipation portion corresponds to the heat dissipation promotion portion. In a configuration in which heat dissipation portions are provided both on the radially outer side and the radially inner side of the stator coil 211, as in this embodiment, the heat dissipation portion on the radially outer side or the heat dissipation portion on the radially inner side, whichever dissipates more heat, corresponds to the heat dissipation promotion portion. In a configuration in which the radially outer heat dissipation portion is the heat dissipation promotion portion, this heat dissipation portion corresponds to the outer circumference promotion portion. In a configuration in which the radially inner heat dissipation portion is the heat dissipation promotion portion, this heat dissipation portion corresponds to the inner circumference promotion portion. This embodiment is an example in which the radially inner heat dissipation portion corresponds to the inner circumference promotion portion.

[0364] The temperature sensor 431 is provided radially outside the stator coil 211. The temperature sensor 431 provided radially outside the stator coil 211 is sometimes referred to as an outer periphery sensor 431D. The outer periphery sensor 431D is provided between the stator coil 211 and the housing main body 71 in the radial direction RD. The outer periphery sensor 431D is fixed to the stator coil 211 with an adhesive or the like. The outer periphery sensor 431D is in contact with the stator coil 211. The outer periphery sensor 431D is fixed to, for example, the coil outer periphery surface 211c. The outer periphery sensor 431D is embedded in the coil protection part 250. The outer periphery sensor 431D is fixed to the stator coil 211 by the coil protection part 250 in addition to the adhesive or the like. The outer periphery sensor 431D corresponds to a temperature detection part, an embedded detection part, and an outer periphery detection part.

[0365] The temperature signal wiring 436 (not shown) is drawn out from the frame opening 373 so as to extend from the outer peripheral sensor 431D in the axial direction AD along the motor inner peripheral surface 70b. In this embodiment, the temperature signal wiring 436 does not cross the stator coil 211 in the radial direction RD. That is, the temperature signal wiring 436 has a lead-out portion 438 but does not have a crossing portion 437.

[0366] According to this embodiment, an inner circumferential heat absorption portion 551 serving as a heat dissipation promoting portion is provided radially inside the stator coil 211. Therefore, the inner circumferential heat absorption portion 551 can provide a cooling effect to the motor device 60 from the radial inside of the stator coil 211. Furthermore, the outer circumferential sensor 431D, which is the temperature sensor 431, is provided on the opposite side of the stator coil 211 from the inner circumferential heat absorption portion 551. With this configuration, it is unlikely that the cooling effect of the inner circumferential heat absorption portion 551 will cause the temperature detected by the outer circumferential sensor 431D to be lower than the actual coil temperature. In other words, a difference between the temperature detected by the outer circumferential sensor 431D and the actual coil temperature is unlikely to occur. Therefore, similar to the first embodiment, the motor device 60 can improve the cooling effect and the accuracy of coil temperature detection.

[0367] For example, a comparative configuration is assumed in which, unlike this embodiment, temperature sensor 431 is provided on the inner periphery of stator coil 211 together with inner periphery heat absorption portion 551. In this comparative configuration, heat from stator coil 211 is absorbed by inner periphery heat absorption portion 551 through a heat dissipation path extending radially inward, and is released to the outside via the refrigerant flowing through inner periphery heat absorption portion 551.

[0368] In the comparative configuration, temperature sensor 431 is located in the heat dissipation path radially inside stator coil 211. Therefore, temperature sensor 431 is likely to be cooled as heat is dissipated from stator coil 211 to inner circumferential heat absorption portion 551. If the influence of heat dissipation by inner circumferential heat absorption portion 551 on temperature sensor 431 is large, there is a concern that the accuracy of temperature measurement by temperature sensor 431 may deteriorate.

[0369] In contrast to this comparative configuration, in this embodiment, outer peripheral sensor 431D is provided on the opposite side of the heat dissipation path via stator coil 211. This configuration prevents outer peripheral sensor 431D from being cooled due to heat dissipation from stator coil 211 to inner peripheral heat absorption portion 551. This reduces the impact of heat dissipation from inner peripheral heat absorption portion 551 on outer peripheral sensor 431D. This improves the accuracy of temperature measurement by outer peripheral sensor 431D.

[0370] According to this embodiment, inner periphery heat absorption portion 551 is provided radially inside, while outer periphery sensor 431D is provided radially outside, relative to stator coil 211. Therefore, it is possible to realize a configuration in which inner periphery heat absorption portion 551 cools stator coil 211 from the radial inside, while minimizing the difference between the temperature detected by outer periphery sensor 431D and the actual coil temperature.

[0371] Seventh Embodiment In the first embodiment, the inner circumferential heat absorption portion 551 is provided as a liquid-cooled heat dissipation promotion portion on the radially inner side of the stator coil 211. In contrast, in the seventh embodiment, the liquid-cooled heat dissipation promotion portion is provided on the radially outer side of the stator coil 211, not on the radially outer side. The configurations, actions, and effects of the seventh embodiment that are not particularly described are the same as those of the first embodiment. The seventh embodiment will be described mainly focusing on the differences from the first embodiment.

[0372] 98, similarly to the sixth embodiment, a cooling device 550 is provided for a motor device 60. The cooling device 550 has the same configuration as that of the sixth embodiment. However, unlike the sixth embodiment, the cooling device 550 in this embodiment has an outer peripheral heat absorption portion 561 instead of an inner peripheral heat absorption portion 551.

[0373] The outer peripheral heat absorption portion 561 forms a heat absorption path 555. The outer peripheral heat absorption portion 561 is provided radially outside the stator coil 211. The outer peripheral heat absorption portion 561 extends in the circumferential direction CD along the coil outer peripheral surface 211c. The outer peripheral heat absorption portion 561 extends annularly in the circumferential direction CD. The outer peripheral heat absorption portion 561 is located radially outwardly away from the stator coil 211. For example, the outer peripheral heat absorption portion 561 is provided on the outer peripheral side of the housing main body 71. The outer peripheral heat absorption portion 561 is provided so as to overlap the motor outer peripheral surface 70a. In the motor housing 70, the outer peripheral heat absorption portion 561 is provided on the motor outer peripheral surface 70a instead of the motor fins 72.

[0374] In the outer circumferential heat absorption portion 561, the heat absorption path 555 extends along the coil outer circumferential surface 211c. For example, in the outer circumferential heat absorption portion 561, the heat absorption path 555 extends annularly in the circumferential direction CD. In the outer circumferential heat absorption portion 561, the refrigerant flows in the circumferential direction CD along the coil outer circumferential surface 211c. In the outer circumferential heat absorption portion 561, the refrigerant flowing through the heat absorption path 555 absorbs heat released from the coil outer circumferential surface 211c and the like. That is, the outer circumferential heat absorption portion 561 cools the stator coil 211 from the outer circumferential side of the stator coil 211.

[0375] In this embodiment, similarly to the first embodiment, the amount of heat dissipated radially inward from the stator coil 211 is greater than the amount of heat dissipated radially outward from the stator coil 211. The outer peripheral heat absorption portion 561 promotes heat dissipation radially outward from the stator coil 211 so that the amount of heat dissipated radially inward from the stator coil 211 is greater than the amount of heat dissipated radially outward from the stator coil 211. The outer peripheral heat absorption portion 561 corresponds to the heat dissipation promotion portion and the outer peripheral promotion portion.

[0376] As in the first embodiment, the temperature sensor 431 is provided radially inside the stator coil 211. That is, the temperature sensor 431 is provided on the opposite side of the stator coil 211 from the outer circumferential heat absorption portion 561. Therefore, according to this embodiment, it is unlikely that the temperature detected by the temperature sensor 431 will be lower than the actual coil temperature due to the cooling effect of the outer circumferential heat absorption portion 561. Therefore, in the motor device 60, the cooling effect can be improved while the accuracy of detecting the coil temperature by the temperature sensor 431 can be improved.

[0377] Note that the outer circumferential heat absorption portion 561 may be located on the inner circumferential side of the housing main body 71, as long as it is located radially outside the stator coil 211. For example, the outer circumferential heat absorption portion 561 may be located between the stator coil 211 and the housing main body 71 in the radial direction RD. Both the motor fins 72 and the outer circumferential heat absorption portion 561 may be provided in the motor housing 70.

[0378] Eighth Embodiment In the sixth embodiment, the inner circumferential heat absorption portion 551 is provided radially inside the stator coil 211 as a liquid-cooled heat dissipation promotion portion. In contrast, in the eighth embodiment, an air-cooled heat dissipation promotion portion is provided radially inside the stator coil 211. The configurations, actions, and effects not specifically described in the eighth embodiment are the same as those in the first embodiment. In the eighth embodiment, the differences from the first embodiment will be mainly described.

[0379] As shown in FIG. 99, the motor device 60 has an inner circumferential cooling portion 571. The inner circumferential cooling portion 571 is provided radially inside the stator coil 211. The inner circumferential cooling portion 571 extends in the circumferential direction CD along the coil inner circumferential surface 211d. The inner circumferential cooling portion 571 extends in an annular shape in the circumferential direction CD. The inner circumferential cooling portion 571 is located at a distance radially inward from the stator coil 211.

[0380] The inner circumferential cooling section 571 has an inner circumferential cooling path 572. The inner circumferential cooling path 572 is the internal space of the inner circumferential heat dissipation path. The inner circumferential cooling section 571 is an air passage forming section that forms the inner circumferential cooling path 572. The inner circumferential cooling section 571 includes the shaft main body 341 and the coil protection section 250. In the inner circumferential cooling section 571, the inner circumferential cooling path 572 is formed by the outer peripheral surface of the shaft main body 341 and the inner peripheral surface of the coil protection section 250. Note that the coil protection section 250 is not shown in Figure 99.

[0381] In the inner circumferential cooling section 571, the inner circumferential cooling path 572 extends along the coil inner circumferential surface 211d. For example, in the inner circumferential cooling section 571, the inner circumferential cooling path 572 extends annularly in the circumferential direction CD. In the inner circumferential cooling section 571, a gas such as external air flows through the inner circumferential cooling path 572 as cooling air. The cooling air flows along the coil inner circumferential surface 211d in the circumferential direction CD and the axial direction AD. Heat from the stator coil 211 is released to the inner circumferential cooling section 571. In the inner circumferential cooling section 571, heat from the stator coil 211 is released to the cooling air flowing through the inner circumferential cooling path 572. The cooling air flowing through the inner circumferential cooling path 572 cools the stator coil 211. The inner circumferential cooling section 571 cools the stator coil 211 from the inner circumferential side of the stator coil 211 with the cooling air.

[0382] The heat dissipation effect of the inner periphery cooling portion 571 on the stator coil 211 is greater than the heat dissipation effect of the motor fins 72 on the stator coil 211. As in the sixth embodiment, the stator coil 211 dissipates more heat radially inward than radially outward. The inner periphery cooling portion 571 promotes heat dissipation from the stator coil 211 to the radially inward direction so that the heat dissipation from the stator coil 211 to the radially inward direction is greater than the heat dissipation from the stator coil 211 to the radially outward direction. The inner periphery cooling portion 571 corresponds to a heat dissipation promotion portion and an inner periphery promotion portion. This embodiment is an example in which heat dissipation portions are provided on both the radially outer and radially inner sides of the stator coil 211, and the radially inner heat dissipation portion serves as the heat dissipation promotion portion. The inner periphery cooling portion 571 is an air-cooled heat dissipation promotion portion.

[0383] Similar to the sixth embodiment, the temperature sensor 431 is provided radially outside the stator coil 211. That is, an outer periphery sensor 431D is provided radially outside the stator coil 211.

[0384] According to this embodiment, the inner periphery cooling unit 571 serving as a heat dissipation promoting unit is provided radially inside the stator coil 211. Therefore, the inner periphery cooling unit 571 can provide a cooling effect to the motor device 60 from the radial inside of the stator coil 211. Moreover, the outer periphery sensor 431D is provided on the opposite side of the stator coil 211 from the inner periphery cooling unit 571. This configuration can prevent the temperature detected by the outer periphery sensor 431D from becoming lower than the actual coil temperature due to the cooling effect of the inner periphery cooling unit 571. Furthermore, a configuration can be realized in which the inner periphery cooling unit 571 cools the stator coil 211 from the radial inside, while reducing the difference between the temperature detected by the outer periphery sensor 431D and the actual coil temperature.

[0385] Ninth Embodiment In the eighth embodiment, in a configuration in which heat dissipation portions are provided on both the radially outer and radially inner sides of the stator coil 211, the radially inner heat dissipation portion serves as a heat dissipation promotion portion. In contrast, in the ninth embodiment, in a configuration in which heat dissipation portions are provided on both the radially outer and radially inner sides of the stator coil 211, the radially outer heat dissipation portion serves as a heat dissipation promotion portion. The configuration, action, and effect of the ninth embodiment that are not particularly described are the same as those of the eighth embodiment. In the ninth embodiment, the differences from the eighth embodiment will be mainly described.

[0386] As shown in FIG. 100, the motor device 60 has an inner circumferential cooling portion 581 and an inner circumferential cooling path 582. The inner circumferential cooling portion 581 and the inner circumferential cooling path 582 are basically configured similarly to the inner circumferential cooling portion 571 and the inner circumferential cooling path 572 of the eighth embodiment. Unlike the eighth embodiment, the motor device 60 does not have a coil protection portion 250. That is, the stator coil 211 is not protected by the coil protection portion 250. Therefore, the inner circumferential cooling portion 581 includes the stator coil 211 instead of the coil protection portion 250. In the inner circumferential cooling portion 581, the inner circumferential cooling path 582 is formed by the coil inner circumferential surface 211d, etc.

[0387] In this embodiment, unlike the eighth embodiment, the heat dissipation effect of the motor fins 72 on the stator coil 211 is greater than the heat dissipation effect of the inner periphery cooling portion 581 on the stator coil 211. Therefore, in the stator coil 211, heat dissipation to the radially outward direction is greater than heat dissipation to the radially inward direction. As in the first embodiment, the motor fins 72 promote heat dissipation from the stator coil 211 to the radially outward direction so that heat dissipation from the stator coil 211 to the radially outward direction is greater than heat dissipation from the stator coil 211 to the radially outward direction. In this embodiment, even though the motor device 60 has the inner periphery cooling portion 581, the motor fins 72 correspond to the heat dissipation promotion portion and the outer periphery promotion portion.

[0388] As with the first embodiment, the temperature sensor 431 is a bus bar sensor 431A that is provided on the neutral point bus bar 290. In this embodiment, the bus bar sensor 431A is provided on the inner circumferential cooling portion 581. For example, the bus bar sensor 431A is housed in the inner circumferential cooling path 582.

[0389] <Other embodiments> The disclosure of this specification is not limited to the exemplified embodiments. The disclosure encompasses the exemplified embodiments and modifications thereto by those skilled in the art. For example, the disclosure is not limited to the combinations of parts and elements shown in the embodiments, and can be implemented in various modifications. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure encompasses the omission of parts and elements from the embodiments. The disclosure encompasses the substitution or combination of parts and elements between one embodiment and another embodiment. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope is defined by the claims, and should be interpreted as including all modifications within the meaning and scope equivalent to the claims.

[0390] <Composition group A> In each of the above embodiments, the bus bar unit 260 and the neutral point bus bar 290 only need to be spaced apart in at least one of the axial direction AD, the radial direction RD, and the circumferential direction CD. The power bus bar 261 does not need to be protected by the bus bar protector 270. Even in this configuration, if the neutral point bus bar 290 is provided in the stator-side space S1 and the power bus bar 261 is provided in the inverter-side space S2, the insulation reliability between the power bus bar 261 and the neutral point bus bar 290 is less likely to decrease. It is also sufficient that one of the power bus bar 261 and the neutral point bus bar 290 is provided in the stator-side space S1, and the other is provided in the inverter-side space S2.

[0391] <Composition group B> In each of the above embodiments, the pair of inner magnets 312a, 312b may be oriented so as to face opposite each other in the circumferential direction CD, provided that they are oriented so as to be inclined with respect to the motor axis Cm. The pair of outer magnets 313a, 313b may be oriented so as to face each other in the circumferential direction CD, provided that they are oriented so as to be inclined with respect to the motor axis Cm. The pair of inner magnets 312a, 312b and the pair of outer magnets 313a, 313b may be oriented so as to be inclined in the radial direction RD with respect to the motor axis Cm.

[0392] <Composition group C> In each of the above embodiments, the coil portion 215 may be disposed in the motor housing 70 regardless of the position of the stator holding portion 171. For example, the coil portion 215 may be provided at a position offset in the circumferential direction CD from the shaft holding portion 174. Furthermore, in the motor housing 70, as long as the coil protection portion 250 is in contact with the inner circumferential surface 70b, the stator holding portion 171 does not have to be provided on the inner circumferential surface 70b.

[0393] <Configuration group D> In each of the above embodiments, the motor device 60 and the inverter device 80 may share a housing. For example, the motor 61 and the inverter 81 may be accommodated in a single housing. Furthermore, it is sufficient that at least one of the motor fins 72 and the inverter fins 92 is provided in the unit housing 51. In the unit housing 51, the coil protection portion 250 may be provided at a position spaced apart from the inner circumferential surface 70b.

[0394] <Composition group O> In each of the above embodiments, a bus bar detection unit such as bus bar sensor 431A may be provided on a current-carrying bus bar such as neutral point bus bar 290. In motor device 60, power bus bar 261 also corresponds to a current-carrying bus bar electrically connected to stator coil 211. Therefore, in a configuration in which power bus bar 261 is provided in a position close to stator coil 211, a bus bar detection unit may be provided on power bus bar 261. For example, in the above first embodiment, the bus bar detection unit may be fixed to power bus bar 261 or bus bar main body 262.

[0395] In each of the above embodiments, a coil detector such as the coil sensor 431B may be provided in a coil such as the stator coil 211. That is, the coil detector may be provided in the coil portion 215. For example, in the above third embodiment, the coil detector may be fixed to the coil portion 215 on the radially outer side of the stator coil 211. Furthermore, the coil detector may be provided at a position interposed between two coil portions 215 adjacent to each other in the radial direction RD.

[0396] In each of the above embodiments, the lead-out detection unit such as the lead-out sensor 431C may be provided on a coil lead-out wire such as the neutral lead-out wire 213. In the motor device 60, the power lead-out wire 212, the first lead-out wire 216, and the second lead-out wire 217 also correspond to coil lead-out wires led out from the stator coil 211. For example, in the above fourth embodiment, the lead-out detection unit may be fixed to the first lead-out wire 216 or the second lead-out wire 217.

[0397] In each of the above embodiments, it is sufficient that the inner circumference detection unit such as the busbar sensor 431A is provided radially inside the stator coil 211. For example, in the above first embodiment, the inner circumference detection unit may be fixed somewhere in the coil unit 210 radially inside the stator coil 211. Also, the inner circumference detection unit may be fixed to the inner circumferential surface of the coil protection unit 250, the rear frame 370, or the drive frame 390. Furthermore, the inner circumference detection unit may be fixed to the bobbin 240.

[0398] In each of the above embodiments, an outer periphery detection unit such as the outer periphery sensor 431D may be provided radially outside the stator coil 211. For example, in the sixth embodiment, the outer periphery detection unit may be fixed to somewhere in the coil unit 210 radially outside the stator coil 211. For example, the outer periphery detection unit may be fixed to the coil body 900 or the power lead wire 212. The outer periphery detection unit may also be fixed to the outer periphery surface of the coil protection unit 250, the motor inner periphery surface 70b, the rear frame 370, or the drive frame 390. Furthermore, the outer periphery detection unit may be fixed to the bobbin 240. In addition, in a configuration in which the neutral point bus bar 290 is provided radially inside the stator coil 211, the outer periphery detection unit may be provided in the neutral point bus bar 290.

[0399] In each of the above embodiments, a temperature detection unit such as the temperature sensor 431 may be provided at any position in the axial direction AD with respect to the stator coil 211. For example, in the above first embodiment, the bus bar sensor 431A may be provided on the rear frame 370 side in the axial direction AD with respect to the stator coil 211. In this configuration, the neutral point bus bar 290 may also be provided on the rear frame 370 side in the axial direction AD with respect to the stator coil 211.

[0400] In each of the above embodiments, a temperature detection unit such as the temperature sensor 431 may be provided at a position shifted in the radial direction RD from the stator coil 211. For example, a part of the temperature detection unit may protrude from the stator coil 211 in the radial direction RD.

[0401] In each of the above embodiments, the radially outer heat dissipation portion, such as the motor fins 72, does not have to be provided on the motor outer peripheral surface 70a. That is, in a configuration in which the heat dissipation promotion portion is provided as an outer peripheral promotion portion on the radially outer side of the stator coil 211, the outer peripheral promotion portion may be provided on the radially inner side of the motor outer peripheral surface 70a. For example, in the seventh embodiment, the outer peripheral heat absorption portion 561 may be built into the housing main body 71. In this configuration, the outer peripheral heat absorption portion 561 is provided between the motor outer peripheral surface 70a and the motor inner peripheral surface 70b. Alternatively, the outer peripheral heat absorption portion 561 may be provided inside the motor housing 70, between the stator coil 211 and the motor inner peripheral surface 70b.

[0402] In each of the above embodiments, a radially inner heat dissipation portion such as inner periphery heat absorption portion 551 may be provided on shaft 340. That is, in a configuration in which a heat dissipation promotion portion is provided as an inner periphery promotion portion on the radially inner side of stator coil 211, the inner periphery promotion portion may be provided on shaft 340. For example, in the above sixth embodiment, heat absorption path 555 may be provided inside shaft 340. In this configuration, the portion of shaft 340 that forms heat absorption path 555 is inner periphery heat absorption portion 551. In shaft 340, shaft main body 341, shaft flange 342, or the like may serve as inner periphery heat absorption portion 551.

[0403] <Composition group A> In motors such as axial gap motors, there is a concern that the insulation reliability of the electrical insulation state between the power bus bar and the neutral bus bar may decrease. In response to this, a rotating electric machine is provided that can improve the electrical insulation reliability.

[0404] According to feature A1, the neutral point bus bar (290) is provided at a position spaced apart from the bus bar protector (270) that has electrical insulation and protects the power bus bar (261). With this configuration, the neutral point bus bar (290) and the power bus bar (261) are not in contact with each other, and even the neutral point bus bar (290) and the bus bar protector (270) are not in contact with each other. Therefore, the separation between the neutral point bus bar (290) and the bus bar protector (270) can prevent a decrease in the reliability of the electrical insulation between the neutral point bus bar (290) and the power bus bar (261). Therefore, the separation between the neutral point bus bar (290) and the bus bar protector (270) can improve the reliability of the electrical insulation of the rotating electric machine (60).

[0405] According to feature A10, a power bus bar (261) is provided in one of a first space (S1) and a second space (S2) aligned in the axial direction (AD), and a neutral bus bar (290) is provided in the other. Furthermore, the first space (S1) and the second space (S2) are separated by a space partition (370). In this configuration, the space partition (370) prevents the neutral bus bar (290) from contacting the power bus bar (261). In this manner, the space partition (370) can prevent a decrease in the reliability of the electrical insulation between the neutral bus bar (290) and the power bus bar (261). Therefore, the space partition (370) can improve the reliability of the electrical insulation of the rotating electric machine (60).

[0406] [Feature A1] A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a plurality of phase coils (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; a power bus bar (261) electrically connected to the coil and supplying power to the coil; a bus bar protection portion (270) having electrical insulation properties and protecting the power bus bar; a neutral bus bar (290) provided at a position spaced from the bus bar protection portion and electrically connected to a neutral point (65) side of each of the coils of the plurality of phases; A rotating electric machine comprising:

[0407] [Feature A2] a space partitioning portion (370) extending in a direction perpendicular to the rotation axis and partitioning a first space (S1) accommodating a stator and a second space (S2) not accommodating a stator such that the first space and the second space are aligned along the rotation axis; The rotating electric machine according to feature A1, wherein a power bus bar is provided in one of the first space and the second space, and a neutral bus bar is provided in the other space.

[0408] [Feature A3] The rotating electric machine according to feature A1 or A2, wherein the neutral point bus bar and the bus bar protection portion are provided at positions spaced apart from each other in the axial direction.

[0409] [Features A4] The rotors include a first rotor (300a) and a second rotor (300b) arranged in the axial direction with the first rotor via a stator, The rotating electric machine according to any one of Features A1 to A3, wherein the coil is formed by winding a coil wire (220) having a plurality of wires (223).

[0410] [Feature A5] The coil is formed by a plurality of coil portions (215) wound with a coil wire (220) and arranged in the circumferential direction (CD) of the rotation axis, The rotating electric machine according to any one of Features A1 to A4, wherein two coil portions adjacent to each other in the circumferential direction have different numbers of turns.

[0411] [Feature A6] a relay bus bar (280) electrically connected to a power conversion unit (81) that converts power and supplies the converted power to the power bus bar; a terminal block (285) supporting a connection portion between the power bus bar and the relay bus bar; The rotating electric machine according to any one of A1 to A5, further comprising:

[0412] [Feature A7] The rotating electric machine according to Feature A6, wherein when the circumference of the rotation axis is divided into a plurality of divided regions (RE) at equal intervals in the circumferential direction of the rotation axis, one relay bus bar is arranged in each of the plurality of divided regions.

[0413] [Feature A8] a bearing (360) for rotatably supporting the rotor; a support frame (370) having a bearing support portion (372) that supports a bearing and a bus bar support portion (371) that supports a bus bar protector; The rotating electric machine according to any one of A1 to A7, further comprising:

[0414] [Feature A9] an orthogonal frame (370) extending in a direction perpendicular to the rotation axis; a rotation detection unit (421) that is provided on the opposite side of the neutral bus bar via the orthogonal frame in the axial direction and detects the rotation angle of the rotor; The rotating electric machine according to any one of A1 to A8, further comprising:

[0415] [Feature A10] A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a plurality of phase coils (211); a rotor (300, 300a, 300b) arranged on the stator in an axial direction (AD) along which a rotation axis (Cm) extends, and rotating about the rotation axis relative to the stator; a power bus bar (261) electrically connected to the coil and supplying power to the coil; a neutral bus bar (290) electrically connected to a neutral point (65) side of each of the coils of the plurality of phases; a space partitioning portion (370) extending in a direction perpendicular to the rotation axis and separating a first space (S1) accommodating a stator from a second space (S2) not accommodating a stator so that the first space and the second space are aligned in the axial direction; Equipped with A rotating electric machine, wherein a power bus bar is provided in one of a first space and a second space, and a neutral bus bar is provided in the other space.

[0416] <Composition group B> There is a concern that the energy efficiency of motors such as axial gap motors may decrease. In response to this, a rotating electric machine capable of improving energy efficiency is provided.

[0417] According to the feature B1, the magnetic flux generated by the pair of circumferential magnets (311a, 311b) and the pair of inner axial magnets (312a, 312b) is concentrated on the stator (200), and thus the magnetic field on the stator (200) side is likely to be strong. Therefore, the energy efficiency of the rotating electric machine (60) can be improved.

[0418] [Feature B1] A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a plurality of phase coils (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; Equipped with The rotor is The rotor has a plurality of magnets (310, 311a, 311b, 312a, 312b, 313a, 313b) arranged in a circumferential direction (CD) of a rotation axis, For multiple magnets, A pair of inner axial magnets (312a, 312b) adjacent to each other in the circumferential direction and oriented inclined with respect to the rotation axis so as to face the stator side in the axial direction; a pair of circumferential magnets (311a, 311b) adjacent to each other in the circumferential direction via a pair of inner axial magnets and oriented so as to face each other in the circumferential direction; A rotating electric machine that includes:

[0419] [Feature B2] A rotating electric machine according to Feature B1, wherein the pair of inner axial magnets are oriented at an angle in the circumferential direction relative to the axis of rotation so as to face the stator in the axial direction and to face each other in the circumferential direction.

[0420] [Feature B3] For multiple magnets, a pair of outer axial magnets (313a, 313b) that are arranged on opposite sides of the pair of inner axial magnets in the circumferential direction via a circumferential magnet and are adjacent to each other in the circumferential direction; A rotating electric machine according to Feature B2, wherein the pair of outer-shaft magnets are oriented at an inclination in the circumferential direction relative to the rotation axis so as to face in the opposite direction from the stator in the axial direction and to face in opposite directions from each other in the circumferential direction.

[0421] [Feature B4] The rotors are arranged in pairs in the axial direction, with the rotors interposed between them. A rotating electric machine according to Feature B3, in which one rotor (300a) is arranged point-symmetrically with respect to the other rotor (300b) so that a pair of inner axial magnets of the one rotor and a pair of outer axial magnets of the other rotor (300b) are aligned in the axial direction.

[0422] [Feature B5] The magnet forms a magnet inclined surface (316d) inclined with respect to the rotation axis, The rotor is a magnet holder (320) overlapping the magnet from one side in the axial direction; a fixed support part (330) having a support inclined surface (330a) inclined with respect to the rotation axis, and fixing the magnet to the magnet holder so that the support inclined surface overlaps the magnet inclined surface and the magnet is sandwiched between the support inclined surface and the magnet holder; The rotating electric machine according to any one of features B1 to B4, wherein:

[0423] [Feature B6] The rotor is The magnet unit has a pair of unit side surfaces (316c) arranged in a circumferential direction, includes at least one magnet, and has a plurality of magnet units (316, 317, 318) arranged in a circumferential direction; The multiple magnet units include: A pair of inclined magnet units (317) inclined relative to each other so that their side surfaces are inclined away from each other toward the outside of the radial direction (RD) of the rotation axis; a pair of parallel magnet units (318) whose side surfaces are parallel to each other; The rotating electric machine according to any one of features B1 to B5, which includes:

[0424] [Feature B7] a shaft (340) having a shaft flange (342) axially aligned with and fixed to the rotor, the shaft (340) rotating about a rotation axis together with the rotor; a pressing member (350) that applies a pressing force (F3) to the rotor on the opposite side to the magnet via a rotor fulcrum (344a) formed by the shaft flange in the radial direction (RD) of the rotation axis, so that a bending stress (F2) is generated in the rotor in a direction that moves the magnet away from the coil against the attractive force (F1) between the magnet and the coil; The rotating electric machine according to any one of Features B1 to B6, comprising:

[0425] [Feature B8] The pressing member is a fixture (350) that fixes the rotor to the shaft flange, The rotating electric machine according to Feature B7, wherein the portion (325) of the rotor to which the pressing member is fixed and the portion (345) of the shaft flange to which the pressing member is fixed are spaced apart in the axial direction.

[0426] [Feature B9] a first rotor (300a); a second rotor (300b) arranged axially alongside the first rotor via a stator; a shaft flange (342) provided between the first rotor and the second rotor in the axial direction and rotating about the rotation axis together with the first rotor and the second rotor; a first rotor hole (325a) provided in the first rotor and extending in the axial direction; a second rotor hole (325b) provided in the second rotor at a position spaced apart in the circumferential direction from the first rotor hole and extending in the axial direction; a first shaft hole (345a) provided in the shaft flange at a position aligned with the first rotor hole in the axial direction and extending in the axial direction; a second shaft hole (345b) provided in the shaft flange at a position aligned with the second rotor hole in the axial direction and extending in the axial direction; Equipped with a first fixing member (350a) for fixing the first rotor to the shaft flange is inserted into the first rotor hole and the first shaft hole; The rotary electric machine according to any one of Features B1 to B8, wherein a second fastener (350b) for fastening the second rotor to the shaft flange is inserted into the second rotor hole and the second shaft hole.

[0427] <Composition group C> There is a concern that the heat dissipation effect of motors such as axial gap motors may be insufficient. In response to this, a rotating electric machine capable of improving the heat dissipation effect is provided.

[0428] According to feature C1, the coil protection portion (250) is provided so as to overlap the inner peripheral surface (70b) of the electric housing (70). With this configuration, heat from the coil (211) is easily transferred to the electric housing (70) via the coil protection portion (250). Furthermore, since the outer peripheral surface (70a) of the electric housing (70) is provided with heat dissipation fins (72), the heat transferred from the coil protection portion (250) to the electric housing (70) is easily dissipated to the outside by the heat dissipation fins (72). This improves the heat dissipation effect of the rotating electric machine (60).

[0429] [Feature C1] A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a plurality of phase coils (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric machine housing (70) containing a stator and a rotor; a heat dissipation fin (72) provided on the outer peripheral surface (70a) of the electric housing for dissipating heat; Equipped with The stator is A rotating electric machine having a coil protection part (250) that is provided in a state of being superimposed on an inner peripheral surface (70b) of an electric machine housing, has thermal conductivity, and protects a coil.

[0430] [Feature C2] The electric housing has a plurality of protrusions (171, 172, 173, 174) provided on an inner peripheral surface thereof, The rotating electric machine according to Feature C1, wherein the coil protection portion is inserted between the protrusions from the inside in the radial direction (RD) of the rotation axis.

[0431] [Feature C3] The plurality of protrusions includes a plurality of axial protrusions (174) extending in the axial direction and arranged in the circumferential direction (CD) of the rotation axis, The coil is formed by a plurality of coil portions (215) wound with a coil wire (220) and arranged in the circumferential direction, The rotating electric machine according to Feature C2, wherein the coil portion is provided at a position facing the shaft protrusion in the radial direction (RD) of the rotation axis.

[0432] [Feature C4] The inner peripheral surface includes a housing base surface (176) and a housing rough surface (177) that is rougher than the housing base surface, The rotating electric machine according to any one of Features C1 to C3, wherein the coil protection portion is superimposed on at least the rough surface of the housing.

[0433] [Feature C5] A rotating electric machine according to any one of features C1 to C4, which is provided with a lead wire protection section (255) that protects the coil lead wire (212) drawn from the coil through the coil protection section and fills the gap between the coil lead wire and the coil protection section.

[0434] [Feature C6] The stator is The rotating electric machine according to any one of features C1 to C5, further comprising: a bobbin (240) that is protected by a coil protection section together with the coil, releases heat to the coil protection section, has electrical insulation, and is wound with the coil.

[0435] [Feature C7] The bobbin has a bobbin base surface (246) and a bobbin rough surface (247) that is rougher than the bobbin base surface, The rotating electric machine according to Feature C6, wherein the coil protection portion is superimposed on at least the rough surface of the bobbin.

[0436] [Feature C8] The stator is A rotating electric motor according to feature C6 or C7, having a core (231) arranged inside the bobbin, the width of which in the circumferential direction (CD) of the rotation axis gradually decreases toward the inside in the radial direction (RD) of the rotation axis.

[0437] [Feature C9] The bobbin is a bobbin body (241) on which a coil is wound; a bobbin flange (242) having a flange surface (243) facing the coil side and extending outward from the outer peripheral surface (241a) of the bobbin body; It has The rotating electric machine according to any one of Features C6 to C8, wherein the flange surface is provided with a flange recess (243a) recessed for passing a coil lead wire (212) drawn out from the coil.

[0438] <Configuration group D> With motors such as axial gap motors, there is a concern that the heat dissipation effect of the motor may be insufficient. It is also conceivable to configure a unit by integrating the motor with an inverter. Even with this unit, it is thought that the heat dissipation effect of the unit may be insufficient due to heat from the inverter, etc. In response to this, we provide a rotating electrical machine unit that can achieve both miniaturization and improved heat dissipation effect.

[0439] According to feature D1, the power conversion section (81), the rotors (300, 300a, 300b) and the stator (200) arranged in the axial direction (AD) are housed in the unit housing (51). With this configuration, the rotating electric machine (60) can be made thinner and the rotating electric machine unit (50) can be made smaller. Moreover, since the heat dissipation fins (72, 92) are provided on the outer peripheral surface (70a, 90a) of the unit housing (51), the heat dissipation effect of the rotating electric machine unit (50) can be improved by the heat dissipation fins (72, 92). Therefore, it is possible to achieve both a smaller size of the rotating electric machine unit (50) and an improved heat dissipation effect.

[0440] [Feature D1] A rotating electrical machine unit (50) driven by a supply of electric power, a rotating electric machine (60) having rotors (300, 300a, 300b) rotating about a rotation axis (Cm) and a stator (200) arranged on the rotor in an axial direction (AD) along which the rotation axis extends; a power converter (80) having a power converter (81) that converts power supplied to a rotating electric machine; a unit housing (51) that forms both an outer peripheral surface (70a) of the rotating electric machine and an outer peripheral surface (90a) of the power converter and that houses a rotor, a stator, and a power converter; a heat dissipation fin (72, 92) provided on an outer peripheral surface (70a, 90a) of the unit housing for dissipating heat; A rotating electrical machine unit comprising:

[0441] [Feature D2] The stator is a coil (211) through which current flows; a coil protection portion (250) that is provided in a state of being superimposed on the inner peripheral surface (70b) of the unit housing, has thermal conductivity, and protects the coil; The rotating electrical machine unit according to feature D1,

[0442] [Feature D3] Rotating electric machines are The electric machine has an electric machine housing (70) that is included in the unit housing, forms the outer peripheral surface of the rotating electric machine, and houses a rotor and a stator. The power conversion device The power converter includes a device housing (90) that is included in the unit housing and forms an outer peripheral surface of the power converter and houses a power conversion unit. The rotating electric machine unit according to feature D1 or D2, wherein the electric machine housing and the device housing are aligned in the axial direction in the unit housing.

[0443] [Feature D4] a shaft (340) having a shaft flange (342) axially aligned with and fixed to the rotor, the shaft (340) rotating about a rotation axis together with the rotor; The shaft flange is an annular portion (344) provided inside the stator in a radial direction (RD) of the rotation axis and extending annularly along the stator in a circumferential direction (CD) of the rotation axis; a flange vent (345) that extends radially through the annular portion and allows for radial ventilation; The rotating electrical machine unit according to any one of features D1 to D3, wherein:

[0444] [Feature D5] a balance adjustment hole (326) provided in the rotor for adjusting the balance of the rotor; A rotating electrical unit according to any one of features D1 to D4, wherein the balance adjustment hole penetrates the rotor in the axial direction and is provided inside the stator in the radial direction (RD) of the rotation axis to allow ventilation in the axial direction.

[0445] [Feature D6] a housing partition (370, 424) that partitions the inside of the unit housing in the axial direction into a rotating electrical machine side and a power conversion unit side; A plurality of state detection units (421, 431) for detecting the state of the rotating electric machine; a wiring collection section (440) provided on the power converter side of the housing partition section and collecting together detection wirings (426, 436) electrically connected to the plurality of state detection sections; The rotating electrical machine unit according to any one of features D1 to D5, comprising:

[0446] [Feature D7] a housing partition (370, 424) that partitions the inside of the unit housing in the axial direction into a rotating electrical machine side and a power conversion unit side; a partition opening (373) through which a coil lead wire (212) drawn from a coil (211) of the stator is inserted and which opens the housing partition in the axial direction; a partition cover portion (380) covering the partition opening; A rotating electrical machine unit according to feature D6, comprising:

[0447] [Feature D8] The unit housing is The rotating electric machine has an electric machine housing (70) that forms the outer peripheral surface of the rotating electric machine and accommodates a rotor and a stator. The electrical housing is a housing body (71) that forms the outer peripheral surface of the rotating electrical machine; an electrical flange (74, 178) protruding outward from the housing body in the radial direction (RD) of the rotation axis; an electric appliance fixing hole (74a, 178a) provided in the electric appliance flange for fixing the electric appliance housing to a predetermined housing fixing object (90, 390); The rotating electrical machine unit according to any one of features D1 to D7, wherein:

[0448] [Feature D9] The unit housing is an electric machine housing (70) that forms the outer peripheral surface of the rotating electric machine and accommodates a rotor and a stator; an electric machine cover portion (390) fixed to the electric machine housing and covering the rotor and the stator from one axial side; It has The electrical cover is a first fixing hole (392a) for fixing the electric cover portion to the electric housing; a second fixing hole (392b) aligned with the first fixing hole in the radial direction (RD) of the rotation axis, for fixing the electric cover portion to a predetermined cover fixing target (53); The rotating electrical machine unit according to any one of features D1 to D8, wherein:

[0449] (Disclosure of technical ideas) This specification discloses multiple technical ideas described in the following multiple clauses. Some clauses may be written in a multiple dependent form, with the subsequent clause referring to the preceding clause as an alternative. Furthermore, some clauses may be written in a multiple dependent form, referring to another multiple dependent clause. These multiple dependent clauses define multiple technical ideas.

[0450] (Technical thought 1) A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a coil (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric machine housing (70) that houses the stator and the rotor; a heat dissipation promoting portion (72, 551, 561, 571, 581) provided on one of the inside and outside of the coil in the radial direction (RD) of the rotation axis, promoting heat dissipation from the coil to one side so that heat dissipation from the coil to one side is greater than heat dissipation to the other side; a temperature detection unit (431, 431A, 431B, 431C, 431D) accommodated in the electrical housing and disposed on the opposite side of the coil from the heat dissipation promotion unit in the radial direction, the temperature detection unit detecting an internal temperature of the electrical housing; A rotating electric machine comprising:

[0451] (Technical thought 2) an electric bus bar (290) provided on one of the inside and outside of the coil in the radial direction and connected to the coil so as to be electrically conductive; As the temperature detection unit, a bus bar detection unit (431A) provided on the energized bus bar; The rotating electric machine according to Technical Idea 1 is provided with:

[0452] (Technical Thought 3) The rotating electric machine according to Technical Idea 1 or 2, further comprising a coil detector (431B) provided in the coil as the temperature detector.

[0453] (Technical Thought 4) a coil lead wire (213) drawn out from the coil; As the temperature detection unit, a lead detection unit (431C) provided on the coil lead wire; 4. A rotating electric machine according to any one of Technical Ideas 1 to 3, comprising:

[0454] (Technical Thought 5) a coil protection portion (250) having thermal conductivity and protecting the coil; As the temperature detection unit, embedded detection units (431A, 431B, 431C, 431D) embedded in the coil protection unit; 5. A rotating electric machine according to any one of Technical Ideas 1 to 4, comprising:

[0455] (Technical Thought 6) a coil body (900) having a wound coil wire (220), the coil wire being arranged in a circumferential direction (CD) of the rotation axis so as to form the coil; a temperature communication line (436, 436A, 436B) that passes between two of the coil bodies that are adjacent in the circumferential direction and extends in the radial direction, and is communicatively connected to the temperature detection unit; 6. A rotating electric machine according to any one of Technical Ideas 1 to 5, comprising:

[0456] (Technical Thought 7) The rotating electric machine according to Technical Idea 6, wherein the temperature communication line is fixed to at least one of the two coil bodies adjacent in the circumferential direction.

[0457] (Technical Thought 8) The coil body has a bobbin (240) that supports the coil wire, The bobbin is A pair of bobbin flanges (242) extending in a direction perpendicular to the axial direction and aligned in the axial direction; a bobbin body portion (241) that connects the pair of bobbin flanges and supports the coil wire wound between the pair of bobbin flanges; It has A rotating electric motor as described in Technical Idea 6 or 7, wherein the temperature communication line is an intruded line (436A) that extends in the radial direction through a position that is intruded between a pair of bobbin flanges in one of the two circumferentially adjacent coil bodies.

[0458] (Technical Thought 9) As the heat dissipation promotion portion, an outer peripheral promotion portion (72, 561, 581) provided on the outer side of the coil in the radial direction; As the temperature detection unit, an inner circumference detection unit (431A, 431B, 431C) provided inside the coil in the radial direction; 9. A rotating electric machine according to any one of Technical Ideas 1 to 8, comprising:

[0459] (Technical Thought 10) As the heat dissipation promotion portion, an inner circumference promotion portion (551, 571) provided inside the coil in the radial direction; As the temperature detection unit, an outer periphery detection unit (431D) provided outside the coil in the radial direction; 9. A rotating electric machine according to any one of Technical Ideas 1 to 8, comprising: [Explanation of symbols]

[0460] <Composition group A> 60...motor device as a rotating electric machine, 65...neutral point, 81...inverter as a power conversion unit, 200...stator, 211...coil, 215...coil unit, 220...coil wire, 223...wire, 261...power bus bar, 270...bus bar protection unit, 280...relay terminal as a relay bus bar, 285...terminal block as a terminal block, 290...neutral point bus bar, 300...rotor, 300a...first rotor as rotor, 300b...second rotor as rotor, 360...first bearing as bearing, 370...rear frame as space partition unit, support frame and orthogonal frame, 371...bus bar support unit, 372...bearing support unit, 421...resolver as rotation detection unit, S1...stator side space as first space, S2...inverter side space as second space, Cm...motor axis as rotation axis, RE...division area, AD...axial direction, RD...radial direction.

[0461] <Composition group B> 60...motor device as a rotating electric machine, 200...stator, 211...coil, 300...rotor, 300a...first rotor as a rotor, 300b...second rotor as a rotor, 310...magnet, 311a...first peripheral magnet as a magnet and peripheral magnet, 311b...second peripheral magnet as a magnet and peripheral magnet, 312a...first inner axial magnet as a magnet and inner axial magnet, 312b...second inner axial magnet as a magnet and inner axial magnet, 313a...first outer axial magnet as a magnet and outer axial magnet, 313b...second outer axial magnet as a magnet and outer axial magnet, 316...magnet unit, 317...inclined magnet unit as a magnet unit, 318...parallel magnet unit as a magnet unit, 316c...unit side surface, 316d...inner peripheral tapered surface as a magnet inclined surface, 320...magnet holder, 325...part holder fixing hole as a position, 325a...first holder fixing hole as a first rotor hole, 325b...second holder fixing hole as a second rotor hole, 330...fixed block as a fixed support part, 330a...block tapered surface as a support inclined surface, 340...shaft, 342...shaft flange, 344a...rim tip as a fulcrum, 345...flange hole as a part, 345a...first flange hole as a first shaft hole, 345b...second flange hole as a second shaft hole, 350...holder fixing tool as a pressing member, 350a...first holder fixing tool as a first fixing tool, 350b...second holder fixing tool as a second fixing tool, F1...suction force, F2...bending stress, F3...pressing force, Cm...motor axis as a rotation axis, AD...axial direction, CD...circumferential direction, RD...radial direction.

[0462] <Composition group C> 60...motor device as a rotating electric machine, 70...motor housing as an electric machine housing, 70a...outer peripheral surface, 70b...inner peripheral surface, 72...motor fins as heat dissipation fins, 171...stator holding portion as a convex portion, 172...first circumferential holding portion as a convex portion, 173...second circumferential holding portion as a convex portion, 174...shaft holding portion as a convex portion and a shaft convex portion, 176...housing base surface, 177...housing rough surface, 200...stator, 211...coil, 212...power lead wire as a coil lead wire, 215...coil portion, 220...coil Coil wire, 231...core, 240...bobbin, 241...bobbin body, 241a...outer surface, 242...bobbin flange, 243...flange inner plate surface as flange surface, 243a...flange recess, 246...bobbin base surface, 247...bobbin rough surface, 250...coil protection portion, 255...grommet as lead wire protection portion, 300...rotor, 300a...first rotor as rotor, 300b...second rotor as rotor, 310...magnet, Cm...motor axis as rotation axis, AD...axial direction, CD...circumferential direction, RD...radial direction.

[0463] <Configuration group D> 50...motor device unit as a rotating electric machine unit, 51...unit housing, 53...reduction gear as object to which cover is fixed, 60...motor device as a rotating electric machine, 70...motor housing as an electric machine housing, 71...housing body, 70a...outer peripheral surface, 70b...inner peripheral surface, 72...motor fins as heat dissipation fins, 74...connecting flange as an electric machine flange, 74a...flange hole as an electric machine fixing hole, 80...inverter device as a power conversion device, 81...inverter as a power conversion unit, 90...device housing and inverter housing as object to which housing is fixed, 90a...outer peripheral surface, 92...inverter fins, 178...fixing flange as an electric machine flange, 178a...flange hole as an electric machine fixing hole, 200...stator, 211...coil, 212...power lead wire as a coil lead wire, 250...coil protection part, 300...rotor, 300a...rotor The first rotor, 300b...second rotor as rotor, 326...holder adjustment hole as balance adjustment hole, 340...shaft, 342...shaft flange, 344...rim as annular portion, 345...flange ventilation hole, 370...rear frame as housing partition portion, 373...frame opening as partition opening, 380...dustproof cover as partition cover portion, 390...drive frame as electrical cover portion and housing fixed object, 392a...inner fixing hole as first fixing hole, 392b...outer fixing hole as second fixing hole, 421...resolver as status detection portion, 424...resolver cover as housing partition portion, 426...signal wiring as detection wiring, 431...temperature sensor as status detection portion, 436...signal wiring as detection wiring, 440...signal terminal block as wiring aggregation portion, Cm...motor axis as rotation axis, AD...axial direction, CD...circumferential direction, RD...radial direction.

[0464] <Composition group O> 60...motor device as a rotating electric machine, 70...motor housing as an electric machine housing, 72...motor fins as heat dissipation promotion portion and outer periphery promotion portion, 200...stator, 211...stator coil as a coil, 213...neutral lead wire as a coil lead wire, 220...coil wire, 240...bobbin, 241...bobbin body portion, 242...bobbin flange, 250...coil protection portion, 290...neutral point bus bar as a current-carrying bus bar, 300...rotor, 300a...first rotor as a rotor, 300b...second rotor as a rotor, 431...temperature sensor as a temperature detection portion, 431A...bus bar sensor as a temperature detection portion, bus bar detection portion, embedded detection portion and inner periphery detection portion, 431B...temperature detection portion, coil detection portion, embedded detection portion coil sensor as part and inner circumference detection part, 431C... temperature detection part, pull-out sensor, pull-out sensor as embedded detection part and inner circumference detection part, 431D... outer circumference sensor as temperature detection part, embedded detection part and outer circumference detection part, 436... temperature signal wiring as temperature communication line, 436A... passing signal line as temperature communication line and incoming line, 436B... gap signal line as temperature communication line, 551... inner circumference heat absorption part as heat dissipation promotion part and inner circumference promotion part, 561... outer circumference heat absorption part as heat dissipation promotion part and outer circumference promotion part, 571... inner circumference cooling part as heat dissipation promotion part and inner circumference promotion part, 581... inner circumference cooling part as heat dissipation promotion part and outer circumference promotion part, 900... coil body, Cm... motor axis as rotation axis, AD... axial direction, CD... circumferential direction, RD... radial direction.

Claims

1. A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a coil (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric machine housing (70) containing the stator and the rotor; a heat dissipation promoting portion (72, 551, 561, 571) provided on one of the inside and outside of the coil in the radial direction (RD) of the rotation axis, promoting heat dissipation from the coil to one side so that heat dissipation from the coil to one side is greater than heat dissipation to the other side; a temperature detection unit (431, 431A, 431B, 431C, 431D) accommodated in the electrical housing, provided on the opposite side of the coil from the heat dissipation promotion unit in the radial direction, and configured to detect an internal temperature of the electrical housing; As the heat dissipation promoting portion, an opposing promoting portion (72, 561) is provided at a position opposing an outer peripheral surface (211c) of the coil on the outer peripheral side of the coil; As the temperature detection unit, opposing detection units (431A, 431B, 431C) are provided at positions facing the inner circumferential surface (211d) of the coil on the inner circumferential side of the coil; A rotating electric machine comprising:

2. A rotating electric machine (60) driven by a supply of electric power, a stator (200) having a coil (211); a rotor (300, 300a, 300b) that rotates around a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric machine housing (70) containing the stator and the rotor; a heat dissipation promoting portion (72, 551, 561, 571) provided on one of the inside and outside of the coil in the radial direction (RD) of the rotation axis, promoting heat dissipation from the coil to one side so that heat dissipation from the coil to one side is greater than heat dissipation to the other side; a temperature detection unit (431, 431A, 431B, 431C, 431D) accommodated in the electrical housing, provided on the opposite side of the coil from the heat dissipation promotion unit in the radial direction, and configured to detect an internal temperature of the electrical housing; a coil body (900) having a wound coil wire (220) arranged in a circumferential direction (CD) of the rotation axis so that the coil wire forms the coil; a temperature communication line (436, 436A, 436B) that passes between two of the coil bodies that are adjacent in the circumferential direction and extends in the radial direction and is communicatively connected to the temperature detection unit; Equipped with The coil body has a bobbin (240) that supports the coil wire, The bobbin is A pair of bobbin flanges (242) extending in a direction perpendicular to the axial direction and aligned in the axial direction; a bobbin body (241) that connects the pair of bobbin flanges and supports the coil wire wound between the pair of bobbin flanges; It has The temperature communication line is an intruded line (436A) that extends radially through a position that is intruded between a pair of bobbin flanges in one of the two circumferentially adjacent coil bodies.

3. an electric bus bar (290) provided on one of the inside and outside of the coil in the radial direction and connected to the coil so as to be electrically conductive; As the temperature detection unit, a bus bar detection unit (431A) provided on the energized bus bar; 3. The rotating electric machine according to claim 1, further comprising:

4. 3. The rotating electric machine according to claim 1, further comprising a coil detector (431B) provided in the coil as the temperature detector.

5. a coil lead wire (213) drawn out from the coil; As the temperature detection unit, a lead detection unit (431C) provided on the coil lead wire; 3. The rotating electric machine according to claim 1, further comprising:

6. a coil protection part (250) having thermal conductivity and protecting the coil; As the temperature detection unit, embedded detection units (431A, 431B, 431C, 431D) embedded in the coil protection unit; 3. The rotating electric machine according to claim 1, further comprising:

7. a coil body (900) having a wound coil wire (220) arranged in a circumferential direction (CD) of the rotation axis so that the coil wire forms the coil; a temperature communication line (436, 436A, 436B) that passes between two of the coil bodies that are adjacent in the circumferential direction and extends in the radial direction and is communicatively connected to the temperature detection unit; The rotating electric machine according to claim 1 , further comprising:

8. The rotating electric machine according to claim 7 , wherein the temperature communication line is fixed to at least one of two of the coil bodies adjacent in the circumferential direction.

9. The coil body has a bobbin (240) that supports the coil wire, The bobbin is A pair of bobbin flanges (242) extending in a direction perpendicular to the axial direction and aligned in the axial direction; a bobbin body (241) that connects the pair of bobbin flanges and supports the coil wire wound between the pair of bobbin flanges; It has A rotating electric motor as described in claim 7 or 8, wherein the temperature communication line is an indented line (436A) that extends in the radial direction through a position that is indented between a pair of bobbin flanges in one of the two circumferentially adjacent coil bodies.

10. As the heat dissipation promotion portion, an outer peripheral promotion portion (72, 561) provided on the outer side of the coil in the radial direction; As the temperature detection unit, an inner circumference detection unit (431A, 431B, 431C) provided inside the coil in the radial direction; 3. The rotating electric machine according to claim 1, further comprising:

11. As the heat dissipation promotion portion, an inner circumference promotion portion (551, 571) provided inside the coil in the radial direction; As the temperature detection unit, an outer peripheral detection unit (431D) provided outside the coil in the radial direction; 3. The rotating electric machine according to claim 2, further comprising:

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