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

Abstract

A stator (200) has multiple core pieces (210). Each core piece (210) has a coil section (211), a core (230), a bobbin (240), and a piece cover (250). The coil section (211) is wound around the core (230) with the bobbin (240) interposed therebetween. A plurality of winding parts (212) are layered in the coil axis direction (α) in the coil section (211). The piece cover (250) has a cover outer surface section (251), a core interposition part (252), and a winding interposition part (253). The cover outer surface section (251) covers the coil section (211), the core (230), and the bobbin (240). The core interposition part (252) is provided so as to fill a gap formed between the core (230) and the coil section (211). The winding interposition part (253) is provided so as to fill a gap formed between two winding parts (212) adjacent in the coil axis direction (α).

Description

Rotating Electric Machine, Coil Module, and Method of Manufacturing Rotating Electric Machine Cross - Reference to Related Applications 【0001】 This application is based on Japanese Patent Application No. 2024 - 217031 filed in Japan on December 11, 2024, the entire contents of which are incorporated herein by reference. 【0002】 The disclosure in this specification relates to a rotating electric machine, a coil module, and methods of manufacturing a rotating electric machine. 【0003】 Patent Document 1 describes a motor. In this motor, a rotor and a stator are housed in a housing. The stator has a plurality of coil portions arranged along the outer peripheral wall of the housing. A heat - radiating portion made of resin is provided between the coil portion and the outer peripheral wall. 【0004】 Japanese Unexamined Patent Application Publication No. 2024 - 117246 【0005】 However, in a configuration where the coil portion is wound around the core in the stator, there is a concern that if the heat of the core is difficult to transfer to the coil portion, the heat - radiating effect of the motor may decrease. 【0006】 One object of the present disclosure is to provide a rotating electric machine, a coil module, and a method of manufacturing a rotating electric machine that can enhance the heat - radiating effect. 【0007】 The plurality of aspects disclosed in this specification employ different technical means to achieve their respective objects. Also, the claims and the reference numerals in parentheses described in this section are an example showing the correspondence relationship between the specific means described in the embodiments described later as one aspect, and do not limit the technical scope. 【0008】 To achieve the above object, the disclosed aspect is a rotating electric machine driven by power supply, comprising: a stator; a rotor that rotates with respect to the stator; the stator having: a core; a coil portion provided on the outer peripheral side of the core; and a core heat - conducting portion having heat conductivity and provided so as to fill a gap formed between the core and the coil portion. 【0009】According to the above embodiment, a core heat transfer section is provided to fill the gap formed between the core and the coil section. In this configuration, the transfer of heat from the core to the coil section is facilitated by the core heat transfer section. Therefore, heat from the core is easily released to the outside of the stator via the core heat transfer section and the coil section. Consequently, the heat dissipation effect of the rotating electric machine can be enhanced. 【0010】 The disclosed embodiment is a coil module forming a coil of a rotating electric machine, comprising: a core; a coil portion provided on the outer circumference of the core; and a core heat transfer portion provided to fill the gap formed between the core and the coil portion, and to release heat from the core to the coil portion. 【0011】 According to the above embodiment, similar to the rotating electric machine, a core heat transfer section is provided to fill the gap formed between the core and the coil section. Therefore, the heat dissipation effect of the coil module can be enhanced. 【0012】 The disclosed embodiment is a method for manufacturing a rotating electric machine comprising a stator and a rotor that rotates relative to the stator, comprising the steps of: providing a coil portion on the outer circumference of a core; injecting a core molten resin, which is a molten resin, into the gap formed between the core and the coil portion; and solidifying the core molten resin to form a core heat transfer portion having thermal conductivity. 【0013】 According to the above embodiment, a core molten resin is injected into the gap formed between the core and the coil portion, and the core molten resin is solidified. Therefore, a configuration in which a core heat transfer portion is provided to fill the gap formed between the core and the coil portion can be realized using the core molten resin. Accordingly, similar to the rotating electric machine described above, the heat dissipation effect of the rotating electric machine can be enhanced. 【0014】A diagram showing the configuration of the eVTOL in the first embodiment. A diagram showing the electrical configuration of the propulsion system. A schematic perspective view of the EPU. A schematic longitudinal section view of the motor device. A perspective view of the stator and motor housing. A plan view of the core piece and motor housing. A longitudinal section view of the motor device, cut around the core piece in a direction perpendicular to the motor circumferential direction. A longitudinal section view of the motor device, cut around the core piece in a direction perpendicular to the motor radial direction. A plan view of the core piece. A flowchart showing the procedure of the core piece process. A perspective view of the teeth. A perspective view of the teeth with bobbin. An exploded perspective view of the teeth with bobbin and flange. A perspective view of the core with bobbin. A perspective view of the core with coil section. A perspective view of the core piece. A flowchart showing the procedure of the stator process. A plan view of the core piece in the second embodiment. A diagram showing the schematic configuration of the motor device in the third embodiment. A longitudinal section view of the motor device, cut around the core piece in a direction perpendicular to the motor circumferential direction. A diagram showing the schematic configuration of the motor device in the fourth embodiment. 【0015】 Several embodiments for implementing this disclosure are described below with reference to the drawings. In each embodiment, parts corresponding to matters described in a preceding embodiment are denoted by the same reference numerals, and redundant explanations may be omitted. If only a part of the configuration is described in each embodiment, other parts of the configuration can be applied to other embodiments described in advance. Not only are combinations of parts that are explicitly shown to be combinable in each embodiment possible, but embodiments can also be partially combined even if not explicitly shown, as long as there are no particular problems with the combination. 【0016】<First Embodiment> The propulsion system 30 shown in Figure 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 flying vehicle that flies in the atmosphere and is sometimes referred to as an electric flying vehicle. The eVTOL 10 is also an electric aircraft and is sometimes referred to as an electric aircraft. The eVTOL 10 is a manned flying vehicle that carries a crew. The crew of the eVTOL 10 includes a pilot as the operator or driver. 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. 【0017】 The eVTOL 10 has an airframe 11 and a propeller 20. The airframe 11 has an airframe body 12 and wings 13. The airframe body 12 is the fuselage of the airframe 11 and has a shape that extends, for example, forward and backward. The wings 13 extend from the airframe body 12 and are provided in multiples on the airframe body 12. The wings 13 are fixed wings. The multiple wings 13 include main wings, tail wings, etc. 【0018】 The eVTOL 10 has an aircraft cabin. The aircraft cabin is located inside the eVTOL 10. For example, the aircraft cabin is the internal space of the aircraft body 12 and is formed by the aircraft body 12. The aircraft cabin may include a crew compartment 14 or a cargo compartment. The crew compartment 14 may include a passenger cabin or a pilot's cabin. The crew compartment 14 is equipped with seats for the crew. The crew compartment 14 does not have to be occupied by crew members and may contain cargo. 【0019】Multiple propellers 20 are provided on the airframe 11. The eVTOL 10 is a multirotor 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 the airframe body 12 and the wings 13, respectively. The propellers 20 rotate around their propeller axis. The propeller axis is, for example, the center line of the propeller 20. The propellers 20 can generate thrust and lift in the eVTOL 10. The propellers 20 are also sometimes referred to as rotors or rotor blades. 【0020】 The propeller 20 has blades 21 and a boss 22. Multiple blades 21 are arranged in the circumferential direction of the propeller axis. The boss 22 connects the multiple blades 21. The blades 21 extend radially from the boss 22 along the propeller axis. The propeller 20 has a propeller shaft (not shown). The propeller shaft is the axis of rotation of the propeller 20 and extends from the boss 22 along the propeller axis. 【0021】 The eVTOL 10 is a tiltrotor aircraft. In the eVTOL 10, the tilt angle of the propeller 20 is adjustable. However, the eVTOL 10 does not have to be a tiltrotor aircraft. For example, the eVTOL 10 may have separate propellers 20 for lift and propellers 20 for cruising. 【0022】 The eVTOL 10 includes a battery 31, a distributor 32, a flight control device 40, and an EPU 50. The battery 31, distributor 32, flight control device 40, and EPU 50 are included in the propulsion system 30. The battery 31 is connected to multiple EPUs 50 so as to be energized. 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 EPUs 50. The battery 31 has a rechargeable secondary battery. The battery 31 also supplies power to the flight control device 40. In addition to the battery 31, a fuel cell or a generator may be used as a power supply unit. 【0023】The distributor 32 is electrically connected to the battery 31 and the multiple EPUs 50. The distributor 32 distributes power from the battery 31 to the multiple EPUs 50. The power that the distributor 32 distributes to the EPUs 50 is the drive power required to operate the EPUs 50. 【0024】 The flight control device 40 controls the propulsion system 30. The flight control device 40 performs flight control to fly 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. 【0025】 The EPU 50 is a device that drives the propeller 20 to rotate, and is equivalent to a drive unit. EPU is an abbreviation for Electric Propulsion Unit. The EPU 50 is sometimes referred to as an electric drive unit or electric drive system. An EPU 50 is provided individually for each of the multiple propellers 20. The EPU 50s are arranged along the propeller axis of the propeller 20. All of the multiple EPU 50s are fixed to the aircraft body 11. The EPU 50 rotatably supports the propeller 20. The EPU 50 is connected to the propeller 20. The propeller 20 is fixed to the aircraft body 11 via the EPU 50. When the tilt angle of the propeller 20 is changed, the angle of the EPU 50 is also changed. 【0026】 The eVTOL 10 has a propulsion system. The propulsion system is a device for propelling the eVTOL 10. The eVTOL 10 can perform lifts and other forms of flight through the propulsion system. The propulsion system has a propeller 20 and an EPU 50. In the propulsion system, the propeller 20 rotates in conjunction with the drive of the EPU 50. The propeller 20 corresponds to a rotating body. The eVTOL 10 flies by the rotation of the propeller 20. That is, the eVTOL 10 moves by the rotation of the propeller 20. The eVTOL 10 corresponds to a moving body. 【0027】As shown in Figures 1 and 2, the EPU 50 has a motor unit 60 and an inverter unit 80. The motor unit 60 has a motor 61. The motor unit 60 corresponds to a rotating electric machine. The inverter unit 80 has an inverter 81. The motor 61 is electrically connected to the battery 31 via the inverter 81. The motor 61 is driven according to the power supplied from the battery 31 via the inverter 81. 【0028】 Motor 61 is a multi-phase AC motor. Motor 61 is, for example, a three-phase AC motor and has U-phase, V-phase, and W-phase. Motor 61 is a power source for moving a moving object and functions as an electric motor. For example, a brushless motor is used as motor 61. Motor 61 functions as a generator during regeneration. Motor 61 has multiple-phase coils 64. The coils 64 are windings and form the armature. Motor 61 is driven by energizing the coils 64. Coils 64 are provided for each of the U-phase, V-phase, and W-phase. For example, motor 61 has a U-phase coil 64, a V-phase coil 64, and a W-phase coil 64. In motor 61, the multiple-phase coils 64 are connected to each other at a neutral point 65. Note that the U-phase is sometimes referred to as the first phase, the V-phase as the second phase, and the W-phase as the third phase. 【0029】 In Figure 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 DC to AC. The inverter 81 is a power conversion unit that converts power. The inverter 81 is a multi-phase power conversion unit and performs power conversion for each of the multiple phases. For example, the inverter 81 is a three-phase inverter and 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. 【0030】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 electrode on the high potential side, and the negative electrode is the electrode on the low potential side. The P line 141 and the N line 142 are power lines for supplying power. The P line 141 is the power line on the high potential side and is sometimes referred to as the high potential line. The N line 142 is the power line on the low potential side and is sometimes referred to as the low potential line. 【0031】 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 connected to the motor device 60 and the inverter device 80. 【0032】 The inverter device 80 has a smoothing capacitor 145. The smoothing capacitor 145 is a capacitor that smooths 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. 【0033】 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 multiple phases. For example, the inverter 81 has upper and lower arm circuits 85 for each of the U-phase, V-phase, and W-phase. The upper and lower arm circuits 85 have 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. 【0034】The output line 143 is connected to the upper and lower arm circuit 85 for each of the multiple phases. The output line 143 is connected between the upper arm 85a and the lower arm 85b. In each of the multiple phases, the output line 143 connects the upper and lower arm circuit 85 to the coil 64. The output line 143 is connected to the coil 64 on the opposite side from the neutral point 65. 【0035】 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 and is capable of converting power by switching. The switching element can be any semiconductor element such as a power element. The arm switch 86 is a conversion switch for converting power. 【0036】 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 drive of the inverter 81. The control circuit 160 controls the drive of the motor 61 via the inverter 81. The control circuit 160 is sometimes referred to as the motor control unit. In Figure 2, the control circuit 160 is shown as CD. 【0037】 As shown in Figure 3, the EPU 50 has a gear device 53. The gear device 53 mechanically connects the motor device 60 and the propeller 20. The gear device 53 transmits the drive of the motor device 60 to the propeller 20. The gear device 53 is installed between the motor device 60 and the propeller 20. 【0038】 In the EPU 50, the motor unit 60, inverter unit 80, and gear unit 53 are arranged in the axial direction AD along the motor axis Cm. The motor unit 60 is located between the propeller 20 and the inverter unit 80 in the axial direction AD. The motor axis Cm is the centerline of the motor 61 and is a hypothetical line extending in a straight line. The motor axis Cm corresponds to the axis of rotation. The axial direction AD is the direction in which the motor axis Cm extends. 【0039】 Regarding the motor axis Cm, the axial direction AD, circumferential direction CD, and radial direction RD are mutually orthogonal. The circumferential direction CD is the rotation direction of the motor 61. The radial direction RD is sometimes referred to as the radial outer side or outer circumference, and the inner side as the radial inner side or inner circumference. The axial direction AD is sometimes referred to as the axial direction. The axial direction AD is sometimes referred to as the motor axial direction AD, the radial direction RD is sometimes referred to as the motor radial direction RD, and the circumferential direction CD is sometimes referred to as the motor circumferential direction CD. 【0040】 The EPU 50 has a motor housing 70 and an inverter housing 90. The motor housing 70 is included in the motor unit 60. The motor housing 70 houses the motor 61. The inverter housing 90 is included in the inverter unit 80. The inverter housing 90 houses the inverter 81. The motor housing 70 and the inverter housing 90 are connected to each other. 【0041】 As shown in Figure 4, the motor housing 70 has a motor outer circumferential wall 71, a rear frame 370, and a drive frame 390. The motor outer circumferential wall 71 and the frames 370 and 390 are made of a metal or the like and have thermal conductivity. The motor outer circumferential wall 71 is formed in a cylindrical shape and extends in the axial direction A. The frames 370 and 390 are formed in a plate shape and extend in a direction perpendicular to the axial direction A. The rear frame 370 and the drive frame 390 are arranged in the axial direction A via the motor outer circumferential wall 71. The frames 370 and 390 are fixed to the motor outer circumferential wall 71 by fasteners such as bolts. Figure 4 also shows a longitudinal cross-section of the motor device 60 cut along the motor axis Cm. 【0042】 The motor housing 70 has an outer housing surface 70a and an inner housing surface 70b. The outer housing surface 70a is the outer surface of the motor housing 70. The inner housing surface 70b is the inner surface of the motor housing 70. The outer housing surface 70a and the inner housing surface 70b are formed by the motor outer peripheral wall 71, the rear frame 370, and the drive frame 390. 【0043】The rear frame 370 covers the inner space of the motor outer peripheral wall 71 from the side of the inverter device 80. The rear frame 370 is provided on the side opposite to the propeller 20 via the motor outer peripheral wall 71. The drive frame 390 covers the inner space of the motor outer peripheral wall 71 from the side opposite to the inverter device 80. The drive frame 390 is provided on the propeller 20 side of the motor outer peripheral wall 71. 【0044】 The motor housing 70 has motor fins 72. The motor fins 72 are provided on the housing outer surface 70a. For example, the motor fins 72 are provided on the outer peripheral surface of the motor outer peripheral wall 71. The motor fins 72 project outward from the motor outer peripheral wall 71. The motor fins 72 extend in a direction orthogonal to the circumferential direction CD. A plurality of motor fins 72 are arranged in the circumferential direction CD. The motor fins 72 are heat radiating fins that release the heat of the motor device 60 to the outside. 【0045】 The motor 61 has a stator 200, a rotor 300, and a shaft 340. The stator 200 is a stator. The stator 200 has coils 64. The rotor 300 is a rotor. The rotor 300 rotates relative to the stator 200. The rotor 300 rotates about the motor axis Cm. The rotation direction of the rotor 300 is the circumferential direction CD. 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. 【0046】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, the stator 200 and the rotor 300 are arranged in the axial direction AD via the gap 305. 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 300, namely the first rotor 300A and the second rotor 300B. The first rotor 300A and the second rotor 300B are arranged in the axial direction AD via the stator 200. The motor 61 may be referred to as a double-axial motor. In an axial-gap type motor, the axial direction AD corresponds to the first direction, and the radial direction RD corresponds to the second direction. 【0047】 The shaft 340 supports the rotor 300. The shaft 340 rotates about the motor axis Cm together with the rotor 300. The center line of the shaft 340 coincides with the motor axis Cm. The shaft 340 connects the rotor 300 and the propeller 20. 【0048】 The shaft 340 is rotatably supported by the rear bearing 350 and the drive bearing 360. The bearings 350 and 360 are included in the motor device 60. The bearings 350 and 360 extend annularly in the circumferential direction CD. The rear bearing 350 and the drive bearing 360 are arranged in the axial direction AD via the rotor 300. The bearings 350 and 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. 【0049】 The motor housing 70 houses the stator 200 and the rotor 300. In the motor housing 70, the motor outer peripheral wall 71 covers the stator 200 and the rotor 300 from the outer peripheral side. The motor housing 70 corresponds to the electric machine housing. The motor outer peripheral wall 71 corresponds to the electric machine outer peripheral wall. 【0050】The rotor 300 has magnet sections 310 and magnet holders 320. Multiple magnet sections 310 are arranged in the circumferential direction CD on each rotor 300. The magnet sections 310 are composed of permanent magnets and form a magnetic field. 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 circumferential ends of the rotor 300. 【0051】 The stator 200 has a coil section 211 and a core 230. The coil section 211 is formed including a coil wire 213. The coil wire 213 forms the coil section 211 when wound around the core 230. The coil wire 213 is an electric wire such as a flat rectangular wire. The coil section 211 and the coil wire 213 are electrically conductive. The coil section 211 is attached to the core 230. The coil section 211 is formed in a cylindrical shape as a whole and extends in the axial direction AD. Multiple coil sections 211 and core 230 are arranged in the circumferential direction CD along the inner circumferential surface of the motor outer peripheral wall 71. In the stator 200, a coil 64 is formed by multiple coil sections 211. 【0052】 The stator 200 has a core piece 210. The core piece 210 is formed including a coil portion 211 and a core 230. The core piece 210 is a component in which the coil portion 211 and the core 230 are integrated. The core piece 210 corresponds to a coil module. The core piece 210 is sometimes referred to as a coil piece. In the stator 200, multiple core pieces 210 are arranged in the circumferential direction CD, so that multiple coil portions 211 are arranged in the circumferential direction CD. 【0053】The coil portion 211 is wound around the core 230 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 230, and the bobbin 240 are integrated. The bobbin 240 is made of a resin material or the like and has electrical insulation and thermal conductivity. The bobbin 240 electrically insulates the coil portion 211 from the core 230. The bobbin 240 corresponds to the insulating part. The bobbin 240 is formed in a cylindrical shape as a whole and extends in the axial direction A and D. For example, the bobbin 240 is provided so as to cover the outer circumferential surface of the teeth 231. The coil portion 211 is wound around the teeth 231 via the bobbin 240 between a pair of flanges 235. 【0054】 The coil section 211 is provided on the outer circumference of the core 230. In the coil section 211, the coil wire 213 is wound in the coil circumferential direction β. The coil wire 213 is wound so as to extend in the coil circumferential direction β along the outer surface of the core 230. The winding direction of the coil section 211 is the coil circumferential direction β. The coil wire 213 is wound around the coil axis Cw. The coil axis Cw is the center line of the coil section 211. The coil axis Cw extends in the motor axial direction AD. With respect to the coil axis Cw, the axial direction α, the circumferential direction β, and the radial direction γ are mutually orthogonal. The coil axial direction α is sometimes referred to as the coil axial direction α, the circumferential direction β as the coil circumferential direction β, and the radial direction γ as the coil radial direction γ. The coil axial direction α coincides with the motor axial direction AD. Regarding the radial direction γ of the coil, the outer side is sometimes referred to as the radially outer side or outer circumference, and the inner side is sometimes referred to as the radially inner side or inner circumference. 【0055】The core 230 is an iron core and extends in the coil axis direction α. ​​The core 230 is formed of a metallic material or the like. For example, the core 230 is formed including a soft magnetic material. As shown in Figures 7 to 9, the core 230 has teeth 231 and flanges 235. The teeth 231 and flanges 235 are arranged in the coil axis direction α. ​​The teeth 231 are formed in a columnar shape and extend in the coil axis direction α. ​​The flanges 235 are formed in a plate shape and extend in a direction perpendicular to the coil axis direction α. ​​A pair of flanges 235 are arranged in the coil axis direction α via the teeth 231. The teeth 231 extend in the axial direction AD so as to span across the pair of flanges 235. The flanges 235 extend so as to project from the teeth 231 in the coil radial direction γ. 【0056】 The flange 235 has a flange projection 235a and a flange base 235b. The flange base 235b extends from the teeth 231 so as to project in the coil radial direction γ. The flange projection 235a projects from the flange base 235b toward the opposite side from the teeth 231. The flange base 235b extends from both the teeth 231 and the flange projection 235a so as to project in the coil radial direction γ. 【0057】 As shown in Figures 7 and 8, the coil portion 211 has a winding portion 212. The winding portion 212 is formed from a coil wire 213. Multiple winding portions 212 are stacked in the direction of the coil axis α. The multiple winding portions 212 are arranged in the direction of the coil axis α to form the coil portion 211. In the coil portion 211, one end of two adjacent winding portions 212 in the direction of the coil axis α is connected to the other end. The winding portion 212 extends around the outer circumference of the core 230 in the coil circumferential direction β. In a plan view, the winding portion 212 extends in an annular shape in the coil circumferential direction β. 【0058】As shown in Figure 9, the coil portion 211 has a coil-facing portion 211a, a housing-facing portion 211b, and a housing-opposite portion 211c. The coil-facing portion 211a is the portion of the coil portion 211 that faces the adjacent coil portion 211. The coil-facing portions 211a are arranged in pairs in the coil portion 211 via the core 230 in the coil circumferential direction β. The coil-facing portion 211a is the portion of the coil portion 211 that extends in the coil radial direction γ. 【0059】 The housing opposing portion 211b is the portion of the coil portion 211 that faces the motor housing 70. The housing opposing portion 211b faces the inner surface 70b of the housing. For example, the housing opposing portion 211b faces the inner surface of the motor outer wall 71. The housing opposite portion 211c is the portion of the coil portion 211 that is opposite to the motor outer wall 71 via the coil opposing portion 211a and the housing opposing portion 211b. The housing opposing portion 211b and the housing opposite portion 211c are aligned in the coil radial direction γ. The housing opposing portion 211b and the housing opposite portion 211c are portions of the coil portion 211 that extend in the coil circumferential direction β. For example, the housing opposing portion 211b extends in the motor circumferential direction CD along the motor outer wall 71. 【0060】 In the coil section 211, the coil-facing section 211a, the housing-facing section 211b, and the housing-opposite section 211c are arranged in the coil circumferential direction β. Each of the coil-facing section 211a, the housing-facing section 211b, and the housing-opposite section 211c contains a portion of each of the multiple winding sections 212. 【0061】 As shown in Figures 4 and 5, the motor device 60 has a core piece support section 280. The core piece support section 280 supports the core piece 210. The core piece support section 280 is fixed to the outer peripheral wall 71 of the motor. The core piece support section 280 has a first support plate 281A, a second support plate 281B, and a support pole 291. 【0062】As shown in Figures 4 and 5, 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 aligned in the axial direction AD via a core piece 210. The core piece 210 is fixed to the motor housing 70 while sandwiched between the first support plate 281A and the second support plate 281B. 【0063】 The support pole 291 shown in Figure 4 extends columnarly in the axial direction AD. The support pole 291 is provided radially inward of the core piece 210. The support pole 291 connects the first support plate 281A and the second support plate 281B. The support plates 281A and 281B are fixed to the wall projection 73 of the motor outer peripheral wall 71. As shown in Figures 4 and 6, the wall projection 73 is a projection provided on the inner circumferential surface of the motor outer peripheral wall 71. The wall projection 73 connects the first support plate 281A and the second support plate 281B. 【0064】 As shown in Figure 5, the support plates 281A and 281B have core holes 285a. The core holes 285a penetrate the support plates 281A and 281B in the axial direction AD. Multiple core holes 285a are arranged in the circumferential direction CD. The core piece 210 is fitted into the core holes 285a. A portion of the core 230 is exposed to the rotor 300 side through the core holes 285a. In the core 230, the flange projection 235a is fitted into the core holes 285a. The support plates 281A and 281B are stacked on the flange base 235b. 【0065】 As shown in Figure 8, the core piece support portion 280 has a plate joint portion 292. The plate joint portion 292 joins the core piece 210 to the support plates 281A and 281B. For example, the plate joint portion 292 joins the guard base 235b to the support plates 281A and 281B. For example, the plate joint portion 292 is provided between the guard base 235b and the support plate 281A, and adheres the guard base 235b to the support plate 281A. The plate joint portion 292 is formed by the hardening of the adhesive. 【0066】 As shown in Figures 7 and 8, the core piece 210 has a piece cover 250. The piece cover 250 is made of a resin material or the like and has electrical insulation and thermal conductivity. For example, the piece cover 250 is made of a room-temperature curing resin material. The core piece 210 has a resin layer made of a silicon-based or silicon-based resin material and a filler made of a metal material mixed into the resin layer. The piece cover 250 is provided to cover the coil section 211, the core 230, and the bobbin 240. The piece cover 250 protects the coil section 211, the core 230, and the bobbin 240. In Figure 9 and the like, the illustration of the piece cover 250 is omitted. 【0067】 The piece cover 250 has an outer cover portion 251, a core intervening portion 252, and a winding intervening portion 253. The outer cover portion 251 forms the outer surface of the piece cover 250. The outer cover portion 251 covers the coil portion 211, the core 230, and the bobbin 240. For example, the outer cover portion 251 covers the outer surface of the coil portion 211 and the portions of the core 230 and bobbin 240 that are exposed from the coil portion 211. The outer cover portion 251 corresponds to the coil covering. 【0068】 The core intervening portion 252 is provided between the core 230 and the coil portion 211. The core intervening portion 252 is provided to fill the gap formed between the core 230 and the coil portion 211. The core intervening portion 252 corresponds to the core heat transfer portion. For example, the core intervening portion 252 is provided to fill the gap formed between the bobbin 240 and the coil portion 211. The core intervening portion 252 can transfer heat from the core 230 to the coil portion 211. For example, the core intervening portion 252 can transfer heat that has been transmitted from the core 230 to the core intervening portion 252 via the bobbin 240 to the coil portion 211 and the winding intervening portion 253. The core intervening portion 252 extends in the coil axis direction α so as to span across a pair of flanges 235. 【0069】In the core piece 210, the teeth 231 and bobbin 240 are formed in a rectangular shape in plan view. In the core piece 210, the coil portion 211 is wound around the flat outer surface of the bobbin 240, which can create a gap between the outer surface of the bobbin 240 and the coil portion 211. That is, a gap can occur in the region between the core 230 and the coil portion 211. For example, a gap can occur between the housing opposing portion 211b or the housing opposite portion 211c and the bobbin 240. The core intervening portion 252 is filled into this gap. The core intervening portion 252 is sometimes referred to as a gap filler. 【0070】 As shown in Figures 7 and 9, the core intervening portion 252 includes a housing-side intervening portion 252a and an opposite intervening portion 252b. The housing-side intervening portion 252a is provided to fill the gap formed between the housing-facing portion 211b and the core 230. The housing-facing portion 211b is provided on the motor outer peripheral wall 71 side of the core 230 in the motor radial direction RD. The opposite intervening portion 252b is provided to fill the gap formed between the housing-opposite portion 211c and the core 230. The opposite intervening portion 252b is provided on the side opposite to the motor outer peripheral wall 71 via the core 230 in the motor radial direction RD. 【0071】 The housing-side intervening portion 252a and the opposite intervening portion 252b are provided between the core 230 and the coil portion 211 in a direction perpendicular to the rotational direction of the rotor 300. That is, the housing-side intervening portion 252a and the opposite intervening portion 252b are provided between the core 230 and the coil portion 211 in the motor radial direction RD. In an axial gap type motor, the direction perpendicular to the rotational direction of the rotor 300 corresponds to the motor radial direction RD. 【0072】 As shown in Figures 7 and 8, the winding intervening portion 253 is provided between two adjacent winding portions 212 in the coil axis direction α. ​​The winding intervening portion 253 is provided to fill the gap formed between the two winding portions 212. The winding intervening portion 253 corresponds to the winding heat transfer portion. The two adjacent winding portions 212 in the coil axis direction α are sometimes simply referred to as the two winding portions 212. 【0073】 The winding intervening portion 253 can transfer heat from the core 230 to the coil portion 211, and transfer heat from the coil portion 211 to the motor housing 70. For example, the winding intervening portion 253 can transfer heat transferred from the core 230, the coil portion 211, and the core intervening portion 252 to the outer circumferential wall 71 of the motor via the housing heat dissipation portion 295, which will be described later. 【0074】 The winding filler portion 253 has a shape similar to that of being wound around the core 230, just like the coil portion 211. The winding filler portion 253 is positioned in the gap formed between the two winding portions 212. Therefore, the winding filler portion 253 is not necessarily provided in the entire area between the two winding portions 212. The winding filler portion 253 is positioned to fill the gap between the two winding portions 212. The winding filler portion 253 is sometimes referred to as a gap filler. 【0075】 The piece cover 250 is a single resin member formed such that the cover outer surface 251, the core intervening portion 252, and the winding intervening portion 253 are integrated. The core intervening portion 252 extends in the coil axis direction α from the cover outer surface 251 so as to fit between the core 230 and the bobbin 240. The winding intervening portion 253 extends outward in the coil radial direction γ so as to fit between the two winding portions 212 from the core intervening portion 252. The winding intervening portion 253 also extends inward in the coil radial direction γ so as to fit between the two winding portions 212 from the cover outer surface 251. 【0076】 As shown in Figures 7 and 9, the stator 200 has a housing heat dissipation section 295. The housing heat dissipation section 295 is provided between the core piece 210 and the motor outer peripheral wall 71. For example, the housing heat dissipation section 295 is provided between the piece cover 250 and the motor outer peripheral wall 71. The housing heat dissipation section 295 extends annularly in the circumferential direction CD along the inner circumferential surface of the motor outer peripheral wall 71. The housing heat dissipation section 295 is provided on the outer peripheral side of the core piece 210 in the coil radial direction γ. The housing heat dissipation section 295 corresponds to the housing heat transfer section. The housing heat dissipation section 295 is capable of transferring heat from the coil section 211 to the motor outer peripheral wall 71. 【0077】 The housing heat dissipation section 295 is formed from a resin material or the like and has electrical insulation and thermal conductivity. For example, the housing heat dissipation section 295 is formed from a room-temperature curing resin material or the like. The housing heat dissipation section 295 has a resin layer formed from a silicon-based or silicon-based resin material and a filler formed from a metal material and mixed into the resin layer. 【0078】 The housing heat dissipation section 295 is in contact with the outer surface of the piece cover 250. For example, the housing heat dissipation section 295 adheres the piece cover 250 to the motor outer peripheral wall 71. The housing heat dissipation section 295 and the piece cover 250 are independent components of each other. For example, the core intervening section 252 and the winding intervening section 253 are independent components of the housing heat dissipation section 295. 【0079】 The thermal conductivity of the piece cover 250 and the housing heat dissipation section 295 are different. The thermal conductivity of the core intervening section 252 and the thermal conductivity of the housing heat dissipation section 295 are different from each other. For example, the thermal conductivity of the core intervening section 252 is lower than that of the housing heat dissipation section 295. Also, the thermal conductivity of the winding intervening section 253 and the thermal conductivity of the housing heat dissipation section 295 are different from each other. For example, the thermal conductivity of the winding intervening section 253 is lower than that of the housing heat dissipation section 295. Furthermore, the thermal conductivity of the cover outer surface 251 and the thermal conductivity of the housing heat dissipation section 295 are different from each other. For example, the thermal conductivity of the cover outer surface 251 is lower than that of the housing heat dissipation section 295. 【0080】 The thermal conductivity of the piece cover 250 is higher than that of air. For example, the thermal conductivity of the outer surface portion 251 of the cover, the core intervening portion 252, and the wound intervening portion 253 is higher than that of air. In the piece cover 250 and the housing heat dissipation portion 295, the type of resin material, the type and amount of filler, and the size are set so that the thermal conductivity of the piece cover 250 is lower than that of the housing heat dissipation portion 295. 【0081】The piece cover 250 is thinner overall than the housing heat dissipation section 295. For example, the thickness of the core intervening section 252 is thinner than the thickness of the housing heat dissipation section 295. That is, the gap between the core 230 and the coil section 211 is smaller than the gap between the core piece 210 and the motor outer peripheral wall 71. Also, the winding intervening section 253 is thinner than the housing heat dissipation section 295. That is, the gap between the two winding sections 212 is smaller than the gap between the core piece 210 and the motor outer peripheral wall 71. 【0082】 Next, the manufacturing method of the motor device 60 will be described. The manufacturing method of the motor device 60 corresponds to the manufacturing method of a rotating electric machine. The manufacturing method of the motor device 60 includes the manufacturing process for the motor device 60. The manufacturing process for the motor device 60 includes the core piece process and the stator process. The core piece process is the process for manufacturing the core piece 210. The core piece process is included in the manufacturing method of the core piece 210. The manufacturing method of the core piece 210 corresponds to the manufacturing method of a coil module. The stator process is the process for manufacturing the stator 200. 【0083】 First, the core piece process will be explained with reference to the flowchart in Figure 10. In process P101, the worker prepares for the manufacture of the core piece 210. For example, the worker prepares magnetic materials for manufacturing the core 230 and wire materials for manufacturing the coil portion 211. 【0084】 In steps P102 to P107, the worker performs the work to manufacture the core 230. In step P102, the worker forms a flange member 235C (see Figure 13) for forming the flange 235. For example, the worker forms the flange member 235C using a magnetic member. In step P103, the worker forms a tooth member 231C (see Figure 11) for forming the teeth 231. 【0085】 In step P104, the worker forms the bobbin 240 (see Figure 12). The worker attaches the bobbin 240 to the tooth member 231C using an insert mold or the like. The bobbin 240 is attached to the outer circumferential surface of the tooth member 231C. 【0086】In steps P105 to P107, the worker fixes the tooth member 231C and the flange member 235C. The worker fixes the flange member 235C to both the tooth member 231C and the bobbin 240. 【0087】 In process P105, the worker polishes the tooth member 231C and the flange member 235C. The worker polishes the joining surface of the tooth member 231C that joins to the flange member 235C. The worker polishes the joining surface of the flange member 235C that joins to the tooth member 231C. After polishing the tooth member 231C and the flange member 235C, the worker may inspect the bobbin 240. For example, the worker may confirm that the electrical insulation of the bobbin 240 is appropriate. The worker may also confirm that the shape and size of the bobbin 240 are appropriate. 【0088】 In step P106, the worker applies the core adhesive 261 to the tooth member 231C, the bobbin 240, and the flange member 235C (see Figure 13). For example, the worker applies the core adhesive 261 to the joint surface of the tooth member 231C and the joint surface of the flange member 235C. The core adhesive 261 is an adhesive in a molten state. The core adhesive 261 is formed by including a thermosetting molten resin or a room-temperature curing molten resin. 【0089】 In step P107, the worker adheres the flange member 235C to the tooth member 231C and the bobbin 240 using core adhesive 261. For example, the worker overlaps the joining surface of the tooth member 231C with the joining surface of the flange member 235C and adheres these joining surfaces. The worker then manufactures the core 230 with the bobbin 240 by fixing the flange member 235C to the tooth member 231C and the bobbin 240 (see Figure 14). 【0090】 After manufacturing the core 230, the worker may inspect the core 230. For example, the worker may confirm that the magnetic flux passes through the core 230 properly. The worker may also inspect the loss conditions in the core 230. For example, the worker may measure the eddy current loss occurring in the core 230 and confirm that the eddy current loss is within the acceptable range. 【0091】In step P108, the worker forms a coil section 211 with a core 230 by winding the coil wire 213 onto the bobbin 240 and the core 230 (see Figure 15). Step P108 corresponds to the coil process. After forming the coil section 211, the worker may inspect the core 230, the bobbin 240, and the coil section 211. For example, the worker confirms that proper electrical insulation is ensured between the core 230 and the coil 64. 【0092】 In steps P109 and P110, the worker forms a piece cover 250 so as to cover the coil portion 211 with the core 230. The worker manufactures the core piece 210 by attaching the piece cover 250 to the coil portion 211 with the core 230 using an insert mold or the like (see Figure 16). After forming the piece cover 250, the worker may inspect the piece cover 250. For example, the worker may confirm that the electrical insulation of the piece cover 250 is properly ensured. 【0093】 In step P109, the operator sets the coil section 211 with the core 230 into the mold and injects the core molten resin MC into the mold to form the piece cover 250. The core molten resin MC is a molten resin and is formed by including a room-temperature curable resin material. The operator injects the core molten resin MC into the gap formed between the core 230 and the coil section 211 so as to fill the gap. The core molten resin MC corresponds to the core molten resin. Step P109 corresponds to the core-side injection step. 【0094】 The operator injects molten core resin MC into the gap between the bobbin 240 and the coil section 211 so that a core intervening portion 252 is formed. This molten core resin MC flows through the gap between the bobbin 240 and the coil section 211 into the gap between the two winding sections 212. The molten core resin MC that flows into the gap between the two winding sections 212 forms a winding intervening portion 253. The operator also injects molten core resin MC between the mold and the coil section 211 so that an outer cover portion 251 is formed. This molten core resin MC flows through the gap between the mold and the coil section 211 into the gap between the two winding sections 212. This molten core resin MC also forms a winding intervening portion 253. 【0095】 The viscosity of the core molten resin MC is lower than that of the housing molten resin MH, which will be described later. In other words, the core molten resin MC flows more easily through narrower gaps than the housing molten resin MH. For this reason, even if the gap between the core 230 and the coil section 211 is smaller than the gap between the core piece 210 and the motor outer peripheral wall 71, the core molten resin MC tends to spread throughout the entire gap between the core 230 and the coil section 211. Similarly, even if the gap between the two winding sections 212 is smaller than the gap between the core piece 210 and the motor outer peripheral wall 71, the core molten resin MC tends to spread throughout the entire gap between the two winding sections 212. 【0096】 The viscosity of the core molten resin MC is the viscosity at the time of injection. The viscosity of the housing molten resin MH is the viscosity at the time of injection. Therefore, the viscosity of the core molten resin MC at the time of injection is lower than the viscosity of the housing molten resin MH at the time of injection. For example, the temperature of the core molten resin MC at the time of injection is the same as the temperature of the housing molten resin MH at the time of injection. Therefore, in the temperature range where both the core molten resin MC and the housing molten resin MH are in a molten state, the viscosity of the core molten resin MC at a predetermined temperature is lower than the viscosity of the housing molten resin MH at the same predetermined temperature. The predetermined temperature of the core molten resin MC and the predetermined temperature of the housing molten resin MH are the same temperature. 【0097】 In step P110, the worker forms the piece cover 250 by solidifying the core molten resin MC. The core piece 210 is completed when the worker forms the piece cover 250. The cover outer surface portion 251, the core intervening portion 252, and the winding intervening portion 253 are formed by the solidification of the core molten resin MC. Step P110 corresponds to the core side solidification step. 【0098】Next, the stator process will be explained with reference to the flowchart in Figure 17. In process P201, the worker prepares for the manufacture of the stator 200. For example, the worker prepares the motor outer wall 71, core piece 210, support plates 281A and 281B, etc. 【0099】 In step P202, the worker temporarily fixes the core piece 210 inside the motor outer circumferential wall 71. The worker arranges multiple core pieces 210 along the inner circumferential surface of the motor outer circumferential wall 71 in the motor circumferential direction CD. This operation also involves arranging multiple core pieces 210 along the inner surface of the housing inner surface 70b. Step P202 corresponds to the arrangement process. Then, the worker temporarily fixes the core pieces 210 to the motor outer circumferential wall 71 using fasteners or the like. 【0100】 In steps P203 and P204, the worker forms a housing heat dissipation section 295 between the motor outer peripheral wall 71 and the core piece 210. The worker manufactures the housing heat dissipation section 295 using an insert mold or the like. After forming the housing heat dissipation section 295, the worker may inspect the housing heat dissipation section 295. For example, the worker confirms that the electrical insulation of the housing heat dissipation section 295 is properly ensured. 【0101】 In step P203, the operator injects the housing molten resin MH between the motor outer wall 71 and the core piece 210, with the mold attached to the motor outer wall 71. That is, the operator injects the housing molten resin MH between the inner surface 70b of the housing and the core piece 210. The housing molten resin MH is a molten resin and is formed by including a room-temperature curable resin material. The housing molten resin MH corresponds to the housing molten resin. Step P203 corresponds to the housing side injection step. 【0102】In step P204, the worker forms the housing heat dissipation section 295 by solidifying the molten housing resin MH. Step P204 corresponds to the housing side solidification step. In step P205, the worker fixes the core piece 210 to the motor outer peripheral wall 71 by forming the core piece support section 280. The worker attaches the first support plate 281A to the core piece 210 and fixes it to the motor outer peripheral wall 71. Then, the worker attaches the second support plate 281B to the core piece 210 and fixes it to the motor outer peripheral wall 71, and connects the first support plate 281A and the second support plate 281B with the support pole 291. The stator 200 is completed when the worker forms the core piece support section 280. 【0103】 In this embodiment described above, a core intervening portion 252 is provided to fill the gap formed between the core 230 and the coil portion 211. In this configuration, the transfer of heat from the core 230 to the coil portion 211 is facilitated by the core intervening portion 252. As a result, heat from the core 230 is easily released to the outside of the stator 200 via the core intervening portion 252 and the coil portion 211. Therefore, the heat dissipation effect of the motor device 60 and the core piece 210 can be enhanced by the core intervening portion 252. 【0104】 For example, unlike this embodiment, we can assume a configuration in which there is no core intervening portion 252 between the core 230 and the coil portion 211, and a gap exists between the core 230 and the coil portion 211. In this configuration, there are concerns that the transfer of heat from the core 230 to the coil portion 211 will be hindered by the gap, and that heat from the core 230 and the coil portion 211 will become trapped in the gap. In other words, there are concerns that the small gap between the core 230 and the coil portion 211 will impair the thermal conductivity of the stator 200 and the core piece 210. 【0105】In contrast, in this embodiment, the thermal resistance of the core piece 210 can be reduced by filling the gap formed between the core 230 and the coil portion 211 with a core intervening portion 252, which has better thermal conductivity than air. Therefore, the core intervening portion 252 can eliminate the obstruction of heat transfer due to the gap and the accumulation of heat from the core 230 and the coil portion 211 in the gap. In this way, by filling the small gap between the core 230 and the coil portion 211 with the core intervening portion 252, the cooling performance of the stator 200 and the core piece 210 can be improved. 【0106】 In the motor device 60, the efficiency of the motor 61 can be increased by enhancing the cooling effect of the stator 200 and core piece 210. Therefore, it becomes possible to obtain the desired output by driving the motor 61 without increasing the size of the motor 61 or the cooling system of the motor device 60. Accordingly, the weight increase of the motor device 60 can be suppressed by the core intervening portion 252. 【0107】 According to this embodiment, the core intervening portion 252 is provided between the core 230 and the coil portion 211 in a direction perpendicular to the circumferential direction CD. That is, in an axial gap type motor, the core intervening portion 252 is provided between the core 230 and the coil portion 211 in the radial direction RD. In this configuration, the core intervening portion 252 can be provided on the heat transfer path through which the heat from the core 230 is transferred to the motor outer peripheral wall 71 in the radial direction RD. Therefore, the core intervening portion 252 can promote the release of heat from the core 230 to the outside from the motor outer peripheral wall 71. 【0108】 According to this embodiment, the core intervening portion 252 is provided at least between the core 230 and the housing opposing portion 211b. In this configuration, the core intervening portion 252 can facilitate the transfer of heat from the core 230 to the motor outer peripheral wall 71 via the housing opposing portion 211b. 【0109】According to this embodiment, the core intervening portion 252 is provided to fill the gap formed between the bobbin 240 and the coil portion 211. In this configuration, the transfer of heat from the core 230 to the coil portion 211 via the bobbin 240 is facilitated by the core intervening portion 252. Furthermore, in this configuration, there is no need to use a specially shaped, dedicated bobbin 240 to prevent a gap from forming between the bobbin 240 and the coil portion 211. Therefore, the core intervening portion 252 can achieve both increased versatility of the bobbin 240 and improved heat dissipation of the stator 200. 【0110】 In this embodiment, the core intervening portion 252 and the housing heat dissipation portion 295 are independent components. In this configuration, the characteristics of the core intervening portion 252 and the characteristics of the housing heat dissipation portion 295 can be set individually. For this reason, the core intervening portion 252 can be given characteristics that prioritize ease of filling the narrow gap formed between the core 230 and the coil portion 211, rather than high thermal conductivity. On the other hand, the housing heat dissipation portion 295 can be given characteristics that prioritize high thermal conductivity, rather than ease of filling, because the housing heat dissipation portion 295 fills the wider gap between the coil portion 211 and the outer peripheral wall 71 of the motor. Therefore, it is possible to achieve both reliable filling of the entire gap formed between the core 230 and the coil portion 211 with the core intervening portion 252 and enhancement of the heat dissipation effect of the stator 200 by the housing heat dissipation portion 295. 【0111】 The gap between the motor outer periphery wall 71 and the coil section 211 is easily wide enough to fill the housing heat dissipation section 295. For this reason, it is preferable to select a resin material with the highest possible thermal conductivity for the housing heat dissipation section 295 that fills the gap between the motor outer periphery wall 71 and the coil 64. Also, from the viewpoint of improving the heat dissipation effect of the stator 200, it is better if the thermal conductivity of the core intervening section 252 is as high as possible. However, for the core intervening section 252 that fills the narrow gap between the core 230 and the coil section 211, it is preferable to select a resin material that is easy to fill the gap, even if it means compromising on thermal conductivity. 【0112】According to this embodiment, the thermal conductivity of the core intervening portion 252 is lower than that of the housing heat dissipation portion 295. In this configuration, there is no need to select a material with high thermal conductivity for forming the core intervening portion 252, thus increasing the range of materials that can be easily filled into the gap formed between the core 230 and the coil portion 211. As a result, the core intervening portion 252 can be spread throughout the entire gap formed between the core 230 and the coil portion 211. 【0113】 In this embodiment, a winding intervening portion 253 is provided to fill the gap formed between two adjacent winding portions 212 in the coil axis direction α. ​​In this configuration, the winding intervening portion 253 facilitates the release of heat from the core 230 to the outside of the core piece 210 in the coil radial direction γ through the gap between the two winding portions 212. Therefore, heat from the core 230 and the winding portions 212 is easily released to the outside of the core piece 210. Consequently, the heat dissipation effect of the motor device 60 and the core piece 210 can be enhanced by the winding intervening portion 253. 【0114】 In this embodiment, the winding intervening portion 253 extends from the core intervening portion 252 so as to fit between the two winding portions 212. In this configuration, the core intervening portion 252 and the winding intervening portion 253 are integrated, so heat is easily transferred between the core intervening portion 252 and the winding intervening portion 253. Therefore, the heat dissipation effect of the core piece 210 can be enhanced by releasing heat from one of the core intervening portion 252 and the other winding intervening portion 253. For example, when heat from the core 230 is transferred to the core intervening portion 252, that heat is transferred from the core intervening portion 252 to the outer surface portion 251 of the cover via the winding intervening portion 253, thereby enhancing the heat dissipation effect of the core piece 210. 【0115】In this embodiment, the core intervening portion 252 extends from the outer cover portion 251 so as to enter the gap formed between the core 230 and the coil portion 211. In this configuration, the outer cover portion 251 and the core intervening portion 252 are integrated, so heat is easily transferred between the outer cover portion 251 and the core intervening portion 252. Therefore, the heat dissipation effect of the core piece 210 can be enhanced by releasing heat from the core intervening portion 252 to the outer cover portion 251. For example, when heat from the core 230 or coil portion 211 is transferred from the core intervening portion 252 to the outer cover portion 251, that heat is easily released from the outer cover portion 251 to the outside of the core piece 210. 【0116】 According to this embodiment, the core molten resin MC is injected into the gap formed between the core 230 and the coil portion 211, and the core molten resin MC is solidified. Therefore, a configuration in which a core intervening portion 252 is provided to fill the gap formed between the core 230 and the coil portion 211 can be realized using the core molten resin MC. 【0117】 In this embodiment, the core molten resin MC is injected and solidified for each core piece 210. The core piece 210, after the core intervening portion 252 has been formed by the core molten resin MC, is then installed inside the motor housing 70. This prevents the core molten resin MC from adhering to the motor housing 70, support plates 281A, 281B, etc., as excess resin. 【0118】 For example, unlike this embodiment, consider a configuration in which the core piece 210 without the core intervening portion 252 is installed inside the motor housing 70, and then the core molten resin MC is injected and solidified. In this configuration, there is a concern that the core molten resin MC may adhere to the motor housing 70 or the support plates 281A and 281B. 【0119】 According to this embodiment, a housing molten resin MH is injected between the coil section 211 and the housing 70, and the housing molten resin MH is solidified. Therefore, a configuration in which a housing heat dissipation section 295 is provided between the coil section 211 and the housing 70 can be realized using the housing molten resin MH. 【0120】In this embodiment, the viscosity of the core molten resin MC is lower than that of the housing molten resin. In this configuration, because the viscosity of the core molten resin MC is sufficiently low, the core molten resin MC easily spreads throughout the gap formed between the core 230 and the coil portion 211. Therefore, it is possible to suppress the problem of a gap remaining between the core 230 and the coil portion 211, which would then act as thermal resistance and reduce the heat dissipation effect of the core intervening portion 252. 【0121】 <Second Embodiment> In the second embodiment, multiple winding portions 212 may be arranged in the coil radial direction γ. Configurations, operations, and effects not specifically described in the second embodiment are the same as in the first embodiment. The second embodiment will be described focusing on the differences from the first embodiment. 【0122】 As shown in Figure 18, in the coil section 211, multiple coil wires 213 are wound in overlapping layers. For example, the coil wire 213 is wound twice. Two winding sections 212 are arranged side by side in the coil radial direction γ. The winding intervening section 253 is provided between two adjacent winding sections 212 in the coil radial direction γ. The winding intervening section 253 is provided to fill the gap formed between two adjacent winding sections 212 in the coil radial direction γ. In a configuration where three or more winding sections 212 are arranged side by side in the coil radial direction γ, multiple winding intervening sections 253 are arranged side by side in the coil radial direction γ. 【0123】 During the manufacturing of the motor device 60, in the core piece process, the worker injects the molten core resin MC into the gap between two adjacent windings 212 in the coil radial direction γ. This molten core resin MC flows through the gap between the two adjacent windings 212 in the coil radial direction γ and into the gap between two adjacent windings 212 in the coil axial direction α. ​​In the core piece 210 completed by the solidification of the molten core resin MC, the winding intervening portion 253 filled in the gap between the two adjacent windings 212 in the coil radial direction γ and the winding intervening portion 253 filled in the gap between the two adjacent windings 212 in the coil axial direction α are integrated with each other. 【0124】<Third Embodiment> In the first embodiment described above, the motor 61 is an axial gap type motor. In contrast, in the second embodiment, the motor 61 does not have to be an axial gap type motor. Configurations, operations, and effects not specifically described in the third embodiment are the same as in the first embodiment described above. In this third embodiment, the differences from the first embodiment described above will be explained in detail. 【0125】 As shown in Figures 19 and 20, the motor device 60 is a radial gap type rotating electric machine. In a radial gap type rotating electric machine, the stator 200 and rotor 300 are arranged radially RD with a gap 305 between them. For example, the stator 200 is located on the outer circumference side of the rotor 300. The stator 200 is fixed to the motor housing 70. For example, the stator 200 is fixed to the motor outer wall 71, the rear frame 370, and the drive frame 390, respectively. 【0126】 Multiple core pieces 210 are arranged in the motor circumferential direction CD along the motor outer wall 71, rear frame 370, and drive frame 390. A housing heat dissipation section 295 is provided between the core pieces 210 and the motor outer wall 71, rear frame 370, and drive frame 390. The core pieces 210 are fixed to the motor outer wall 71, rear frame 370, and drive frame 390 via the housing heat dissipation section 295. 【0127】 The core piece 210 is positioned so that the coil axis direction α is the motor radial direction RD. In the core piece 210, the core 230 extends in the motor radial direction RD, and the winding portion 212 is stacked in the motor radial direction RD. The core intervening portion 252 is provided between the core 230 and the coil portion 211 in a direction perpendicular to the rotation direction of the rotor 300. That is, the core intervening portion 252 is provided between the core 230 and the coil portion 211 in the motor axis direction AD. In a radial gap type motor, the direction perpendicular to the rotation direction of the rotor 300 corresponds to the motor axis direction AD. 【0128】In the stator 200, a housing heat dissipation section 295 is provided between the core 230 and the motor outer peripheral wall 71. Additionally, a housing heat dissipation section 295 is provided between the coil section 211 and the plates 370 and 390. Heat transferred from the core 230 and coil section 211 to the piece cover 250 is released to the plates 370 and 390 via the housing heat dissipation section 295. 【0129】 <Fourth Embodiment> In the fourth embodiment, the motor device 60 may be cooled by a refrigerant. Configurations, operations, and effects not specifically described in the fourth embodiment are the same as in the third embodiment described above. In this fourth embodiment, the differences from the third embodiment described above will be explained in detail. 【0130】 As shown in Figure 21, the EPU 50 has a cooling device 400. The cooling device 400 can cool the EPU 50 using a refrigerant. As the refrigerant, a fluid such as a coolant liquid is used. Cooling methods using a refrigerant are sometimes called liquid cooling. The cooling device 400 has a flow path forming section 401, a pump 402, and a heat dissipation section 403. The pump 402 and the heat dissipation section 403 are provided relative to the flow path forming section 401. 【0131】 The flow path forming section 401 forms a flow path through which the refrigerant flows. The flow path forming section 401 is formed, for example, by including piping. The pump 402 can supply refrigerant to the flow path forming section 401. The flow path forming section 401 is provided inside the motor housing 70 and the inverter housing 90 so that the refrigerant cools the motor device 60 and the inverter device 80. The heat dissipation section 403 releases the heat from the refrigerant to the outside of the EPU 50. The heat dissipation section 403 is formed, for example, by including a radiator. The heat dissipation section 403 may also be formed by including heat dissipation fins provided on the outer surface of the motor housing 70. 【0132】In the motor housing 70, at least a portion of the core piece 210 is provided in the flow path. For example, in the motor housing 70, the internal space is divided into a stator space in which the stator 200 is housed and a rotor space in which the rotor 300 is housed. The flow path forming section 401 forms at least a portion of the stator space. The stator space is included in the flow path through which the refrigerant flows. At least a portion of the core piece 210 is provided in the stator space. In the stator space, at least a portion of the core piece 210 is immersed in the refrigerant. In the motor housing 70, the heat from the core piece 210 is directly released to the refrigerant because the refrigerant is in contact with the core piece 210. Oil or the like is used as the refrigerant. 【0133】 Even when the core piece 210 is immersed in refrigerant, it is difficult for the refrigerant to flow into the tiny gap formed between the core 230 and the coil section 211, raising concerns that heat from the core 230 and the coil section 211 may accumulate in that gap. For example, if the pressure at which the pump 402 pumps refrigerant is increased in order to allow the refrigerant to flow into the gap formed between the core 230 and the coil section 211, there are concerns that the motor unit 60 will become larger in size if it is designed to withstand the pressure of the pump 402. Similarly, even if the gap formed between the core 230 and the coil section 211 is enlarged to allow the refrigerant to flow into that gap, there are concerns that the motor unit 60 will become larger in size. 【0134】 In contrast, in the stator 200, a core intervening portion 252 is provided in the gap formed between the core 230 and the coil portion 211, so that heat does not accumulate in the gap, which can be suppressed by the core intervening portion 252. Furthermore, since there is no need to flow a refrigerant through the gap, the size of the motor device 60 can be avoided. In addition, there is no need to consider refrigerant contamination, such as refrigerant dirt entering the gap formed between the core 230 and the coil portion 211. 【0135】In the core piece 210, the heat transfer between the core 230 and the coil portion 211 is enhanced by the core intervening portion 252, so that even if a part of the core piece 210 is not immersed in the refrigerant, the cooling effect of the refrigerant can be applied to the part not immersed in the refrigerant. Furthermore, the heat transfer between the two winding portions 212 is enhanced by the winding intervening portion 253, so even if a part of the core piece 210 is not immersed in the refrigerant, the cooling effect of the refrigerant can be applied to the part not immersed in the refrigerant. 【0136】 <Other Embodiments> The disclosures in this specification are not limited to the exemplary embodiments. The disclosures encompass the exemplary embodiments and variations thereof by those skilled in the art. For example, the disclosures are not limited to the combinations of parts and elements shown in the embodiments, but can be implemented in various variations. The disclosures can be implemented in a variety of combinations. The disclosures may have additional parts that can be added to the embodiments. The disclosures encompass embodiments in which parts and elements have been omitted. The disclosures encompass substitutions or combinations of parts and elements between one embodiment and another. The scope of the disclosed technical field is not limited to the descriptions of the embodiments. The scope of the disclosed technical field is indicated by the claims and should be understood to include all modifications within the meaning and scope equivalent to the claims. 【0137】 In each of the above embodiments, the piece cover 250 may have at least a core intervening portion 252. The core intervening portion 252 may be provided in at least a part of the space between the core 230 and the coil portion 211 in the coil circumferential direction β. The core intervening portion 252 may be provided in at least a part of the space between the core 230 and the coil portion 211 in the coil axial direction α. ​​The piece cover 250 may also have at least a winding intervening portion 253. 【0138】 In each of the above embodiments, the core intervening portion 252 and the winding intervening portion 253 do not have to be integrated. For example, the core intervening portion 252 and the winding intervening portion 253 may be provided independently of each other. That is, the core intervening portion 252 and the winding intervening portion 253 may be provided at positions far apart from each other. 【0139】 In each of the above embodiments, the core intervening portion 252 does not have to be a member formed by injecting core molten resin MC. For example, the core intervening portion 252 may be formed by filling the gap formed between the core 230 and the coil portion 211 by pressing an elastically deformable member into it. The winding intervening portion 253 does not have to be a member formed by injecting core molten resin MC. For example, the winding intervening portion 253 may be formed by filling the gap formed between the two winding portions 212 by pressing an elastically deformable member into it. 【0140】 In each of the above embodiments, the housing heat dissipation portion 295 does not have to be a member formed by injecting the housing molten resin MH. For example, the housing heat dissipation portion 295 may be formed by filling the space between the coil portion 211 and the motor housing 70 with an elastically deformable member. The housing heat dissipation portion 295 may also be formed in a gel-like state or in a film-like state. For example, the housing heat dissipation portion 295 may be formed from a film-like adhesive. During the manufacture of the motor device 60, a film-like adhesive is attached to at least one of the coil portion 211 and the motor housing 70, and the coil portion 211 is installed inside the motor housing 70 such that this adhesive bondes the coil portion 211 to the motor housing 70. 【0141】 In each of the above embodiments, the coil portion 211 does not necessarily have to have the coil wire 213 actually wound around it, as long as it is in a wound state. For example, the coil portion 211 or the winding portion 212 may be formed by connecting multiple short coil wires 213 together. 【0142】 In each of the above embodiments, the insulating portion provided between the coil portion 211 and the core 230 does not have to be a bobbin 240. For example, the insulating portion may be insulating paper or an insulating sheet. Also, an insulating portion does not have to be provided between the coil portion 211 and the core 230. In the core piece 210, regardless of the presence or absence of an insulating portion, it is sufficient that the core intervening portion 252 is provided to fill the gap formed between the core 230 and the coil portion 211. 【0143】 In each of the above embodiments, the aircraft 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 aircraft may be an electric aircraft capable of taking off and landing with a runway. Furthermore, the aircraft may be a rotary-wing aircraft or a fixed-wing aircraft. The aircraft may be an unmanned aircraft that does not carry a person. The unmanned aircraft may have a crew compartment 14 or it may not have a crew compartment 14. Also, the pilot may remotely control the aircraft. The eVTOL 10 may be referred to as a manned aircraft even if it does not carry a person, as long as it is capable of carrying a person. 【0144】 In each of the above embodiments, the mobile body on which the motor device 60 is mounted does not have to be an aircraft, as long as it can be moved by the rotation of a rotating body. For example, the mobile body may be a vehicle, a ship, construction machinery, or agricultural machinery. For example, if the mobile body is a vehicle or construction machinery, the rotating body may be a wheel for movement, and the output shaft may be an axle. If the mobile body is a ship, the rotating body may be a screw propeller for propulsion, and the output shaft may be a propeller shaft. The mobile body may also be an automated guided vehicle (AGV) or an electric wheelchair. For example, an AGV or an electric wheelchair may be equipped with a relatively small motor device 60. 【0145】 In each of the above embodiments, the motor device 60 is not necessarily mounted on a moving object. For example, the motor device 60 may be installed on stationary equipment, machinery, or devices. Thus, the motor device 60 is not limited to moving objects and can be used as a drive device for various applications. 【0146】(Disclosure of Technical Ideas) This specification discloses several technical ideas as described in the following paragraphs. Some paragraphs may be written in a multiple dependent form, where subsequent paragraphs optionally refer to preceding paragraphs. Furthermore, some paragraphs may be written in a multiple dependent form, where they refer to other multiple dependent forms. These paragraphs written in multiple dependent forms define several technical ideas. 【0147】 (Technical Concept 1) A rotating electric machine (60) driven by the supply of electricity, comprising: a stator (200); a rotor (300) that rotates relative to the stator, wherein the stator comprises: a core (230); a coil portion (211) provided on the outer circumference of the core; and a core heat transfer portion (252) that has thermal conductivity and is provided to fill the gap formed between the core and the coil portion. 【0148】 (Technical Concept 2) The rotating electric machine according to Technical Concept 1, wherein the coil sections are arranged in a plurality in the direction of rotation (CD) of the rotor, and the core heat transfer section is provided between the core and the coil sections in directions perpendicular to the direction of rotation (RD, AD). 【0149】 (Technical Concept 3) A rotating electric machine according to Technical Concept 1 or 2, comprising a housing (70) housing the stator and the rotor, wherein in the stator, a plurality of coil portions are arranged in the rotational direction (CD) of the rotor, the coil portion has a coil-facing portion (211a) facing an adjacent coil portion in the rotational direction, and a housing-facing portion (211b) that is arranged in the winding direction (β) in which the coil portion is wound around the core and faces the inner surface (70b) of the housing, and the core heat transfer portion is provided between the core and the housing-facing portion. 【0150】(Technical Idea 4) The stator has an insulating part (240) provided between the core and the coil part, which electrically insulates the core and the coil part, and the core heat transfer part is provided to fill the gap formed between the insulating part and the coil part, the rotating electric machine according to any one of technical ideas 1 to 3. 【0151】 (Technical Idea 5) A rotating electric machine according to any one of Technical Ideas 1 to 4, comprising: a housing (70) housing the stator and the rotor; a housing heat transfer section (295) having thermal conductivity and provided between the housing and the coil section, wherein the core heat transfer section and the housing heat transfer section are independent members. 【0152】 (Technical idea 6) The rotating electric machine described in technical idea 5, wherein the thermal conductivity of the core heat transfer section is lower than that of the housing heat transfer section. 【0153】 (Technical Idea 7) The coil portion has windings (212) wound around the core so as to extend in the winding direction (β) of the coil portion and stacked in the axial direction (α) of the coil portion, and the stator has heat conductive windings (253) provided to fill the gap between two adjacent windings in the axial direction, the rotating electric machine according to any one of Technical Ideas 1 to 6. 【0154】 (Technical idea 8) The rotating electric machine according to technical idea 7, wherein the winding heat transfer section extends from the core heat transfer section so as to enter between two winding sections adjacent to each other in the axial direction. 【0155】 (Technical Idea 9) The stator has a coil covering (251) provided to cover the outer surface of the coil portion, and the core heat transfer portion extends from the coil covering so as to enter the gap formed between the core and the coil portion, as described in any one of Technical Ideas 1 to 8. 【0156】(Technical Concept 10) The stator and rotor are housed in a housing (70) and a housing heat transfer section (295) which has thermal conductivity and is provided between the housing and the coil section, wherein the stator and the rotor are arranged along the rotation axis (Cm) of the rotor, the coil section has winding sections (212) which are wound on the core so as to extend in the winding direction (β) of the coil section and are stacked in the axial direction (α) of the coil section, a coil opposing section (211a) which faces an adjacent coil section in the rotation direction (CD) of the rotor, and a housing opposing section (211b) which is arranged in the winding direction (β) in which the coil section is wound on the core and faces the inner surface (70b) of the housing, wherein a plurality of these are arranged in the rotation direction, the stator has an insulating section (240) which is provided between the core and the coil section and electrically insulates the core and the coil section, A rotating electric machine according to Technical Concept 1, comprising: a core heat transfer portion (252) having thermal conductivity and provided to fill the gap formed between the insulating portion and the coil portion; a winding heat transfer portion (253) having thermal conductivity and provided to fill the gap between two adjacent winding portions in the axial direction; and a coil covering (251) provided to cover the outer surface of the coil portion, wherein the core heat transfer portion is provided between the core and the housing opposing portion and extends from the coil covering into the gap formed between the core and the coil portion; the winding heat transfer portion extends from the core heat transfer portion into the space between two adjacent winding portions in the axial direction; the core heat transfer portion and the housing heat transfer portion are independent members; and the thermal conductivity of the core heat transfer portion is lower than that of the housing heat transfer portion. 【0157】(Technical Concept 11) A housing (70) housing the stator and the rotor, a housing heat transfer section (295) having thermal conductivity and provided between the housing and the coil section, wherein the stator and the rotor are arranged along the rotation axis (Cm) of the rotor, the coil section has winding sections (212) wound around the core so as to extend in the winding direction (β) of the coil section and stacked in the axial direction (α) of the coil section, a coil opposing section (211a) facing an adjacent coil section in the rotation direction (CD) of the rotor, and a housing opposing section (211b) arranged in the winding direction (β) of the coil section winding around the core and facing the inner surface (70b) of the housing, a plurality of these arranged in the rotation direction, the stator has an insulating section (240) provided between the core and the coil section that electrically insulates the core and the coil section, A rotating electric machine according to Technical Concept 1, comprising: a core heat transfer portion (252) having thermal conductivity and provided to fill the gap formed between the insulating portion and the coil portion; a winding heat transfer portion (253) having thermal conductivity and provided to fill the gap between two adjacent winding portions in the axial direction; and a coil covering (251) provided to cover the outer surface of the coil portion, wherein the core heat transfer portion is provided between the core and the housing opposing portion and extends from the coil covering into the gap formed between the core and the coil portion; the winding heat transfer portion extends from the core heat transfer portion into the space between two adjacent winding portions in the axial direction; the core heat transfer portion and the housing heat transfer portion are independent members; and the thermal conductivity of the core heat transfer portion is lower than that of the housing heat transfer portion. 【0158】(Technical Idea 12) A coil module (210) forming a coil (64) of a rotating electric machine (60), comprising: a core (230); a coil portion (211) provided on the outer circumference of the core; and a core heat transfer portion (252) provided to fill the gap formed between the core and the coil portion, and to release heat from the core to the coil portion. 【0159】 (Technical Idea 13) A method for manufacturing a rotating electric machine (60) comprising a stator (200) and a rotor (300) that rotates relative to the stator, comprising: a step (P108) of providing a coil portion (211) on the outer circumference of a core (230); a step (P109) of injecting a core molten resin (MC), which is a molten resin, into the gap formed between the core and the coil portion; and a step (P110) of solidifying the core molten resin to form a core heat transfer portion (252) having thermal conductivity. 【0160】 (Technical idea 14) A method for manufacturing a rotating electric machine according to technical idea 13, comprising: a step of arranging a plurality of the coil sections along the inner surface (70b) of the housing (70) (P202); a step of injecting a housing molten resin (MH), which is a molten resin different from the core molten resin, between the coil section and the housing (P203); and a step of solidifying the housing molten resin to form a housing heat transfer section (295) having thermal conductivity (P204). 【0161】 (Technical idea 15) The method for manufacturing a rotating electric machine according to technical idea 14, wherein the viscosity of the core molten resin is lower than the viscosity of the housing molten resin.

Claims

1. A rotating electric machine (60) driven by the supply of power, comprising: a stator (200); a rotor (300) that rotates relative to the stator, wherein the stator comprises: a core (230); a coil portion (211) provided on the outer circumference of the core; and a core heat transfer portion (252) having thermal conductivity and provided to fill the gap formed between the core and the coil portion.

2. The rotating electric machine according to claim 1, wherein the coil sections are arranged in a plurality in the direction of rotation (CD) of the rotor, and the core heat transfer section is provided between the core and the coil sections in a direction perpendicular to the direction of rotation (RD, AD).

3. A rotating electric machine according to claim 1 or 2, comprising: a housing (70) housing the stator and the rotor, wherein in the stator, a plurality of coil portions are arranged in the direction of rotation (CD) of the rotor, the coil portion has a coil-facing portion (211a) facing an adjacent coil portion in the direction of rotation, and a housing-facing portion (211b) that is aligned with the coil-facing portion in the winding direction (β) in which the coil portion is wound around the core and faces the inner surface (70b) of the housing, and the core heat transfer portion is provided between the core and the housing-facing portion.

4. The rotating electric machine according to claim 1 or 2, wherein the stator has an insulating portion (240) provided between the core and the coil portion, which electrically insulates the core and the coil portion, and the core heat transfer portion is provided to fill the gap formed between the insulating portion and the coil portion.

5. The rotating electric machine according to claim 1 or 2, comprising: a housing (70) housing the stator and the rotor; a housing heat transfer section (295) having thermal conductivity and provided between the housing and the coil section, wherein the core heat transfer section and the housing heat transfer section are independent members.

6. The rotating electric machine according to claim 5, wherein the thermal conductivity of the core heat transfer section is lower than the thermal conductivity of the housing heat transfer section.

7. The rotating electric machine according to claim 1 or 2, wherein the coil portion has multiple winding portions (212) that are wound on the core so as to extend in the winding direction (β) of the coil portion and are stacked in the axial direction (α) of the coil portion, and the stator has a winding heat transfer portion (253) that is thermally conductive and is provided to fill the gap between two adjacent winding portions in the axial direction.

8. The rotating electric machine according to claim 7, wherein the winding heat transfer portion extends from the core heat transfer portion so as to enter between two winding portions adjacent to each other in the axial direction.

9. The rotating electric machine according to claim 1 or 2, wherein the stator has a coil covering (251) provided so as to cover the outer surface of the coil portion, and the core heat transfer portion extends from the coil covering so as to enter into the gap formed between the core and the coil portion.

10. The stator comprises a housing (70) housing the stator and the rotor, and a housing heat transfer section (295) having thermal conductivity and provided between the housing and the coil section, wherein the stator and the rotor are arranged along the rotation axis (Cm) of the rotor, the coil section comprises winding sections (212) wound around the core so as to extend in the winding direction (β) of the coil section and stacked in the axial direction (α) of the coil section, a coil opposing section (211a) facing an adjacent coil section in the rotation direction (CD) of the rotor, and a housing opposing section (211b) arranged in the winding direction (β) of the coil section winding around the core and facing the inner surface (70b) of the housing, a plurality of which are arranged in the rotation direction, the stator comprises an insulating section (240) provided between the core and the coil section, electrically insulating the core and the coil section, The rotating electric machine according to claim 1, comprising: a core heat transfer portion (252) having thermal conductivity and provided to fill the gap formed between the insulating portion and the coil portion; a winding heat transfer portion (253) having thermal conductivity and provided to fill the gap between two adjacent winding portions in the axial direction; and a coil covering (251) provided to cover the outer surface of the coil portion, wherein the core heat transfer portion is provided between the core and the housing opposing portion and extends from the coil covering to enter into the gap formed between the core and the coil portion; the winding heat transfer portion extends from the core heat transfer portion to enter between two adjacent winding portions in the axial direction; the core heat transfer portion and the housing heat transfer portion are independent members; and the thermal conductivity of the core heat transfer portion is lower than the thermal conductivity of the housing heat transfer portion.

11. The stator comprises a housing (70) housing the stator and the rotor, and a housing heat transfer section (295) having thermal conductivity and provided between the housing and the coil section, wherein the stator and the rotor are arranged along the rotation axis (Cm) of the rotor, the coil section comprises winding sections (212) wound around the core so as to extend in the winding direction (β) of the coil section and stacked in the axial direction (α) of the coil section, a coil opposing section (211a) facing an adjacent coil section in the rotation direction (CD) of the rotor, and a housing opposing section (211b) arranged in the winding direction (β) of the coil section winding around the core and facing the inner surface (70b) of the housing, a plurality of which are arranged in the rotation direction, the stator comprises an insulating section (240) provided between the core and the coil section, electrically insulating the core and the coil section, The rotating electric machine according to claim 1, comprising: a core heat transfer portion (252) having thermal conductivity and provided to fill the gap formed between the insulating portion and the coil portion; a winding heat transfer portion (253) having thermal conductivity and provided to fill the gap between two adjacent winding portions in the axial direction; and a coil covering (251) provided to cover the outer surface of the coil portion, wherein the core heat transfer portion is provided between the core and the housing opposing portion and extends from the coil covering to enter into the gap formed between the core and the coil portion; the winding heat transfer portion extends from the core heat transfer portion to enter between two adjacent winding portions in the axial direction; the core heat transfer portion and the housing heat transfer portion are independent members; and the thermal conductivity of the core heat transfer portion is lower than the thermal conductivity of the housing heat transfer portion.

12. A coil module (210) forming a coil (64) of a rotating electric machine (60), comprising: a core (230); a coil portion (211) provided on the outer circumference of the core; and a core heat transfer portion (252) provided to fill the gap formed between the core and the coil portion, and to release heat from the core to the coil portion.

13. A method for manufacturing a rotating electric machine (60) comprising a stator (200) and a rotor (300) that rotates relative to the stator, comprising: a step (P108) of providing a coil portion (211) on the outer circumference of a core (230); a step (P109) of injecting a molten resin, which is a core molten resin (MC), into the gap formed between the core and the coil portion; and a step (P110) of solidifying the core molten resin to form a core heat transfer portion (252) having thermal conductivity.

14. A method for manufacturing a rotating electric machine according to claim 13, comprising: a step of arranging a plurality of the coil portions along the inner surface (70b) of the housing (70) (P202); a step of injecting a housing molten resin (MH), which is a molten resin different from the core molten resin, between the coil portion and the housing (P203); and a step of solidifying the housing molten resin to form a housing heat transfer portion (295) having thermal conductivity (P204).

15. The method for manufacturing a rotating electric machine according to claim 14, wherein the viscosity of the core molten resin is lower than the viscosity of the housing molten resin.

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