Rotary electric machine, coil module, and method for manufacturing rotary electric machine

Abstract

To provide a rotary electric machine capable of suppressing vibration of a coil part, a coil module, and a method of manufacturing the rotary electric machine.SOLUTION: The motor device 60 includes a stator 200 and a motor housing 70. The motor housing 70 accommodates the stator 200. The motor housing 70 has a motor outer peripheral wall 71. The stator 200 includes a core piece 210 and an adhesive film 255. A plurality of core pieces 210 are arranged in the circumferential direction CD. The adhesive film 255 is provided between two core pieces 210 adjacent to each other in the circumferential direction CD, and bonds the two core pieces 210. The adhesive film 255 is provided at a core piece boundary 216 which is a boundary between the two core pieces 210. The adhesive film 255 restricts one of the two core pieces 210 from moving relative to the other.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The disclosure in this specification relates to a rotating electric machine, a coil module, and a method for manufacturing a rotating electric machine. [Background technology]

[0002] Patent Document 1 describes an axial gap motor. In this motor, a stator and a rotor are arranged in the axial direction. The stator and the rotor are housed in a housing. The stator has a plurality of coil portions arranged in the circumferential direction and a molded resin that integrally molds the plurality of coil portions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-2914 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned Patent Document 1, even if the multiple coil portions are molded with molding resin, there is a concern that the coil portions may vibrate when the motor is driven or the like.

[0005] An object of the present disclosure is to provide a rotating electric machine, a coil module, and a method for manufacturing a rotating electric machine that can suppress vibration of a coil portion. [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 energizing a coil (64), a stator (200) having a coil portion (211) that forms at least a part of a coil; a rotor (300) 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 a stator and a rotor; a coil support portion (280) fixed to the electric housing and supporting the coil portion in a state of spanning the coil portion and the electric housing; an intervening restricting portion (255) provided between two adjacent coil portions in the circumferential direction (CD) of the rotation axis, which restricts one of the coil portions from moving relative to the other in the circumferential direction; It is a rotating electric machine equipped with the above.

[0008] In the above rotating electric machine, the interposition restricting portion is provided between two circumferentially adjacent coil portions and restricts one of the coil portions from moving relative to the other in the circumferential direction. In this configuration, the interposition restricting portion restricts one of the two coil portions from vibrating relative to the other in the circumferential direction due to driving of the rotating electric machine, etc. Therefore, vibration of the coil portions in the rotating electric machine can be suppressed.

[0009] The disclosed aspects include: A coil module (250) forming a coil (64) of a rotating electric machine (60), a plurality of coil portions (211) that form at least a part of the coil and are arranged in a predetermined direction (CD); an intervening restricting portion (255) provided between two coil portions adjacent to each other in a predetermined direction and restricting one coil portion from moving relative to the other coil portion in the predetermined direction; Equipped with The coil sections are fixed to each other to form a coil module.

[0010] According to the coil module, the interposition restricting portion is provided between two circumferentially adjacent coil portions and restricts one of the coil portions from moving relative to the other in the circumferential direction, thereby suppressing vibration of the coil portions, similar to the rotating electric machine.

[0011] The disclosed aspects include: a stator (200) having a coil portion (211) that forms at least a part of the coil (64); a rotor (300) 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 a stator and a rotor; A manufacturing method for manufacturing a rotating electric machine (60) comprising: a module process (P102) for assembling a coil module (250) having a plurality of coil sections (211) arranged in a circumferential direction (CD) of a rotation axis, in which an intervening restricting section (255) is provided between two coil sections adjacent to each other in the circumferential direction (CD) of the rotation axis to restrict relative movement of one coil section in the circumferential direction with respect to the other coil section; an installation step (P104) of installing the coil module inside the electrical housing; a fixing step (P103, P105) of fixing the coil module to the electric housing using a coil support (280) that supports the coil part in a state of being stretched across the coil part and the electric housing; The present invention relates to a method for manufacturing a rotating electric machine having the above-mentioned features.

[0012] According to the manufacturing method of the rotating electric machine, in the module process, an interposition restricting portion is provided between two circumferentially adjacent coil portions so as to restrict one of the two circumferentially adjacent coil portions from moving relative to the other in the circumferential direction, thereby suppressing vibration of the coil portions, as in the rotating electric machine. [Brief explanation of the drawings]

[0013] [Figure 1]FIG. 1 is a diagram showing the configuration of an eVTOL in a first embodiment. [Figure 2] FIG. 2 is a diagram showing the electrical configuration of the propulsion system. [Figure 3] Schematic perspective view of an EPU. [Figure 4] FIG. 2 is a schematic vertical cross-sectional view of the motor device. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 3 is an exploded perspective view of the core piece and the first support plate. [Figure 9] FIG. [Figure 10] FIG. 10 is a plan view of an adhesive film in a motor device. [Figure 11] Cross-sectional view of the adhesive film at the first boundary. [Figure 12] 4A and 4B are diagrams for explaining the relationship between the mechanical angle and the electrical angle in the core piece module. [Figure 13] FIG. [Figure 14] FIG. 4 is a diagram for explaining an axial load. [Figure 15] 4 is a flowchart showing the procedure of a manufacturing process for the motor device. [Figure 16] FIG. 10 is a perspective view of a coil module according to a second embodiment. [Figure 17] FIG. 11 is a perspective view of a core piece group and a core piece support portion in a third embodiment. [Figure 18] FIG. [Figure 19] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] 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.

[0015] First Embodiment The propulsion system 30 shown in FIG. 1 is mounted on the eVTOL 10. The eVTOL 10 is an electric vertical take-off and landing aircraft. An electric vertical take-off and landing aircraft is an electric vertical take-off and landing aircraft that is capable of vertical take-off and landing. eVTOL is an abbreviation for electric Vertical Take-Off and Landing aircraft. The eVTOL 10 is an electric air vehicle that flies in the atmosphere, and is sometimes referred to as an electric air vehicle. The eVTOL 10 is also an electric aircraft, and is sometimes referred to as an electric aircraft. The eVTOL 10 is a manned air vehicle that carries a crew member. The crew member of the eVTOL 10 includes a pilot who operates or drives the aircraft. The propulsion system 30 is a system that drives the eVTOL 10 to fly. The propulsion system 30 is sometimes referred to as a flight system.

[0016] The eVTOL 10 has an airframe 11 and a propeller 20. The airframe 11 has an airframe main body 12 and wings 13. The airframe main body 12 is the fuselage of the airframe 11 and has a shape that extends, for example, in the front-to-rear direction. The wings 13 extend from the airframe main body 12 and multiple wings 13 are provided on the airframe main body 12. The wings 13 are fixed wings. The multiple wings 13 include main wings, a tail, and the like.

[0017] The eVTOL 10 has a cabin. The cabin is provided inside the eVTOL 10. For example, the cabin is the internal space of the aircraft body 12, and is formed by the aircraft body 12. The cabin can be a crew cabin 14 or a cargo bay. The crew cabin 14 can be a passenger cabin or a pilot cabin. The crew cabin 14 is provided with seats for crew members to sit in. The crew cabin 14 does not have to have crew members on board, and can instead house cargo.

[0018] A plurality of propellers 20 are provided on the airframe 11. The eVTOL 10 is a multicopter having at least three propellers 20. For example, at least four propellers 20 are provided on the airframe 11. The propellers 20 are provided on each of the airframe body 12 and the wings 13. The propellers 20 rotate around a propeller axis. The propeller axis is, for example, the center line of the propeller 20. The propellers 20 can generate thrust and lift for the eVTOL 10. The propellers 20 are also sometimes referred to as rotors or rotating blades.

[0019] The propeller 20 has blades 21 and a boss 22. A plurality of the blades 21 are arranged in the circumferential direction of the propeller axis. The boss 22 connects the plurality of blades 21. The blades 21 extend from the boss 22 in the radial direction of the propeller axis. The propeller 20 has a propeller shaft (not shown). The propeller shaft is the rotation axis of the propeller 20 and extends from the boss 22 along the propeller axis.

[0020] The eVTOL 10 is a tilt rotor aircraft. In the eVTOL 10, the tilt angle of the propeller 20 is adjustable. Note that the eVTOL 10 does not have to be a tilt rotor aircraft. For example, the eVTOL 10 may have a propeller 20 for lift and a propeller 20 for cruising.

[0021] The eVTOL 10 has a battery 31, a distributor 32, a flight control device 40, and an EPU 50. The battery 31, the distributor 32, the flight control device 40, and the EPU 50 are included in the propulsion system 30. The battery 31 is connected to the multiple EPUs 50 so that electricity can be conducted thereto. The battery 31 is a power supply unit that supplies power to the EPUs 50, and corresponds to a power supply unit. The battery 31 is a DC voltage source that applies a DC voltage to the EPU 50. The battery 31 has a chargeable and dischargeable secondary battery. The battery 31 also supplies power to the flight control device 40. 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.

[0022] The distributor 32 is electrically connected to the battery 31 and the plurality of EPUs 50. The distributor 32 distributes the power from the battery 31 to the plurality of EPUs 50. The power distributed by the distributor 32 to the EPUs 50 is drive power for driving the EPUs 50.

[0023] The flight control device 40 controls the propulsion system 30. The flight control device 40 performs flight control for flying the eVTOL 10. The flight control device 40 is communicatively connected to multiple EPUs 50. The flight control device 40 controls the multiple EPUs 50 individually. The flight control device 40 controls the EPUs 50 via a control circuit 160, which will be described later. The flight control device 40 controls the control circuit 160.

[0024] The EPU 50 is a device that drives the propeller 20 to rotate, and corresponds to a drive device. EPU is an abbreviation for Electric Propulsion Unit. The EPU 50 is sometimes called an electric drive device or an electric drive system. An EPU 50 is provided individually for each of the multiple propellers 20. The EPUs 50 are arranged on the propellers 20 along the propeller axis. All of the multiple EPUs 50 are fixed to the airframe 11. The EPUs 50 support the propellers 20 so that they can rotate. The EPUs 50 are connected to the propellers 20. The propellers 20 are fixed to the airframe 11 via the EPUs 50. When the tilt angle of the propellers 20 is changed, the angle of the EPUs 50 is also changed.

[0025] The eVTOL 10 has a propulsion device 15. The propulsion device 15 is a device for propelling the eVTOL 10. The eVTOL 10 is capable of flight such as lift due to propulsion by the propulsion device 15. The propulsion device 15 has a propeller 20 and an EPU 50. In the propulsion device 15, the propeller 20 rotates as the EPU 50 is driven. The propeller 20 corresponds to a rotating body. The eVTOL 10 flies due to the rotation of the propeller 20. In other words, the eVTOL 10 moves due to the rotation of the propeller 20. The eVTOL 10 corresponds to a moving body.

[0026] As shown in Figures 1 and 2, the EPU 50 has a motor device 60 and an inverter device 80. The motor device 60 has a motor 61. The motor device 60 corresponds to a rotating electric machine. The inverter device 80 has an inverter 81. The motor 61 is electrically connected to the battery 31 via the inverter 81. The motor 61 is driven in response to power supplied from the battery 31 via the inverter 81.

[0027] The motor 61 is a multi-phase AC motor. The motor 61 is, for example, a three-phase AC motor and has U-phase, V-phase, and W-phase. The motor 61 is a driving source for moving a 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 has multi-phase coils 64. The coils 64 are windings and form an armature. The motor 61 is driven by energizing the coils 64. The coils 64 are provided for the U-phase, V-phase, and W-phase, respectively. For example, the motor 61 has a U-phase coil 64, a V-phase coil 64, and a W-phase coil 64. In the motor 61, the multi-phase coils 64 are connected to each other at a neutral point 65. The U-phase may be referred to as the first phase, the V-phase may be referred to as the second phase, and the W-phase may be referred to as the third phase.

[0028] In FIG. 2, 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. The inverter device 80 is sometimes referred to as a power conversion device.

[0029] 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.

[0030] The EPU 50 has an output line 143. The output line 143 is a power line for supplying power to the motor 61. 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.

[0031] 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.

[0032] The inverter 81 is a power conversion circuit, for example, a DC-AC conversion circuit. The inverter 81 has upper and lower arm circuits 85 for a plurality of phases. For example, the inverter 81 has an upper and lower arm circuit 85 for each of the U phase, V phase, and W phase. The upper and lower 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.

[0033] The output line 143 is connected to the upper and lower arm circuits 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 upper and lower arm circuits 85 and the coil 64 for each of the multiple phases. The output line 143 is connected to the side of the coil 64 opposite to the neutral point 65.

[0034] The upper arm 85a and the lower arm 85b have an arm switch 86 and a diode 87. The arm switch 86 is a transistor such as a MOSFET. MOSFET is an abbreviation for Metal-Oxide-Semiconductor Field-Effect Transistor. The arm switch 86 is a switching element that can convert power by switching. The switching element may be a semiconductor element such as a power element. The arm switch 86 is a conversion switch for converting power.

[0035] The EPU 50 has a control circuit 160. The control circuit 160 is included in the inverter device 80. The control circuit 160 controls the driving of the inverter 81. The control circuit 160 controls the driving of the motor 61 via the inverter 81. The control circuit 160 is sometimes referred to as a motor control unit. In FIG. 2, the control circuit 160 is illustrated as CD.

[0036] As shown in FIG. 3, in the EPU 50, the motor device 60 and the inverter device 80 are arranged in the axial direction AD along the motor axis Cm. The motor device 60 is provided between the propeller 20 and the inverter device 80 in the axial direction AD. The motor axis Cm is the center line of the motor 61 and is a virtual line that extends linearly. The motor axis Cm corresponds to the rotation axis. The axial direction AD is the direction in which the motor axis Cm extends.

[0037] With respect to the motor axis Cm, the axial direction AD, the circumferential direction CD, and the radial direction RD are perpendicular to one another. The circumferential direction CD is the direction of rotation of the motor 61. With respect to the radial direction RD, the outer side is sometimes referred to as the radially outer side or the outer circumferential side, and the inner side is sometimes referred to as the radially inner side or the inner circumferential side. The axial direction AD is sometimes referred to as the axial direction.

[0038] The EPU 50 has a motor housing 70 and an inverter housing 90. The motor housing 70 is included in the motor device 60. The motor housing 70 houses a motor 61. The inverter housing 90 is included in the inverter device 80. The inverter housing 90 houses an inverter 81. The motor housing 70 and the inverter housing 90 are connected to each other.

[0039] As shown in FIG. 4, the motor housing 70 has a motor outer peripheral wall 71, a rear frame 370, and a drive frame 390. The motor outer peripheral wall 71 and the frames 370, 390 are made of a metal material or the like and have thermal conductivity. The motor outer peripheral wall 71 is cylindrical and extends in the axial direction AD. The frames 370, 390 are plate-shaped and extend in a direction perpendicular to the axial direction AD. The rear frame 370 and the drive frame 390 are arranged in the axial direction AD via the motor outer peripheral wall 71. The frames 370, 390 are fixed to the motor outer peripheral wall 71 with fasteners such as bolts. Note that FIG. 4 shows a longitudinal cross section of the motor device 60 taken along the motor axis Cm.

[0040] The motor housing 70 has a housing outer peripheral surface 70a and a housing inner peripheral surface 70b. The housing outer peripheral surface 70a is the outer peripheral surface of the motor housing 70 and is included in the outer surface of the motor housing 70. The housing inner peripheral surface 70b is the inner peripheral surface of the motor housing 70 and is included in the inner surface of the motor housing 70. The housing outer peripheral surface 70a and the housing inner peripheral surface 70b are formed by the motor outer peripheral wall 71.

[0041] The rear frame 370 covers the inner space of the motor outer peripheral wall 71 from the inverter device 80 side. The rear frame 370 is provided on the opposite side of the motor outer peripheral wall 71 from the propeller 20. The drive frame 390 covers the inner space of the motor outer peripheral wall 71 from the opposite side of the inverter device 80. The drive frame 390 is provided on the propeller 20 side of the motor outer peripheral wall 71.

[0042] The motor housing 70 has motor fins 72. The motor fins 72 are provided on the outer surface of the motor housing 70. For example, the motor fins 72 are provided on the housing outer peripheral surface 70a. The motor fins 72 protrude from the motor outer peripheral wall 71 toward the outer periphery. The motor fins 72 extend in a direction perpendicular to the circumferential direction CD. Multiple motor fins 72 are arranged in the circumferential direction CD. The motor fins 72 are heat dissipation fins that dissipate heat from the motor device 60 to the outside.

[0043] The motor 61 has a stator 200, a rotor 300, and a shaft 340. The stator 200 is a stator. The stator 200 has a coil 64. The rotor 300 is a rotor. The rotor 300 rotates relative to the stator 200. The rotor 300 rotates around a motor axis Cm. The motor axis Cm is the center line of the rotor 300. The stator 200 extends annularly in the circumferential direction CD. The motor axis Cm coincides with the center line of the stator 200.

[0044] The motor device 60 is an axial gap type rotating electric machine. The motor 61 is an axial gap type motor. In the motor 61, a stator 200 and a rotor 300 are arranged in the axial direction AD with an axial gap 305 interposed therebetween. The motor device 60 is a double-rotor type rotating electric machine. The motor 61 is a double-rotor type motor. The motor 61 has two rotors, a first rotor 300A and a second rotor 300B. The first rotor 300A and the second rotor 300B are arranged in the axial direction AD with the stator 200 interposed therebetween. The motor 61 is sometimes referred to as a double axial motor.

[0045] The shaft 340 supports the rotor 300. The shaft 340 rotates together with the rotor 300 about the motor axis Cm. The center line of the shaft 340 coincides with the motor axis Cm. The shaft 340 connects the rotor 300 and the propeller 20.

[0046] The shaft 340 is rotatably supported by a rear bearing 350 and a drive bearing 360. The bearings 350, 360 are included in the motor device 60. The bearings 350, 360 extend annularly in the circumferential direction CD. The rear bearing 350 and the drive bearing 360 are aligned in the axial direction AD via the rotor 300. The bearings 350, 360 are fixed to the motor housing 70. The rear bearing 350 is fixed to the rear frame 370. The drive bearing 360 is fixed to the drive frame 390.

[0047] The motor housing 70 accommodates the stator 200 and the rotor 300. In the motor housing 70, a motor outer peripheral wall 71 covers the stator 200 and the rotor 300 from the outer periphery. The motor housing 70 corresponds to an electric machine housing. The motor outer peripheral wall 71 corresponds to an electric machine outer peripheral wall.

[0048] The rotor 300 has magnet sections 310 and magnet holders 320. A plurality of magnet sections 310 are arranged in the circumferential direction CD in each rotor 300. The magnet sections 310 include permanent magnets and form a field magnet. In the rotor 300, the magnet sections 310 generate magnetic flux. The magnet sections 310 of the first rotor 300A and the magnet sections 310 of the second rotor 300B are arranged in the axial direction AD via the stator 200. The magnet holders 320 support the magnet sections 310. The magnet holders 320 form the outer and inner peripheral ends of the rotor 300.

[0049] The stator 200 has a coil portion 211 and a core 231. The coil portion 211 is formed of an electric wire such as a rectangular wire, and is capable of carrying electricity. The coil portion 211 is wound around the core 231. The coil portion 211 is formed in a cylindrical shape as a whole, and extends in the axial direction AD. The core 231 is an iron core, and also extends in the axial direction AD. A plurality of the coil portions 211 and the cores 231 are arranged in the circumferential direction CD along the housing inner circumferential surface 70b. In the stator 200, a coil 64 is formed by a plurality of the coil portions 211.

[0050] The stator 200 has a core piece 210. The core piece 210 is formed to include a coil portion 211 and a core 231. The core piece 210 is a component in which the coil portion 211 and the core 231 are integrated. The core piece 210 is sometimes referred to as a coil piece. In the stator 200, a plurality of core pieces 210 are arranged in the circumferential direction CD, and thus a plurality of coil portions 211 are arranged in the circumferential direction CD.

[0051] In the stator 200, core piece boundaries 216 are aligned in the circumferential direction CD. The core piece boundary 216 is the boundary between two core pieces 210 adjacent to each other in the circumferential direction CD. The core piece boundary 216 is also the boundary between two coil portions 211 adjacent to each other in the circumferential direction CD. The core piece boundary 216 corresponds to a coil portion boundary. When a gap is formed between two core pieces 210, the area including the gap is referred to as the core piece boundary 216. Note that two core pieces 210 adjacent to each other in the circumferential direction CD may be simply referred to as two core pieces 210. Also, two coil portions 211 adjacent to each other in the circumferential direction CD may be simply referred to as two coil portions 211.

[0052] The coil portion 211 is wound around the core 231 via a bobbin 240. The bobbin 240 is included in the core piece 210. The core piece 210 is a component in which the coil portion 211, the core 231, and the bobbin 240 are integrated. The bobbin 240 is made of a resin material or the like and has electrical insulation properties. The bobbin 240 is formed into a cylindrical shape as a whole and extends in the axial direction AD. The bobbin 240 houses at least a portion of the core 231 so as to cover the outer peripheral surface of the core 231.

[0053] As shown in Figures 5 and 6, the stator 200 has a core piece group 215. The core piece group 215 has a plurality of coil portions 211. The core piece group 215 includes all of the coil portions 211 that the stator 200 has. The core piece group 215 is an assembly of a plurality of coil portions 211. The core piece group 215 extends annularly in the circumferential direction CD along the housing inner circumferential surface 70b.

[0054] In the core piece group 215, a group outer peripheral edge 215a and a group inner peripheral edge 215b extend annularly in the circumferential direction CD. The group outer peripheral edge 215a is the outer peripheral edge of the core piece group 215 and extends annularly in the circumferential direction CD. The group outer peripheral edge 215a is the outer peripheral edge of the core piece group 215. It extends annularly in the circumferential direction CD. The group outer peripheral edge 215a is the outer peripheral edge of the area where the multiple core pieces 210 are accommodated. The group outer peripheral edge 215a includes the outermost peripheral surfaces of the core pieces 210 in the radial direction RD. The group outer peripheral edge 215a extends along an imaginary line connecting the radially outer ends of each of two core pieces 210 adjacent in the circumferential direction CD. The group inner peripheral edge 215b is the inner peripheral edge of the core piece group 215 and extends annularly in the circumferential direction CD. The group inner peripheral edge 215b is the inner peripheral edge of the area where the multiple core pieces 210 are accommodated. The inner-group peripheral edge 215b extends along an imaginary line connecting the radially inner ends of two core pieces 210 adjacent to each other in the circumferential direction CD.

[0055] As shown in Figures 4 and 5, the motor device 60 has a core piece support portion 280. The core piece support portion 280 supports the core piece 210. The core piece support portion 280 supports the core piece 210, and thereby supports the coil portion 211. The core piece support portion 280 corresponds to the coil support portion. The core piece support portion 280 is fixed to the motor housing 70. For example, the core piece support portion 280 is fixed to the motor outer peripheral wall 71. The core piece 210 is fixed to the motor outer peripheral wall 71 via the core piece support portion 280.

[0056] The core piece support part 280 has a first support plate 281a, a second support plate 281b, and a support pole 291. The support plates 281a and 281b are made of a resin material or the like and have electrical insulation properties. For example, the support plates 281a and 281b are made of GFRP or AFRP. GFRP is glass fiber reinforced plastic. AFRP is aramid fiber reinforced plastic.

[0057] As shown in FIGS. 4, 5, and 7, the support plates 281a and 281b are formed in a plate shape and extend in a direction perpendicular to the axial direction AD. The first support plate 281a and the second support plate 281b are arranged in the axial direction AD with the core piece 210 sandwiched between them. The support plates 281a and 281b support the core piece 210. The support plates 281a and 281b are stacked on the core piece 210 from the axial direction AD. The first support plate 281a is hooked onto the core piece 210 from one side in the axial direction AD. The second support plate 281b is hooked onto the core piece 210 from the other side in the axial direction AD. The support plates 281a and 281b correspond to support plate portions. 7 shows a plan view of the first support plate 281a, and does not show a plan view of the second support plate 281b.

[0058] The support plates 281a, 281b are hooked onto the core piece 210, and are thereby arranged to be hooked onto the coil portion 211. Configurations in which the support plates 281a, 281b are hooked onto the coil portion 211 include a configuration in which the support plates 281a, 281b are directly hooked onto the coil portion 211, and a configuration in which they are indirectly hooked onto the coil portion 211. An example of a configuration in which the support plates 281a, 281b are indirectly hooked onto the coil portion 211 is a configuration in which the support plates 281a, 281b are hooked onto the coil portion 211 via the core 231 or the bobbin 240. In this configuration, the support plates 281a, 281b are hooked onto the core 231 or the bobbin 240.

[0059] The support pole 291 shown in FIG. 4 extends in a columnar shape in the axial direction AD. The support pole 291 is provided radially inward of the core piece 210. For example, the support pole 291 is located at a distance radially inward from the core piece 210. In the radial direction RD, the core piece 210 is located between the support pole 291 and the motor outer peripheral wall 71. A plurality of support poles 291 are arranged in the circumferential direction CD. The support poles 291 are formed from a resin material or the like and have electrical insulation properties. Note that the support poles 291 are not shown in FIG. 5.

[0060] The first support plate 281a and the second support plate 281b are connected to each other by the motor outer peripheral wall 71 and the support pole 291. The first support plate 281a and the second support plate 281b are fixed to the motor outer peripheral wall 71 on the outer periphery side of the core piece 210. The first support plate 281a and the second support plate 281b are fixed to the support pole 291 on the inner periphery side of the core piece 210. The support plates 281a and 281b are pressed against the core piece 210 in the axial direction AD, thereby supporting the coil portion 211 by sandwiching it therebetween.

[0061] The support pole 291 connects the first support plate 281a and the second support plate 281b. The support pole 291 corresponds to a connecting member. The support pole 291 is provided between the first support plate 281a and the second support plate 281b. The support plates 281a and 281b are provided with pole holes 285d (see FIG. 7). The pole holes 285d are fixing holes. The support plates 281a and 281b are fixed to the support pole 291 using the pole holes 285d. A plurality of pole holes 285d are arranged in the circumferential direction CD.

[0062] The motor housing 70 has an inner-wall protrusion 73 as a portion for fixing the first support plate 281a and the second support plate 281b. As shown in FIGS. 4 and 6, the inner-wall protrusion 73 is a protrusion provided on the housing inner circumferential surface 70b. The inner-wall protrusion 73 protrudes inward from the motor outer circumferential wall 71. The inner-wall protrusion 73 extends annularly in the circumferential direction CD. The inner-wall protrusion 73 is provided at a position spaced apart from the rear frame 370 and the drive frame 390 in the axial direction AD. At least a portion of the inner-wall protrusion 73 is aligned with the motor fins 72 in the radial direction RD.

[0063] The intra-wall protrusion 73 is provided between the first support plate 281a and the second support plate 281b. The first support plate 281a and the second support plate 281b are fixed to the intra-wall protrusion 73 with the intra-wall protrusion 73 sandwiched between them. The first support plate 281a is placed on one end surface of the intra-wall protrusion 73. The second support plate 281b is placed on the other end surface of the intra-wall protrusion 73. The intra-wall protrusion 73 is a receiving portion that receives the support plates 281a, 281b. The support plates 281a, 281b are provided with outer peripheral wall holes 285c (see FIG. 7). The outer peripheral wall holes 285c are fixing holes. The support plates 281a, 281b are fixed to the intra-wall protrusion 73 using the outer peripheral wall holes 285c.

[0064] The support plates 281a, 281b are fixed to the intra-wall protrusion 73 by wall fasteners 294 (see FIG. 5). The wall fasteners 294 are fasteners such as bolts. The intra-wall protrusion 73 has a convex fixing hole 74a formed therein. The convex fixing hole 74a is formed on the end surface of the intra-wall protrusion 73. The wall fasteners 294 are fixed to the intra-wall protrusion 73 by being screwed into the convex fixing hole 74a via the outer peripheral wall hole 285c, for example.

[0065] As shown in FIG. 6, the intra-wall protrusion 73 has a protruding fixing portion 74 and a protruding connecting portion 75. The protruding fixing portion 74 is a portion of the intra-wall protrusion 73 where a protruding fixing hole 74a is formed. A plurality of the protruding fixing portions 74 are arranged in the circumferential direction CD. The protruding fixing portion 74 is provided at a position aligned with the core piece boundary 216 in the radial direction RD. The protruding fixing portion 74 extends radially inward from the group outer peripheral edge 215a toward the core piece boundary 216. The protruding fixing portion 74 corresponds to a protruding fixing portion.

[0066] The protruding fixing holes 74a are provided radially outward from the group outer peripheral edge 215a. Note that at least a portion of the protruding fixing holes 74a may be provided radially inward from the group outer peripheral edge 215a.

[0067] The convex connecting portion 75 is provided between two adjacent convex fixing portions 74 in the circumferential direction CD. The convex connecting portion 75 extends in the circumferential direction CD and connects the two adjacent convex fixing portions 74 in the circumferential direction CD. The convex connecting portion 75 is bridged between the two adjacent convex fixing portions 74 in the circumferential direction CD. The convex connecting portion 75 corresponds to a bridge portion. The convex connecting portion 75 is provided at a position spaced radially outward from the group outer peripheral edge 215a. The protruding dimension of the convex connecting portion 75 from the housing inner circumferential surface 70b is smaller than the protruding dimension of the convex fixing portion 74 from the housing inner circumferential surface 70b.

[0068] The convex fixing portions 74 and the convex connecting portions 75 are arranged alternately in the circumferential direction CD. The support plates 281a and 281b are placed on the end faces of the convex fixing portions 74 and the convex connecting portions 75 from the axial direction AD.

[0069] As shown in Figures 5 and 7, the support plates 281a, 281b have core holes 285a. The core holes 285a penetrate the support plates 281a, 281b in the axial direction AD. A plurality of the core holes 285a are arranged in the circumferential direction CD. The core holes 285a are provided between the outer peripheral wall holes 285c and the pole holes 285d in the radial direction RD. The core piece 210 is fitted into the core holes 285a. In the core piece 210, at least the core 231 is fitted into the core holes 285a.

[0070] 4 and 5, the core piece 210 is exposed to the rotor 300 side through the core hole 285a. In the core piece 210, at least the core 231 is exposed to the rotor 300 side through the core hole 285a. The support plates 281a and 281b do not protrude further toward the rotor 300 than the core 231. In this way, the thickness dimension of the axial gap 305 in the axial direction AD corresponds to the distance between the core 231 and the rotor 300.

[0071] 8, the core 231 has a core body 232 and a core extension portion 233. The core body 232 is a portion of the core 231 that is housed in the bobbin 240. The core extension portion 233 is a portion of the core 231 that protrudes from the bobbin 240 in the axial direction AD. The core extension portion 233 extends from the core body 232 in the axial direction AD. The core extension portions 233 are arranged in pairs in the axial direction AD with the core body 232 sandwiched between them.

[0072] In the core 231, the core extension portion 233 fits into the core hole 285a. The core extension portion 233 has an extension protrusion 233a and an extension base 233b. The extension base 233b is provided on the core body 232. The extension protrusion 233a extends from the extension base 233b in the axial direction AD. The extension protrusion 233a is a protrusion provided on the extension base 233b. The extension base 233b protrudes from the extension protrusion 233a on both sides in the circumferential direction CD. A step surface is formed by a portion of the extension base 233b protruding from the extension protrusion 233a in this way.

[0073] The support plates 281a, 281b are placed on the extension base 233b with the extension protrusion 233a inserted into the core hole 285a. The extension protrusion 233a fits inside the core hole 285a. The extension protrusion 233a prevents the support plates 281a, 281b from shifting in a direction perpendicular to the axial direction AD. The support plates 281a, 281b are supported by the stepped surface of the extension base 233b. The support plates 281a, 281b are pressed against the extension base 233b in the axial direction AD.

[0074] As shown in FIG. 4 , the motor device 60 has a bus bar unit 260. The bus bar unit 260 extends annularly in the circumferential direction CD. The bus bar units 260 are arranged on the stator 200 in the radial direction RD. The bus bar unit 260 has a power bus bar 261 and a bus bar protection portion 270. The power bus bar 261 and the bus bar protection portion 270 extend annularly in the circumferential direction CD. The power bus bar 261 is formed of a bus bar member or the like. The power bus bar 261 forms at least a part of the output line 143. The bus bar protection portion 270 is formed of a resin material or the like and has electrical insulation properties. The bus bar protection portion 270 covers and protects the power bus bar 261.

[0075] Bus bar unit 260 is fixed to rear frame 370 by fasteners such as screws. Bus bar unit 260 is provided on the opposite side of rear frame 370 from stator 200.

[0076] In the motor device 60, the coil portion 211 and the power bus bar 261 are electrically connected. The coil portion 211 and the power bus bar 261 are electrically connected via a coil lead wire 212 and a bus bar lead wire 265. The coil lead wire 212 and the bus bar lead wire 265 are electrically connected. The lead wires 212 and 265 are included in the motor device 60.

[0077] The bus bar lead wires 265 are formed of electric wires such as rectangular wires, and are led out from the power bus bar 261. The bus bar lead wires 265 are included in the bus bar unit 260. The bus bar lead wires 265 are arranged in a plurality in the circumferential direction CD. The bus bar lead wires 265 form at least a part of the output lines 143.

[0078] The coil lead wires 212 are formed of electric wires such as rectangular wires, and are led out from the coil portion 211. A plurality of the coil lead wires 212 are arranged in the circumferential direction CD. The coil lead wires 212 form at least a part of the output line 143.

[0079] The coil lead wires 212 are drawn out to the power bus bar 261 side through rear wiring holes 373 of the rear frame 370. The rear wiring holes 373 are holes provided in the rear frame 370. The rear wiring holes 373 penetrate the rear frame 370 in the axial direction AD. A plurality of rear wiring holes 373 are arranged in the circumferential direction CD along the outer periphery of the rear frame 370.

[0080] The coil lead wires 212 are led out to the rear frame 370 side through lead insertion portions 286 (see FIG. 7) of the first support plate 281a. As shown in FIG. 7, the lead insertion portions 286 are provided in the first support plate 281a. The lead insertion portions 286 penetrate the first support plate 281a in the axial direction AD. The lead insertion portions 286 are recesses provided in the outer peripheral end of the first support plate 281a. The lead insertion portions 286 are provided at positions aligned with the inner-wall protrusions 73 in the axial direction AD. By passing the coil lead wires 212 through the lead insertion portions 286, the coil lead wires 212 pass between the first support plate 281a and the motor outer peripheral wall 71. A plurality of lead insertion portions 286 are arranged in the circumferential direction CD. The lead-out insertion portion 286 is provided at a position spaced apart in the circumferential direction CD from the outer peripheral wall hole 285c and the core piece boundary 216. The lead-out insertion portion 286 corresponds to the wire-passing portion, and the first support plate 281a corresponds to the wire-passing plate portion.

[0081] 4 is fixed to the intra-wall protrusion 73. For example, the coil lead wire 212 passes through the inside of the intra-wall protrusion 73 and is led out from the lead insertion portion 286 to the rear frame 370 side. The intra-wall protrusion 73 has a hole or a groove for passing the coil lead wire 212 therethrough.

[0082] The support plates 281a, 281b contact the motor outer peripheral wall 71 from the inner peripheral side, thereby preventing misalignment in the radial direction RD. The outer peripheral end face of the support plate 281a is provided to overlap the housing inner peripheral surface 70b. For example, in the first support plate 281a, the tip end of the outer peripheral protrusion 287 contacts the housing inner peripheral surface 70b, thereby preventing the first support plate 281a from misaligning in the radial direction RD. The outer peripheral protrusion 287 is a portion of the first support plate 281a between two adjacent drawer insertion portions 286 in the circumferential direction CD.

[0083] As shown in FIGS. 5 and 9 , the motor device 60 has a grommet 410 as a lead wire protector. The grommet 410 protects the coil lead wire 212. The grommet 410 is provided at a position where the coil lead wire 212 passes through the first support plate 281a. The grommet 410 is provided so as to cover the coil lead wire 212 from the outer periphery side of the coil lead wire 212. The grommet 410 is provided between the coil lead wire 212 and the first support plate 281a, the motor outer periphery wall 71, and the in-wall protrusion 73. The grommet 410 extends along the coil lead wire 212 toward the rear frame 370 beyond the first support plate 281a. The grommet 410 extends along the coil lead wire 212 toward the coil portion 211 beyond the first support plate 281a and the in-wall protrusion 73. Grommet 410 is made of a resin material or the like and has electrical insulation properties.

[0084] The grommet 410 fills the gaps between the motor outer peripheral wall 71, the inner-wall protrusion 73, the first support plate 281a, and the coil lead wire 212. Therefore, the grommet 410 can suppress vibration of the coil lead wire 212 relative to the motor outer peripheral wall 71, the inner-wall protrusion 73, the first support plate 281a, etc. Therefore, the grommet 410 can improve the reliability of the coil lead wire 212 against vibrations generated in the motor device 60.

[0085] 9 and 10 , the multiple core pieces 210 include a core piece 210 provided for each of the multiple phases. For example, the multiple core pieces 210 include a U-phase core piece 210U provided for the U-phase, a V-phase core piece 210V provided for the V-phase, and a W-phase core piece 210W provided for the W-phase. U-phase core piece 210U has a U-phase coil portion 211 and forms at least a part of U-phase coil 64. V-phase core piece 210V has a V-phase coil portion 211 and forms at least a part of V-phase coil 64. W-phase core piece 210W has a W-phase coil portion 211 and forms at least a part of W-phase coil 64.

[0086] The core pieces 210 are provided such that a plurality of sets are arranged in the circumferential direction CD, with each set consisting of a core piece 210 for each of the multiple phases. In one set, at least one core piece 210 for each of the multiple phases is arranged in the circumferential direction CD. In one set, the number of core pieces 210 for each of the multiple phases is the same. The arrangement order of the core pieces 210 for each of the multiple phases is the same in the multiple sets. For example, in one set, two U-phase core pieces 210U, two V-phase core pieces 210V, and two W-phase core pieces 210W are arranged in order in the circumferential direction CD.

[0087] In one set, one each of the U-phase core piece 210U, V-phase core piece 210V, and W-phase core piece 210W are connected to one another by a neutral lead wire 213 and a neutral bus bar 220. The neutral lead wire 213 and the neutral bus bar 220 electrically connect the U-phase core piece 210U, the V-phase core piece 210V, and the W-phase core piece 210W. At least one of the neutral lead wire 213 and the neutral bus bar 220 forms a neutral point 65. A plurality of the neutral lead wires 213 and the neutral bus bars 220 are arranged in the circumferential direction CD.

[0088] The neutral lead wire 213 is drawn out toward the inner periphery from each of the U-phase core piece 210U, V-phase core piece 210V, and W-phase core piece 210W in one set. The neutral lead wire 213 is formed of an electric wire such as a rectangular wire. The neutral bus bar 220 is formed of a bus bar member or the like. The neutral bus bar 220 is provided on the inner periphery of the core pieces 210U, 210V, and 210W. The neutral bus bar 220 extends in the circumferential direction CD so as to span the U-phase core piece 210U, the V-phase core piece 210V, and the W-phase core piece 210W. Note that at least two neutral lead wires 213 may be connected directly without the neutral bus bar 220.

[0089] In the stator 200, two core pieces 210 of the same phase that are adjacent to each other in the circumferential direction CD are connected to each other by a connection lead wire 214. The connection lead wire 214 forms at least a part of the coil 64. The connection lead wire 214 is drawn out from the core piece 210 toward the inner periphery. The connection lead wire 214 is formed of an electric wire such as a rectangular wire. A plurality of the connection lead wires 214 are arranged in the circumferential direction CD. At least two connection lead wires 214 may be directly connected to each other, or may be indirectly connected to each other via a bus bar member or the like.

[0090] As shown in Fig. 9, the stator 200 has a core piece module 250. The core piece module 250 is formed to include a plurality of core pieces 210. The core piece module 250 is a component in which a plurality of core pieces 210 are modularized. In addition to the plurality of core pieces 210, the core piece module 250 also includes a coil lead wire 212, a neutral lead wire 213, a connection lead wire 214, and a neutral bus bar 220.

[0091] The core piece module 250 includes at least one core piece 210 for each of the multiple phases. For example, the core piece module 250 includes the same number of core pieces 210 for each of the three phases. The number of core pieces 210 included in the core piece module 250 is a natural number multiple of three. For example, the core piece module 250 includes six core pieces 210. The core piece module 250 forms one set of core pieces 210. For example, the core piece module 250 includes two U-phase core pieces 210U, two V-phase core pieces 210V, and two W-phase core pieces 210W.

[0092] The core piece module 250 has multiple core pieces 210 and therefore multiple coil sections 211. In the core piece module 250, the multiple coil sections 211 are arranged in the circumferential direction CD. The circumferential direction CD is the direction in which the multiple coil sections 211 are arranged and corresponds to a predetermined direction. The core piece module 250 is also a component in which the multiple coil sections 211 are modularized. For example, the number of coil sections 211 included in the core piece module 250 is a natural number multiple of 3. The core piece module 250 corresponds to a coil module.

[0093] In the core piece module 250, a plurality of core pieces 210 are fixed to one another. In the core piece module 250, two adjacent core pieces 210 in the circumferential direction CD are fixed by an adhesive film 255. The adhesive film 255 is included in the core piece module 250. The adhesive film 255 is provided between the two adjacent core pieces 210 in the circumferential direction CD. The adhesive film 255 bonds the two adjacent core pieces 210 in the circumferential direction CD together. The adhesive film 255 is made of a resin material or the like. The adhesive film 255 is an adhesive material that bonds the two core pieces 210 together. The adhesive film 255 corresponds to a regulating adhesive portion.

[0094] The adhesive film 255 is provided between the two core pieces 210, and is therefore provided between the two coil portions 211. In other words, the adhesive film 255 is interposed between the two coil portions 211. The adhesive film 255 restricts relative movement of one of the two core pieces 210 adjacent to each other in the circumferential direction CD via the adhesive film 255. The adhesive film 255 restricts movement of the coil portions 211 by restricting movement of the core pieces 210. The adhesive film 255 restricts movement of one of the two core pieces 210 relative to the other in the circumferential direction CD. For example, the adhesive film 255 restricts movement of one of the two core pieces 210 relative to the other in any of the circumferential direction CD, axial direction AD, and radial direction RD. The adhesive film 255 corresponds to an interposition restricting portion.

[0095] 10, the core piece 210 has an end face 210a, a side face 210b, and an opposing face 210c. The end face 210a, the side face 210b, and the opposing face 210c are included in the outer surface of the core piece 210. The outer surface of the core piece 210 is formed by the coil portion 211, the core 231, the bobbin 240, etc. For example, the side face 210b and the opposing face 210c are formed by the coil portion 211.

[0096] The end faces 210a extend in a direction perpendicular to the axial direction AD and are arranged in pairs in the axial direction AD. The side faces 210b extend in a direction perpendicular to the radial direction RD and are arranged in pairs in the radial direction RD. The side faces 210b may be curved so as to bulge outward from the outer periphery of the coil portion 211.

[0097] The opposing surfaces 210c extend in the axial direction AD perpendicular to the circumferential direction CD, and are arranged in pairs in the circumferential direction CD. The opposing surfaces 210c extend in the axial direction AD so as to span between a pair of end faces 210a. The opposing surfaces 210c extend in the radial direction RD so as to span between a pair of side faces 210b. In two core pieces 210 adjacent in the circumferential direction CD, the two opposing surfaces 210c face each other across a core piece boundary 216. The two opposing surfaces 210c facing each other across the core piece boundary 216 extend parallel to each other.

[0098] The adhesive film 255 extends in a film-like shape in a direction perpendicular to the circumferential direction CD. The adhesive film 255 is formed to include a film-like film member. The adhesive film 255 may be referred to as a sheet-like member or a plate-like member. The adhesive film 255 is provided at the core piece boundary 216. The adhesive film 255 is provided between two opposing surfaces 210c that face each other across the core piece boundary 216. The adhesive film 255 is adhered to each of the two opposing surfaces 210c. The adhesive film 255 extends along the opposing surfaces 210c.

[0099] The adhesive film 255 is provided so as to overlap almost the entire opposing surface 210c. For example, the adhesive film 255 extends in the axial direction AD along the opposing surface 210c so as to span the pair of end surfaces 210a. The adhesive film 255 extends in the radial direction RD along the opposing surface 210c so as to span the pair of side surfaces 210b. Note that the adhesive film 255 may be provided at a position away from the end surface 210a in the axial direction AD, or at a position away from the side surfaces 210b in the radial direction RD.

[0100] Adhesive film 255, which is a film member, has adhesive surfaces on both the front and back sides. Adhesive film 255 is formed of double-sided tape or the like. As shown in FIG. 11 , adhesive film 255 has a film layer 256 and an adhesive layer 257. Film layer 256 is formed of a film-like base material. The base material is formed of a resin material or the like. Adhesive layer 257 is formed of a resin material or the like and has adhesiveness and stickiness. Adhesive layer 257 forms the adhesive surface of adhesive film 255. Adhesive layer 257 is provided on each of the front and back sides of film layer 256.

[0101] As shown in Figures 6 and 10, the stator 200 has a plurality of core piece modules 250. The plurality of core piece modules 250 are arranged in the circumferential direction CD along the housing inner peripheral surface 70b. For example, eight core piece modules 250 are arranged in the circumferential direction CD, similar to the set of core pieces 210. Two core piece modules 250 adjacent to each other in the circumferential direction CD are not bonded together with an adhesive film 255. No adhesive film 255 is provided between the two core piece modules 250. In other words, no adhesive film 255 is provided at the boundary between the two core piece modules 250. Note that two core piece modules 250 adjacent to each other in the circumferential direction CD may be simply referred to as two core piece modules 250.

[0102] The multiple core piece boundaries 216 include a first boundary 216a and a second boundary 216b. The first boundary 216a is a core piece boundary 216 provided with an adhesive film 255. The first boundary 216a is included in the core piece module 250. All of the core piece boundaries 216 formed in the core piece module 250 are first boundaries 216a. For example, in the core piece module 250, multiple first boundaries 216a are arranged in the circumferential direction CD.

[0103] The second boundary 216b is a core piece boundary 216 where no adhesive film 255 is provided. The second boundary 216b is a boundary between two core piece modules 250 adjacent in the circumferential direction CD. For example, in the stator 200, a plurality of second boundaries 216b are arranged in the circumferential direction CD. At least one first boundary 216a exists between two second boundaries 216b adjacent in the circumferential direction CD. For example, five first boundaries 216a exist between two second boundaries 216b.

[0104] As shown in FIG. 12, in the motor 61, 360° of the mechanical angle θm is shared by multiple core piece modules 250. For example, when a specific portion of the rotor 300 rotates through 360°, that specific portion passes through all of the core piece modules 250. The mechanical angle θmc shared by one core piece module 250 is 360° divided by the number of core piece modules 250. In the motor 61, the electrical angle θe corresponds to the mechanical angle θmc of the core piece module 250. Note that the mechanical angles θm, θmc and the electrical angle θe may be expressed in degrees.

[0105] In motor 61, the value obtained by converting the mechanical angle θmc of core piece module 250 into the electrical angle θe is a natural number multiple of 360°. For example, the value obtained by converting the mechanical angle θmc of core piece module 250 into the electrical angle θe is 360°. In motor 61, the number of core piece modules 250 included in stator 200 and the number of core pieces 210 included in each core piece module 250 are set so that the mechanical angle θmc of the core piece module 250 corresponds to a natural number multiple of 360°.

[0106] In the motor 61, the greater the load F [N] applied to the core piece 210 as the motor 61 is driven, the more likely the core piece 210 is to vibrate. In other words, the smaller the load F, the less vibration the core piece 210 will experience. The load F includes an axial load Fad, a circumferential load Fcd, and a radial load Frd. The axial load Fad is a load F applied to the core piece 210 in the axial direction AD. The circumferential load Fcd is a load F applied to the core piece 210 in the circumferential direction CD. The radial load Frd is a load F applied to the core piece 210 in the radial direction RD.

[0107] In this embodiment, as described above, one core piece module 250 has six core pieces 210. That is, the six core pieces 210 are integrated together by the adhesive film 255. In contrast to this, for example, consider Comparative Example 1, which differs from this embodiment in that the adhesive film 255 is not provided on any of the core pieces 210 of the stator 200. Also consider Comparative Example 2, in which two core pieces 210 are integrated together by the adhesive film 255. In Comparative Example 2, one core piece module 250 has two core pieces 210.

[0108] In this embodiment, the six core pieces 210 are integrated with the adhesive film 255, and therefore the load F applied to the core pieces 210 is more likely to be reduced than in either of the first and second comparative examples.

[0109] For example, as shown in Fig. 13, the circumferential load Fcd in core piece module 250 is smaller than both the circumferential load Fcd in comparative example 1 and the circumferential load Fcd in comparative example 2. In particular, the second-order component of the circumferential load Fcd in core piece module 250 is an extremely small value compared to the second-order components of the circumferential load Fcd in comparative examples 1 and 2. In Fig. 13, the circumferential load Fcd in core piece module 250 is set to 6 cores, the circumferential load Fcd in comparative example 1 is set to 1 core, and the circumferential load Fcd in comparative example 2 is set to 2 cores. The horizontal axis represents the order n of the frequency related to the load F.

[0110] As shown in Fig. 14, the axial load Fad in the core piece module 250 is smaller than both the axial load Fad in Comparative Example 1 and the axial load Fad in Comparative Example 2. In particular, the second-order component of the axial load Fad in the core piece module 250 is an extremely small value compared to the second-order components of the axial load Fad in Comparative Examples 1 and 2. In Fig. 14, the axial load Fad in the core piece module 250 is set to 6 cores, the axial load Fad in Comparative Example 1 is set to 1 core, and the axial load Fad in Comparative Example 2 is set to 2 cores.

[0111] Next, a method for manufacturing the motor device 60 will be described. The manufacturing process for manufacturing the motor device 60 will be described with reference to the flowchart in Fig. 15. The manufacturing method for the motor device 60 corresponds to the manufacturing method for a rotating electric machine.

[0112] 15, a worker performs manufacturing steps for manufacturing stator 200, including steps P101 to P105. In step P101, the worker makes preparations for manufacturing stator 200. The worker prepares parts and members for manufacturing stator 200. For example, the worker prepares motor outer peripheral wall 71, rear frame 370, drive frame 390, core piece 210, neutral bus bar 220, adhesive film 255, support plates 281a and 281b, and support pole 291. Step P101 is sometimes referred to as a preparation step.

[0113] In process P102, a worker performs assembly work to assemble the core piece module 250. The assembly work includes work to adhere multiple core pieces 210 with adhesive film 255, work to attach neutral bus bars 220 to multiple core pieces 210, and work to connect connection leads 214 of the same phase. For example, the worker peels off the release paper from one side of adhesive film 255 and attaches the adhesive film 255 to the opposing surface 210c of one of two core pieces 210. Then, the worker peels off the release paper from the other side of adhesive film 255 and attaches the opposing surface 210c of the other of the two core pieces 210 to the adhesive film 255. Note that the core pieces 210 used in assembling the core piece module 250 have the coil lead wires 212, neutral lead wires 213, and connection lead wires 214 already drawn out. Process P102 corresponds to the module process.

[0114] In steps P103 to P105, the worker fixes the core piece module 250 to the housing 70. The worker installs the core piece module 250 and the support plates 281a and 281b inside the motor outer peripheral wall 71. For example, in step P103, the worker installs the first support plate 281a inside the motor outer peripheral wall 71. The worker fixes the first support plate 281a to the motor outer peripheral wall 71 using wall fasteners 294 or the like.

[0115] In step P104, the worker installs the core piece module 250 inside the motor outer peripheral wall 71. The worker lines up the multiple core piece modules 250 along the motor outer peripheral wall 71 and the first support plate 281a. The worker does not perform the task of bonding two adjacent core piece modules 250 in the circumferential direction CD with the adhesive film 255. Step P104 corresponds to the installation step.

[0116] In process P105, the worker installs the second support plate 281b inside the motor outer peripheral wall 71. The worker fixes the second support plate 281b to the motor outer peripheral wall 71 using a wall fastener 294 or the like. The worker also creates the core piece support part 280 by connecting the first support plate 281a and the second support plate 281b with the support pole 291.

[0117] In steps P103 and P105, the worker fixes the core piece module 250 to the motor outer peripheral wall 71 using the core piece support part 280. Steps P103 and P105 correspond to fixing steps. Note that the worker may perform steps P104 and P103 after step P105, or may perform steps P103 and P105 after step P104.

[0118] According to the present embodiment described so far, the adhesive film 255 is provided between two coil portions 211 adjacent to each other in the circumferential direction CD, and prevents one of these coil portions 211 from moving relative to the other in the circumferential direction CD. In this configuration, the adhesive film 255 prevents one of the two coil portions 211 from vibrating relative to the other in the circumferential direction due to, for example, the driving of the motor 61. Furthermore, in this configuration, even if pulsation occurs in one of the two coil portions 211 due to, for example, the vibration of the motor 61, it is possible to prevent the pulsation from being transmitted to the other and to attenuate the pulsation transmitted from one to the other. Therefore, it is possible to suppress vibration of the coil portions 211 in the motor device 60.

[0119] Furthermore, the core piece support portion 280 supports the coil portion 211 while spanning it and the motor housing 70. In this configuration, the core piece support portion 280 can firmly fix the coil portion 211 to the motor housing 70. This makes it possible to suppress displacement or vibration of the coil portion 211 relative to the motor housing 70.

[0120] According to this embodiment, the adhesive film 255 bonds two coil portions 211 adjacent to each other in the circumferential direction CD. In this configuration, the relative movement of one of the two coil portions 211 with respect to the other is restricted in each of the circumferential direction CD, the axial direction AD, and the radial direction RD. This enhances the vibration suppression effect of suppressing vibration of one of the two coil portions 211 with respect to the other.

[0121] According to this embodiment, the adhesive film 255 has a film member. In this configuration, the two coil portions 211 can be bonded by attaching the adhesive film 255 to each of the two coil portions 211. Therefore, in the manufacturing process of the motor device 60, when the two coil portions 211 are bonded together, the worker does not need to wait until the molten adhesive solidifies. This reduces the workload when manufacturing the motor device 60 and shortens the time required to complete the motor device 60.

[0122] According to this embodiment, the multiple core piece boundaries 216 aligned in the circumferential direction CD include a first boundary 216a where the adhesive film 255 is provided and a second boundary 216b where the adhesive film 255 is not provided. In this configuration, the adhesive film 255 can suppress vibration of two coil portions 211 adjacent to each other in the circumferential direction CD across the first boundary 216a. Furthermore, in this configuration, during the manufacturing process of the motor device 60, the two coil portions 211 adjacent to each other in the circumferential direction CD across the second boundary 216b can be separately installed inside the motor housing 70. Therefore, the second boundary 216b can increase the degree of freedom in the manufacturing process of the motor device 60 using the multiple coil portions 211.

[0123] According to this embodiment, adhesive film 255 is provided so that all core piece boundaries 216 present in core piece module 250 become first boundaries 216a. With this configuration, all coil sections 211 of core piece module 250 can be integrated by adhesive film 255. Therefore, adhesive film 255 can suppress vibration of coil sections 211 in core piece module 250.

[0124] Additionally, the adhesive film 255 is provided so that the core piece boundary 216, which is the boundary between two core piece modules 250 adjacent in the circumferential direction CD, becomes the second boundary 216b. With this configuration, in the manufacturing process of the motor device 60, multiple core piece modules 250 can be separately installed inside the motor housing 70. Therefore, the second boundary 216b increases the degree of freedom in the work involved in manufacturing the motor device 60 using multiple core piece modules 250.

[0125] According to this embodiment, the number of coil portions 211 included in the core piece module 250 is a number such that the value obtained by converting the mechanical angle θmc of the core piece module 250 into the electrical angle θe is a natural number multiple of 360°. It has been discovered that, for the motor device 60, vibration of the coil portions 211 can be suppressed by using a number such that the value obtained by converting the mechanical angle θmc of the core piece module 250 into the electrical angle θe is a natural number multiple of 360°.

[0126] According to this embodiment, the number of coil portions 211 included in the core piece module 250 is a natural number multiple of 3. It has been found that for the motor device 60, vibration of the coil portions 211 can be suppressed by having the number of coil portions 211 included in the core piece module 250 be a natural number multiple of 3.

[0127] According to this embodiment, the core piece support portion 280 is provided so as to hook onto the coil portion 211 in the axial direction AD, and restricts relative movement of the coil portion 211 in the axial direction AD with respect to the motor housing 70. In this configuration, even if vibrations occur due to driving of the motor 61, the core piece support portion 280 can suppress vibration of the coil portion 211 in the axial direction AD with respect to the motor housing 70.

[0128] According to this embodiment, the support plates 281a and 281b extend in a plate-like shape in a direction perpendicular to the axial direction AD and support the coil portion 211 while being superimposed on the coil portion 211 from the axial direction AD. In this configuration, even if vibration occurs due to driving of the motor 61, the support plates 281a and 281b can suppress vibration of the coil portion 211 in the axial direction AD relative to the motor housing 70.

[0129] According to this embodiment, the motor device 60 is driven to fly the eVTOL 10. In this configuration, vibration of the coil portion 211 can be suppressed when the eVTOL 10 is flying due to the driving of the motor device 60. Therefore, the safety of the eVTOL 10 can be improved by the adhesive film 255.

[0130] According to this embodiment, in the core piece module 250, the adhesive film 255 is provided between two coil portions 211 adjacent to each other in the circumferential direction CD so as to restrict relative movement of one of the coil portions 211 in the circumferential direction CD with respect to the other. Therefore, by including the core piece module 250 in the motor device 60, vibration of the coil portions 211 can be suppressed by the core piece module 250.

[0131] According to this embodiment, in step P102 when manufacturing the motor device 60, the adhesive film 255 is provided between two coil portions 211 adjacent to each other in the circumferential direction CD so as to restrict relative movement of one of the coil portions 211 in the circumferential direction CD with respect to the other coil portion 211. In this way, by providing the adhesive film 255 between the two coil portions 211 when manufacturing the motor device 60, the adhesive film 255 can suppress vibration of the coil portions 211.

[0132] In this embodiment, the support plates 281a and 281b are electrically insulating. Therefore, in a configuration in which the support plates 281a and 281b are provided between the coil section 211 and the magnet section 310, it is possible to prevent eddy currents from being generated in the support plates 281a and 281b due to the influence of magnetic flux fluctuations in the coil section 211.

[0133] According to this embodiment, the support plates 281a, 281b are fixed to the intra-wall protrusions 73 while overlapping the intra-wall protrusions 73 from the axial direction AD. In this configuration, the support plates 281a, 281b can be fixed to the motor outer peripheral wall 71 by utilizing the intra-wall protrusions 73, which can improve the heat dissipation effect of the coil portion 211. Therefore, there is no need to provide dedicated portions for fixing the support plates 281a, 281b to the motor outer peripheral wall 71. Therefore, the intra-wall protrusions 73 can achieve both the miniaturization of the motor housing 70 and the reduction in size of the motor housing 70.

[0134] According to this embodiment, the convex fixing portion 74 is provided at a position aligned with the core piece boundary 216 in the radial direction RD. In this configuration, the dead space between the core piece boundary 216 and the motor outer peripheral wall 71 in the radial direction RD can be utilized as an area for arranging the convex fixing portion 74. That is, this dead space can be utilized as a space for mechanically fixing the support plates 281a, 281b to the intra-wall protrusions 73. Furthermore, the convex fixing portion 74 extends from the motor outer peripheral wall 71 toward the inner periphery, beyond the group outer peripheral edge 215a. This makes it easy to form the convex fixing portion 74 in a size and shape suitable for fixing the support plates 281a, 281b to the convex fixing portion 74. Furthermore, by extending radially inward toward the core piece boundary 216, the convex fixing portion 74 extends along the outer peripheral surface of the coil portion 211. This facilitates transfer of heat released from the coil portion 211 to the convex fixing portion 74. Therefore, the heat dissipation effect from the coil portion 211 to the motor outer peripheral wall 71 can be improved by the protruding fixing portion 74.

[0135] According to this embodiment, in the intra-wall protrusion 73, the protruding connecting portion 75 is bridged across two protruding fastening portions 74 that are adjacent in the circumferential direction CD. In this configuration, the support plates 281a, 281b can be supported by both the protruding fastening portions 74 and the protruding connecting portions 75. Therefore, the support strength of the motor outer peripheral wall 71 for the support plates 281a, 281b can be increased by the protruding fastening portions 74 and the protruding connecting portions 75.

[0136] According to this embodiment, the core 231 is provided so as to fit into the core holes 285a of the support plates 281a and 281b and is exposed to the rotor 300 side through the core holes 285a. With this configuration, it is possible to realize a configuration in which the support plates 281a and 281b are not present between the core 231 and the rotor 300 in the axial direction AD. In other words, it is possible to avoid the presence of the support plates 281a and 281b in the axial gap 305. Furthermore, because the core 231 is exposed to the rotor 300 through the core holes 285a, it is possible to prevent the magnetic air gap between the core 231 and the magnet section 310 from widening.

[0137] According to this embodiment, the support plates 281a, 281b are provided with lead insertion portions 286 through which the coil lead wires 212 pass. With this configuration, it is not necessary to widen the motor outer peripheral wall 71 radially outward by an amount sufficient to allow the coil lead wires 212 to pass through. Therefore, the coil lead wires 212 can be led out in the axial direction AD through the support plates 281a, 281b without increasing the size of the motor outer peripheral wall 71 in the radial direction RD.

[0138] According to the present embodiment, the first support plate 281a and the second support plate 281b support the coil portion 211 in a state in which the coil portion 211 is sandwiched between the support plates 281a and 281b. In this configuration, the coil portion 211 can be firmly supported by the pair of plates, the first support plate 281a and the second support plate 281b. Moreover, because the coil portion 211 is sandwiched between the first support plate 281a and the second support plate 281b, it is not necessary to screw the support plates 281a and 281b to the core piece 210 with fasteners such as bolts. This makes it possible to avoid restrictions on the shape and size of the core piece 210 that would be imposed by screwing fasteners to the core piece 210.

[0139] According to the present embodiment, the support pole 291 connects the first support plate 281a and the second support plate 281b. In this configuration, the support pole 291 can easily realize a configuration in which the coil portion 211 is sandwiched between the first support plate 281a and the second support plate 281b. Furthermore, in this configuration, the support pole 291 can increase the rigidity of the entire stator 200.

[0140] Second Embodiment In the first embodiment, the number of core pieces 210 included in the core piece module 250 is a natural number multiple of 3. In contrast, in the second embodiment, the number of core pieces 210 included in the core piece module 250 may be a natural number multiple of 2. Configurations, actions, and effects that are not specifically described in the second embodiment are the same as those in the first embodiment. The second embodiment will be described mainly focusing on the differences from the first embodiment.

[0141] 16, the number of core pieces 210 included in the core piece module 250 is a natural number multiple of 2. For example, the core piece module 250 includes two core pieces 210. The core piece module 250 includes a natural number multiple of 2 core pieces 210, and therefore includes a natural number multiple of 2 coil sections 211.

[0142] The multiple core pieces 210 included in a core piece module 250 do not have to form a single set of core pieces 210. For example, two core pieces 210 included in a core piece module 250 are core pieces 210 for one of the multiple phases. The multiple core piece modules 250 included in a stator 200 include a core piece module 250 that has only one core piece 210 for one of the multiple phases. For example, the multiple core piece modules 250 include a core piece module 250 that has a U-phase core piece 210U, a core piece module 250 that has a V-phase core piece 210V, and a core piece module 250 that has a W-phase core piece 210W.

[0143] In this embodiment, the two core pieces 210 are integrated with the adhesive film 255, so the load F applied to the core piece 210 is more likely to be reduced than in the above-mentioned comparative example 1. The load F in the core piece module 250 of this embodiment is assumed to be similar to the load F in the above-mentioned comparative example 2. For example, as shown in FIG. 13, the circumferential load Fcd in the core piece module 250 of this embodiment is smaller than the circumferential load Fcd in comparative example 1. Furthermore, as shown in FIG. 14, the axial load Fad in the core piece module 250 of this embodiment is smaller than the axial load Fad in comparative example 1.

[0144] <Third embodiment> In the first embodiment, the core piece support portion 280 has support plates 281a and 281b. In contrast to this, in the third embodiment, the core piece support portion 280 does not have to have support plates 281a and 281b. The configurations, actions, and effects not specifically described in the third embodiment are the same as those in the first embodiment. In the third embodiment, the differences from the first embodiment will be mainly described.

[0145] As shown in FIGS. 17 to 19, the core piece support part 280 has a first support arm 401a, a second support arm 401b, an inner circumferential member 402, and an outer circumferential member 403. The inner circumferential member 402 is made of a resin material or the like. For example, the inner circumferential member 402 is made of a non-conductive material. The inner circumferential member 402 is provided on the inner circumferential side of the core piece 210. The inner circumferential member 402 extends in the circumferential direction CD so as to be suspended between the multiple core pieces 210. For example, the inner circumferential member 402 extends in an annular shape in the circumferential direction CD. The inner circumferential member 402 extends in the axial direction AD so as to be suspended between the pair of end faces 210a. Note that the inner circumferential member 402 is not shown in FIG. 18.

[0146] The outer peripheral member 403 is made of a metal material or the like. For example, the outer peripheral member 403 is made of aluminum or the like. The outer peripheral member 403 is provided on the outer peripheral side of the core piece 210. The outer peripheral member 403 fixes the core piece support portion 280 to the motor outer peripheral wall 71. An outer peripheral member 403 is provided individually for each of the multiple core pieces 210. A plurality of outer peripheral members 403 are arranged in the circumferential direction CD along the housing inner peripheral surface 70b. The outer peripheral member 403 is fixed to the receiving protrusion 77 of the motor housing 70. Note that the outer peripheral member 403 is not shown in FIG. 17 .

[0147] The receiving protrusions 77 are provided on the motor outer peripheral wall 71. The receiving protrusions 77 are protrusions provided on the housing inner peripheral surface 70b. The receiving protrusions 77 extend from the motor outer peripheral wall 71 toward the inner peripheral side. A plurality of receiving protrusions 77 are arranged in the circumferential direction CD. The outer peripheral member 403 is fixed to the motor outer peripheral wall 71 in a state where it is inserted between two receiving protrusions 77 adjacent to each other in the circumferential direction CD. The outer peripheral member 403 is fitted between the two receiving protrusions 77. The two receiving protrusions 77 adjacent to each other in the circumferential direction CD crimp the outer peripheral member 403 between these receiving protrusions 77 from both sides in the circumferential direction CD. The outer peripheral member 403 is fixed to the motor outer peripheral wall 71 in a state where it is crimped by the two receiving protrusions 77.

[0148] The support arms 401a, 401b are made of a metal material or the like. For example, the support arms 401a, 401b are made of a steel material such as SUJ. The support arms 401a, 401b extend in the radial direction RD so as to span between the inner circumferential member 402 and the outer circumferential member 403. The support arms 401a, 401b are fixed to the inner circumferential member 402 and the outer circumferential member 403 by welding or the like. The support arms 401a, 401b are fixed to the motor outer circumferential wall 71 via the outer circumferential member 403.

[0149] The support arms 401a and 401b are individually provided for each of the multiple core pieces 210. The support arms 401a and 401b are arranged in multiple rows in the circumferential direction CD along the inner peripheral member 402. The support arms 401a and 401b support the core piece 210. The support arms 401a and 401b are fixed to the core piece 210 while being hooked onto a part of the core piece 210. For example, the support arms 401a and 401b are fixed to the core piece 210 while passing through the core piece 210 in the radial direction RD.

[0150] The support arms 401a and 401b are fixed to the core 231 while passing through the core 231 in the radial direction RD. A core hole 231a is formed in the core 231. The core hole 231a passes through the portion of the core 231 that protrudes in the axial direction AD from the coil portion 211 in the radial direction RD. The support arms 401a and 401b are inserted into the core hole 231a.

[0151] The first support arm 401a and the second support arm 401b are arranged side by side in the axial direction AD with the coil portion 211 interposed between them. The first support arm 401a is provided on the first rotor 300A side with respect to the coil portion 211. The second support arm 401b is provided on the second rotor 300B side with respect to the coil portion 211. The inner peripheral member 402 and the outer peripheral member 403 extend in the axial direction AD so as to span between the first support arm 401a and the second support arm 401b. The core piece support portion 280 supports the core piece 210 with the coil portion 211 sandwiched between the first support arm 401a and the second support arm 401b.

[0152] <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.

[0153] In each of the above embodiments, the adhesive film 255 may be provided in any manner between the two coil portions 211 as long as it bonds the two coil portions 211 adjacent to each other in the circumferential direction CD. For example, a plurality of adhesive films 255 may be arranged along the opposing surfaces 210c of the coil portions 211.

[0154] In each of the above embodiments, the regulating adhesive portion such as the adhesive film 255 may have any structure as long as it bonds the two coil portions 211 together. For example, the regulating adhesive portion does not have to be a film member. The regulating adhesive portion may be formed by solidifying a molten resin. For example, the regulating adhesive portion may be formed from a single piece of resin member or adhesive member.

[0155] In each of the above embodiments, the interstitial restriction portion, such as the adhesive film 255, does not necessarily bond the two coil portions 211 together. For example, the interstitial restriction portion may be formed to include an elastic member, such as rubber, that is elastically deformable in the circumferential direction CD. This interstitial restriction portion is capable of restricting relative movement of one of the two coil portions 211 in the circumferential direction CD with respect to the other by elastically deforming in the circumferential direction CD between the two coil portions 211. Furthermore, the interstitial restriction portion may be formed to include a member, such as a coupler, that restricts relative movement of the two coil portions 211.

[0156] In each of the above embodiments, the coil portion 211 may be formed of a coreless type component. For example, the core piece 210 may not have the core 231 as long as it has the coil portion 211.

[0157] In each of the above embodiments, the core piece support portion 280 may be provided in any manner with respect to the motor housing 70, as long as it supports the core piece 210. For example, in the above first embodiment, as long as the first support plate 281a and the second support plate 281b are connected to each other on the inner peripheral side of the core piece 210, the member connecting the first support plate 281a and the second support plate 281b does not have to be the support pole 291. Furthermore, as long as the support plates 281a and 281b are fixed to the motor outer peripheral wall 71, the first support plate 281a and the second support plate 281b do not have to be connected by the support pole 291.

[0158] In each of the above embodiments, at least a portion of the core piece support portion 280 may be divided into multiple pieces. For example, in the core piece support portion 280, the support plates 281a, 281b may be divided into multiple pieces in the circumferential direction CD. That is, the support plates 281a, 281b may be arranged in multiple pieces in the circumferential direction CD.

[0159] In each of the above embodiments, the number of coil sections 211 included in the core piece module 250 does not have to be a number such that the value obtained by converting the mechanical angle θmc of the core piece module 250 into the electrical angle θe is a natural number multiple of 360°. For example, the number of coil sections 211 included in the core piece module 250 may be a number such that the value obtained by converting the mechanical angle θmc of the core piece module 250 into the electrical angle θe is a natural number multiple of a predetermined angle. For example, the number may be a natural number multiple of 120°.

[0160] In each of the above embodiments, a resin portion such as a molded resin may be provided in the core piece 210. For example, the resin portion may be provided between the core piece 210 and the motor outer peripheral wall 71, or between the core piece 210 and the support plates 281a, 281b. The resin portion may have a function of bonding the core piece 210 to the motor outer peripheral wall 71, or may have a function of bonding the core piece 210 to the support plates 281a, 281b. Furthermore, the resin portion may have a function of transferring heat from the core piece 210 and the like to the motor outer peripheral wall 71, or may have a function of transferring heat from the core piece 210 and the like to the support plates 281a, 281b.

[0161] In each of the above embodiments, the support plate portions such as the support plates 281a, 281b may be provided in any manner as long as they support the coil portion 211. For example, a plurality of support plate portions may be arranged in the circumferential direction CD. Also, it is sufficient that at least one of a first support plate portion and a second support plate portion is provided. Also, the support plate portions do not have to extend radially inward from the coil portion 211.

[0162] In each of the above embodiments, the support plate portion may be fixed in any manner to the outer peripheral wall of the electric machine, such as the motor outer peripheral wall 71. For example, the support plate portion may be fixed to the inner peripheral surface of a wall protrusion, such as the wall inner protrusion 73. Furthermore, the support plate portion may be fixed directly to the outer peripheral wall of the electric machine without using the wall inner protrusion 73.

[0163] In each of the above embodiments, the wall protrusion may be provided in any manner as long as it protrudes from the outer peripheral wall of the electric machine. For example, a plurality of wall protrusions may be arranged in the axial direction AD or the circumferential direction CD. Furthermore, the length dimension of the wall protrusion in the axial direction AD may be smaller than the distance between the first support plate portion and the second support plate portion. In this configuration, it is preferable that a spacer member be provided between the wall protrusion and the first support plate portion and the second support plate portion in the axial direction AD. Furthermore, it is sufficient for the wall protrusion to have at least a protruding fixing portion among a protruding fixing portion such as the protruding fixing portion 74 and a bridging portion such as the protruding connecting portion 75.

[0164] In each of the above embodiments, the core hole 285a does not have to be a hole as long as it penetrates the support plate portion. For example, it may be a notch provided so as to penetrate the support plate portion.

[0165] In each of the above embodiments, the air vehicle on which the motor device 60 is mounted does not have to be a vertical take-off and landing aircraft as long as it is electrically powered. For example, the air vehicle may be an electric aircraft capable of take-off and landing with a taxiing motion. Furthermore, the air vehicle may be a rotary-wing aircraft or a fixed-wing aircraft. The air vehicle may also be an unmanned air vehicle without a crew member on board. The unmanned air vehicle may or may not have a crew member cabin 14. Furthermore, a pilot may remotely operate the air vehicle. The eVTOL 10 may be referred to as a manned air vehicle as long as it is capable of carrying a person.

[0166] In each of the above embodiments, the moving body on which the motor device 60 is mounted does not have to be an aircraft, as long as it can move by rotation of a rotating body. For example, the moving body may be a vehicle, a ship, construction machinery, or agricultural machinery. For example, if the moving body is a vehicle or construction machinery, the rotating body may be a wheel for movement, and the output shaft portion may be an axle. If the moving body is a ship, the rotating body may be a screw propeller for propulsion, and the output shaft portion may be a propeller shaft. Furthermore, the moving body may be an automated guided vehicle or an electric wheelchair. For example, an automated guided vehicle or an electric wheelchair is equipped with a relatively small motor device 60.

[0167] In each of the above embodiments, the motor device 60 does not have to be mounted on a moving object. For example, the motor device 60 may be installed in stationary equipment, machinery, or devices. In this way, the motor device 60 is not limited to being mounted on a moving object, and can be used as a drive device for various applications.

[0168] (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.

[0169] (Technical thought 1) A rotating electric machine (60) driven by energizing a coil (64), a stator (200) having a coil portion (211) that forms at least a part of the coil; a rotor (300) that rotates about 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 coil support portion (280) fixed to the electric housing and supporting the coil portion in a state of spanning the coil portion and the electric housing; an intervening restricting portion (255) provided between two adjacent coil portions in the circumferential direction (CD) of the rotation axis, restricting one of the coil portions from moving relative to the other in the circumferential direction; A rotating electric machine comprising:

[0170] (Technical thought 2) The rotating electric machine according to Technical Idea 1, wherein the interposition restricting portion has a restricting adhesive portion (255) that bonds two of the coil portions adjacent to each other in the circumferential direction.

[0171] (Technical Thought 3) The regulating adhesive portion is A rotating electric machine according to Technical Idea 2, which has a film member (255) extending in a film-like shape in a direction perpendicular to the circumferential direction and adhered to each of the two coil portions adjacent to each other in the circumferential direction.

[0172] (Technical Thought 4) A plurality of coil portion boundaries (216) that are boundaries between two of the coil portions adjacent in the circumferential direction are arranged in the circumferential direction, A rotating electric machine described in any one of technical ideas 1 to 3, wherein the multiple coil portion boundaries include a first boundary (216a) where the interposition control portion is provided and a second boundary (216b) where the interposition control portion is not provided.

[0173] (Technical Thought 5) a coil module (250) having a plurality of the coil portions and arranged in the circumferential direction; A rotating electric machine as described in Technical Idea 4, wherein the interposition control portion is configured so that all of the coil portion boundaries present in the coil module become the first boundary, and the coil portion boundary that is the boundary between two circumferentially adjacent coil modules becomes the second boundary.

[0174] (Technical Thought 6) A rotating electric motor according to Technical Idea 5, wherein the number of coil sections possessed by the coil module is a number such that the value obtained by converting the mechanical angle (θmc) of the coil module into an electrical angle (θe) is a natural number multiple of 360°.

[0175] (Technical Thought 7) The coil portion is provided for each of the three phases, The rotating electric machine according to Technical Idea 5 or 6, wherein the number of the coil portions included in the coil module is a natural number multiple of three.

[0176] (Technical Thought 8) A rotating electric machine described in any one of technical ideas 1 to 7, wherein the coil support portion is arranged to hook onto the coil portion from the axial direction, and restricts the coil portion from moving relative to the electric housing in the axial direction.

[0177] (Technical Thought 9) The coil support portion is A rotating electric machine described in any one of technical ideas 1 to 8, having a support plate portion (281a, 281b) that extends in a plate-like shape in a direction perpendicular to the axial direction and supports the coil portion while being overlapped with the coil portion from the axial direction.

[0178] (Technical Thought 10) The rotating electric machine according to any one of Technical Ideas 1 to 9, which is provided in an aircraft (10) and drives the aircraft to fly.

[0179] (Technical Thought 11) A coil module (250) forming a coil (64) of a rotating electric machine (60), a plurality of coil portions (211) that form at least a part of the coil and are arranged in a predetermined direction (CD); an interposition restricting portion (255) provided between two adjacent coil portions in the predetermined direction and restricting one of the coil portions from moving relative to the other of the coil portions in the predetermined direction; Equipped with A coil module, wherein the plurality of coil portions are fixed to each other.

[0180] (Technical Thought 12) a stator (200) having a coil portion (211) that forms at least a part of the coil (64); a rotor (300) that rotates about 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 manufacturing method for manufacturing a rotating electric machine (60) comprising: a module process (P102) for assembling a coil module (250) having a plurality of coil sections (211) arranged in a circumferential direction (CD) of the rotation axis, the module process (P102) including providing an interposition restricting section (255) between two adjacent coil sections in the circumferential direction (CD) of the rotation axis, the interposition restricting section restricting relative movement of one of the coil sections in the circumferential direction (CD) with respect to the other coil section; an installation step (P104) of installing the coil module inside the electric housing; a fixing step (P103, P105) of fixing the coil module to the electric housing using a coil support (280) that supports the coil section in a state of being stretched across the coil section and the electric housing; A method for manufacturing a rotating electric machine comprising: [Explanation of symbols]

[0181] 10...eVTOL, 60...motor device, 64...coil, 70...motor housing, 71...motor outer peripheral wall as electric machine outer peripheral wall, 73...wall inner protrusion as wall protrusion portion, 74...protruding fixing portion as protruding fixing portion, 75...protruding connecting portion as bridge portion, 200...stator, 211...coil portion, 212...coil lead wire, 215...coil portion group, 216...core piece boundary, 216a...first boundary, 216b...second boundary, 231...core, 255...adhesive film, 280...core piece support portion, 281a...first support plate, 281b...second support plate, 300...rotor, Cm...motor axis, AD...axial direction, CD...circumferential direction, θmc...mechanical angle, θe...electrical angle.

Claims

1. A rotating electric machine (60) driven by energizing a coil (64), a stator (200) having a coil portion (211) that forms at least a part of the coil; a rotor (300) that rotates about a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric housing (70) that accommodates the stator and the rotor; a coil support portion (280) fixed to the electric housing and supporting the coil portion in a state of being stretched across the coil portion and the electric housing; an intervening restricting portion (255) provided between two adjacent coil portions in the circumferential direction (CD) of the rotation axis, restricting one of the coil portions from moving relative to the other in the circumferential direction; A rotating electric machine comprising:

2. The rotating electric machine according to claim 1, wherein the interposition restricting portion has a restricting adhesive portion (255) that bonds two of the coil portions adjacent to each other in the circumferential direction.

3. The regulating adhesive portion is 3. The rotating electric machine according to claim 2, further comprising a film member (255) extending in a film shape in a direction perpendicular to the circumferential direction and bonded to each of two of the coil portions adjacent to each other in the circumferential direction.

4. A plurality of coil portion boundaries (216) that are boundaries between two of the coil portions adjacent in the circumferential direction are arranged in the circumferential direction, A rotating electric machine as described in any one of claims 1 to 3, wherein the multiple coil portion boundaries include a first boundary (216a) where the interposition control portion is provided and a second boundary (216b) where the interposition control portion is not provided.

5. a coil module (250) having a plurality of the coil portions and arranged in the circumferential direction; 5. The rotating electric machine according to claim 4, wherein the interposition control portion is arranged so that all of the coil portion boundaries present in the coil module become the first boundary, and the coil portion boundary that is the boundary between two circumferentially adjacent coil modules becomes the second boundary.

6. 6. The rotating electric machine according to claim 5, wherein the number of coil sections included in the coil module is a number such that the value obtained by converting the mechanical angle (θmc) of the coil module into an electrical angle (θe) is a natural number multiple of 360°.

7. The coil portion is provided for each of the three phases, The rotating electric machine according to claim 5 , wherein the number of the coil portions included in the coil module is a natural number multiple of three.

8. A rotating electric machine according to any one of claims 1 to 3, wherein the coil support portion is arranged to hook onto the coil portion from the axial direction, and restricts the coil portion from moving relative to the electric housing in the axial direction.

9. The coil support portion is A rotating electric machine as described in any one of claims 1 to 3, which has a support plate portion (281a, 281b) extending in a plate-like shape in a direction perpendicular to the axial direction and supporting the coil portion in a state where it is overlapped with the coil portion from the axial direction.

10. The rotating electric machine according to any one of claims 1 to 3, which is provided in an aircraft (10) and drives the aircraft to fly.

11. A coil module (250) forming a coil (64) of a rotating electric machine (60), A coil portion (211) that forms at least a part of the coil and is arranged in a predetermined direction (CD); an intervening restricting portion (255) provided between two adjacent coil portions in the predetermined direction and restricting one of the coil portions from moving relatively in the predetermined direction with respect to the other coil portion; Equipped with A coil module, wherein the plurality of coil portions are fixed to each other.

12. a stator (200) having a coil portion (211) that forms at least a part of the coil (64); a rotor (300) that rotates about a rotation axis (Cm) and is arranged on the stator in an axial direction (AD) along which the rotation axis extends; an electric housing (70) that accommodates the stator and the rotor; A manufacturing method for manufacturing a rotating electric machine (60) comprising: a module process (P102) for assembling a coil module (250) having a plurality of coil sections (211) arranged in a circumferential direction (CD) of the rotation axis, in which an intervening restricting section (255) is provided between two coil sections adjacent to each other in the circumferential direction (CD) of the rotation axis, restricting one of the coil sections from moving relative to the other coil section in the circumferential direction; an installation step (P104) of installing the coil module inside the electric housing; a fixing step (P103, P105) of fixing the coil module to the electric housing using a coil support part (280) that supports the coil part in a state of being stretched across the coil part and the electric housing; A method for manufacturing a rotating electric machine comprising:

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