JP2023048115A - Rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine that can enhance reliability against vibration.SOLUTION: A motor device 60 includes a motor 61 and a motor case 550. The motor case 550 accommodates a wall power bus bar 565, a stator 200, and rotors 300a and 300b. The motor case 550 includes a motor outer peripheral wall 551, a first opposing wall 552, and a second opposing wall 553. The wall power bus bar 565 is fixed to the motor outer peripheral wall 551. The wall power bus bar 565 is laid on a motor inner wall surface 551b. The wall power bus bar 565 extends in a circumferential direction CD along the motor inner wall surface 551b. The wall power bus bar 565 is provided at a position separated away from the stator 200, the rotors 300a and 300b, and the first opposing wall 552 in an axial direction AD.SELECTED DRAWING: Figure 84

Description

The disclosure in this specification relates to a rotating electric machine.

Patent Document 1 describes an axial gap type motor. In an axial gap type motor, a rotor and a stator are arranged in the axial direction. In this motor, a rotor and a stator are housed in a housing. Inside the housing, a bus bar electrically connected to the coils is provided on the opposite side of the stator via the rotor in the axial direction. The busbar is supported by a support attached to the stator. The support portion extends radially from the busbar.

JP 2016-96705 A

In Patent Literature 1, it is considered that axial vibration is likely to occur in the motor due to the fact that the rotor and the stator are arranged in the axial direction. Moreover, in Patent Document 1, since the support portion that supports the busbar extends in the radial direction, when the motor vibrates in the axial direction, the busbar tends to vibrate significantly in the axial direction together with the support portion. As described above, in Patent Literature 1, there is a concern that the reliability of the rotating electric machine against vibration will be lowered.

A main object of the present disclosure is to provide a rotating electric machine capable of improving reliability against vibration.

The multiple aspects disclosed in this specification employ different technical means to achieve their respective objectives. In addition, the symbols in parentheses described in the claims and this section are an example showing the correspondence relationship with the specific means described in the embodiment described later as one aspect, and limit the technical scope isn't it.

To achieve the above objectives, the disclosed aspects include:
A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having coils (211);
Rotors (300a, 300b) that rotate about a rotation axis (Cm) and are aligned with the stator in an axial direction (AD) in which the rotation axis extends;
an electric machine case (550) having an electric machine outer peripheral wall (551) extending in the axial direction and accommodating a stator and a rotor inside the electric machine outer wall;
energization bus bars (565, 615) electrically connected to the coils and fixed to the outer peripheral wall of the electric machine while extending along the inner wall surface (551b) of the outer peripheral wall of the electric machine in the circumferential direction (CD) of the rotation axis;
It is a rotating electric machine equipped with

According to the above aspect, the power bus bar is fixed to the outer peripheral wall of the electric machine extending in the axial direction. In this configuration, even if axial vibration occurs with the rotation of the rotor, the electric bus bar is also less likely to vibrate due to the fact that the outer peripheral wall of the electric machine is less likely to vibrate in the axial direction. Therefore, in the current-carrying bus bar, the outer peripheral wall of the electric machine increases the resistance to vibration in the axial direction. Moreover, the conducting bus bar extends in the circumferential direction along the inner wall surface of the outer peripheral wall of the electric machine. For this reason, the vibration resistance of the outer peripheral wall of the electric machine is imparted to the entire circumferential direction of the current-carrying bus bar. In this way, by using the outer peripheral wall of the electric machine, the vibration resistance of the current-carrying bus bar can be improved over a wide range. Therefore, it is possible to improve the reliability of the rotating electric machine against vibration.

The figure which shows the structure of the drive system in 1st Embodiment. FIG. 2 is a front view of the motor device unit; FIG. 2 is a longitudinal sectional view of the motor device unit; FIG. 2 is an exploded perspective view of the motor device unit; The perspective view of a motor apparatus. FIG. 2 is a longitudinal sectional view of the motor device; The top view of the motor apparatus in the structure group Aa. FIG. 2 is a longitudinal sectional view of the motor device; The top view of an electric power busbar. FIG. 2 is a plan view of a stator showing the configuration of a coil unit; The perspective view of a neutral point unit. FIG. 4 is a longitudinal sectional view of the rotor and shaft in the configuration group Ab; A perspective view of a coil wire. FIG. 4 is a plan view of the stator and motor housing in the configuration group Ac; The perspective view of a neutral point unit. 3 is a perspective view of the motor device in the configuration group Ad; FIG. The top view of a motor apparatus. FIG. 4 is a vertical cross-sectional view around a relay terminal in the motor device; FIG. 2 is a plan view of the motor device in the configuration group Ae; FIG. 4 is a vertical cross-sectional view around a relay terminal in the motor device in the configuration group Af; The top view of a motor apparatus. FIG. 4 is a longitudinal sectional view of the motor device in the configuration group Ag; The top view of a motor apparatus. FIG. 2 is a longitudinal sectional view of a rotor and a shaft in structural group Ba; The top view of the rotor seen from the rotor 1st surface side. The top view of the rotor seen from the rotor 2nd surface side. The figure which shows the arrangement|sequence of the magnet in a motor. FIG. 4 is a vertical cross-sectional view of the rotor and shaft in the configuration group Bb; FIG. 4 is a vertical cross-sectional view of the periphery of magnets in the rotor. FIG. 4 is a vertical cross-sectional perspective view of the periphery of magnets in the rotor. The top view of the rotor seen from the rotor 1st surface side. The top view of a magnet unit. FIG. 10 is a vertical cross-sectional perspective view of the magnet periphery of the rotor in the configuration group Bc; The top view of an inclined magnet unit and a parallel magnet unit. The top view of the rotor seen from the rotor 1st surface side. FIG. 4 is a vertical cross-sectional view of the rotor and shaft in component group Bd; The top view of the rotor seen from the rotor 2nd surface side. The top view of the rotor seen from the rotor 1st surface side. A perspective view of a shaft. FIG. 4 is a longitudinal sectional view of the rotor and shaft in the structural group Be; FIG. 3 is a vertical cross-sectional perspective view of a first rotor and a second rotor; FIG. 4 is a longitudinal sectional view of the rotor and shaft in the structural group Bf; The figure for demonstrating the positional relationship of a 1st holder fixing device and a 2nd holder fixing device. FIG. 3 is a perspective view of the motor viewed from the first rotor side; A plan view of the shaft. FIG. 4 is a longitudinal cross-sectional perspective view of a motor housing and a coil protection portion in the configuration group Ca; FIG. 3 is a vertical cross-sectional perspective view of the motor housing; FIG. 4 is a schematic vertical cross-sectional view of a motor housing and a coil protector; FIG. 4 is a schematic cross-sectional view of a motor housing and a coil protector; FIG. 4 is a vertical cross-sectional perspective view of the motor housing in the configuration group Cb; FIG. 10 is a longitudinal sectional view around a grommet in the motor device in the configuration group Cc; FIG. 4 is a vertical cross-sectional perspective view of a motor housing and a coil protection portion; FIG. 3 is a vertical cross-sectional perspective view of the motor housing; FIG. 4 is a perspective view of a core unit in the configuration group Cd; FIG. 4 is a perspective view of a core unit in the configuration group Ce; FIG. 4 is a vertical cross-sectional perspective view of a motor housing and a coil protection portion; 4 is a perspective view of a core unit in the configuration group Cf; FIG. A perspective view of a core. Cross-sectional view of the core. 4 is a perspective view of a core-forming plate; FIG. FIG. 4 is a perspective view of a core unit in the configuration group Cg; The perspective view of the core unit seen from the flange recessed part side. The side view of the core unit seen from the flange concave portion side. FIG. 4 is a front view of the core unit as seen from the inside in the radial direction; The perspective view of a neutral point unit. FIG. 4 is a vertical cross-sectional view of a motor device unit in configuration group Da; The top view of a stator and a motor housing. FIG. 4 is a vertical cross-sectional view of the rotor and stator in the configuration group Db; FIG. 69 is a perspective view of the shaft from the underside of FIG. 68; FIG. 69 is a plan view of the shaft seen from the underside of FIG. 68; Front view of the shaft. LXXII-LXXII line sectional view of FIG. FIG. 4 is a longitudinal sectional view of a rotor and a stator in component group Dc; The top view of the rotor seen from the rotor 2nd surface side. FIG. 3 is a plan view of the motor device in the configuration group Dd; The perspective view of a neutral point unit. FIG. 2 is a plan view of a motor device in structural group De; FIG. 3 is a perspective view of the motor device in the configuration group Df; The top view of a motor housing and a stator. The top view which looked at the motor housing from the 2nd rotor side. 3 is a perspective view of the motor device in the configuration group Dg; FIG. The top view which looked at the motor apparatus from the drive-frame side. FIG. 2 is a longitudinal sectional view of the motor device unit; FIG. 11 is a vertical cross-sectional view of the motor device in the configuration group P and the third embodiment; FIG. 4 is an enlarged vertical cross-sectional view of the periphery of the inner busbar unit; FIG. 11 is an enlarged longitudinal sectional view around the inner busbar unit in the fourth embodiment; FIG. 11 is an enlarged vertical cross-sectional view of the periphery of the inner busbar unit in the fifth embodiment; FIG. 11 is an enlarged vertical cross-sectional view of the periphery of the inner busbar unit in the sixth embodiment; The longitudinal cross-sectional view of the motor apparatus in 7th Embodiment. The longitudinal cross-sectional view of the motor apparatus in 8th Embodiment. FIG. 11 is a vertical cross-sectional view of a motor device according to a ninth embodiment;

A plurality of modes for carrying out the present disclosure will be described below with reference to the drawings. In each form, the same reference numerals may be given to the parts corresponding to the matters described in the preceding form, and overlapping explanations may be omitted. When only a part of the configuration is described in each form, the previously described other forms can be applied to other parts of the configuration. Not only combinations of parts that are explicitly stated that combinations are possible in each embodiment, but also partial combinations of embodiments even if they are not explicitly stated unless there is a particular problem with the combination. is also possible.

<First embodiment>
A drive system 30 shown in FIG. 1 is mounted on a moving object such as a vehicle or an aircraft. Vehicles equipped with the drive system 30 include, for example, electric vehicles (EV), hybrid vehicles (HV), and fuel cell vehicles. Air vehicles include aircraft such as vertical takeoff and landing aircraft, rotary wing aircraft and fixed wing aircraft. There is eVTOL as a vertical take-off and landing aircraft. eVTOL is an electric vertical take-off and landing aircraft, and is an abbreviation for electric Vertical Take-Off and Landing aircraft.

The drive system 30 is a system that drives the mobile object to move. If the mobile object is a vehicle, the drive system 30 drives the vehicle, and if the mobile object is an aircraft, the drive system 30 drives the aircraft to fly.

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

The motor device unit 50 is a device that drives to move the moving body, and corresponds to a driving device. The motor device unit 50 has a motor device 60 and an inverter device 80 . The motor device 60 has a motor 61 . The inverter device 80 has an inverter 81 . Battery 31 is electrically connected to motor 61 via inverter 81 . Electric power is supplied to the motor 61 from the battery 31 through the inverter 81 . Motor 61 is driven according to the voltage and current supplied from inverter 81 .

The motor 61 is a multi-phase AC motor. The motor 61 is, for example, a three-phase AC motor, and has U-phase, V-phase, and W-phase. The motor 61 is a movement drive source for moving the moving body, and functions as an electric motor. A brushless motor, for example, is used as the motor 61 . The motor 61 functions as a generator during regeneration. Note that the motor 61 corresponds to a rotating electric machine, and the motor device unit 50 corresponds to a rotating electric machine unit.

The motor 61 has a multi-phase coil 211 . The coil 211 is a winding and forms an armature. A coil 211 is provided for each of the U-phase, V-phase, and W-phase. In the motor 61, multi-phase coils 211 are star-connected. A star connection is sometimes referred to as a Y connection. Motor 61 has a neutral point 65 . The multi-phase coils 211 are connected to each other at a neutral point 65 .

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

The inverter device 80 has a P line 141 and an N line 142 . P line 141 and N line 142 electrically connect battery 31 and inverter 81 . P line 141 is electrically connected to the positive electrode of battery 31 . N line 142 is electrically connected to the negative electrode of 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 a power line on the high potential side and is sometimes called a high potential line. The N line 142 is a power line on the low potential side and is sometimes referred to as a low potential line.

Motor device unit 50 has an output line 143 . The output line 143 is a power line for supplying power. The output line 143 electrically connects the motor 61 and the inverter 81 . The output line 143 is in a state of being bridged between the motor device 60 and the inverter device 80 .

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

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

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

Arms 85 a and 85 b have arm switches 86 and diodes 87 . The arm switch 86 is formed of a switching element such as a semiconductor element. The switching elements include power elements such as IGBTs and MOSFETs. IGBT is an abbreviation for Insulated Gate Bipolar Transistor. MOSFET is an abbreviation for Metal-Oxide-Semiconductor Field-Effect Transistor.

Arms 85a and 85b each have one arm switch 86 and one diode 87 . In arms 85a and 85b, diodes 87 are connected in anti-parallel to arm switches 86 for freewheeling. The collector of the arm switch 86 is connected to the P line 141 in the upper arm 85a. The emitter of the arm switch 86 is connected to the N line 142 in the lower arm 85b. The emitter of the arm switch 86 on the upper arm 85a and the collector of the arm switch 86 on the lower arm 85b are connected to each other. The diode 87 has its anode connected to the emitter of the corresponding arm switch 86 and its cathode connected to its collector. Note that the arm switch 86 can also be called a semiconductor switch.

The motor device unit 50 has a control device 54 . Control device 54 is included in inverter device 80 . The control device 54 is an ECU, for example, and controls driving of the inverter 81 . ECU is an abbreviation for Electronic Control Unit. The control device 54 is mainly composed of a microcomputer having, for example, a processor, memory, I/O, and a bus connecting them. A memory is a non-transitory physical storage medium that non-temporarily stores computer-readable programs and data. A non-transitional tangible storage medium is a non-transitory tangible storage medium, which is implemented by a semiconductor memory, a magnetic disk, or the like. In FIG. 1, the controller 54 is illustrated as CD.

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

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

The temperature sensor 431 can detect the temperature of the motor 61 and corresponds to a temperature detection section. A temperature sensor 431 outputs a detection signal corresponding to the temperature of the motor 61 . The temperature sensor 431 detects the temperature of the motor 61, for example, the temperature of the stator 200, which will be described later. Note that the temperature sensor 431 may detect the temperature of any part of the motor 61 .

The resolver 421 and temperature sensor 431 are electrically connected to the controller 54 . Resolver 421 is connected to controller 54 by signal line 425 . A detection signal output by the resolver 421 is input to the control device 54 via the signal line 425 . Temperature sensor 431 is connected to controller 54 by signal line 435 . A detection signal output by the temperature sensor 431 is input to the control device 54 via the signal line 435 . The signal lines 425 and 435 are included in the motor device unit 50 and are in a state of being bridged between the motor device 60 and the inverter device 80 .

As shown in FIGS. 2 and 3, in the motor device unit 50, the motor device 60 and the inverter device 80 are arranged along the motor axis Cm. The motor device 60 and the inverter device 80 are fixed to each other by fasteners such as bolts. The motor axis Cm is a virtual line extending linearly. If the direction in which the motor axis Cm extends is called the axial direction AD, the axial direction AD, the radial direction RD, and the circumferential direction CD of the motor axis Cm are orthogonal to each other. Note that the outer side in the radial direction RD may be referred to as the radial outer side, and the inner side in the radial direction RD may be referred to as the radial inner side. 3 shows a longitudinal section of the motor device unit 50 extending along the motor axis Cm.

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

The motor housing 70 has a housing body 71 and motor fins 72 . The housing main body 71 forms an outer peripheral surface 70a. The motor fins 72 are radiation fins provided on the outer peripheral surface 70a. The motor fins 72 increase the surface area of the motor housing 70 and improve the heat dissipation effect of the motor housing 70 . The motor fins 72 protrude radially outward from the outer peripheral surface 70a. The motor fins 72 extend in the axial direction AD along the outer peripheral surface 70a. A plurality of motor fins 72 are arranged in the circumferential direction CD.

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

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

As shown in FIG. 2, the motor device unit 50 has a unit duct 100. As shown in FIG. The unit duct 100 is made of a resin material or the like. The unit duct 100 accommodates the motor housing 70 and the inverter housing 90 . Unit duct 100 is formed in a tubular shape as a whole and extends along motor axis Cm. The unit duct 100 spans the motor housing 70 and the inverter housing 90 in the axial direction AD. The unit duct 100 covers the motor housing 70 and the inverter housing 90 from the outer peripheral side. Unit duct 100 is fixed to at least one of motor housing 70 and inverter housing 90 . In the unit duct 100, openings are formed at both ends in the axial direction AD.

The inner peripheral surface of the unit duct 100 faces the outer peripheral surfaces 70 a and 90 a via the motor fins 72 and the inverter fins 92 . The inner peripheral surface of the unit duct 100 is spaced radially outward from the outer peripheral surfaces 70a and 90a. In the motor device unit 50, duct flow paths are formed between the outer peripheral surfaces 70a and 90a and the inner peripheral surface of the unit duct 100. As shown in FIG. This duct flow path is opened in the axial direction AD through the opening of the unit duct 100 . In the motor device unit 50 , heat is easily released from the motor fins 72 and the inverter fins 92 by passing gas such as air through the duct flow paths.

The inner peripheral surface of the unit duct 100 is close to or in contact with the tip surfaces of the motor fins 72 and the inverter fins 92 . In this configuration, the gas passing through the duct channel in the axial direction AD easily passes through the positions overlapping the motor fins 72 and the inverter fins 92 in the radial direction RD. Therefore, the heat dissipation effect of the motor fins 72 and the inverter fins 92 can be easily improved.

As shown in FIG. 3 , the inverter device 80 has an inverter lid portion 99 in addition to the inverter housing 90 . The inverter lid portion 99 is made of a metal material or the like and has thermal conductivity. The inverter lid portion 99 extends in a direction perpendicular to the motor axis Cm. In the inverter housing 90 , an opening formed at one end in the axial direction AD is covered with an inverter lid portion 99 .

The motor device 60 has a drive frame 390 in addition to the motor housing 70 . The drive frame 390 is made of a metal material or the like and has thermal conductivity. The drive frame 390 extends in a direction perpendicular to the motor axis Cm. In the motor housing 70 , an opening formed at one end in the axial direction AD is covered with the drive frame 390 . Drive frame 390 is secured to motor housing 70 by frame fasteners 405 . The frame fixture 405 is a fixture such as a bolt. Frame fixture 405 is threaded to drive frame 390 and motor housing 70 via washer 406 .

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

In the motor device unit 50 , one end in the axial direction AD is formed by the inverter lid portion 99 . A drive frame 390 forms the other end in the axial direction AD.

The motor device unit 50 has a unit housing 51 . The unit housing 51 includes an inverter housing 90 , an inverter lid portion 99 , a motor housing 70 and a drive frame 390 . The outer peripheral surface of the unit housing 51 is formed by the inverter housing 90 and the motor housing 70 . In the unit housing 51 , one of the pair of end faces is formed by the inverter lid portion 99 and the other is formed by the drive frame 390 . The unit duct 100 covers the outer peripheral surface of the unit housing 51 .

As shown in FIGS. 3 and 4, motor 61 has stator 200 , rotor 300 and shaft 340 . Rotor 300 rotates relative to stator 200 around motor axis Cm. Rotor 300 is a rotor and is sometimes referred to as a rotor subassembly. A motor axis Cm is the center line of the rotor 300 and corresponds to the rotation axis. Shaft 340 is fixed to rotor 300 and rotates with rotor 300 . Shaft 340 is the rotating shaft of motor 61 . The centerline of shaft 340 coincides with motor axis Cm. The centerline of stator 200 coincides with motor axis Cm. Stator 200 is a stator and is sometimes referred to as a stator subassembly.

The motor device 60 is an axial gap type rotary electric machine. In the motor 61, a stator 200 and a rotor 300 are arranged in the axial direction AD along the motor axis Cm. Rotor 300 is in a state of being superimposed on stator 200 in the axial direction AD, and rotates relative to stator 200 in this state.

The motor device 60 is a double rotor type rotary electric machine and has two rotors 300 . The two rotors 300 are arranged side by side in the axial direction AD. A stator 200 is provided between two rotors 300 in the axial direction AD. Shaft 340 is fixed to both rotors 300 . The two rotors 300 rotate together with the shaft 340 . When the two rotors 300 are called a first rotor 300a and a second rotor 300b, the first rotor 300a is provided on the rear frame 370 side with respect to the stator 200. As shown in FIG. The second rotor 300 b is provided on the opposite side of the inverter device 80 with respect to the stator 200 . A rotating electric machine of the axial gap type and the double rotor type is sometimes referred to as a double axial motor.

As shown in FIGS. 3 and 6, the stator 200 extends in the circumferential direction CD around the motor axis Cm and has an annular shape as a whole. The stator 200 has a coil unit 210 and a coil protector 250 . The coil unit 210 has a coil section 215 . A plurality of coil portions 215 are arranged in the circumferential direction CD. In the coil unit 210 , a coil 211 is composed of at least one coil portion 215 . The multi-phase coils 211 are arranged in the circumferential direction CD in the coil unit 210 . 6, illustration of the coil protection portion 250 is omitted.

The coil protection portion 250 is made of a resin material or the like. The coil protection part 250 is made of, for example, an epoxy-based thermosetting resin. The coil protection part 250 is, for example, molded resin formed by molding. The coil protection part 250 has electrical insulation. The coil protection portion 250 has thermal conductivity, and heat from the coil portion 215 is easily transferred. The coil protector 250 has a higher thermal conductivity than, for example, air.

The coil protection part 250 covers the coil unit 210 and protects the coil unit 210 . The coil protection portion 250 extends in the circumferential direction CD around the motor axis Cm. Coil protection portion 250 is formed in an annular shape as a whole. The coil protection portion 250 seals the coil 211 and the coil portion 215 . Coil protector 250 contacts both coil portion 215 and motor housing 70 . The coil protection portion 250 facilitates conducting heat from the coil portion 215 to the motor housing 70 .

The rotor 300 extends in the circumferential direction CD around the motor axis Cm and has an annular shape as a whole. Rotor 300 is formed in a plate shape as a whole. The rotor 300 has magnets 310 and magnet holders 320 . A plurality of magnets 310 are arranged in the circumferential direction CD. Magnet 310 is a permanent magnet and forms a magnetic field. A magnet holder 320 supports a plurality of magnets 310 . The magnet holder 320 extends in the circumferential direction CD around the motor axis Cm. The magnet holder 320 is formed in an annular shape as a whole.

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

The motor device 60 has a first bearing 360 and a second bearing 361 . Bearings 360 and 361 rotatably support shaft 340 . Rotor 300 is rotatably supported by bearings 360 and 361 via shaft 340 . The first bearing 360 and the second bearing 361 are arranged in the axial direction AD. A shaft flange 342 is provided between the first bearing 360 and the second bearing 361 in the axial direction AD. The first bearing 360 is attached to a rear frame 370 which will be described later, and fixed to the motor housing 70 via the rear frame 370 . The second bearing 361 is attached to the drive frame 390 and fixed to the motor housing 70 via the drive frame 390 .

As shown in FIGS. 3, 4, and 6, the motor device 60 has a busbar unit 260, a rear frame 370, a dust cover 380, a retainer plate 410, a resolver 421, and a resolver cover 424. 3, illustration of the dust cover 380 is omitted.

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

The dustproof cover 380 extends in the circumferential direction CD around the motor axis Cm. The dustproof cover 380 is formed in an annular shape as a whole. The dustproof cover 380 is laid on the rear frame 370 from the inverter device 80 side. The dustproof cover 380 is made of a resin material or the like, and has a structure that does not allow foreign matter such as dust to pass through. The dustproof cover 380 prevents foreign matter from entering from one of the internal space of the motor housing 70 and the internal space of the inverter housing 90 to the other.

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

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

The busbar protection portion 270 is made of a resin material or the like, and has electrical insulation. The busbar protection unit 270 covers the power busbars 261 and protects the power busbars 261 . The busbar protection portion 270 extends in the circumferential direction CD around the motor axis Cm. Busbar protection portion 270 is formed in an annular shape as a whole.

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

As shown in FIGS. 3, 4, and 6, the retainer plate 410 extends in the circumferential direction CD around the motor axis Cm. Retainer plate 410 is formed in an annular shape as a whole. A retainer plate 410 secures the second bearing 361 to the drive frame 390 . The retainer plate 410 is fixed to the drive frame 390 with the second bearing 361 interposed therebetween.

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

A reduction gear 53 is attached to the motor device unit 50 . The speed reducer 53 mechanically connects the motor 61 and an external device. For example, an external device is mechanically connected to the rotary shaft of the motor 61 via the speed reducer 53 . The speed reducer 53 reduces the speed of rotation of the motor 61 and transmits it to an external device. External devices include wheels, propellers, and the like. The speed reducer 53 is configured including a plurality of gears, and is sometimes called a transmission gear and a gearbox. The speed reducer 53 has a structure adapted to the motor characteristics of the motor 61 . The speed reducer 53 is fixed to the drive frame 390 by a speed reducer fixture 53a. The reducer fixture 53a is a fixture such as a bolt.

<Constituent Group Aa>
As shown in FIGS. 7, 8 and 9, the power busbar 261 has a busbar main body 262 and a busbar terminal 263 . The busbar main body 262 extends in the circumferential direction CD around the motor axis Cm. The busbar main body 262 is formed in an annular shape as a whole. The busbar main body 262 is formed in a plate shape as a whole and extends in a direction perpendicular to the motor axis Cm. The busbar terminal 263 extends from the busbar main body 262 in a direction crossing the circumferential direction CD. The busbar terminal 263 extends radially inward from the busbar body 262 . Bus bar terminal 263 is formed in a plate shape as a whole. 7, illustration of the dust cover 380 is omitted.

A plurality of power bus bars 261 are arranged in the axial direction AD. For example, the plurality of power bus bars 261 include a U-phase power bus bar 261 , a V-phase power bus bar 261 , and a W-phase power bus bar 261 . In the plurality of power busbars 261, respective busbar main bodies 262 are stacked in the axial direction AD. The plurality of busbar main bodies 262 are provided at positions aligned with the stator 200 in the axial direction AD. In the plurality of power busbars 261, respective busbar terminals 263 are located apart in the circumferential direction CD.

The motor device 60 has a stator-side space S1 and an inverter-side space S2. The stator-side space S<b>1 and the inverter-side space S<b>2 are included in the internal space of the motor device 60 and are spaces partitioned by the rear frame 370 . The stator-side space S1 and the inverter-side space S2 are arranged in the axial direction AD with the rear frame 370 interposed therebetween. The stator-side space S1 is a space closer to the stator 200 than the rear frame 370 is. The stator-side space S1 is a space between the rear frame 370 and the drive frame 390 in the axial direction AD. The inverter-side space S2 is a space closer to the inverter device 80 than the rear frame 370 is. The inverter-side space S2 is a space between the rear frame 370 and the inverter housing 90 in the axial direction AD. Note that the internal space of the inverter device 80 may be included in the inverter-side space S2. Further, the stator-side space S1 corresponds to the first space, the inverter-side space S2 corresponds to the second space, and the rear frame 370 corresponds to the space partition.

The power busbar 261 is provided in the inverter-side space S2. The busbar unit 260 is stacked on the rear frame 370 from the inverter device 80 side. The busbar protection portion 270 is fixed to the rear frame 370 with fasteners such as screws.

As shown in FIG. 8 , the busbar protection portion 270 has a plurality of protection plates 271 . The protection plate 271 is made of a resin material or the like and has electrical insulation. The protection plate 271 is formed in a plate shape and extends in a direction perpendicular to the axial direction AD. The protection plate 271 extends in the circumferential direction CD around the motor axis Cm. The protective plate 271 is formed in an annular shape as a whole. A plurality of protection plates 271 are stacked in the axial direction AD via the busbar body 262 . Two bus bar main bodies 262 adjacent to each other with the protective plate 271 interposed therebetween in the axial direction AD are provided with electrical insulation by the protective plate 271 .

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

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

As shown in FIGS. 7 and 10, the neutral point busbar 290 is provided at a position spaced apart from the busbar main body 262 in the radial direction RD. The neutral point busbar 290 is located radially inwardly spaced from the busbar main body 262 .

As shown in FIG. 10, coil unit 210 has neutral point unit 214 . A plurality of neutral point units 214 are arranged in the circumferential direction CD. Neutral point unit 214 has a plurality of coil portions 215 and one neutral point bus bar 290 . In the neutral point unit 214 , the multi-phase coils 211 are star-connected by the neutral point 65 . In the coil unit 210, a plurality of star-connected multi-phase coils 211 are arranged in the circumferential direction CD by arranging a plurality of neutral point units 214 in the circumferential direction CD.

As shown in FIG. 11, in the neutral point unit 214, the coil portions 215 are arranged in the circumferential direction CD, so that the multi-phase coils 211 are arranged in the circumferential direction CD. In the neutral point unit 214, a power lead wire 212 and a neutral lead wire 213 extend from the coil 211 for each of the multiple phases. The power lead-out line 212 is drawn radially outward from the coil 211 and extends in the axial direction AD toward the power bus bar 261 . Power lead-out line 212 is electrically connected to power bus bar 261 . The neutral lead wire 213 is drawn radially inward from the coil 211 . Neutral lead wire 213 is electrically connected to neutral point bus bar 290 .

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

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

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

In the neutral point unit 214, the coil 211, the power lead wire 212, and the neutral lead wire 213 are denoted by U-phase, V-phase, and W-phase, respectively. Then, in the neutral point unit 214, one U-phase coil 211U, one V-phase coil 211V, and one W-phase coil 211W are arranged in the circumferential direction CD. Similarly, one U-phase power lead wire 212U, one V-phase power lead wire 212V, and one W-phase power lead wire 212W are arranged in the circumferential direction CD. A U-phase neutral lead wire 213U, a V-phase neutral lead wire 213V, and a W-phase neutral lead wire 213W are arranged one by one in the circumferential direction CD.

<Constituent group Ab>
As shown in FIG. 12, the motor 61 has a first rotor 300a and a second rotor 300b. The motor 61 has a first gap G1 and a second gap G2. A first gap G1 is a gap between the stator 200 and the first rotor 300a. A second gap G2 is a gap between the stator 200 and the second rotor 300b. The first gap G1 and the second gap G2 are arranged in the axial direction AD with the stator 200 interposed therebetween. The motor 61 is sometimes called a double-gap rotating electric machine.

As shown in FIG. 13, the coil wire 220 has a conductor portion 221 and a covering portion 222 . The conductor portion 221 has conductivity and is a portion through which current flows in the coil wire 220 . The covering portion 222 is made of a resin material or the like, and has electrical insulation. The covering portion 222 covers the conductor portion 221 . The conductor portion 221 has a plurality of strands 223 . The wire 223 is made of a conductive material such as copper, and is a portion through which current flows in the conductor portion 221 . Coil wire 220 is sometimes referred to as stranded wire and split copper wire.

<Constituent group Ac>
As shown in FIGS. 14 and 15, in the coil unit 210, the plurality of coil portions 215 includes a first coil portion 215a and a second coil portion 215b. The first coil portions 215a and the second coil portions 215b are alternately arranged in the circumferential direction CD. In the coil unit 210, one of the two coil portions 215 adjacent in the circumferential direction CD is the first coil portion 215a, and the other is the second coil portion 215b.

In the coil unit 210, the two coil portions 215 adjacent in the circumferential direction CD have different numbers of turns. The number of turns of the coil portion 215 is the number of turns of the coil wire 220 in the coil portion 215 . The number of turns of the first coil portion 215a and the number of turns of the second coil portion 215b are different. For example, the number of turns of the first coil portion 215a is greater than the number of turns of the second coil portion 215b.

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

<Constituent group Ad>
16, 17 and 18, relay terminal 280 and power bus bar 261 are electrically connected. In the power busbar 261, the busbar terminal 263 is connected to the relay terminal 280 by a connector such as a screw. A connector is a conductive member for conducting an electric current.

The motor device 60 has a terminal base 285 . The terminal base 285 is made of a resin material or the like and has electrical insulation. A terminal base 285 supports a connecting portion between the relay terminal 280 and the busbar terminal 263 . For example, by screwing a connector to the terminal base 285 , the connecting portion between the relay terminal 280 and the bus bar terminal 263 is fixed to the terminal base 285 . In other words, the relay terminal 280 and the busbar terminal 263 are connected by the terminal base 285 . The terminal block 285 corresponds to a terminal block. Relay terminal 280 is electrically connected to inverter 81 . The relay terminal 280 is formed of, for example, a busbar member and corresponds to a relay busbar.

As shown in FIG. 18, the terminal base 285 has a base surface 285a. The pedestal surface 285a extends in a direction perpendicular to the motor axis Cm. The relay terminal 280 has a relay connection portion 280a, and the busbar terminal 263 has a busbar connection portion 263a. The relay connection portion 280a and the busbar connection portion 263a are connected to each other by a connector while being superimposed on the pedestal surface 285a. One of the relay connection portion 280a and the busbar connection portion 263a is sandwiched between the other and the base surface 285a.

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

A terminal base 285 is provided for each of the multiple phases. A plurality of terminal bases 285 are arranged in the circumferential direction CD along the busbar unit 260 . For example, the plurality of terminal blocks 285 include a U-phase terminal block 285, a V-phase terminal block 285, and a W-phase terminal block 285. The terminal base 285 is provided at a position aligned with the busbar unit 260 in the radial direction RD. The terminal base 285 is located radially inwardly spaced from the busbar unit 260 .

<Constituent group Ae>
As shown in FIG. 19, a plurality of relay terminals 280 are arranged with sufficient spacing. The distance between two adjacent relay terminals 280 in the circumferential direction CD is sufficiently large. For example, in a configuration in which three relay terminals 280 are arranged in the circumferential direction CD, the separation angle between two adjacent relay terminals 280 is approximately 120 degrees.

Assume that in the motor device 60, a plurality of virtual divided regions RE are arranged in the circumferential direction CD. A plurality of divided regions RE are regions divided at equal intervals around the motor axis Cm in the circumferential direction CD. The number of divided areas RE is the same as the number of relay terminals 280 . For example, when there are three relay terminals 280, there are also three divided areas RE. In this case, the three divided regions RE are divided by 120 degrees around the motor axis Cm in the circumferential direction CD.

One relay terminal 280 is arranged in each of the plurality of divided areas RE. For example, one relay terminal 280 is arranged in each of the three divided regions RE. If three relay terminals 280 are arranged at intervals of 120 degrees, one relay terminal 280 is necessarily arranged in each of the three divided areas RE. Even if the separation angle of the three relay terminals 280 is more or less than 120 degrees, at least two of the relay terminals 280 are sufficiently separated.

As with the plurality of relay terminals 280, the plurality of busbar terminals 263 and the plurality of terminal bases 285 are also arranged with sufficient spacing in the circumferential direction CD. For example, when there are three busbar terminals 263 and three terminal bases 285, one busbar terminal 263 and one terminal base 285 are arranged in each of the three divided regions RE.

<Constituent group Af>
As shown in FIGS. 20 and 21, rear frame 370 supports both busbar unit 260 and first bearing 360 . The rear frame 370 has a busbar support portion 371 and a bearing support portion 372 . The rear frame 370 corresponds to the support frame, and the first bearing 360 corresponds to the bearing.

The busbar support portion 371 is a portion of the rear frame 370 that supports the busbar unit 260 . The busbar support portion 371 supports the power busbar 261 by supporting the busbar protection portion 270 . The busbar support portion 371 includes at least a portion of the rear frame 370 that overlaps the busbar unit 260 in the axial direction AD. A busbar unit 260 is fixed to the busbar support portion 371 by a fastener such as a bolt. The busbar support portion 371 extends in the circumferential direction CD around the motor axis Cm. The busbar support portion 371 is formed in an annular shape as a whole. The busbar support portion 371 is located radially inwardly away from the outer peripheral edge of the rear frame 370 . The busbar support portion 371 is located radially outwardly away from the inner peripheral edge of the rear frame 370 . The busbar support portion 371 and the bearing support portion 372 are separated from each other in the radial direction RD.

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

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

<Constituent group Ag>
As shown in FIG. 22, the resolver 421 is provided in the inverter side space S2. The resolver 421 is stacked on the rear frame 370 from the inverter device 80 side.

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

At least part of the resolver connector 423 is exposed to the inverter device 80 side without being covered by the resolver cover 424 . Note that the resolver cover 424 may be included in the resolver 421 .

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

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

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

As shown in FIGS. 24 and 25 , in rotor 300 , a plurality of magnets 310 are arranged along rotor first surface 301 . The magnets 310 are exposed on the rotor first surface 301 but not on the rotor second surface 302 . The magnet 310 is covered with the magnet holder 320 from the rotor second surface 302 side.

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

As shown in FIG. 27, the plurality of magnets 310 included in the rotor 300 include a first peripheral magnet 311a, a second peripheral magnet 311b, a first inner magnet 312a, a second inner magnet 312b, and a first outer magnet 313a. , a second outer magnet 313b. These peripheral magnets 311a, 311b, inner magnets 312a, 312b, and outer magnets 313a, 313b are arranged to strengthen the magnetic force on the stator 200. As shown in FIG. Such an arrangement of magnets 310 is sometimes referred to as a Halbach arrangement. Note that FIG. 27 is a plan view of the arrangement of the magnets 310 when the rotor 300 is viewed from the outside in the radial direction.

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

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

The plurality of magnets 310 includes a pair of inner magnets 312a and 312b. The pair of inner magnets 312a and 312b are adjacent in the circumferential direction CD. If the boundary portion between the pair of inner magnets 312a and 312b is called an inner boundary portion BI, the first inner magnet 312a and the second inner magnet 312b forming the inner boundary portion BI form the pair of inner magnets 312a. , 312b. The pair of inner shaft magnets 312a and 312b are oriented obliquely with respect to the motor axis Cm so as to face the stator 200 side in the axial direction AD and face each other in the circumferential direction CD.

The first outer magnets 313a and the second outer magnets 313b are alternately arranged in the circumferential direction CD. The first outer magnets 313a and the second outer magnets 313b are alternately arranged one by one in the circumferential direction CD. The first outer magnet 313a and the second outer magnet 313b are magnets oriented obliquely with respect to the motor axis Cm so as to face the opposite side of the stator 200 in the axial direction AD. In the circumferential direction CD, the first outer magnet 313a and the second outer magnet 313b are oriented in opposite directions. In the circumferential direction CD, the first outer magnet 313a is oriented toward the same side as the first circumferential magnet 311a. In the circumferential direction CD, the second outer magnet 313b is oriented toward the same side as the second circumferential magnet 311b. The first outer magnet 313a and the second outer magnet 313b correspond to the outer magnet.

The plurality of magnets 310 includes a pair of outer magnets 313a and 313b. The pair of outer magnets 313a and 313b are adjacent in the circumferential direction CD. When the boundary between the pair of outer magnets 313a and 313b is called an outer boundary BO, the first outer magnet 313a and the second outer magnet 313b that form the outer boundary BO are connected to the pair of outer magnets 313a and 313b. , 313b. The pair of outer shaft magnets 313a and 313b are oriented obliquely with respect to the motor axis Cm so as to face the opposite side of the stator 200 in the axial direction AD and the opposite sides of each other in the circumferential direction CD. .

In the circumferential direction CD, a plurality of pairs of inner magnets 312a and 312b and a plurality of pairs of outer magnets 313a and 313b are arranged. The pair of inner magnets 312a and 312b and the pair of outer magnets 313a and 313b are alternately arranged in pairs in the circumferential direction CD. The pair of inner magnets 312a and 312b and the pair of outer magnets 313a and 313b are arranged so that the first inner magnet 312a and the first outer magnet 313a are adjacent to each other in the circumferential direction CD via the first circumferential magnet 311a. are placed in In other words, the first circumferential magnet 311a is provided between the first inner magnet 312a and the first outer magnet 313a in the circumferential direction CD. The pair of inner magnets 312a and 312b and the pair of outer magnets 313a and 313b are configured such that the second inner magnet 312b and the second outer magnet 313b are adjacent to each other in the circumferential direction CD via the second circumferential magnet 311b. arranged to fit. In other words, the second circumferential magnet 311b is provided between the second inner magnet 312b and the second outer magnet 313b in the circumferential direction CD.

The plurality of magnets 310 includes a pair of circumferential magnets 311a and 311b. The pair of peripheral magnets 311a and 311b are adjacent to each other via the pair of inner magnets 312a and 312b. A pair of circumferential magnets 311a and 311b are oriented so as to face each other in the circumferential direction CD.

The plurality of magnet units 316 includes a first orientation unit 319a and a second orientation unit 319b. A plurality of the first alignment units 319a and a plurality of the second alignment units 319b are arranged in the circumferential direction CD. The first alignment units 319a and the second alignment units 319b are alternately arranged one by one in the circumferential direction CD. The orientations of the first orientation unit 319a and the second orientation unit 319b are opposite to each other as a whole.

The first orientation unit 319a has one first circumferential magnet 311a, one first inner magnet 312a and one first outer magnet 313a. In the first orientation unit 319a, the first circumferential magnet 311a is arranged between the first inner magnet 312a and the first outer magnet 313a. In the first orientation unit 319a, the first circumferential magnet 311a, the first inner magnet 312a, and the first outer magnet 313a are fixed together to form a unit.

The second orientation unit 319b has one second circumferential magnet 311b, one second inner magnet 312b and one second outer magnet 313b. In the second orientation unit 319b, a second circumferential magnet 311b is arranged between the second inner magnet 312b and the second outer magnet 313b. In the second orientation unit 319b, the second circumferential magnet 311b, the second inner magnet 312b, and the second outer magnet 313b are fixed to each other to form a unit.

The first rotor 300a and the second rotor 300b are provided point-symmetrically to each other. The first rotor 300a is arranged in a direction rotated by 180 degrees with respect to the second rotor 300b. The rotor first surfaces 301 of the first rotor 300a and the second rotor 300b face each other with the stator 200 interposed therebetween. When viewed from the side opposite to the stator 200, the first rotor 300a and the second rotor 300b have circumferential magnets 311a and 311b, inner magnets 312a and 312b, and outer magnets 313a and 313b in the circumferential direction CD. are in the same order.

In the first rotor 300a and the second rotor 300b, the respective first circumferential magnets 311a are arranged in the axial direction AD. In the first rotor 300a and the second rotor 300b, a pair of inner magnets 312a and 312b possessed by one and a pair of outer magnets 313a and 313b possessed by the other are arranged in the axial direction AD. In this configuration, one first inner magnet 312a and the other first outer magnet 313a are arranged in the axial direction AD. In addition, one second inner magnet 312b and the other second outer magnet 313b are arranged in the axial direction AD. Furthermore, one inner boundary portion BI and the other outer boundary portion BO are arranged in the axial direction AD.

<Construction group Bb>
As shown in FIGS. 28, 29 and 30, the rotor 300 has a fixing block 330 and a magnet fixture 335 in addition to the magnet holder 320 and the magnets 310 . The magnet fixture 335 is a fixture such as a bolt, and is made of a metal material or the like. Magnet fixture 335 secures magnet 310 to magnet holder 320 via securing block 330 . In the rotor 300 , the magnet 310 and the fixed block 330 are provided on the rotor first surface 301 side with respect to the magnet holder 320 . The magnet 310 is stacked on the magnet holder 320 from the rotor first surface 301 side in the axial direction AD. Magnet 310 is sandwiched between fixed block 330 and magnet holder 320 in axial direction AD. The magnet fixture 335 is screwed to the fixing block 330 through the magnet holder 320 from the rotor second surface 302 side.

The magnet holder 320 has a holder main body 321 and an outer peripheral engaging portion 322 . The holder main body 321 extends in a direction orthogonal to the motor axis Cm and is formed in a plate shape as a whole. A holder body 321 forms the main part of the magnet holder 320 . The holder main body 321 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape as a whole. The magnet holder 320 has a holder inner peripheral end 320a (see FIG. 31) and a holder outer peripheral end 320b. The holder inner peripheral end 320 a is the inner peripheral end of the magnet holder 320 , and the holder outer peripheral end 320 b is the outer peripheral end of the magnet holder 320 . The holder main body 321 forms a holder inner peripheral end 320a and a holder outer peripheral end 320b.

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

The fixed block 330 is made of a metal material or the like. The fixed block 330 is provided on the side opposite to the outer peripheral engaging portion 322 via the magnet 310 in the radial direction RD. The fixing block 330 has a portion extending radially outward, and the magnet 310 is sandwiched between this portion and the holder body 321 . The fixed block 330 has a block tapered surface 330a. Block tapered surface 330 a is included in the outer surface of fixed block 330 . The block tapered surface 330a is an inclined surface that is inclined with respect to the motor axis Cm. The block tapered surface 330a faces radially outward and is inclined with respect to the motor axis Cm so as to face the holder main body 321 side. The magnet 310 enters between the block tapered surface 330a and the holder main body 321 from the outside in the radial direction.

The magnet 310 is provided between the outer peripheral engaging portion 322 and the fixed block 330 in the radial direction RD. The magnet 310 is fixed to the holder main body 321 while being sandwiched between the outer peripheral engaging portion 322 and the fixed block 330 in the radial direction RD.

As shown in FIG. 31 , a plurality of fixing blocks 330 and magnet fixtures 335 are arranged in the circumferential direction CD together with the magnets 310 . The fixed block 330 is in a state of being stretched over the plurality of magnets 310 in the circumferential direction CD. The outer peripheral engaging portion 322 extends along the holder outer peripheral end 320b. The outer engaging portion 322 extends in the circumferential direction CD around the motor axis Cm and is formed in an annular shape as a whole.

The fixing block 330 and the magnet fixture 335 fix the magnet 310 by fixing the magnet unit 316 to the magnet holder 320 . A plurality of magnet units 316 are arranged in the circumferential direction CD together with the fixing blocks 330 and the magnet fixtures 335 .

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

A pair of unit side surfaces 316 c are arranged in the magnet unit 316 in the circumferential direction CD. A pair of unit side surfaces 316c extend in the radial direction RD. The unit side surface 316c spans the unit inner peripheral end 316a and the unit outer peripheral end 316b in the radial direction RD.

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

In the magnet unit 316, at least one magnet 310 forms a unit inner peripheral end 316a, a unit outer peripheral end 316b, a unit side surface 316c, an inner peripheral tapered surface 316d, and an outer peripheral tapered surface 316e.

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

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

Next, a method for manufacturing the motor device 60 will be described. The process of manufacturing motor device 60 includes the process of manufacturing rotor 300 . The operator prepares the magnet unit 316, the magnet holder 320, the fixing block 330, and the magnet fixture 335 as a preparatory step. Then, the operator inserts the magnet unit 316 from the inside in the radial direction between the holder main body 321 and the outer peripheral engaging portion 322 of the magnet holder 320 . After that, the worker puts the magnet unit 316 on top of the holder main body 321 , sandwiches the magnet unit 316 between the fixing block 330 and the holder main body 321 , and attaches the fixing block 330 to the holder main body with the magnet fixture 335 . 321. As the operator screws the magnet fixture 335 into the holder body 321, the outer tapered surface 316e is pressed against the engagement tapered surface 322a, and the block tapered surface 330a is pressed against the inner tapered surface 316d.

<Construction group Bc>
As shown in FIGS. 33 , 34 and 35 , the plurality of magnet units 316 includes tilted magnet units 317 and parallel magnet units 318 . A plurality of the inclined magnet units 317 and the parallel magnet units 318 are arranged in the rotor 300 in the circumferential direction CD. The inclined magnet units 317 and the parallel magnet units 318 are alternately arranged one by one in the circumferential direction CD.

As shown in FIG. 34, in the inclined magnet unit 317, a pair of unit side surfaces 316c are inclined radially outward and away from each other. In the tilt magnet unit 317, the distance between the pair of unit side surfaces 316c gradually increases radially outward. In the inclined magnet unit 317, the unit outer peripheral end 316b is longer than the unit inner peripheral end 316a in the radial direction RD. The inclined magnet unit 317 is formed in a trapezoidal or sectoral shape as a whole.

In the parallel magnet unit 318, a pair of unit side surfaces 316c extend in parallel. A pair of unit side surfaces 316c extend in a direction perpendicular to the circumferential direction CD. In the parallel magnet unit 318, the distance between the pair of unit side surfaces 316c is uniform in the radial direction RD. In the parallel magnet unit 318, the unit outer peripheral end 316b and the unit inner peripheral end 316a have substantially the same length in the radial direction RD. The parallel magnet unit 318 is formed in a rectangular shape as a whole.

Next, among the methods of manufacturing the motor device 60, a method of manufacturing the rotor 300 will be described. In the process of manufacturing the rotor 300, the worker fixes the magnet unit 316 to the magnet holder 320 with the fixing block 330 and the magnet fixture 335, as described above. As the plurality of magnet units 316, the operator arranges the inclined magnet units 317 and the parallel magnet units 318 on the magnet holder 320 so that they are alternately arranged in the circumferential direction CD. For both the inclined magnet unit 317 and the parallel magnet unit 318, the operator inserts the unit outer peripheral end 316b between the outer peripheral engaging portion 322 and the holder main body 321. As shown in FIG. The operator arranges the last magnet unit 316 in the magnet holder 320 to be the parallel magnet unit 318 . The operator inserts the last parallel magnet unit 318 between two inclined magnet units 317 adjacent in the circumferential direction CD, and inserts the unit outer peripheral end 316b between the outer peripheral engaging portion 322 and the holder main body 321. get in.

The operator may fix the magnet unit 316 to the magnet holder 320 with the fixing block 330 and the magnet fixture 335 each time the magnet unit 316 is placed on the magnet holder 320 . Alternatively, after arranging all the magnet units 316 in the magnet holder 320 , the operator may fix all the magnet units 316 to the magnet holder 320 with the fixing blocks 330 and the magnet fixtures 335 .

For example, unlike the present embodiment, assume a configuration in which all of the plurality of magnet units 316 are tilt magnet units 317 . In this configuration, an operator cannot insert the last tilt magnet unit 317 between two tilt magnet units 317 adjacent in the circumferential direction CD in the manufacturing process of the rotor 300 . This is because, on the radially inner side of the outer peripheral engaging portion 322, the distance between two adjacent inclined magnet units 317 in the circumferential direction CD is equal to the width dimension of the unit outer peripheral end 316b of the last inclined magnet unit 317. because it is smaller than

On the other hand, in the present embodiment, the operator sets the last one magnet unit 316 to a parallel magnet unit 318, so that the parallel magnet unit 318 can be used as the two inclined magnet units 317 adjacent in the circumferential direction CD. can be interposed. This is because the distance between the two adjacent inclined magnet units 317 in the circumferential direction CD is the same in the area radially inside the outer peripheral engaging portion 322 and the area inside the outer peripheral engaging portion 322 . be.

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

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

The rim 344 has a pair of rim tips 344a. A rim 344 extends from the spokes 343 in both axial directions AD. In the rim 344, a pair of rim tip portions 344a are aligned in the axial direction AD. The rim tip portion 344a is located at a position spaced apart from the spokes 343 in the axial direction AD. The height dimension of the rim 344 is larger than the height dimension of the spokes 343 in the axial direction AD.

As shown in FIGS. 36, 37, and 38, the rotor 300 is laid on the shaft flange 342 from one side in the axial direction AD. At least the rim tip portion 344 a of the shaft flange 342 is in contact with the rotor 300 . Of the portions of shaft 340 that come into contact with rotor 300, the radially outermost portion is rim tip portion 344a. Rim tip portion 344 a is located radially inwardly spaced from magnet 310 on rotor 300 . The holder fixture 350 is positioned radially inwardly spaced from the rim tip 344a. The holder fixture 350 is on the opposite side of the magnet 310 via the rim tip 344a in the radial direction RD.

The holder fixture 350 fixes the magnet holder 320 and the shaft flange 342 while being inserted into the holder fixing hole 325 and the flange fixing hole 345 . The holder fixing holes 325 are provided in the magnet holder 320 . The holder fixing hole 325 penetrates the magnet holder 320 in the axial direction AD. A plurality of holder fixing holes 325 are arranged in the circumferential direction CD. The holder fixing hole 325 is located radially inwardly spaced from the rim 344 . A flange fixing hole 345 is provided in the shaft flange 342 . The flange fixing holes 345 are provided in the spokes 343, for example. The flange fixing hole 345 penetrates the shaft flange 342 in the axial direction AD. A plurality of flange fixing holes 345 are arranged in the circumferential direction CD. The flange fixing hole 345 is located radially inwardly spaced from the rim 344 . For example, holder fasteners 350 are threaded through holder fastener holes 325 to flange fastener holes 345 .

As shown in FIG. 36, in the motor device 60, an attractive force F1 is generated with respect to the rotor 300. As shown in FIG. The attraction force F<b>1 is a force with which the magnet 310 is attracted toward the coil 211 in the axial direction AD, and is generated by the magnetic force of the magnet 310 . Attractive force F1 is a force that tends to bend the peripheral portion of magnet 310 in rotor 300 toward stator 200 .

In motor device 60 , bending stress F<b>2 that resists attraction force F<b>1 is generated in rotor 300 . Bending stress F2 is a force that tends to bend the peripheral portion of magnet 310 in rotor 300 to the side opposite to stator 200 . Bending stress F2 is generated by holder fixture 350 pressing rotor 300 toward stator 200 . Holder fixture 350 applies pressing force F3 to rotor 300 . The pressing force F3 is a force that presses the rotor 300 toward the stator 200 in the axial direction AD. In the rotor 300, the bending stress F2 is generated by the rim tip portion 344a serving as a fulcrum for the pressing force F3. Note that the holder fixture 350 corresponds to the pressing member, and the rim tip portion 344a corresponds to the fulcrum.

For example, unlike the present embodiment, a configuration is assumed in which the pressing force F3 by the holder fixture 350 is not generated. In this configuration, there is concern that the peripheral portion of the magnet 310 in the rotor 300 approaches the stator 200 side in the axial direction AD, and the rotor 300 warps toward the stator 200 side with the rim tip portion 344a as a fulcrum. On the other hand, in the present embodiment, the pressing force F3 generated by the holder fixture 350 suppresses the deformation of the rotor 300 so as to warp toward the stator 200 with the rim tip portion 344a as a fulcrum.

<Constituent group Be>
As shown in FIGS. 40 and 41 , the holder fixture 350 is fixed to a portion of the shaft flange 342 radially inner than the rim 344 . A holder fixture 350 is screwed through the magnet holder 320 to the spoke 343 at a position spaced radially inward from the rim 344 . A rotor gap GR is provided between the portion of the magnet holder 320 to which the holder fixture 350 is fixed and the portion of the spoke 343 to which the holder fixture 350 is fixed.

A portion of the magnet holder 320 to which the holder fixture 350 is fixed is a holder fixing hole 325 in the magnet holder 320 into which the holder fixture 350 is inserted. A portion of the spoke 343 to which the holder fixture 350 is fixed is a flange fixing hole 345 in the spoke 343 into which the holder fixture 350 is inserted. A rotor gap GR is a space formed between the rotor 300 and the shaft flange 342 in the axial direction AD. A rotor gap GR is formed between the magnet holder 320 and the spokes 343 in the axial direction AD. Radially inside the rim 344 , the magnet holder 320 and the spokes 343 are separated in the axial direction AD.

The holder fixture 350 can increase or decrease the width dimension of the rotor gap GR in the axial direction AD. As the amount of screwing of the holder fixture 350 into the spoke 343 increases, the portion of the magnet holder 320 to which the holder fixture 350 is fixed approaches the portion of the spoke 343 to which the magnet fixture 335 is fixed, and the rotor gap GR becomes smaller. As the screwing amount of the holder fixture 350 increases, the pressing force F3 increases and the bending stress F2 increases. Therefore, the rotor gap GR is secured between the shaft flange 342 and the rotor 300, so that the bending stress F2 for resisting the attraction force F1 can be adjusted.

For example, unlike the present embodiment, a configuration is assumed in which the portion of the magnet holder 320 to which the holder fixture 350 is fixed and the portion of the spoke 343 to which the holder fixture 350 is fixed are in contact with each other. In this configuration, it is difficult to further deform the magnet holder 320 by the holder fixture 350, and it is difficult to further increase the pressing force F3. Therefore, for example, even if the pressing force F3 is insufficient with respect to the attraction force F1, there is a concern that the shortage cannot be resolved. In contrast, in the present embodiment, since the portion of the magnet holder 320 to which the holder fixture 350 is fixed and the portion of the spoke 343 to which the holder fixture 350 is fixed are separated in the axial direction AD, It is possible to further increase the pressing force F3.

Next, a method of assembling the rotor 300 and the shaft 340 among the methods of manufacturing the motor device 60 will be described. In the process of attaching the rotor 300 to the shaft 340 , an operator inserts the holder fixture 350 into the holder fixing hole 325 and the flange fixing hole 345 . When screwing the holder fixture 350 inserted through the holder fixing hole 325 into the flange fixing hole 345 , the operator may bend the magnet holder 320 around the magnet 310 to the rotor second surface 302 side. Adjust the screwing amount of the holder fixture 350 . That is, the operator adjusts the pressing force F3 with the holder fixture 350 .

Thereafter, in the step of attaching stator 200 to rotor 300 and shaft 340, the operator confirms that the peripheral portion of magnet 310 in rotor 300 is not warped in axial direction AD. In the rotor 300 , when the peripheral portion of the magnet 310 is along the axial direction AD, the operator adjusts the screwing amount of the holder fixture 350 to eliminate the warpage of the rotor 300 . That is, the operator adjusts the pressing force F3 with the holder fixture 350 so that the bending stress F2 becomes the same as the attraction force F1.

<Constructive group Bf>
As shown in FIGS. 43, 44, and 45, in the shaft flange 342, the plurality of flange fixing holes 345 provided in the spokes 343 include first flange fixing holes 345a and second flange fixing holes 345b. . If the holder fixing hole 325 provided in the first rotor 300a is called a first holder fixing hole 325a, the first holder fixing hole 325a and the first flange fixing hole 345a are arranged in the axial direction AD. When the holder fixing hole 325 provided in the second rotor 300b is called a second holder fixing hole 325b, the second holder fixing hole 325b and the second flange fixing hole 345b are arranged in the axial direction AD. The first flange fixing holes 345a and the second flange fixing holes 345b are arranged alternately, for example, in the circumferential direction CD.

Note that FIG. 43 is a schematic view of the longitudinal section of the motor 61 in which the arrangement of the holder fixtures 350 is developed on a plane when the first rotor 300a, the second rotor 300b, and the shaft flange 342 are viewed from the inside in the radial direction.

As shown in FIGS. 42, 43, and 44, the motor device 60 has a first holder fixture 350a and a second holder fixture 350b as holder fixtures 350. As shown in FIGS. First holder fixture 350 a secures first rotor 300 a to shaft flange 342 . The first holder fixture 350a is inserted into the first holder fixing hole 325a and the first flange fixing hole 345a. The first holder fixture 350a is screwed into the first flange fixing hole 345a through, for example, the first holder fixing hole 325a. Note that the first holder fixture 350a corresponds to the first fixture. The first holder fixing hole 325a corresponds to the first rotor hole, and the first flange fixing hole 345a corresponds to the first shaft hole.

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

The first holder fixing hole 325a and the second holder fixing hole 325b are provided at positions spaced apart in the circumferential direction CD. The first flange fixing hole 345a and the second flange fixing hole 345b are spaced apart in the circumferential direction CD according to the positional relationship between the first holder fixing hole 325a and the second holder fixing hole 325b.

As shown in FIGS. 42 and 43, the motor device 60 has positioning pins 355 . The positioning pin 355 determines the relative position between the rotor 300 and the shaft 340 in the direction perpendicular to the axial direction AD. The positioning pin 355 regulates positional displacement of the rotor 300 with respect to the shaft 340 in a direction perpendicular to the axial direction AD. For example, the positioning pin 355 restricts the positional displacement of the rotor 300 with respect to the shaft 340 in the circumferential direction CD.

As shown in FIGS. 42, 43, and 44, the motor device 60 has holder pin holes 327. As shown in FIGS. Holder pin holes 327 are included in rotor 300 . Holder pin holes 327 are provided in the magnet holder 320 . The holder pin hole 327 penetrates the magnet holder 320 in the axial direction AD. A plurality of holder pin holes 327 are arranged in the circumferential direction CD. The holder pin holes 327 are spaced radially inward from the rim 344 . In the magnet holder 320, holder fixing holes 325 and holder pin holes 327 are arranged in the circumferential direction CD.

Motor device 60 has flange pin holes 348 . Flange pin holes 348 are included in shaft 340 . A flange pin hole 348 is provided in the shaft flange 342 . The flange pin holes 348 are provided in the spokes 343, for example. The flange pin hole 348 penetrates the shaft flange 342 in the axial direction AD. A plurality of flange pin holes 348 are arranged in the circumferential direction CD. Flange pin holes 348 are spaced radially inwardly from rim 344 . In the shaft 340, the flange fixing holes 345 and the flange pin holes 348 are arranged in the circumferential direction CD.

The holder pin hole 327 and the flange pin hole 348 are arranged in the axial direction AD. The positioning pin 355 is inserted into each of the holder pin hole 327 and the flange pin hole 348 in a state of spanning the holder pin hole 327 and the flange pin hole 348 in the axial direction AD. The positioning pin 355 is fitted in each of the holder pin hole 327 and the flange pin hole 348 . For example, the locating pin 355 is press fit into the flange pin hole 348 and has a clearance fit in the holder pin hole 327 . The positioning pin 355 is designed so as not to play with the holder pin hole 327 and the flange pin hole 348 . The positioning pin 355 does not move relative to the holder pin hole 327 and the flange pin hole 348 in the direction perpendicular to the axial direction AD. For example, the positioning pin 355 does not move relative to the holder pin hole 327 and the flange pin hole 348 in the circumferential direction CD.

The holder fixture 350 is likely to rattle with respect to the holder fixing hole 325 and the flange fixing hole 345 . For example, it is conceivable that the holder fixing hole 325 moves relative to the holder fixing hole 325 and the flange fixing hole 345 in the circumferential direction CD. In this case, there is concern that the rotor 300 and the shaft 340 may be relatively displaced in the circumferential direction CD. On the other hand, since the positioning pin 355 and the holder pin hole 327 and the flange pin hole 348 do not play back, the positional deviation between the rotor 300 and the shaft 340 is suppressed by the positioning pin 355 . The positioning pin 355, holder pin hole 327 and flange pin hole 348 are also shown in FIGS.

The holder pin holes 327 provided in the first rotor 300a are referred to as first holder pin holes 327a, and the holder pin holes 327 provided in the second rotor 300b are referred to as second holder pin holes 327b. A plurality of positioning pins 355 are included in the motor device 60 . The plurality of positioning pins 355 include positioning pins 355 that position the first rotor 300 a and the shaft 340 . This positioning pin 355 is fitted into the first holder pin hole 327a. Further, the plurality of positioning pins 355 include positioning pins 355 for positioning the second rotor 300b and the shaft 340. As shown in FIG. This positioning pin 355 is fitted into the second holder pin hole 327b.

The first holder pin hole 327a and the second holder pin hole 327b are arranged in the axial direction AD with the flange pin hole 348 interposed therebetween. That is, the first holder pin hole 327a and the second holder pin hole 327b are not separated in the circumferential direction CD. The positioning pin 355 fitted in the first holder pin hole 327a and the positioning pin 355 fitted in the second holder pin hole 327b are arranged in the axial direction AD. Therefore, it is difficult for the first rotor 300a and the second rotor 300b to have a difference in balance such as rotational balance due to the positioning pin 355 .

For example, unlike the present embodiment, assume a configuration in which the first holder pin hole 327a and the second holder pin hole 327b are shifted in the circumferential direction CD. In this configuration, there is a concern that the first rotor 300a and the second rotor 300b may have different balance due to the position of the positioning pin 355 being shifted in the circumferential direction CD.

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

The flange pin hole 348 is provided in the thick flange portion 347 of the shaft flange 342 . The flange pin hole 348 penetrates the thick flange portion 347 in the axial direction AD. In the motor device 60 , the flange pin hole 348 is located in the thick flange portion 347 , so that the flange pin hole 348 and the holder pin hole 327 are positioned as close as possible in the axial direction AD. A portion of the positioning pin 355 between the flange pin hole 348 and the holder pin hole 327 in the axial direction AD is as short as possible. Therefore, it is less likely that the portion of the positioning pin 355 between the flange pin hole 348 and the holder pin hole 327 is deformed and the rotor 300 is displaced relative to the shaft 340 in the circumferential direction CD. It's becoming

Since the flange pin hole 348 is provided in the thick flange portion 347, the portion of the positioning pin 355 that fits into the flange pin hole 348 is made as long as possible in the axial direction AD. For this reason, the positioning pin 355 can easily stand with high positional accuracy with respect to the flange pin hole 348 . Further, the shaft flange 342 has a thick flange portion 347 and is locally thick. Therefore, unlike a configuration in which the entire shaft flange 342 is thick, for example, the weight of the shaft flange 342 can be reduced, and the positioning pin 355 is less likely to rattle with respect to the flange pin hole 348 .

In the motor device 60, the first rotor 300a and the second rotor 300b have a point-symmetrical relationship. Therefore, one of the two members used as the rotor 300 can be used as the first rotor 300a, and the other can be arranged point-symmetrically with respect to the first rotor 300a to be used as the second rotor 300b. By sharing the members used as the first rotor 300a and the members used as the second rotor 300b in this way, the cost for manufacturing the first rotor 300a and the second rotor 300b can be reduced.

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

The motor housing 70 has a stator holding portion 171 . The stator holding portion 171 is a convex portion provided on the inner peripheral surface 70b. The stator holding portion 171 protrudes radially inward from the housing body 71 . A plurality of stator holding portions 171 are arranged in at least one of the circumferential direction CD and the axial direction AD. The stator holding portion 171 forms an inner peripheral surface 70b together with the housing main body 71. As shown in FIG.

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

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

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

As shown in FIGS. 48 and 49, inside the motor housing 70, the coil protection portion 250 overlaps the inner peripheral surface 70b. The coil protection portion 250 is in close contact with the inner peripheral surface 70b. The coil protection portion 250 is inserted between the first circumferential holding portion 172 and the second circumferential holding portion 173 in the axial direction AD. The coil protection portion 250 is inserted between two shaft holding portions 174 adjacent in the circumferential direction CD. The coil protection portion 250 is in a state of being inserted inside the holding recess 175 and overlaps the inner surface of the holding recess 175 .

The coil protection portion 250 is in a state of being bridged between the first circumferential holding portion 172 and the second circumferential holding portion 173 in the axial direction AD. For example, the coil protection portion 250 overlaps the tip surfaces of the first peripheral holding portion 172 and the second peripheral holding portion 173 . Note that the coil protection portion 250 may protrude outward from the first circumferential holding portion 172 and the second circumferential holding portion 173 in the axial direction AD.

As shown in FIG. 49, the plurality of shaft holding portions 174 are arranged in alignment with the positions of the coil portions 215 in the circumferential direction CD. The number of shaft holding portions 174 arranged in the circumferential direction CD is the same as the number of coil portions 215 arranged in the circumferential direction CD. The shaft holding portion 174 and the coil portion 215 are arranged in the axial direction AD and face each other in the axial direction AD. The coil portion 215 is provided at a position where the coil axis Cc passes through the shaft holding portion 174 . Coil axis Cc is a straight imaginary line that passes through the center of coil portion 215 and extends in radial direction RD. For example, the coil portion 215 is arranged at a position where the coil axis Cc passes through the center of the shaft holding portion 174 in the circumferential direction CD. Further, the coil portion 215 is arranged at a position where the coil axis Cc passes through the center of the shaft holding portion 174 in the axial direction AD.

49, the lateral cross-sectional view of the motor housing 70 and the stator 200 is expanded so that the outer peripheral surface 70a extends linearly. Also, the motor housing 70 corresponds to the electric housing, and the shaft holding portion 174 corresponds to the shaft convex portion.

The coil protection part 250 preferably has high thermal conductivity and electrical insulation. However, if it is difficult to increase both the thermal conductivity and the electrical insulation in the coil protection portion 250, it is preferable to increase the thermal conductivity in preference to the electrical insulation. For example, the thermal conductivity of coil protector 250 is higher than that of bobbin 240 . Specifically, the thermal conductivity of coil protection portion 250 is higher than the thermal conductivity of bobbin 240 . On the other hand, the electrical insulation of coil protection portion 250 is lower than the electrical insulation of bobbin 240 . Specifically, the dielectric constant of coil protection portion 250 is higher than the dielectric constant of bobbin 240 .

Next, among the methods for manufacturing the motor device 60, a method for manufacturing the stator 200 will be described. In the process of manufacturing stator 200, an operator prepares coil unit 210 and motor housing 70 as a preparatory process. Then, the operator installs the coil unit 210 inside the motor housing 70 and mounts the motor housing 70 together with the coil unit 210 in a mold for molding. An operator molds the coil protector 250 inside the motor housing 70 by injection molding. In the motor device 60 in which the coil unit 210 and the motor housing 70 are thus integrated with the coil protection portion 250 by insert molding, the coil protection portion 250 is in close contact with both the coil portion 215 and the inner peripheral surface 70b. ing.

<Constituent group Cb>
As shown in FIG. 50, the motor housing 70 includes a housing base surface 176 and a housing rough surface 177 on the inner peripheral surface 70b. The housing rough surface 177 is rougher than the housing base surface 176 . The housing rough surface 177 is in a rough state, for example, by providing a large number of fine irregularities. The housing rough surface 177 is formed by roughening the motor housing 70 to form a rough surface. Surface roughening for forming the housing rough surface 177 includes mechanical processing and chemical processing.

The housing base surface 176 is provided outside the stator holding portion 171 in the axial direction AD. For example, the housing base surface 176 is provided outside the first peripheral holding portion 172 and the second peripheral holding portion 173 in the axial direction AD. The housing base surface 176 is annularly formed along the inner peripheral surface 70b.

The housing rough surface 177 is provided inside the housing base surface 176 including the outer surface of the stator holding portion 171 in the axial direction AD. The housing rough surface 177 is provided at least on the inner surface of the holding recess 175 . The housing rough surface 177 is provided on the outer surface of the stator holding portion 171 . For example, the housing rough surface 177 is provided on the outer surfaces of the first peripheral holding portion 172 , the second peripheral holding portion 173 and the shaft holding portion 174 . In FIG. 50, the housing rough surface 177 is hatched with dots.

In the inner peripheral surface 70 b , at least a portion on which the coil protection portion 250 is overlapped is a housing rough surface 177 . The housing rough surface 177 is a surface to which the coil protection portion 250 is more likely to adhere than the housing base surface 176 . Moreover, the housing rough surface 177 tends to have a larger surface area than the housing base surface 176 . Therefore, the contact area between the housing rough surface 177 and the coil protection portion 250 tends to increase.

<Constituent group Cc>
As shown in FIGS. 51 and 52 , in stator 200 , power lead wire 212 is led out from coil protection portion 250 . The grommet 255 is made of a resin material or the like and has electrical insulation. A grommet 255 protects the portion where the power lead wire 212 is led out from the coil protection portion 250 . Grommet 255 is included in motor device 60 . Grommet 255 covers power lead wire 212 while straddling a boundary between a portion of power lead wire 212 embedded inside coil protection portion 250 and a portion exposed from coil protection portion 250 . 51, illustration of the coil protection portion 250 is omitted.

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

The power lead wire 212 is drawn out from the coil protection portion 250 so as to extend in the axial direction AD along the inner peripheral surface 70b of the motor housing 70 . As shown in FIGS. 52 and 53, the motor housing 70 is provided with a pull-out groove portion 171a. The power lead wire 212 is led out from the coil protection part 250 through the lead groove part 171a. The drawing groove portion 171 a is provided in the stator holding portion 171 . The pull-out groove portion 171a is provided in the first peripheral holding portion 172, and penetrates the first peripheral holding portion 172 in the axial direction AD while being open radially inward.

As shown in FIGS. 51 and 52, the grommet 255 covers at least a portion of the power lead wire 212 passing through the lead groove portion 171a. The grommet 255 is inserted into the lead groove portion 171a together with the power lead wire 212 from the inside in the radial direction. The grommet 255 is in close contact with the inner surface of the lead-out groove portion 171a. The grommet 255 fills the gap between the inner surface of the lead groove portion 171 a and the power lead wire 212 . The grommet 255 is elastically deformable, for example, and is fitted into the pull-out groove portion 171a by being elastically deformed. The power lead wire 212 corresponds to the coil lead wire, and the grommet 255 corresponds to the lead wire protection portion.

Next, among methods for manufacturing stator 200, a method for manufacturing coil protection portion 250 will be described. In the process of manufacturing the coil protector 250, an operator prepares the coil unit 210, the motor housing 70, and the grommet 255 as a preparatory process. The worker then attaches the grommet 255 to the power lead wire 212 of the coil unit 210 . The operator performs the work of installing the coil unit 210 inside the motor housing 70 and the work of fitting the grommet 255 together with the power lead wire 212 into the lead groove portion 171a.

An operator mounts the coil unit 210 and the motor housing 70 with the grommet 255 on the mold, and molds the coil protector 250 . In this case, since the grommet 255 is fitted in the pull-out groove portion 171a, the grommet 255 prevents the molten resin from flowing out of the pull-out groove portion 171a.

<Constituent group Cd>
As shown in FIG. 54, core unit 230 has core 231 and bobbin 240 . The core unit 230 is permanently covered with the coil protection section 250 together with the coil 211 and is protected by the coil protection section 250 . Coil protector 250 is in close contact with at least a portion of bobbin 240 .

The bobbin 240 is made of a resin material or the like. The bobbin 240 is made of, for example, an epoxy thermosetting resin. The bobbin 240 is, for example, molded resin formed by molding. The bobbin 240 has electrical insulation. The bobbin 240 has thermal conductivity, and heat from the core 231 is easily conducted. Bobbin 240 has a greater thermal conductivity than, for example, air.

The bobbin 240 covers at least a portion of the core 231 and protects the core 231 . The bobbin 240 covers the core 231 so as to extend in a direction perpendicular to the axial direction AD. The bobbin 240 is formed in an annular shape as a whole. The bobbin 240 is in close contact with the outer surface of the core 231 . The bobbin 240 easily conducts heat from the coil 211 to the coil protection portion 250 .

The bobbin 240 preferably has high thermal conductivity and electrical insulation. However, if it is difficult to increase both the thermal conductivity and the electrical insulation of the bobbin 240, it is preferable to prioritize the electrical insulation over the thermal conductivity. For example, the electrical insulation of the bobbin 240 is higher than that of the coil protector 250 . Specifically, the dielectric constant of bobbin 240 is smaller than that of coil protection portion 250 . On the other hand, the thermal conductivity of bobbin 240 is lower than that of coil protection portion 250 . Specifically, the thermal conductivity of bobbin 240 is lower than the thermal conductivity of coil protection portion 250 .

<Constituent group Ce>
As shown in FIG. 55, the bobbin 240 has a bobbin body 241 and a bobbin flange 242 . The bobbin body portion 241 is formed in a columnar shape as a whole and extends in the axial direction AD. An outer peripheral surface 241a of the bobbin body 241 is formed in an annular shape extending in a direction orthogonal to the axial direction AD.

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

The bobbin flange 242 has a flange inner plate surface 243 , a flange outer plate surface 244 and a flange end surface 245 . Of the pair of plate surfaces of the bobbin flange 242 , the plate surface on the side of the bobbin body 241 is the flange inner plate surface 243 , and the plate surface on the side opposite to the bobbin body 241 is the flange outer plate surface 244 . In the pair of bobbin flanges 242, respective flange inner plate surfaces 243 face each other. The flange end surface 245 is the tip surface of the bobbin flange 242 and extends in a direction perpendicular to the axial direction AD. The flange end surface 245 is positioned outwardly away from the bobbin body 241 .

The outer surface of bobbin 240 includes bobbin base surface 246 and bobbin rough surface 247 . The bobbin rough surface 247 is rougher than the bobbin base surface 246 . The bobbin rough surface 247 is in a rough state, for example, by providing a large number of fine irregularities. The bobbin rough surface 247 is formed by roughening the bobbin 240 to form a rough surface. Surface roughening for forming the bobbin rough surface 247 includes mechanical processing and chemical processing. In FIG. 55, the bobbin rough surface 247 is hatched with dots.

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

The bobbin 240 has at least a bobbin rough surface 247 on which the coil protection portion 250 is superimposed. As shown in FIG. 56 , in the coil unit 210 , when the coil 211 is wound around the bobbin 240 , at least the flange outer plate surface 244 and the flange end surface 245 are exposed to the outside. In the motor device 60 , the coil protection portion 250 covers at least the flange end surface 245 while the coil unit 210 is covered with the coil protection portion 250 . That is, the coil protection portion 250 overlaps the flange end surface 245 . The coil protection portion 250 basically does not cover the flange skin surface 244 .

In the motor device 60 , since the flange end surface 245 is included in the bobbin rough surface 247 , the coil protection portion 250 is easily brought into close contact with the flange end surface 245 . Also, the flange end surface 245 , which is the bobbin rough surface 247 , tends to have a larger surface area than the bobbin base surface 246 . Therefore, the contact area between the flange end face 245 and the coil protection portion 250 tends to increase.

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

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

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

The core step surface 234 has a step base surface 234a and a step connection surface 234b. A plurality of staircase base surfaces 234a and staircase connection surfaces 234b are arranged in the radial direction RD. The staircase base surface 234a extends in a direction perpendicular to the circumferential direction CD. Of the two adjacent step base surfaces 234a in the radial direction RD, the radially inner step base surface 234a is arranged inside the radially outer step base surface 234a in the circumferential direction CD. The step connection surface 234b extends in a direction perpendicular to the radial direction RD. The staircase connection surface 234b connects two adjacent staircase base surfaces 234a in the radial direction RD.

The core 231 is made up of a plurality of core-forming plate members 236 . As shown in FIG. 60, the core forming plate member 236 is a thin plate member. The core forming plate member 236 is made of, for example, a soft magnetic material. The core 231 is formed by stacking a plurality of core forming plate members 236 . The core 231 includes a plurality of types of core forming plates 236 with different sizes and shapes. In the core 231, a plurality of types of core forming plate members 236 are used according to the core width. In the core 231, the plurality of core forming plate members 236 forming the stepped base surface 234a of one step are one type of core forming plate members 236 having the same size and shape. The core 231 includes at least as many types of core-forming plates 236 as there are stair base surfaces 234a.

In the core 231, since a plurality of core forming plate members 236 are laminated, eddy current is less likely to occur. Therefore, the eddy current loss generated in the core 231 can be reduced. Moreover, in the core unit 230 , the bobbin 240 is superimposed on at least the core step surface 234 . Since the outer surface of the core 231 includes the core step surface 234, the surface area tends to be large. In the core unit 230 , the contact area between the core 231 and the bobbin 240 tends to increase due to the core stepped surface 234 .

Among methods for manufacturing the motor device 60, a method for manufacturing the core 231 and the core unit 230 will be described. In the process of manufacturing the core 231, an operator prepares a plurality of types of core forming plate materials 236. As shown in FIG. Then, the worker creates the core 231 by stacking a plurality of core forming plate materials 236 of one kind to create a staircase base surface 234a for a plurality of staircases.

In the process of manufacturing the core unit 230, the worker prepares the core 231 as a preparatory process. Then, the operator mounts the core 231 on the mold and forms the bobbin 240 by molding. In the core unit 230 in which the core 231 is thus integrated with the bobbin 240 by insert molding, the bobbin 240 is in close contact with the core 231 . In the core 231 , the bobbin 240 is in close contact with the core stepped surface 234 .

For example, unlike the present embodiment, assume a configuration in which the core width of the core 231 continuously decreases radially inward. In this configuration, the outer surface of core 231 would include a tapered surface rather than core step surface 234 . Therefore, in order to form a tapered surface by laminating a plurality of core forming plate members 236, the number of types of core forming plate members 236 is very large. Regarding the manufacture of the core 231, there is a concern that the cost for manufacturing the core forming plate material 236 increases as the number of types of the core forming plate material 236 increases. On the other hand, in the present embodiment, the core width of the core 231 gradually decreases radially inward, so the types of core forming plate members 236 can be limited. Therefore, in manufacturing the core 231, the cost for manufacturing the core forming plate material 236 can be reduced.

<Constituent group Cg>
As shown in FIGS. 61, 62, 63 and 64, the bobbin 240 has a flange recess 243a. The flange recesses 243 a are provided on each of the pair of bobbin flanges 242 . The flange recess 243 a is a recess provided in the flange inner plate surface 243 . The flange recess 243a is provided on one side of the bobbin body 241 in the circumferential direction CD. The flange recess 243a is not provided on the other side of the bobbin body 241 in the circumferential direction CD. The flange recess 243a extends along the bobbin body 241 in the radial direction RD. Both ends of the flange recess 243a are open in the radial direction RD. The flange concave portion 243a is open toward the side opposite to the bobbin body portion 241 in the circumferential direction CD. The flange recesses 243a provided in each of the pair of bobbin flanges 242 face each other in the axial direction AD. Note that the flange inner plate surface 243 corresponds to the flange surface.

As shown in FIG. 65 , in coil unit 210 , flange recess 243 a is used to lead power lead wire 212 out of coil 211 . In the coil portion 215, a flange concave portion 243a is used to pull out the first extension line 216. As shown in FIG. In the coil portion 215, the coil wire 220 is drawn out through the flange concave portion 243a to form a first extension wire 216. As shown in FIG.

On the opposite side of the flange recess 243a via the bobbin body 241 in the circumferential direction CD, dead space is less likely to occur between the coil portion 215 and the flange inner plate surface 243 due to the absence of the flange recess 243a. there is Since dead space is less likely to occur between the pair of bobbin flanges 242 in this manner, the space factor of the coil 211 in the bobbin 240 can be increased. In the bobbin 240, the smaller the dead space generated between the pair of bobbin flanges 242 is, the higher the space factor of the coil 211 is.

<Constituent Group Da>
As shown in FIG. 66 , in the motor device unit 50 , the unit housing 51 has a motor housing 70 and an inverter housing 90 . The outer peripheral surface of unit housing 51 includes an outer peripheral surface 70 a of motor housing 70 and an outer peripheral surface 90 a of inverter housing 90 . Motor fins 72 and inverter fins 92 are provided on the outer peripheral surface of the unit housing 51 . Unit housing 51 accommodates stator 200 , rotor 300 and inverter 81 . In the motor device unit 50 , the heat of the motor 61 and the inverter 81 is easily released to the outside by the motor fins 72 and the inverter fins 92 .

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

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

As shown in FIGS. 66 and 67, in the motor housing 70, the coil protection portion 250 is superimposed on the inner peripheral surface 70b. The inner peripheral surface 70 b of the motor housing 70 is included in the inner peripheral surface of the unit housing 51 . The coil protection portion 250 overlaps the inner peripheral surface of the unit housing 51 . The coil protection portion 250 is in close contact with the inner peripheral surface of the unit housing 51 .

<Construction group Db>
As shown in FIGS. 68 and 69, in shaft 340, rim 344 of shaft flange 342 is formed in a plate shape as a whole. A pair of plate surfaces of the rim 344 face the radial direction RD. In the rim 344, the thickness direction is the radial direction RD. The rim 344 extends annularly in the circumferential direction CD and corresponds to an annular portion. A rim 344 forms the outer peripheral edge of shaft flange 342 . The rim 344 spans the first rotor 300a and the second rotor 300b in the axial direction AD.

As shown in FIG. 68, rim 344 is provided inside stator 200 . Rim 344 is spaced radially inwardly from stator 200 . The rim 344 partitions the inner space of the stator 200 in the radial direction RD. The inner space of stator 200 is a space existing radially inward of coil protection portion 250 . This inner space is sometimes referred to as an inner region. Rim 344 extends in axial direction AD along the inner peripheral surface of coil protection portion 250 . In the axial direction AD, the height dimension of the rim 344 and the height dimension of the coil protection portion 250 are substantially the same.

69, 70, 71 and 72, the shaft flange 342 has a flange vent 346. As shown in FIGS. A flange vent 346 is provided in the rim 344 and extends through the rim 344 in the radial direction RD. The flange vent 346 is spaced apart from both of the pair of rim tip portions 344a in the axial direction AD. For example, the flange vent 346 is provided at an intermediate position of the rim 344 in the axial direction AD.

A plurality of flange vent holes 346 are arranged in the circumferential direction CD. In the shaft flange 342, the flange vent holes 346 and the spokes 343 are arranged in the circumferential direction CD. A flange vent 346 is provided between two spokes 343 adjacent in the circumferential direction CD. Two spokes 343 that are adjacent to each other via the flange vent hole 346 in the circumferential direction CD are both located apart from the flange vent hole 346 .

In FIG. 68, flange vent holes 346 allow venting in the interior space of motor device 60 in radial direction RD. The flange vent 346 communicates a space radially inside the rim 344 with a space radially outside the rim 344 . In the inner space of coil protection portion 250 , the heat of stator 200 is easily released to the inside of rim 344 through flange ventilation hole 346 . In addition, the stator 200 is easily cooled by the air as a gas flowing through the flange ventilation holes 346 in the radial direction RD. Inside the motor housing 70 , air convection in the radial direction RD is likely to occur through the flange vent holes 346 .

<Constituent Group Dc>
As shown in FIGS. 73 and 74, rotor 300 has holder adjustment holes 326 . A holder adjustment hole 326 is provided in the magnet holder 320 . The holder adjustment hole 326 penetrates the rotor 300 in the axial direction AD by penetrating the magnet holder 320 in the axial direction AD. The holder adjustment hole 326 is provided radially inward of the magnet 310 . For example, the holder adjustment hole 326 is provided between the holder fixing hole 325 and the magnet fixture 335 in the radial direction RD. A plurality of holder adjustment holes 326 are arranged in the circumferential direction CD. The holder adjustment holes 326 are arranged in the same number as the magnet fixtures 335, for example.

In the rotor 300, the center of gravity may deviate from the motor axis Cm in the radial direction RD and the rotor 300 may be out of balance. In the rotor 300, weight members are attached to the magnet holders 320 so as to maintain balance. A weight member attached to the rotor 300 is inserted into one of the plurality of holder adjustment holes 326 according to the balance state of the rotor 300 . The weight member is fixed to the holder adjustment hole 326 by being fitted into the holder adjustment hole 326 or the like. The balance of the rotor 300 includes static balance when the rotor 300 is not rotating and rotational balance when the rotor 300 is rotating. Note that the holder adjustment hole 326 corresponds to the balance adjustment hole.

Note that part of the holder adjustment hole 326 is blocked by the rim 344 in the axial direction AD. The weight member is inserted into the holder adjustment hole 326 from the rotor second surface 302 side in the axial direction AD. The rim 344 blocks part of the holder adjustment hole 326 to prevent the weight member from falling out of the holder adjustment hole 326 toward the rotor first surface 301 .

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

The holder adjustment hole 326 allows ventilation in the axial direction AD in the internal space of the motor device 60 . The holder adjustment hole 326 communicates two spaces partitioned in the axial direction AD by the magnet holder 320 . Therefore, the heat of the stator 200 is easily released in the axial direction AD through the holder adjustment holes 326 . Moreover, the stator 200 is easily cooled by the air flowing through the holder adjustment hole 326 in the axial direction AD. Inside the motor housing 70 , air convection in the axial direction AD tends to occur through the holder adjustment hole 326 .

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

<Constituent group Dd>
As shown in FIG. 75, rear frame 370 has frame opening 373 . The frame opening 373 penetrates the rear frame 370 in the axial direction AD. The frame opening 373 is an opening that opens the rear frame 370 in the axial direction AD. The frame opening 373 is provided radially outward of the busbar unit 260 in the radial direction RD. A plurality of frame openings 373 are arranged in the circumferential direction CD.

A power lead wire 212 is inserted through the frame opening 373 in the axial direction AD. The power lead wire 212 is led out to the power bus bar 261 side through the frame opening 373 . A portion of the power lead-out line 212 led out from the frame opening 373 is electrically connected to the power bus bar 261 . At least one power lead wire 212 is inserted through the frame opening 373 .

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

As shown in FIGS. 75 and 76, the temperature sensor 431 is provided in the coil unit 210 of the motor 61, for example. A plurality of temperature sensors 431 are provided, for example. Temperature sensor 431 is attached to neutral point bus bar 290 . The neutral point busbar 290 has a busbar main body 291 and a sensor support portion 292 . Busbar main body 291 forms a main portion of neutral point busbar 290 . The busbar main body 291 is in a state of being stretched over the plurality of coil portions 215 in the neutral point unit 214 . The sensor support portion 292 supports the temperature sensor 431 . The sensor support portion 292 is, for example, a projecting portion projecting from the busbar main body 291 . The temperature sensor 431 is fixed to the sensor support portion 292 .

As shown in FIG. 75, the motor device 60 has a signal terminal block 440. As shown in FIG. The signal terminal block 440 is provided on the inverter device 80 side of the rear frame 370 and the resolver cover 424 in the axial direction AD. Signal terminal block 440 is attached to at least one of rear frame 370 and resolver cover 424 . The signal terminal block 440 is arranged in the resolver connector 423 in a direction orthogonal to the axial direction AD.

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

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

The signal terminal block 440 aggregates the signal wirings 426 and 436 and corresponds to a wiring aggregation section. Signal wires 426 and 436 are drawn into the signal terminal block 440 . The signal terminal block 440 has a plurality of terminal portions and a case accommodating these terminal portions. The signal wirings 426 and 436 drawn into the signal terminal block 440 are electrically connected to respective terminal portions.

As for the resolver 421 , the signal wiring 426 is in a state of being stretched between the resolver connector 423 and the signal terminal block 440 . The signal wiring 426 extends along the rear frame 370 and the resolver cover 424 on the inverter device 80 side from the rear frame 370 and the resolver cover 424 . The resolver 421 can detect the state of the motor device 60 by detecting the rotation angle of the motor 61 . The resolver 421 corresponds to the state detection section, and the signal wiring 426 corresponds to the detection wiring.

As for the temperature sensor 431 , the signal wiring 436 is in a state of being stretched between the temperature sensor 431 and the signal terminal block 440 . The signal wiring 436 penetrates the rear frame 370 and the resolver cover 424 in the axial direction AD by being inserted through the frame opening 373 . The temperature sensor 431 can detect the state of the motor device 60 by detecting the temperature of the motor 61 . The temperature sensor 431 corresponds to the state detection section, and the signal wiring 436 corresponds to the detection wiring.

A plurality of inverter wirings of the inverter device 80 are drawn into the signal terminal block 440 . The plurality of inverter wires includes inverter wires that together with signal wires 426 and 436 form signal lines 425 and 435 . The inverter wiring is electrically connected to the signal wirings 426 and 436 via the terminal portion in the signal terminal block 440 . The inverter wiring connected to the signal wirings 426 and 436 is electrically connected to the control device 54 in the inverter device 80, for example.

<Constituent group De>
In FIG. 77, dust cover 380 covers all frame openings 373 . The dustproof cover 380 is in a state of spanning over the plurality of frame openings 373 in the circumferential direction CD. The dustproof cover 380 closes the frame opening 373 from the inverter device 80 side in the axial direction AD. The dustproof cover 380 restricts foreign matter from passing through the frame opening 373 in the axial direction AD.

The dustproof cover 380 covers the power lead-out line 212 and the busbar unit 260 from the inverter device 80 side. The dust-proof cover 380 has electrical insulation properties, and suppresses deterioration in insulation reliability between the power lead-out line 212 and the power bus bar 261 and the inverter device 80 . The dustproof cover 380 is in a state of being inserted between the busbar unit 260 and the busbar terminal 263 in the axial direction AD.

A signal wiring 436 extending from the temperature sensor 431 penetrates the dustproof cover 380 and is led out to the inverter device 80 side. The dustproof cover 380 has wiring holes 381 . The wiring hole 381 penetrates the dustproof cover 380 in the axial direction AD. The signal wiring 436 passes through the dustproof cover 380 by passing through the wiring hole 381 . The wiring hole 381 is sized and shaped to be closed by the signal wiring 436 . In the state where the signal wiring 436 is passed through the wiring hole 381 , it is difficult for foreign matter to pass through the wiring hole 381 . The wiring hole 381 is provided at a position closer to the outer peripheral edge than the inner peripheral edge of the dustproof cover 380 . A plurality of wiring holes 381 are provided in the dustproof cover 380 . One signal wiring 436 is passed through one wiring hole 381 .

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

<Constituent group Df>
As shown in FIGS. 78 and 79, motor housing 70 has a connecting flange 74 . The connecting flange 74 extends radially outward from the housing body 71 and corresponds to an electrical machine flange. A plurality of connecting flanges 74 are arranged in the circumferential direction CD.

The connecting flange 74 has a flange hole 74a. The flange hole 74a extends in the axial direction AD. The flange hole 74a penetrates the connecting flange 74 in the axial direction AD. The flange hole 74a is a hole for fixing the motor housing 70 to the inverter housing 90, and corresponds to an electric machine fixing hole. Of the housing main body 71 and the connecting flange 74, only the connecting flange 74 is provided with the flange hole 74a. The connecting flange 74 is connected to a connecting flange 94 of the inverter housing 90 by screwing the housing fixture 52 into the flange hole 74a. The inverter housing 90 is a fixed target to which the motor housing 70 is fixed, and corresponds to a housing fixed target. The connecting flanges 74 are sometimes referred to as ears.

As described above, in the motor housing 70, of the housing main body 71 and the connecting flange 74, only the connecting flange 74 is provided with the flange hole 74a. Therefore, the rigidity of the housing body 71 is not lowered by the flange hole 74a. In the motor housing 70, a flange portion where the housing main body 71 is provided with the connecting flange 74 and a non-flange portion where the housing main body 71 is not provided with the connecting flange 74 are alternately arranged in the circumferential direction CD. Even if the flange hole 74a is formed in the connecting flange 74, the thickness dimension of the flange portion is larger than the thickness dimension of the non-flange portion in the radial direction RD. The rigidity of the flange portion is higher than that of the non-flange portion by the thickness dimension of the connecting flange 74 .

For example, unlike the present embodiment, a configuration in which a hole for fixing the housing fixture 52 is provided in the housing main body 71 is assumed. In this configuration, the thickness of the housing body 71 is reduced by the amount of the hole formed for the housing fixture 52 . Therefore, there is concern that the rigidity of the housing main body 71 will be reduced by the holes for the housing fixtures 52 .

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

The fixed flange 178 has a flange hole 178a. The flange hole 178a extends in the axial direction AD. The flange hole 178a penetrates the fixed flange 178 in the axial direction AD. The flange hole 178a is a hole for fixing the motor housing 70 to the drive frame 390, and corresponds to an electric machine fixing hole. Of the housing main body 71 and the fixed flange 178, only the fixed flange 178 is provided with the flange hole 178a. The fixed flange 178 is fixed to the drive frame 390 by screwing the frame fixture 405 into the flange hole 178a. The drive frame 390 is a fixed target to which the motor housing 70 is fixed, and corresponds to a housing fixed target. Fixed flanges 178 are sometimes referred to as ears. 80, illustration of the drive frame 390 is omitted.

As described above, in the motor housing 70, only the fixed flange 178 of the housing body 71 and the fixed flange 178 is provided with the flange hole 178a. Therefore, the rigidity of the housing body 71 is not lowered by the flange hole 178a. In the motor housing 70, the flange portion where the housing body 71 is provided with the fixed flange 178 and the non-flange portion where the housing body 71 is not provided with the fixed flange 178 are alternately arranged in the circumferential direction CD. Even if the fixed flange 178 has the flange hole 178a, the thickness dimension of the flange portion is larger than the thickness dimension of the non-flange portion in the radial direction RD. The rigidity of the flange portion is higher than that of the non-flange portion by the thickness dimension of the fixed flange 178 .

For example, unlike the present embodiment, a configuration in which a hole for fixing the frame fixture 405 is provided in the housing body 71 is assumed. This configuration reduces the thickness of the housing body 71 by the amount of holes formed for the frame fasteners 405 . For this reason, there is concern that the rigidity of the housing body 71 will be reduced by the holes for the frame fasteners 405 .

<Constituent group Dg>
As shown in FIGS. 81, 82, and 83, the drive frame 390 covers the motor 61 from the opposite side of the inverter device 80 in the axial direction AD. The drive frame 390 is in a state of closing the opening of the motor housing 70 from the second rotor 300b side. The motor housing 70 corresponds to the electric housing, and the drive frame 390 corresponds to the electric cover.

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

The fixed flange 392 extends radially outward from the frame body 391 . A plurality of fixed flanges 392 are arranged in the circumferential direction CD. For example, eight fixed flanges 392 are arranged in the circumferential direction CD. The fixed flange 392 is aligned with the fixed flange 178 of the motor housing 70 in the axial direction AD.

The fixed flange 392 has a first fixed hole 392a and a second fixed hole 392b. The first fixing hole 392a and the second fixing hole 392b extend in the axial direction AD. The first fixing hole 392a and the second fixing hole 392b pass through the fixing flange 392 in the axial direction AD. The first fixing hole 392 a and the second fixing hole 392 b are provided only in the fixed flange 392 of the frame main body 391 and the fixed flange 392 . The first fixing hole 392 a and the second fixing hole 392 b are arranged in the radial direction RD in the fixing flange 392 . The first fixing hole 392a is provided radially inward of the second fixing hole 392b. The first fixing hole 392a is located radially inwardly spaced from the second fixing hole 392b.

The first fixing hole 392 a is a hole for fixing the drive frame 390 to the motor housing 70 . The fixed flange 392 is fixed to the fixed flange 178 of the motor housing 70 by screwing the frame fixture 405 into the first fixing hole 392a. Fixed flanges 392 are sometimes referred to as ears.

The second fixing hole 392 b is a hole for fixing the drive frame 390 to the speed reducer 53 . The fixed flange 392 is fixed to the reduction gear 53 by screwing the reduction gear fixture 53a into the second fixing hole 392b. The speed reducer 53 is a fixed target to which the drive frame 390 is fixed, and corresponds to a cover fixed target.

As described above, in the drive frame 390, only the fixed flange 392 of the frame body 391 and the fixed flange 392 is provided with the first fixing hole 392a and the second fixing hole 392b. Therefore, the rigidity of the frame main body 391 is not lowered by the first fixing holes 392a and the second fixing holes 392b.

For example, unlike the present embodiment, a configuration in which holes for fixing the frame fixture 405 and the reduction gear fixture 53a are provided in the frame main body 391 is assumed. In this configuration, there is a concern that the rigidity of the frame main body 391 is lowered by the amount of holes formed for the frame fixture 405 and the speed reducer fixture 53a.

Drive frame 390 has a perimeter frame portion 393 and a perimeter flange 394 . The outer frame portion 393 spans two fixed flanges 392 adjacent to each other in the circumferential direction CD and connects the fixed flanges 392 . The outer peripheral frame portion 393 extends in the circumferential direction CD along the outer peripheral edge of the frame main body 391 . A plurality of outer peripheral frame portions 393 are arranged in the circumferential direction CD. The outer frame portion 393 is located radially outwardly away from the frame main body 391 . The outer frame portion 393 is located at a position spaced radially inward from the distal end portion of the fixed flange 392 . The outer frame portion 393 extends in the circumferential direction CD from a portion of the fixing flange 392 between the first fixing hole 392a and the second fixing hole 392b.

In the drive frame 390 , a fixed flange 392 is reinforced by an outer peripheral frame portion 393 . Therefore, even if the rigidity of the fixed flange 392 is reduced due to the formation of the two holes, the first fixed hole 392a and the second fixed hole 392b, the rigidity of the fixed flange 392 is maintained at the outer circumference. It is in a state of being supplemented by the frame portion 393 .

The outer peripheral flange 394 extends radially outward from the outer peripheral frame portion 393 . The outer peripheral flange 394 is located apart from the fixed flange 392 in the circumferential direction CD. A plurality of outer peripheral flanges 394 are arranged in the circumferential direction CD. The outer peripheral flange 394 is fixed to the unit duct 100 (see FIG. 2). A hole for fixing the unit duct 100 is provided in the outer peripheral flange 394 . The unit duct 100 is fixed to the outer peripheral flange 394 by screwing fasteners such as bolts into the holes.

<Construction group A>
According to the present embodiment described so far, the neutral point busbar 290 is provided at a position spaced apart from the busbar protection section 270 that has electrical insulation and protects the power busbar 261 . In this configuration, the neutral point bus bar 290 and the power bus bar 261 do not come into contact with each other, and the neutral point bus bar 290 and the bus bar protection unit 270 do not even come into contact with each other. Therefore, the neutral point bus bar 290 and the bus bar protection unit 270 can be separated from each other to suppress the deterioration of the insulation reliability of the electrical insulation state between the neutral point bus bar 290 and the power bus bar 261 . Therefore, since the neutral point bus bar 290 and the bus bar protection portion 270 are separated from each other, the electrical insulation reliability of the motor device 60 can be improved.

According to this embodiment, the power busbar 261 is provided in one of the stator-side space S1 and the inverter-side space S2 aligned in the axial direction AD, and the neutral point busbar 290 is provided in the other. Specifically, a power busbar 261 is provided in the inverter-side space S2, and a neutral point busbar 290 is provided in the stator-side space S1. Moreover, the stator-side space S1 and the inverter-side space S2 are partitioned by the rear frame 370 . In this configuration, rear frame 370 restricts contact between neutral point bus bar 290 and power bus bar 261 . In this way, the rear frame 370 can prevent the deterioration of the insulation reliability with respect to the electrically insulated state between the neutral point bus bar 290 and the power bus bar 261 . Therefore, the electrical insulation reliability of the motor device 60 can be enhanced by the rear frame 370 .

According to this embodiment, the neutral point busbar 290 and the busbar protection portion 270 are provided at positions spaced apart in the axial direction AD. In this configuration, the distance between the neutral point busbar 290 and the busbar protection portion 270 can be maximized. Therefore, in order to improve the insulation reliability between the neutral point bus bar 290 and the power bus bar 261, it is possible to prevent the distance between the neutral point bus bar 290 and the bus bar protection unit 270 from becoming insufficient.

According to this embodiment, the motor device 60 is a rotating electric machine that corresponds to both the axial gap type and the double rotor type. That is, the first rotor 300a and the second rotor 300b are arranged along the motor axis Cm with the stator 200 interposed therebetween. In this configuration, the size of the motor device 60 can be reduced by the axial gap type, and the motor output can be increased by the double rotor type. Furthermore, in this configuration, the Halbach arrangement is used for the arrangement of the magnets 310 in each of the first rotor 300a and the second rotor 300b. Therefore, it is possible to easily omit the back yoke in the motor device 60 . Also, the coil 211 is formed by winding a coil wire 220 having a plurality of wires 223 . Therefore, the copper loss of the coil wire 220 generated in the coil 211 can be reduced.

According to this embodiment, the number of turns of two coil portions 215 adjacent in the circumferential direction CD is different. With this configuration, it is possible to facilitate pulling out the coil wire 220 in the two coil portions 215 in opposite directions in the radial direction RD. Therefore, in the coil 211, one of the power lead wire 212 and the neutral lead wire 213 can be easily drawn radially outward and the other can be drawn radially inward. Therefore, it is possible to improve the insulation reliability with respect to the electrical insulation state between the power lead wire 212 and the neutral lead wire 213 .

According to this embodiment, the connecting portion between the power bus bar 261 and the relay terminal 280 is supported by the terminal base 285 . In this configuration, even if power bus bar 261 vibrates relative to relay terminal 280 , the stress caused by the vibration is easily suppressed by terminal base 285 . Therefore, the relay terminal 280 and the power bus bar 261 forming the output line 143 can be improved in vibration resistance. Therefore, even if the motor device 60 vibrates relative to the inverter device 80, it is possible to prevent the output line 143 formed by the relay terminal 280 and the power bus bar 261 from becoming abnormal.

For example, unlike the present embodiment, in a configuration in which the power bus bar 261 is directly connected to the inverter device 80 side without passing through the relay terminal 280, the power bus bar 261 is bridged between the inverter device 80 and the motor device 60. It has become. Therefore, when the motor device 60 vibrates relative to the inverter device 80 , there is a concern that stress will concentrate on the power bus bar 261 and cause an abnormality in the power bus bar 261 . That is, there is concern that an abnormality may occur in the output line 143 formed by the power bus bar 261 .

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

According to this embodiment, the rear frame 370 has the busbar support portion 371 and the bearing support portion 372 . In this configuration, one member, the rear frame 370 , can support two devices, the power bus bar 261 and the first bearing 360 . Therefore, the number of parts constituting the motor device 60 can be reduced.

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

According to this embodiment, the resolver 421 is provided on the side opposite to the neutral point bus bar 290 with the rear frame 370 interposed in the axial direction AD. With this configuration, a sufficient distance can be secured between the resolver 421 and the neutral point bus bar 290 . Therefore, even if an electromagnetic wave is generated by current flowing through the neutral point bus bar 290 or the like, the resolver 421 is less likely to be affected by the electromagnetic wave. For example, noise is less likely to occur in the detection signal of the resolver 421 when the neutral point bus bar 290 is energized.

<Construction group B>
According to this embodiment, in the rotor 300, the pair of inner magnets 312a and 312b adjacent in the circumferential direction CD are oriented obliquely with respect to the motor axis Cm so as to face the stator 200 side in the axial direction AD. there is A pair of circumferential magnets 311a and 311b adjacent to each other via a pair of inner magnets 312a and 312b in the circumferential direction CD are oriented so as to face each other in the circumferential direction CD. In this configuration, the magnetic flux generated by the pair of peripheral magnets 311a, 311b and the pair of inner magnets 312a, 312b concentrates on the stator 200 side, and the magnetic field on the stator 200 side tends to become strong. Therefore, the energy efficiency of motor device 60 can be enhanced.

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

According to this embodiment, in the rotor 300, the pair of outer shaft magnets 313a and 313b adjacent in the circumferential direction CD are provided on opposite sides via the first circumferential magnet 311a or the second circumferential magnet 311b. The pair of outer shaft magnets 313a and 313b are oriented obliquely with respect to the motor axis Cm so as to face the opposite side of the stator 200 in the axial direction AD and the opposite sides of each other in the circumferential direction CD. ing. In this configuration, the magnetic flux is diffused on the side opposite to the stator 200 in the axial direction AD, so that the magnetic field on the stator 200 side tends to be strong. Therefore, the energy efficiency of the motor device 60 can be further improved.

According to this embodiment, the first rotor 300a and the second rotor 300b are arranged such that the pair of inner magnets 312a and 312b on one side and the pair of outer magnets 313a and 313b on the other side are arranged in the axial direction AD. , are provided point-symmetrically to each other. In this configuration, the magnetic flux passing through the stator 200 in the axial direction AD tends to concentrate toward the inner boundary portion BI and the outer boundary portion BO in the circumferential direction CD. Therefore, the magnetic field on the stator 200 side can be strengthened.

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

According to this embodiment, the plurality of magnet units 316 arranged in the circumferential direction CD on the rotor 300 include the inclined magnet units 317 and the parallel magnet units 318 . In this configuration, in the manufacturing process of the rotor 300, the operator inserts the parallel magnet unit 318 as the last magnet unit 316 to be arranged in the magnet holder 320 between the two inclined magnet units 317 adjacent in the circumferential direction CD. can let Therefore, all magnet units 316 can be properly fixed to the magnet holder 320 .

According to this embodiment, the rotor 300 is provided on the side opposite to the magnet 310 via the rim tip portion 344a as a fulcrum in the radial direction RD so that the bending stress F2 is generated in the rotor 300 against the attractive force F1 to the magnet 310. A pressing force F3 is applied to 300 . In this configuration, the holder fixture 350 can prevent the rotor 300 from warping due to the vicinity of the magnet 310 approaching the stator 200 . Therefore, it is possible to prevent the deformation of the rotor 300 from causing a problem such as a decrease in the efficiency of the motor 61 .

According to this embodiment, the portion of the rotor 300 to which the holder fixture 350 is fixed and the portion of the shaft flange 342 to which the holder fixture 350 is fixed are separated in the axial direction AD. Therefore, even if the pressing force F3 is insufficient with respect to the suction force F1, the lack of the pressing force F3 can be resolved by increasing the pressing force F3 using the holder fixture 350 .

According to this embodiment, the holder fixing hole 325 into which the first holder fixture 350a is inserted in the first rotor 300a and the holder fixing hole 325 into which the second holder fixture 350b is inserted in the second rotor 300b are It exists in the position spaced apart in the circumferential direction CD. With this configuration, it is not necessary to insert both the first holder fixture 350a and the second holder fixture 350b into one hole in the shaft flange 342 from opposite sides in the axial direction AD. Therefore, it is not necessary to make the shaft flange 342 thick enough to insert both the first holder fixture 350a and the second holder fixture 350b into one hole. Therefore, the thickness and weight of the shaft flange 342 can be reduced.

<Constituent group C>
According to this embodiment, in the motor housing 70, the coil protection portion 250 is provided so as to overlap the inner peripheral surface 70b. With this configuration, the heat of the coil 211 is easily transferred to the motor housing 70 via the coil protection portion 250 . Moreover, motor fins 72 are provided on the outer peripheral surface 70 a of the motor housing 70 . Therefore, the heat transmitted from the coil protection portion 250 to the motor housing 70 is easily released to the outside by the motor fins 72 . Therefore, the heat dissipation effect of the motor device 60 can be enhanced.

According to the present embodiment, the coil protection portion 250 enters between the plurality of stator holding portions 171 from the inside in the radial direction. In this configuration, the stator holding portion 171 can increase the contact area between the coil protection portion 250 and the inner peripheral surface 70b. Therefore, heat is easily conducted from the coil protection portion 250 to the stator holding portion 171, and as a result, the heat dissipation effect of the motor housing 70 can be enhanced.

According to this embodiment, the coil portion 215 and the shaft holding portion 174 face each other in the radial direction RD. In this configuration, the distance between the coil portion 215 and the motor housing 70 in the radial direction RD can be reduced by the shaft holding portion 174 . That is, the thickness dimension of the coil protection portion 250 that exists between the shaft holding portion 174 in the radial direction RD can be reduced. Therefore, the heat transmitted from the coil portion 215 to the motor housing 70 is less likely to remain in the coil protection portion 250 . Therefore, it is possible to prevent the heat dissipation effect of the motor housing 70 from being reduced by the coil protection portion 250 .

According to this embodiment, the coil protector 250 overlaps at least the housing rough surface 177 . In this configuration, since the coil protection portion 250 is likely to come into close contact with the housing rough surface 177 , heat is easily transferred from the coil protection portion 250 to the motor housing 70 . Further, in this configuration, the contact area between the coil protection portion 250 and the housing rough surface 177 tends to be large, so that heat is easily transferred from the coil protection portion 250 to the motor housing 70 . Therefore, the heat dissipation effect of the motor housing 70 can be enhanced by the housing rough surface 177 .

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

According to this embodiment, since the bobbin 240 has electrical insulation, the electrical insulation state with respect to the coil 211 can be optimized by the bobbin 240 . Therefore, the occurrence of partial discharge in the coil 211 can be suppressed. Moreover, since the heat of the core 231 is released to the coil protection portion 250 via the bobbin 240, the heat dissipation effect of the core unit 230 can be enhanced.

According to this embodiment, the coil protector 250 overlaps at least the bobbin rough surface 247 . In this configuration, the coil protection portion 250 is easily brought into close contact with the bobbin rough surface 247 , so heat is easily transferred from the bobbin 240 to the coil protection portion 250 . Moreover, in this configuration, the contact area between the coil protection portion 250 and the bobbin rough surface 247 tends to be large, so heat is easily transferred from the bobbin 240 to the coil protection portion 250 . Therefore, the heat dissipation effect of the motor device 60 can be enhanced by the bobbin rough surface 247 .

According to the present embodiment, the core width of the core 231 is gradually reduced radially inward. In this configuration, the surface area of the core 231 is likely to be increased, and the core 231 is likely to be in close contact with the bobbin 240, compared to, for example, a configuration in which the core width is continuously reduced. Therefore, the heat of the core 231 is easily transferred to the bobbin 240 . Moreover, when the core 231 is manufactured by laminating a plurality of core forming plate materials 236, the types of the core forming plate materials 236 can be restricted according to the number of stages in which the core width is reduced. Therefore, it is possible to suppress an increase in cost for manufacturing the core forming plate material 236 .

According to this embodiment, the flange inner plate surface 243 of the bobbin 240 is provided with a flange recessed portion 243 a that is recessed for drawing out the power lead wire 212 from the coil 211 . In this configuration, a dead space is less likely to occur between the flange inner plate surface 243 and the coil 211 on the opposite side of the flange recessed portion 243a via the bobbin body portion 241 in the circumferential direction CD. Therefore, the space factor of the coil 211 in the bobbin 240 can be increased.

<Constituent group D>
According to this embodiment, the inverter 81 and the rotor 300 and stator 200 arranged in the axial direction AD are accommodated in the unit housing 51 . With this configuration, the motor device unit 50 can be miniaturized while the motor device 60 is thinned. Moreover, the motor fins 72 and the inverter fins 92 are provided on the outer peripheral surface of the unit housing 51 . Therefore, the heat dissipation effect of the motor device unit 50 can be enhanced by the motor fins 72 and the inverter fins 92 . Therefore, both miniaturization of the motor device unit 50 and improvement of the heat dissipation effect can be achieved.

According to this embodiment, the coil protection portion 250 is superimposed on the inner peripheral surface of the unit housing 51 . With this configuration, the heat of the coil 211 is easily transferred to the unit housing 51 through the coil protection portion 250 . Moreover, the motor fins 72 and the inverter fins 92 are provided on the outer peripheral surface of the unit housing 51 . Therefore, the heat transmitted from the coil protection portion 250 to the unit housing 51 is easily released to the outside by the motor fins 72 and the inverter fins 92 . Therefore, the heat dissipation effect of the motor device unit 50 can be enhanced.

According to this embodiment, the stator 200 and the rotor 300 are aligned in the axial direction AD, so that the motor housing 70 is thinned, and in the unit housing 51, the motor housing 70 and the inverter housing 90 are aligned in the axial direction AD. are lined up. Therefore, it is possible to prevent the motor device unit 50 from increasing in size in the axial direction AD by reducing the thickness of the motor housing 70 .

According to this embodiment, flange vent holes 346 provided in the shaft flange 342 penetrate the rim 344 in the radial direction RD to allow ventilation in the radial direction RD. With this configuration, the heat of the stator 200 is easily released in the radial direction RD through the flange vent holes 346 . Therefore, the heat dissipation effect of the motor device 60 can be enhanced by the flange vent holes 346 .

According to this embodiment, the holder adjustment hole 326 for adjusting the balance of the rotor 300 passes through the rotor 300 in the axial direction AD and allows ventilation in the axial direction AD. With this configuration, the heat of the stator 200 is easily released in the axial direction AD through the holder adjustment holes 326 . Therefore, the holder adjustment hole 326 for adjusting the balance of the rotor 300 can be used to enhance the heat dissipation effect of the motor device 60 .

According to this embodiment, the signal wiring 426 extending from the resolver 421 and the signal wiring 436 extending from the temperature sensor 431 are integrated into the signal terminal block 440 . In this configuration, the inverter wiring of the inverter device 80 can be electrically connected to both the resolver 421 and the temperature sensor 431 by leading to the signal terminal block 440 . Therefore, it is possible to reduce a worker's workload when connecting the signal wirings of motor device 60 and the signal wirings of inverter device 80 at the time of manufacturing motor device 60 .

According to this embodiment, a dust cover 380 covers the frame opening 373 . Therefore, the power lead-out line 212 can be pulled out from the frame opening 373 and the dust cover 380 can prevent foreign matter from passing through the frame opening 373 .

According to this embodiment, in the motor housing 70 , the connecting flange 74 projecting from the housing body 71 is provided with the flange hole 74 a. Therefore, it is possible to prevent the rigidity of the housing body 71 from being lowered by the flange hole 74a. A fixed flange 178 projecting from the housing body 71 is provided with a flange hole 178a. Therefore, it is possible to prevent the rigidity of the housing body 71 from being lowered by the flange hole 178a.

According to this embodiment, in the drive frame 390, the first fixing holes 392a and the second fixing holes 392b are arranged in the radial direction RD. In this configuration, the stress applied from the motor housing 70 to the first fixing hole 392a and the stress applied from the speed reducer 53 to the second fixing hole 392b tend to cancel each other out. Therefore, it is possible to suppress the occurrence of abnormalities such as deformation of the drive frame 390 due to the stress from the motor housing 70 and the stress from the speed reducer 53 .

<Second embodiment>
In the second embodiment, motor device 60 has only one rotor 300 . That is, the motor device 60 is a single-rotor type rotary electric machine. For example, one rotor 300 is provided between the stator 200 and the inverter device 80 in the axial direction AD. Note that one rotor 300 may be provided on the opposite side of the inverter device 80 via the stator 200 in the axial direction AD.

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

<Third Embodiment>
<Constituent group P>
In the first embodiment described above, the power busbar 261 is fixed to the rear frame 370 . On the other hand, in the third embodiment, the energization bus bar is fixed to the outer peripheral wall of the electric machine. Configurations, actions, and effects that are not specifically described in the third embodiment are the same as those in the first embodiment. In the third embodiment, the points different from the first embodiment will be mainly described.

As shown in FIG. 84, the motor device 60 has a motor case 550. As shown in FIG. Motor case 550 forms the outer surface of motor device 60 . Motor case 550 houses at least part of motor 61 . Motor case 550 houses stator 200 , rotors 300 a and 300 b , and at least part of shaft 340 . Motor case 550 corresponds to an electric machine case.

The motor case 550 has a motor space 550a. A motor space 550 a is an internal space of the motor case 550 . In motor case 550, stator 200 and rotors 300a and 300b are accommodated in motor space 550a. The motor space 550a corresponds to an accommodation space.

The motor case 550 has a motor outer peripheral wall 551 , a first opposing wall 552 and a second opposing wall 553 . The motor outer peripheral wall 551 is formed in a tubular shape. The motor outer peripheral wall 551 extends annularly in the circumferential direction CD. The motor outer peripheral wall 551 extends in the axial direction AD. The motor outer peripheral wall 551 has a pair of ends aligned in the axial direction AD. The motor outer peripheral wall 551 forms a motor space 550a. The motor space 550a is the inner space of the motor outer peripheral wall 551 . In motor case 550 , stator 200 and rotors 300 a and 300 b are accommodated inside motor outer peripheral wall 551 . The motor outer peripheral wall 551 corresponds to the electric machine outer peripheral wall.

The motor outer wall 551 has a motor outer wall surface 551a and a motor inner wall surface 551b. The motor outer wall surface 551a and the motor inner wall surface 551b extend in the axial direction AD so as to span a pair of end portions of the motor outer peripheral wall 551 that are aligned in the axial direction AD. The motor outer wall surface 551a is the outer peripheral surface of the motor outer peripheral wall 551 and faces radially outward. A motor fin 72 is provided on the motor outer wall surface 551a. The motor fins 72 promote the release of heat in the motor space 550a to the outside. The motor fins 72 correspond to a heat dissipation promoting portion. The motor inner wall surface 551b is the inner peripheral surface of the motor outer peripheral wall 551 and faces radially inward. The motor inner wall surface 551b corresponds to the inner wall surface.

The first opposing wall 552 and the second opposing wall 553 extend in a direction perpendicular to the axial direction AD. The first opposing wall 552 and the second opposing wall 553 are arranged in the axial direction AD via the motor space 550a. The first opposing wall 552 and the second opposing wall 553 extend radially inward from the motor inner wall surface 551b. The first opposing wall 552 is provided on the side opposite to the stator 200 with respect to the first rotor 300a. The first opposing wall 552 covers the motor space 550a from the first rotor 300a side in the axial direction AD. The first opposing wall 552 corresponds to the electric machine cover. The second opposing wall 553 is provided on the side opposite to the stator 200 via the second rotor 300b. The second opposing wall 553 covers the motor space 550a from the second rotor 300b side in the axial direction AD.

Motor case 550 has motor housing 70 , rear frame 370 and drive frame 390 . Motor outer wall surface 551a includes motor outer surface 70a, rear outer surface 370a, and drive outer surface 390a. The motor outer peripheral surface 70 a is the outer peripheral surface of the motor housing 70 . The rear outer peripheral surface 370 a is the outer peripheral surface of the rear frame 370 . The drive outer peripheral surface 390 a is the outer peripheral surface of the drive frame 390 .

The rear frame 370 has a rear base portion 375 and a rear outer peripheral portion 376 . The rear base portion 375 is a portion of the rear frame 370 located radially inward of the housing body 71 . The rear outer peripheral portion 376 is a portion of the rear frame 370 that overlaps the housing body 71 in the axial direction AD. The rear outer peripheral portion 376 forms a rear outer peripheral surface 370a.

The motor outer wall 551 includes the housing body 71 , part of the rear frame 370 and part of the drive frame 390 . In rear frame 370 , rear outer peripheral portion 376 is included in motor outer peripheral wall 551 . In the drive frame 390, the portion forming the drive outer peripheral surface 390a is included in the motor outer peripheral wall 551. As shown in FIG. The first opposing wall 552 has a portion of the rear frame 370 . A rear base portion 375 is included in the first opposing wall 552 of the rear frame 370 . The second opposing wall 553 has a portion of the drive frame 390 . In the drive frame 390 , the central portion is included in the second opposing wall 553 .

A first bearing 360 is fixed to a rear base portion 375 of the rear frame 370 . Therefore, the first opposing wall 552 supports the first bearing 360 . The first bearing 360 rotatably supports the rotors 300a and 300b via the shaft 340. As shown in FIG. The first bearing 360 corresponds to a bearing portion. The first opposing wall 552 corresponds to a bearing support.

In this embodiment, the busbar unit 260 of the first embodiment is fixed to the motor outer peripheral wall 551 . In this embodiment, the busbar unit 260 fixed to the motor outer peripheral wall 551 is called a wall busbar unit 560 . The wall busbar unit 560 basically has the same configuration as the busbar unit 260 of the first embodiment. For example, the wall busbar unit 560 extends annularly in the circumferential direction CD.

The wall busbar unit 560 has a power busbar 261 and a busbar protector 270 . In this embodiment, the power busbar 261 of the wall busbar unit 560 is referred to as the wall power busbar 565 , and the busbar protection section 270 of the wall busbar unit 560 is referred to as the wall busbar protection section 570 . The wall power busbar 565 basically has the same configuration as the power busbar 261 of the first embodiment. For example, the wall power bus bar 565 is energized and connected to the coil 211 in each of the multiple phases. The wall power bus bar 565 extends annularly in the circumferential direction CD. A plurality of wall power busbars 565 are included in the wall busbar unit 560 . For example, the multi-phase wall power bus bar 565 includes wall power bus bars 565 of U-phase, V-phase, and W-phase.

The wall busbar protection portion 570 basically has the same configuration as the busbar protection portion 270 of the first embodiment. For example, the wall busbar protection portion 570 has electrical insulation. The wall busbar protection part 570 protects the plurality of wall power busbars 565 by covering the plurality of wall power busbars 565 . The wall busbar protection portion 570 extends annularly in the circumferential direction CD.

The wall busbar unit 560 is fixed to the motor inner wall surface 551b in the motor space 550a. The wall busbar unit 560 extends in the circumferential direction CD along the motor inner wall surface 551b. The wall busbar unit 560 is laid on the inner wall surface 551b of the motor. The wall busbar unit 560 is provided between the first opposing wall 552 and the first rotor 300a in the axial direction AD. The wall busbar unit 560 is provided at a position away from each of the first rotor 300a, the stator 200 and the coil 211 in the axial direction AD. Moreover, the wall busbar unit 560 is provided at a position away from the first opposing wall 552 in the axial direction AD.

At least a portion of the wall busbar unit 560 is positioned to line up with the motor fin 72 in the radial direction RD. For example, the wall busbar unit 560 is positioned so as not to protrude from the motor fin 72 in the axial direction AD. The motor fin 72 extends further toward the first opposing wall 552 than the wall busbar unit 560 in the axial direction AD.

As shown in FIG. 85 , the wall busbar unit 560 has a unit inner peripheral surface 561 and a unit outer peripheral surface 562 . The unit inner peripheral surface 561 is the inner peripheral surface of the wall busbar unit 560 and faces radially inward. The unit outer peripheral surface 562 is the outer peripheral surface of the wall busbar unit 560 and faces radially outward. In the wall busbar unit 560, the unit outer peripheral surface 562 overlaps the motor inner wall surface 551b. In the wall busbar unit 560 , the unit inner peripheral surface 561 and the unit outer peripheral surface 562 are formed by the wall busbar protection portion 570 .

The wall busbar protection portion 570 has thermal conductivity. The wall busbar unit 560 is fixed to the motor outer wall 551 so that the heat of the wall power busbar 565 is transferred to the motor outer wall 551 via the wall busbar protection portion 570 . For example, the unit outer peripheral surface 562 is in contact with the motor inner wall surface 551b. The wall busbar unit 560 is fixed to the motor outer peripheral wall 551 with fasteners such as screws. The wall busbar unit 560 is fixed to the housing body 71 . If the wall busbar unit 560 is fixed to the motor outer wall 551, the wall busbar unit 560 and the motor outer wall 551 do not have to be in contact with each other. For example, a heat transfer member such as heat transfer gel may be provided between the wall busbar unit 560 and the motor outer peripheral wall 551 .

In the wall busbar unit 560, the wall power busbar 565 is fixed to the motor inner wall surface 551b by fixing the wall busbar protection portion 570 to the motor inner wall surface 551b. The wall power bus bar 565 extends in the circumferential direction CD along the motor inner wall surface 551b. The wall power busbar 565 is in a state of being superimposed on the motor inner wall surface 551b. The wall power busbar 565 is provided between the first opposing wall 552 and the first rotor 300a in the axial direction AD. The wall power busbar 565 is provided at a position away from each of the first rotor 300a, the stator 200 and the coil 211 in the axial direction AD. Also, the wall power bus bar 565 is provided at a position away from the first opposing wall 552 in the axial direction AD. The wall power busbar 565 is provided in the motor space 550a. The wall power bus bar 565 is provided inside the motor case 550 with respect to the motor space 550a. The wall power busbar 565 corresponds to the energization busbar and the inner busbar.

At least a portion of the wall power busbar 565 is positioned to line up with the motor fin 72 in the radial direction RD. For example, the wall power bus bar 565 is positioned so as not to protrude from the motor fin 72 in the axial direction AD. The motor fin 72 extends further toward the first opposing wall 552 than the wall power busbar 565 in the axial direction AD.

Wall power bus bar 565 extends in a plate shape in a direction orthogonal to radial direction RD. The wall power busbar 565 has a busbar plate surface 566 and a busbar side end surface 567 . The busbar plate surface 566 is the plate surface of the wall power busbar 565 and extends in a direction perpendicular to the radial direction RD. The busbar plate surface 566 extends in the axial direction AD while facing the motor inner wall surface 551b. The busbar plate surface 566 extends in the circumferential direction CD along the motor inner wall surface 551b. A pair of busbar plate surfaces 566 are arranged in the radial direction RD with a busbar side end surface 567 interposed therebetween.

The busbar side end face 567 is a side end face of the wall power busbar 565 and extends in a direction perpendicular to the axial direction AD. The busbar side end surface 567 connects the pair of busbar plate surfaces 566 . A pair of busbar side end faces 567 are arranged in the axial direction AD. The pair of busbar side end surfaces 567 are arranged along the motor inner wall surface 551b.

A plurality of wall power busbars 565 are arranged in the radial direction RD. A plurality of wall power busbars 565 extend parallel to each other. The busbar plate surfaces 566 of the two wall power busbars 565 adjacent to each other in the radial direction RD face each other. Two adjacent wall power busbars 565 are separated from each other via a portion of the wall busbar protection portion 570 . Among the plurality of wall power bus bars 565 , the wall power bus bar 565 that is radially outermost overlaps the motor inner wall surface 551 b with a portion of the wall bus bar protection portion 570 interposed therebetween. The rest of the wall power busbars 565 are superimposed on the motor inner wall surface 551 b via at least one wall power busbar 565 and part of the wall busbar protection portion 570 .

The motor device 60 has a conductive joint 580 . At conductive joint 580, wall power bus bar 565 and power lead-out line 212 are electrically connected. The conductive joint portion 580 corresponds to the busbar connection portion 263a. Conductive joint 580 includes a connector such as a bolt that connects wall power bus bar 565 and power lead-out line 212 . This connector is electrically conductive. Wall power bus bar 565 and power lead-out line 212 may be connected by welding or the like. In this configuration, conductive joint 580 includes a weld.

In this embodiment, the motor outer peripheral wall 551 is a tubular portion extending in the axial direction AD in the motor case 550 . Therefore, even if vibration occurs in the axial direction AD in the axial gap type motor device 60, the motor outer peripheral wall 551 is less likely to vibrate so as to deform in the axial direction AD. On the other hand, for example, the opposing walls 552 and 553 are likely to vibrate in the axial direction AD because the opposing walls 552 and 553 extend in a plate shape perpendicular to the axial direction AD.

In contrast, according to the present embodiment, the wall power bus bar 565 is fixed to the motor outer peripheral wall 551 extending in the axial direction AD. That is, the wall power bus bar 565 is fixed to the motor outer peripheral wall 551 having high rigidity in the motor case 550 . In this configuration, even if vibration in the axial direction AD occurs with the rotation of the rotors 300a and 300b, the wall power busbar 565 is also less likely to vibrate due to the fact that the motor outer peripheral wall 551 is less likely to vibrate in the axial direction AD. Therefore, in the wall power bus bar 565, the motor outer peripheral wall 551 enhances the resistance to vibration in the axial direction AD.

Moreover, the wall power bus bar 565 extends in the circumferential direction CD along the motor inner wall surface 551b. Therefore, the vibration resistance of the motor outer peripheral wall 551 is imparted to the entire wall power bus bar 565 in the circumferential direction CD. By using the motor outer wall 551 in this manner, the vibration resistance of the wall power bus bar 565 can be improved over a wide range. Therefore, the reliability of the motor device 60 against vibration can be enhanced.

Further, since the wall power bus bar 565 is less likely to vibrate in the axial direction AD, the conductive joint portion 580 is also less likely to vibrate in the axial direction AD. Therefore, it is possible to suppress the occurrence of an abnormality in the conductive joint 580 such that the joint between the wall power bus bar 565 and the power lead-out line 212 by the conductive joint 580 is released due to vibration. Therefore, in addition to the wall power bus bar 565, the conductive joint 580 can also be improved in vibration resistance.

In the axial gap type motor 61, the stator 200 and the rotors 300a and 300b are aligned in the axial direction AD, so the electromagnetic force in the axial direction AD tends to increase. For this reason, for example, in the first embodiment, due to the power bus bar 261 being fixed to the rear frame 370, the electromagnetic force generated by the motor 61 is transmitted through the rotors 300a and 300b and the rear frame 370. There is concern about propagation to the power bus bar 261 . For example, when the rotors 300a and 300b vibrate in the axial direction AD as the motor 61 is driven, this vibration is transmitted from the rotors 300a and 300b to the power bus bar 261 via the shaft 340, the first bearing 360, and the rear frame 370. I am concerned that it will be transmitted. Note that the axial direction AD is sometimes called an axial direction or a thrust direction.

In contrast, according to this embodiment, the wall power bus bar 565 is provided at a position away from the first opposing wall 552 that supports the first bearing 360 . In this configuration, even if vibrations from the rotors 300 a and 300 b are transmitted to the first opposing wall 552 via the first bearings 360 , the vibrations are not transmitted to the wall power bus bar 565 . Therefore, it is possible to reliably prevent the wall power bus bar 565 from vibrating in the axial direction AD together with the first opposing wall 552 .

According to this embodiment, the wall power busbar 565 is provided between the coil 211 and the first opposing wall 552 in the axial direction AD. In this configuration, the distance between the wall power busbar 565 and the coil 211 can be minimized in the axial direction AD. That is, the power lead-out line 212 can be shortened as much as possible. Therefore, when vibration occurs in motor device 60 , it is possible to suppress large vibration of power lead-out line 212 . By suppressing vibration of power lead wire 212 in this way, it is possible to suppress disconnection between power lead wire 212 and wall power bus bar 565 at conductive joint portion 580 .

According to this embodiment, the conductive joint 580 is provided at a position apart from the first opposing wall 552 in the axial direction AD. Therefore, in this configuration, even if vibrations from the rotors 300 a and 300 b are transmitted to the first opposing wall 552 via the first bearings 360 , the vibrations are not transmitted to the conductive joint 580 . Therefore, it is possible to prevent the conductive joint portion 580 from vibrating and the joint between the wall power bus bar 565 and the power lead-out line 212 to be released.

According to this embodiment, the wall power bus bar 565 is provided at a position away from the coil 211 in the axial direction AD. In this configuration, the wall power bus bar 565 is not located between the motor outer wall 551 and the coil 211 in the radial direction RD. Therefore, the motor outer peripheral wall 551 can be arranged at a position as close as possible to the coil 211 in the radial direction RD. Therefore, the positional relationship between the wall power bus bar 565 and the coil 211 can reduce the size of the motor outer wall 551 in the radial direction RD. That is, the motor case 550 can be miniaturized in the radial direction RD.

For example, unlike the present embodiment, assume a configuration in which the wall power bus bar 565 is located between the motor outer peripheral wall 551 and the coil 211 in the radial direction RD. In this configuration, the motor outer wall 551 needs to be arranged radially outwardly away from the coil 211 by the wall power bus bar 565 . For this reason, the motor outer wall 551 tends to increase in size in the radial direction RD by the wall power bus bar 565 .

According to this embodiment, the wall power bus bar 565 is provided at a position away from the rotors 300a, 300b in the axial direction AD. In this configuration, the wall power busbar 565 is not located between the motor outer peripheral wall 551 and the rotors 300a, 300b in the radial direction RD. Therefore, the motor outer peripheral wall 551 can be arranged as close as possible to the rotors 300a and 300b in the radial direction RD. Therefore, the positional relationship between wall power bus bar 565 and rotors 300a and 300b allows the size of motor outer wall 551 to be reduced in radial direction RD.

For example, unlike the present embodiment, assume a configuration in which the wall power bus bar 565 is located between the motor outer peripheral wall 551 and the rotors 300a and 300b in the radial direction RD. In this configuration, it is necessary to arrange the motor outer wall 551 at a position spaced radially outward from the rotors 300a and 300b by the wall power bus bar 565 .

According to the present embodiment, the wall power busbar 565 is provided such that the busbar plate surface 566 extends in the axial direction AD. In this configuration, wall power bus bar 565 has a high rigidity against deformation in the axial direction AD and a high rigidity against deformation in the radial direction RD. Therefore, even if the wall power bus bar 565 is subjected to vibration in the axial direction AD, the wall power bus bar 565 is less likely to deform in the axial direction AD. Therefore, it is possible to suppress the wall power bus bar 565 from vibrating significantly in the axial direction AD. That is, the resistance to vibration in the axial direction AD can be enhanced for the wall power bus bar 565 .

According to this embodiment, the wall electric power bus bar 565 is laminated in multiple numbers in the radial direction RD. With this configuration, the installation space for installing a plurality of wall power busbars 565 can be made smaller in the radial direction RD in which a plurality of wall power busbars 565 are stacked. For this reason, for example, compared to a configuration in which a plurality of busbars extending in the radial direction RD to be orthogonal to the axial direction AD are arranged in the radial direction RD, the installation space for installing the plurality of wall power busbars 565 is increased in the radial direction RD. can be shortened to Therefore, it is possible to suppress an increase in the size of the motor outer peripheral wall 551 in the radial direction RD, which is the stacking direction of the wall power busbars 565 .

According to this embodiment, the wall power bus bar 565 is provided at a position aligned with the motor fin 72 in the radial direction RD. In this configuration, the wall power busbar 565 is positioned to easily transfer heat to the motor fins 72 . Therefore, the heat of the wall power bus bar 565 is easily released to the outside from the motor fins 72 via the motor outer peripheral wall 551 . Therefore, the cooling effect of the wall power bus bar 565 by the motor fins 72 can be enhanced.

According to this embodiment, the motor device 60 is provided on the aircraft and drives it to fly. With this configuration, it is possible to improve the reliability of the motor device 60 against vibration while the aircraft is in flight by driving the motor device 60 . As a result, the safety of the aircraft can be enhanced.

<Fourth Embodiment>
In the third embodiment, the wall power bus bar 565 extends in a plate shape in the direction perpendicular to the radial direction RD. On the other hand, in the fourth embodiment, the wall power bus bar 565 extends in a plate shape in a direction perpendicular to the axial direction AD. Configurations, functions, and effects not specifically described in the fourth embodiment are the same as those in the third embodiment. In the fourth embodiment, the points different from the third embodiment will be mainly described.

As shown in FIG. 86, the wall power bus bar 565 extends radially inward from the motor inner wall surface 551b. In wall power busbar 565, busbar plate surface 566 extends in a direction perpendicular to axial direction AD. The busbar plate surface 566 extends radially inward from the motor inner wall surface 551b. The pair of busbar plate surfaces 566 are arranged in the axial direction AD with the busbar side end surface 567 interposed therebetween.

The busbar side end surface extends in a direction perpendicular to the radial direction RD. The busbar side end surface 567 extends in the axial direction AD while facing the motor inner wall surface 551b. The busbar side end surface 567 extends in the circumferential direction CD along the motor inner wall surface 551b. The pair of busbar side end surfaces 567 are arranged in the radial direction RD via the busbar plate surface 566 .

A plurality of wall power busbars 565 are arranged in the axial direction AD. In the plurality of wall power busbars 565, each busbar side end surface 567 faces the motor inner wall surface 551b. In the plurality of wall power busbars 565 , the busbar side end surfaces 567 of the respective wall busbars 565 are overlapped with the motor inner wall surface 551 b via the wall busbar protection portion 570 . The plurality of wall power busbars 565 are arranged in the axial direction AD along each of the unit inner peripheral surface 561 and the unit outer peripheral surface 562 .

In this embodiment, the wall electric power bus bar 565 is multiply laminated in the axial direction AD. With this configuration, the installation space for installing a plurality of wall power busbars 565 can be made smaller in the axial direction AD where a plurality of wall power busbars 565 are stacked. For this reason, for example, compared to a configuration in which a plurality of busbars extending in the axial direction AD are arranged in the axial direction AD so as to be orthogonal to the radial direction RD, the installation space for installing the plurality of wall power busbars 565 is reduced in the axial direction AD. can be shortened to Therefore, it is possible to suppress the motor outer peripheral wall 551 from increasing in size in the axial direction AD, which is the stacking direction of the wall power busbars 565 .

Moreover, since each of the plurality of wall power busbars 565 is superimposed on the motor inner wall surface 551b, the heat of the plurality of wall power busbars 565 is easily transferred to the motor inner wall surface 551b. For example, when the heat of one wall power busbar 565 is transmitted to the motor inner wall surface 551b, the heat is not transmitted to the motor inner wall surface 551b via the other wall power busbar 565. Therefore, it is possible to suppress variations in the heat radiation effect of the wall power busbars 565 by the motor outer peripheral wall 551 and the motor fins 72 among the plurality of wall power busbars 565 .

<Fifth Embodiment>
In the above-described third embodiment, the plurality of wall power busbars 565 are arranged in parallel in the radial direction RD. In contrast, in the fifth embodiment, a plurality of wall power busbars 565 are arranged in series in the axial direction AD. Configurations, functions, and effects not specifically described in the fifth embodiment are the same as those in the third embodiment. In the fifth embodiment, the points different from the third embodiment will be mainly described.

As shown in FIG. 87, the wall power bus bar 565 extends in a direction perpendicular to the radial direction RD, as in the third embodiment. On the other hand, the plurality of wall power busbars 565 are arranged in the axial direction AD as in the fourth embodiment. A plurality of wall power busbars 565 are arranged along the motor inner wall surface 551b. In the plurality of wall power busbars 565, each busbar plate surface 566 is overlapped with the motor inner wall surface 551b. Two wall power busbars 565 adjacent to each other in the axial direction AD have their respective busbar side end surfaces 567 opposed to each other.

In this embodiment, since the plurality of wall power busbars 565 are arranged in series in the axial direction AD, the space for installing the plurality of wall power busbars 565 can be made thinner in the radial direction RD. Therefore, it is possible to prevent the motor outer wall 551 from increasing in size in the radial direction RD due to the presence of the plurality of wall power bus bars 565 . Moreover, since the busbar plate surfaces 566 of the plurality of wall power busbars 565 overlap the motor inner wall surface 551b, heat is easily conducted from the busbar plate surfaces 566 to the motor inner wall surface 551b. Therefore, in each of the plurality of wall power bus bars 565, the heat dissipation effect of the motor outer peripheral wall 551 and the heat dissipation fins can be enhanced as much as possible.

<Sixth embodiment>
In the third embodiment, the direction in which the wall power busbars 565 extend is the same for the plurality of wall power busbars 565 . On the other hand, in the sixth embodiment, the wall power busbars 565 extend in different directions for the plurality of wall power busbars 565 . Configurations, functions, and effects not specifically described in the sixth embodiment are the same as those in the third embodiment. In the sixth embodiment, the points different from the third embodiment will be mainly described.

As shown in FIG. 88, the motor outer peripheral wall 551 has inner wall projections 591 . The inner wall projection 591 is a projection provided on the motor inner wall surface 551b. The inner wall protrusion 591 is a portion of the motor outer peripheral wall 551 that protrudes radially inward. The inner wall projection 591 is part of the motor outer peripheral wall 551 . The inner wall projection 591 extends annularly in the circumferential direction CD. The inner wall projection 591 is provided between the first opposing wall 552 and the first rotor 300a in the axial direction AD. The inner wall projection 591 is located away from both the first opposing wall 552 and the first rotor 300a in the axial direction AD.

The inner wall projection 591 has a projection tip surface 591a and a projection side surface 591b. The protrusion tip surface 591a and the protrusion side surface 591b are included in the motor inner wall surface 551b. The protrusion tip surface 591a and the protrusion side surface 591b extend annularly in the circumferential direction CD. The protrusion tip surface 591a is the tip surface of the inner wall protrusion 591 and faces radially inward. The protrusion side surface 591b extends in a direction perpendicular to the axial direction AD. A pair of the protrusion side surfaces 591b are arranged in the axial direction AD via the protrusion tip surface 591a.

The wall busbar unit 560 is fixed to the inner wall projection 591 . For example, the wall busbar unit 560 is provided so as to cover the inner wall projection 591 from the inside in the radial direction. The wall busbar unit 560 is fixed to each of the protrusion tip surface 591a and the protrusion side surface 591b. For example, the wall bus bar protection portion 570 is in a state of being superimposed on the protrusion tip surface 591a and the protrusion side surface 591b.

Among the plurality of wall power busbars 565, the direction in which at least one wall power busbar 565 extends is different from the direction in which the remaining wall power busbars 565 extend. For example, one wall power busbar 565 extends in a direction perpendicular to the radial direction RD, and the remaining wall power busbars 565 extend in a direction perpendicular to the axial direction AD. The plurality of wall power busbars 565 include a wall power busbar 565 superimposed on the projection tip surface 591a and a wall power busbar 565 superimposed on the projection side surface 591b.

At least one wall power busbar 565 is secured to the inner wall projection 591 . The plurality of wall power busbars 565 include a wall power busbar 565 fixed to the projection tip surface 591a and a wall power busbar 565 fixed to the projection side surface 591b. At least one wall power busbar 565 is secured to the inner wall protrusion 591 such that heat is transferred to the inner wall protrusion 591 . In at least one wall power bus bar 565 , the heat of the wall power bus bar 565 is radiated outside from the motor fins 72 via the inner wall projections 591 .

<Seventh embodiment>
In the third embodiment, the wall power bus bar 565 as the power bus bar is provided inside the motor case 550 with respect to the motor space 550a. On the other hand, in the seventh embodiment, the energization bus bar is provided outside the motor case 550 with respect to the motor space 550a. Configurations, functions, and effects that are not specifically described in the seventh embodiment are the same as those in the third embodiment. In the seventh embodiment, the points different from the third embodiment will be mainly described.

As shown in FIG. 89, the first opposing wall 552 is provided with a frame opening 373 . A frame opening 373 is provided in a rear base portion 375 of the rear frame 370 . The frame opening 373 is located radially inwardly away from the rear outer peripheral portion 376 . The frame opening 373 is located radially inwardly away from the motor outer peripheral wall 551 . The frame opening 373 is positioned closer to the outer periphery and closer to the motor outer peripheral wall 551 than the motor axis Cm in the radial direction RD. For example, the frame opening 373 is radially outward of the rotors 300a, 300b.

In the motor case 550 , the motor outer peripheral wall 551 protrudes outward from the first opposing wall 552 . The motor outer peripheral wall 551 extends from the first opposing wall 552 toward the side opposite to the motor space 550a in the axial direction AD. In the motor outer peripheral wall 551, the motor outer wall surface 551a and the motor inner wall surface 551b extend in the axial direction AD from the first opposing wall 552 toward the side opposite to the motor space 550a.

In this embodiment, part of the rear frame 370 protrudes to the side opposite to the motor space 550a in the axial direction AD. The rear frame 370 has an outer peripheral base portion 376a and an outer peripheral extension portion 376b. The outer peripheral base portion 376 a and the outer peripheral extension portion 376 b are included in the rear outer peripheral portion 376 . The outer peripheral base portion 376a is provided radially outward of the rear base portion 375, similarly to the rear outer peripheral portion 376 of the third embodiment. The outer peripheral extension portion 376b extends from the outer peripheral base portion 376a to the side opposite to the motor space 550a in the axial direction AD.

A portion of the motor outer peripheral wall 551 that protrudes outward from the first opposing wall 552 is formed by an outer peripheral extending portion 376 b of the rear frame 370 . The outer peripheral extending portion 376b forms a motor outer wall surface 551a and a motor inner wall surface 551b as a part of the motor outer peripheral wall 551 . The outer peripheral surface of the outer peripheral extension portion 376b is the motor outer wall surface 551a, and the inner peripheral surface of the outer peripheral extension portion 376b is the motor inner wall surface 551b.

In this embodiment, the wall busbar unit 560 of the third embodiment is provided outside the motor case 550 with respect to the motor space 550a. In this embodiment, the wall busbar unit 560 provided outside the motor case 550 is called an outside busbar unit 610 . The outer busbar unit 610 basically has the same configuration as the wall busbar unit 560 of the third embodiment. For example, the outer busbar unit 610 is fixed to the motor outer wall 551 while extending in the circumferential direction CD along the motor inner wall 551b. Also, the outside busbar unit 610 has a unit inner peripheral surface 561 and a unit outer peripheral surface 562, like the wall busbar unit 560 of the third embodiment.

The outer busbar unit 610 has a wall power busbar 565 and a wall busbar protector 570 . In this embodiment, the wall power busbar 565 of the outer busbar unit 610 is referred to as the outer power busbar 615 , and the wall busbar protection section 570 of the outer busbar unit 610 is referred to as the outer busbar protection section 620 . The outer power busbar 615 basically has the same configuration as the wall power busbar 565 of the third embodiment. For example, the outer power busbar 615 is fixed to the motor outer wall 551 via the outer busbar protector 620 . Further, the outer power busbar 615 has a busbar plate surface 566 and a busbar side end surface 567, like the wall power busbar 565 of the third embodiment. The outer busbar protection portion 620 basically has the same configuration as the wall busbar protection portion 570 of the third embodiment. For example, the outer busbar protection portion 620 is in contact with the motor outer peripheral wall 551 .

The outer busbar unit 610 is fixed to the outer peripheral extension portion 376b of the rear frame 370. As shown in FIG. The outer busbar unit 610 extends in the circumferential direction CD along the outer peripheral extension portion 376b. The outer busbar unit 610 is provided on the side opposite to the first rotor 300a with the first opposing wall 552 interposed therebetween in the axial direction AD. The outer busbar unit 610 is provided at a position away from the rotors 300a and 300b, the stator 200, the coil 211 and the first opposing wall 552 in the axial direction AD.

The outer busbar unit 610 is located away from the motor fin 72 in the axial direction AD. The outer busbar unit 610 is on the opposite side of the motor fin 72 via the first opposing wall 552 in the axial direction AD. Note that the motor fins 72 may be provided on the rear outer peripheral surface 370a. In this configuration, at least a portion of the outer busbar unit 610 may be aligned with the motor fin 72 in the radial direction RD.

A power lead-out line 212 is connected to the outer busbar unit 610 . This power lead-out line 212 extends from the coil 211 toward the outer busbar unit 610 through the frame opening 373 . At least part of the outer busbar unit 610 is positioned to line up with the frame opening 373 in the axial direction AD. In the outer busbar unit 610 , at least one of the plurality of outer power busbars 615 is positioned to line up with the frame opening 373 . For example, frame opening 373 is located across at least one outer power bus bar 615 in radial direction RD.

In the outer busbar unit 610 , the outer power busbar 615 is provided outside the motor case 550 by providing the outer busbar protection portion 620 outside the motor case 550 . The outer power bus bar 615 is fixed to the outer peripheral extension portion 376 b of the rear frame 370 . The outer power bus bar 615 extends in the circumferential direction CD along the outer peripheral extension portion 376b. The outer power bus bar 615 is provided on the side opposite to the first rotor 300a via the first opposing wall 552 in the axial direction AD. The outer power bus bar 615 is provided at a position away from the rotor 300a300b, the stator 200, the coil 211 and the first opposing wall 552 in the axial direction AD. The outer power busbar 615 corresponds to an energization busbar and an outer busbar.

The outer power busbar 615 is located away from the motor fins 72 in the axial direction AD. The outer power busbar 615 is on the opposite side of the motor fin 72 via the first opposing wall 552 in the axial direction AD. In addition, in the configuration in which the motor fins 72 are provided on the rear outer peripheral surface 370a, at least a portion of the outer power bus bar 615 may be positioned so as to be aligned with the motor fins 72 in the radial direction RD.

A power lead-out line 212 is electrically connected to the outside power bus bar 615 . At least one of the plurality of outer power busbars 615 is positioned to line up with the frame opening 373 in the axial direction AD. At least a portion of the outer power busbar 615 is positioned to line up with the frame opening 373 in the axial direction AD.

According to this embodiment, the outer power bus bar 615 is provided on the opposite side of the coil 211 via the first opposing wall 552 in the axial direction AD. With this configuration, the heat of the outer power bus bar 615 is less likely to stay in the motor space 550a. Therefore, it is difficult for the temperature of the motor space 550 a to rise due to the heat of the outer power bus bar 615 . Therefore, a configuration in which the internal temperature of motor case 550 is less likely to rise can be realized by the position of outside power bus bar 615 .

Further, in the motor case 550 , the motor outer peripheral wall 551 protrudes from the first opposing wall 552 . Therefore, even outside the motor case 550, by fixing the outer power bus bar 615 to the projecting portion of the motor outer peripheral wall 551, the vibration resistance of the outer power bus bar 615 can be enhanced. That is, even outside the motor case 550, the vibration resistance of the outer power bus bar 615 can be enhanced by the outer peripheral extension portion 376b of the rear frame 370. FIG.

<Eighth embodiment>
In the seventh embodiment, at least part of the frame opening 373 is provided at a position aligned with the outer busbar unit 610 in the axial direction AD. In contrast, in the eighth embodiment, the frame opening 373 is provided at a position away from the outer busbar unit 610 in the radial direction RD. Configurations, actions, and effects not specifically described in the eighth embodiment are the same as those in the seventh embodiment. In the eighth embodiment, the points different from the seventh embodiment will be mainly described.

As shown in FIG. 90 , the frame opening 373 is positioned radially inwardly spaced from the outer busbar unit 610 and the outer power busbar 615 . The frame opening 373 of this embodiment is positioned radially inward of the frame opening 373 of the seventh embodiment. For example, the frame openings 373 of this embodiment are positioned to line up with at least a portion of the rotors 300a and 300b in the axial direction AD. In addition, the frame opening 373 is aligned with at least a portion of the core 231 in the axial direction AD.

In the present embodiment, the power lead wire 212 drawn out from the frame opening 373 is positioned radially inwardly away from the outer power bus bar 615 . The outer power bus bar 615 and the power lead-out line 212 are connected via the intervening joint portion 581 . Joint intervening portion 581 is included in motor device 60 . The intervening joint portion 581 is formed of a busbar member or an electric wire. Joint intervening portion 581 electrically connects outer power bus bar 615 and power lead-out line 212 . Joint interposer 581 is joined to outer power busbar 615 by conductive joint 580 . Also, the intervening joint portion 581 is joined to the power lead-out line 212 by the conductive joint portion 580 . The conductive joint portion 580 and the joint intermediate portion 581 correspond to the busbar connection portion.

In motor case 550 , frame opening 373 opens motor space 550 a to the outside of motor case 550 . In the motor case 550, the motor space 550a is ventilated through the frame opening 373. As shown in FIG. For example, gas such as air flows into the motor space 550 a through at least one of the plurality of frame openings 373 , and the gas flows out of the motor space 550 a through the other frame openings 373 . The frame opening 373 is a hole for ventilating the motor space 550a. The frame opening 373 corresponds to a vent.

According to this embodiment, the frame opening 373 is located radially inwardly spaced from the outer power busbar 615 . In this configuration, when the gas for ventilating the motor space 550a passes through the frame opening 373, the outer power busbar 615 is less likely to restrict the flow of the gas. Therefore, it is difficult for the outside power bus bar 615 to reduce the air permeability of the frame opening 373 . Therefore, when the heat of the motor space 550a is released by ventilation of the motor space 550a, it is possible to prevent the heat radiation effect of the motor space 550a from being lowered by the outer power bus bar 615. FIG.

<Ninth Embodiment>
In the third embodiment, the motor fins 72 are provided on the motor outer peripheral wall 551 . In contrast, in the ninth embodiment, the motor outer peripheral wall 551 is provided with a water jacket. Configurations, functions, and effects not specifically described in the ninth embodiment are the same as those in the third embodiment. In the ninth embodiment, differences from the third embodiment will be mainly described.

As shown in FIG. 91, a cooling device 600 is provided for the motor device 60 . Cooling device 600 is included in motor device unit 50 . Cooling device 600 cools motor device 60 using a coolant. As the coolant, for example, a liquid such as cooling liquid is used. The cooling device 600 has a coolant pump 601 and coolant flow paths 602 . A coolant channel 602 is a channel through which coolant flows. The coolant channel 602 is a circulation channel through which cooling is circulated. The refrigerant pump 601 pumps the refrigerant so that the refrigerant flows through the refrigerant flow path 602 . Refrigerant pump 601 is, for example, an electric pump. Note that the refrigerant pump 601 may be a mechanical pump that pumps the refrigerant by driving the motor 61 .

At least part of the coolant channel 602 is built in the motor outer peripheral wall 551 . The motor outer peripheral wall 551 has a flow path forming portion 605 . The flow path forming portion 605 is a portion forming the coolant flow path 602 on the outer peripheral wall 551 of the motor. In the flow path forming portion 605, a coolant flow path 602 is formed between the motor outer wall surface 551a and the motor inner wall surface 551b. The flow path forming portion 605 extends annularly in the circumferential direction CD on the motor outer peripheral wall 551 . In the motor outer peripheral wall 551, a coolant channel 602 extends annularly in the circumferential direction CD. In the motor outer peripheral wall 551, the coolant circulates by flowing in the circumferential direction CD.

In the motor device 60 , the heat in the motor space 550 a is released to the coolant in the coolant channel 602 . The heat imparted to the coolant is released to the outside from the motor outer peripheral wall 551 . Coolant flow path 602 forms a water jacket in motor case 550 . The coolant channel 602 promotes the release of heat in the motor space 550a to the outside. The coolant channel 602 corresponds to a heat dissipation promoting portion.

At least part of the wall power bus bar 565 is provided at a position aligned in the radial direction RD with the coolant flow path 602 . For example, the wall power bus bar 565 is positioned so as not to protrude from the flow path forming portion 605 in the axial direction AD. The flow path forming portion 605 extends toward the first opposing wall 552 from the wall power bus bar 565 in the axial direction AD.

According to this embodiment, the wall power busbar 565 is provided at a position aligned with the coolant flow path 602 in the radial direction RD. In this configuration, the wall power busbar 565 is positioned to easily transfer heat to the coolant in the coolant channel 602 . Therefore, the heat of the wall power bus bar 565 is easily released to the outside from the refrigerant in the refrigerant flow path 602 via the motor outer peripheral wall 551 . Therefore, the cooling effect of the wall power bus bar 565 by the coolant channel 602 can be enhanced.

Note that the motor device 60 may have both the motor fins 72 and the coolant flow paths 602 . For example, the motor fins 72 may be provided outside the coolant flow path 602 on the motor outer wall 551 . With this configuration, the heat given to the coolant in the coolant passage 602 is easily released from the motor fins 72 to the outside. Therefore, the coolant can be quickly cooled by the motor fins 72 .

<Other embodiments>
The disclosure in this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations thereon by those skilled in the art. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiments, and various modifications can be made. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure encompasses abbreviations of parts and elements of the embodiments. The disclosure encompasses the permutations, or combinations of parts, elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope is indicated by the description of the claims, and should be understood to include all changes within the meaning and range of equivalents to the description of the claims.

<Construction group A>
In each of the embodiments described above, the busbar unit 260 and the neutral point busbar 290 may be separated in at least one of the axial direction AD, the radial direction RD, and the circumferential direction CD. Also, the power busbar 261 does not have to be protected by the busbar protection unit 270 . Even in this configuration, if the neutral point bus bar 290 is provided in the stator side space S1 and the power bus bar 261 is provided in the inverter side space S2, the insulation reliability between the power bus bar 261 and the neutral point bus bar 290 is lowered. It's getting harder. Also, one of the power bus bar 261 and the neutral point bus bar 290 may be provided in the stator-side space S1, and the other should be provided in the inverter-side space S2.

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

<Constituent group C>
In each of the embodiments described above, the coil portion 215 may be arranged in the motor housing 70 regardless of the position of the stator holding portion 171 . For example, the coil portion 215 may be provided at a position displaced from the shaft holding portion 174 in the circumferential direction CD. Further, in the motor housing 70, the stator holding portion 171 may not be provided on the inner peripheral surface 70b as long as the coil protection portion 250 is in contact with the inner peripheral surface 70b.

<Constituent group D>
In each of the embodiments described above, the motor device 60 and the inverter device 80 may share a housing. For example, motor 61 and inverter 81 may be housed in one housing. At least one of the motor fins 72 and the inverter fins 92 may be provided in the unit housing 51 . In the unit housing 51, the coil protection portion 250 may be provided at a position spaced apart from the inner peripheral surface 70b.

<Constituent group P>
In each of the above-described embodiments, the current-carrying bus bar such as the wall power bus bar 565 can be positioned anywhere in the axial direction AD as long as it is fixed to the motor outer peripheral wall 551 . For example, in the above-described first embodiment, the wall power bus bar 565 may be provided at a position aligned with the stator 200 and the rotors 300a and 300b in the radial direction RD.

In each of the above-described embodiments, the energizing bus bar may not be provided with a protective portion such as the wall bus bar protective portion 570 . For example, in the first embodiment, the wall power busbar 565 may be fixed to the motor inner wall surface 551b without the wall busbar protection portion 570 interposed therebetween. The wall power bus bar 565 may be fixed to the motor inner wall surface 551b via a heat transfer member such as heat transfer gel.

In each of the above embodiments, the energizing busbar may be the neutral point busbar 290 . For example, in the above third embodiment, the neutral point bus bar 290 may be fixed to the motor outer peripheral wall 551 . In the configuration in which the neutral point bus bar 290 is provided on the opposite side of the stator 200 via the rotors 300a and 300b, the neutral lead wire 213 is pulled out from the coil 211 toward the neutral point bus bar 290 in the axial direction AD. is preferred.

<Construction group A>
In a motor such as an axial gap type motor, there is concern that the insulation reliability of the electrical insulation state between the power busbar and the neutral point busbar may deteriorate. In view of this, the present invention provides a rotating electric machine capable of enhancing electrical insulation reliability.

According to feature A1, the neutral point busbar (290) is provided at a position spaced apart from the busbar protection part (270) that has electrical insulation and protects the power busbar (261). In this configuration, the neutral point bus bar (290) and the power bus bar (261) do not come into contact with each other, and the neutral point bus bar (290) and the bus bar protection unit (270) do not even come into contact with each other. It has become. For this reason, the neutral point bus bar (290) and the bus bar protection part (270) are spaced apart from each other to reduce the reliability of the electrical insulation between the neutral point bus bar (290) and the power bus bar (261). It can be suppressed by Therefore, the distance between the neutral point busbar (290) and the busbar protection portion (270) increases the electrical insulation reliability of the rotating electric machine (60).

According to feature A10, one of the first space (S1) and the second space (S2) aligned in the axial direction (AD) is provided with a power busbar (261) and the other is provided with a neutral point busbar (290). is provided. Moreover, the first space (S1) and the second space (S2) are separated by the space partition (370). In this configuration, the space partition (370) restricts contact between the neutral point bus bar (290) and the power bus bar (261). In this way, the space partition (370) can suppress the deterioration of the insulation reliability with respect to the electrical insulation state between the neutral point bus bar (290) and the power bus bar (261). Therefore, the electrical insulation reliability of the rotating electrical machine (60) can be enhanced by the space partition (370).

[Feature A1]
A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having multi-phase coils (211);
Rotors (300, 300a, 300b) that rotate about a rotation axis (Cm) and are aligned with the stator in an axial direction (AD) in which the rotation axis extends;
a power busbar (261) electrically connected to and supplying power to the coil;
a busbar protector (270) having electrical insulation and protecting the power busbar;
a neutral point bus bar (290) provided at a position spaced from the bus bar protection section and electrically connected to the neutral point (65) side in each of the multiple phase coils;
A rotating electric machine.

[Feature A2]
The first space and the second space extend in a direction orthogonal to the rotation axis, and the first space (S1) accommodating the stator and the second space (S2) not accommodating the stator are aligned along the rotation axis. A space partition (370) that separates the
The rotary electric machine according to feature A1, wherein one of the first space and the second space is provided with a power busbar, and the other is provided with a neutral point busbar.

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

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

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

[Feature A6]
a relay bus bar (280) electrically connected to a power converter (81) that converts power and supplies it to the power bus bar;
a terminal block (285) supporting a connecting portion between the power busbar and the relay busbar;
The rotating electric machine according to any one of features A1 to A5, comprising:

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

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

[Feature A9]
an orthogonal frame (370) extending in a direction orthogonal to the axis of rotation;
a rotation detection part (421) provided on the opposite side of the neutral point busbar in the axial direction via the orthogonal frame for detecting the rotation angle of the rotor;
The rotating electric machine according to any one of features A1 to A8, comprising:

[Feature A10]
A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having multi-phase coils (211);
Rotors (300, 300a, 300b) that are aligned with the stator in the axial direction (AD) in which the axis of rotation (Cm) extends and rotate about the axis of rotation with respect to the stator;
a power busbar (261) electrically connected to and supplying power to the coil;
a neutral point busbar (290) electrically connected to the neutral point (65) side in each of the multi-phase coils;
The first space and the second space are separated so that the first space (S1) in which the stator is accommodated and the second space (S2) in which the stator is not accommodated are aligned in the axial direction, extending in a direction perpendicular to the rotation axis. a partitioning space divider (370);
with
A rotating electrical machine, wherein one of a first space and a second space is provided with a power busbar, and the other is provided with a neutral point busbar.

<Construction group B>
A motor such as an axial gap type motor is concerned about a decrease in energy efficiency. In view of this, a rotating electrical machine capable of improving energy efficiency is provided.

According to feature B1, the magnetic flux generated by the pair of peripheral magnets (311a, 311b) and the pair of inner shaft magnets (312a, 312b) concentrates on the stator (200) side, so that the magnetic field on the stator (200) side becomes tend to be strong. Therefore, the energy efficiency of the rotating electrical machine (60) can be enhanced.

[Feature B1]
A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having multi-phase coils (211);
Rotors (300, 300a, 300b) that rotate about a rotation axis (Cm) and are aligned with the stator in an axial direction (AD) in which the rotation axis extends;
with
The rotor is
It has a plurality of magnets (310, 311a, 311b, 312a, 312b, 313a, 313b) arranged in the circumferential direction (CD) of the rotation axis,
For multiple magnets,
a pair of inner magnets (312a, 312b) adjacent in the circumferential direction and oriented obliquely with respect to the axis of rotation so as to face the stator in the axial direction;
a pair of circumferential magnets (311a, 311b) adjacent to each other in the circumferential direction via a pair of inner magnets and oriented so as to face each other in the circumferential direction;
A rotating electrical machine that contains a

[Feature B2]
The rotating electric machine according to feature B1, wherein the pair of inner magnets are oriented so as to face the stator side in the axial direction and face each other in the circumferential direction so as to be inclined in the circumferential direction with respect to the rotation axis.

[Feature B3]
For multiple magnets,
includes a pair of outer magnets (313a, 313b) that are provided on opposite sides of the pair of inner magnets in the circumferential direction via the circumferential magnets and that are adjacent in the circumferential direction,
The pair of outer shaft magnets are oriented circumferentially inclined with respect to the axis of rotation so as to face axially opposite to the stator and circumferentially opposite to each other. Rotating electric machine described.

[Feature B4]
The rotors are arranged in pairs in the axial direction via the rotors,
One rotor (300a) has a pair of inner magnets and the other rotor (300b) has a pair of outer magnets arranged in the axial direction, and is symmetrical with respect to the other rotor. The rotating electric machine according to feature B3.

[Feature B5]
The magnet forms a magnet inclined surface (316d) inclined with respect to the axis of rotation,
The rotor is
a magnet holder (320) axially superimposed on the magnet from one side;
It has an inclined support surface (330a) inclined with respect to the axis of rotation, and the magnet is placed in the magnet holder such that the inclined support surface overlaps the inclined magnet surface and the magnet is sandwiched between the inclined support surface and the magnet holder. a fixed support (330) fixed to the
The rotating electric machine according to any one of features B1 to B4, having:

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

[Feature B7]
a shaft (340) having a shaft flange (342) axially aligned with and fixed to the rotor for rotation therewith about an axis of rotation;
The fulcrum of the rotor by the shaft flange ( a pressing member (350) applying a pressing force (F3) to the rotor on the side opposite the magnet via 344a);
The rotating electric machine according to any one of features B1 to B6, comprising:

[Feature B8]
the pressing member is a fixture (350) that secures the rotor to the shaft flange;
The rotary electric machine according to feature B7, wherein the portion (325) to which the pressing member is fixed in the rotor and the portion (345) to which the pressing member is fixed in the shaft flange are separated in the axial direction.

[Feature B9]
a first rotor (300a) which is a rotor;
a second rotor (300b) which is a rotor and is axially aligned with the first rotor via the stator;
a shaft flange (342) disposed axially between the first and second rotors and rotating with the first and second rotors about an axis of rotation;
a first rotor hole (325a) provided in the first rotor and extending in the axial direction;
a second rotor hole (325b) provided in the second rotor at a position circumferentially spaced apart from the first rotor hole and extending in the axial direction;
a first shaft hole (345a) provided in the shaft flange at a position axially aligned with the first rotor hole and extending in the axial direction;
a second shaft hole (345b) provided in the shaft flange at a position axially aligned with the second rotor hole and extending in the axial direction;
with
A first fixture (350a) for fixing the first rotor to the shaft flange is inserted into the first rotor hole and the first shaft hole,
The rotary electric machine according to any one of features B1 to B8, wherein a second fixture (350b) for fixing the second rotor to the shaft flange is inserted into the second rotor hole and the second shaft hole.

<Constituent group C>
Motors such as axial gap motors are concerned about insufficient heat radiation effect. In view of this, the present invention provides a rotating electric machine capable of enhancing the heat radiation effect.

According to feature C1, the coil protection part (250) is provided in a state of being superimposed on the inner peripheral surface (70b) of the electric machine housing (70). In this configuration, the heat of the coil (211) is easily transferred to the electric machine housing (70) through the coil protection portion (250). Moreover, since the outer peripheral surface (70a) of the electric machine housing (70) is provided with heat radiation fins (72), the heat transferred from the coil protection part (250) to the electric machine housing (70) is dissipated by the heat radiation fins (72). It is easily released to the outside. Therefore, the heat dissipation effect of the rotating electric machine (60) can be enhanced.

[Feature C1]
A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having multi-phase coils (211);
Rotors (300, 300a, 300b) that rotate about a rotation axis (Cm) and are aligned with the stator in an axial direction (AD) in which the rotation axis extends;
an electrical machine housing (70) containing the stator and rotor;
a heat radiating fin (72) provided on the outer peripheral surface (70a) of the electrical housing to radiate heat;
with
The stator
A rotary electric machine having a coil protection part (250) provided in a state of being superimposed on an inner peripheral surface (70b) of an electric machine housing, having thermal conductivity, and protecting a coil.

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

[Feature C3]
the plurality of projections includes a plurality of axial projections (174) extending axially and aligned in a circumferential direction (CD) of the axis of rotation;
The coil is formed of a plurality of coil portions (215) arranged in a circumferential direction and having a coil wire (220) wound thereon,
The rotating electrical machine according to feature C2, wherein the coil portion is provided at a position facing the shaft protrusion in the radial direction (RD) of the rotation axis.

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

[Feature C5]
Features C1 to C4, comprising a lead wire protector (255) that protects a coil lead wire (212) drawn out from the coil through the coil protector and fills a gap between the coil lead wire and the coil protector. The rotary electric machine according to any one of the above.

[Feature C6]
The stator
A bobbin (240) which is protected together with the coil by the coil protection part, emits heat to the coil protection part, has electrical insulation, and is wound with the coil (240), having any one of the features C1 to C5 Rotating electric machine described.

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

[Feature C8]
The stator
Feature C6 having a core (231) located inside the bobbin and having a width in the circumferential direction (CD) of the axis of rotation that gradually decreases radially inward (RD) of the axis of rotation. Or the rotary electric machine according to C7.

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

<Constituent group D>
In motors such as axial gap motors, there is concern that the heat dissipation effect of the motor may be insufficient. As for the motor, it is conceivable to form a unit by providing the motor integrally with the inverter. As for this unit, it is considered that the heat dissipation effect of the unit tends to be insufficient due to heat from the inverter. On the other hand, a rotary electric machine unit is provided that can achieve both miniaturization and improved heat radiation effect.

According to the feature D1, the power converter (81), the rotors (300, 300a, 300b) and the stator (200) arranged in the axial direction (AD) are housed in the unit housing (51). With this configuration, it is possible to reduce the size of the rotary electric machine unit (50) while making the rotary electric machine (60) thinner. Moreover, since the heat radiation fins (72, 92) are provided on the outer peripheral surfaces (70a, 90a) of the unit housing (51), the heat radiation effect of the rotary electric machine unit (50) can be enhanced by the heat radiation fins (72, 92). can be done. Therefore, both miniaturization of the rotary electric machine unit (50) and improvement of the heat radiation effect can be achieved.

[Feature D1]
A rotating electric machine unit (50) driven by supply of electric power,
A rotating electrical machine (60) having rotors (300, 300a, 300b) that rotate around a rotation axis (Cm) and a stator (200) that is aligned with the rotor in an axial direction (AD) in which the rotation axis extends; ,
a power conversion device (80) having a power conversion section (81) for converting power supplied to a rotating electric machine;
a unit housing (51) that forms both the outer peripheral surface (70a) of the rotating electric machine and the outer peripheral surface (90a) of the power conversion device and accommodates the rotor, the stator, and the power conversion section;
radiating fins (72, 92) provided on the outer peripheral surface (70a, 90a) of the unit housing to radiate heat;
Rotating electric machine unit.

[Feature D2]
The stator
a coil (211) through which current flows;
a coil protection part (250) provided in a state of being superimposed on the inner peripheral surface (70b) of the unit housing, having thermal conductivity, and protecting the coil;
The rotary electric machine unit according to feature D1, having:

[Feature D3]
The rotating electric machine is
an electric machine housing (70) that is included in the unit housing, forms the outer peripheral surface of the rotating electric machine, and accommodates the rotor and the stator,
The power converter is
a device housing (90) that is included in the unit housing, forms an outer peripheral surface of the power conversion device, and accommodates the power conversion section;
The rotary electric machine unit according to feature D1 or D2, wherein in the unit housing, the electric machine housing and the device housing are axially aligned.

[Feature D4]
a shaft (340) having a shaft flange (342) axially aligned with and fixed to the rotor and rotating with the rotor about an axis of rotation;
Shaft flange is
an annular portion (344) disposed inside the stator in the radial direction (RD) of the axis of rotation and extending annularly along the stator in the circumferential direction (CD) of the axis of rotation;
a flange vent (345) extending radially through the annulus to permit radial venting;
The rotary electric machine unit according to any one of features D1 to D3, having:

[Feature D5]
a balance adjustment hole (326) provided in the rotor for adjusting the balance of the rotor;
1. Any one of features D1-D4, wherein the balancing holes extend axially through the rotor and are provided inside the stator in the radial direction (RD) of the axis of rotation to allow airflow in the axial direction. The rotary electric machine unit according to 1.

[Feature D6]
a housing partition (370, 424) that partitions the interior of the unit housing into a rotary electric machine side and a power converter side in the axial direction;
a plurality of state detection units (421, 431) that detect the state of the rotating electric machine;
a wiring consolidation unit (440) that consolidates the detection wirings (426, 436) that are provided on the power converter side of the housing partition and are electrically connected to each of the plurality of state detection units;
The rotating electric machine unit according to any one of features D1-D5, comprising:

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

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

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

(Disclosure of technical ideas)
This specification discloses a plurality of technical ideas described in a plurality of sections listed below. Some paragraphs may be presented in a multiple dependent form in which subsequent paragraphs refer to the preceding paragraphs alternatively. Moreover, some terms may be written in a multiple dependent form referring to another multiple dependent form. These clauses written in multiple dependent form define multiple technical ideas.

(Technical idea 1)
A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having coils (211);
Rotors (300a, 300b) that rotate about a rotation axis (Cm) and are aligned with the stator in an axial direction (AD) in which the rotation axis extends;
an electric machine case (550) having an electric machine outer peripheral wall (551) extending in the axial direction and housing the stator and the rotor inside the electric machine outer wall;
Conductive bus bars (565, 615) electrically connected to the coil and fixed to the outer peripheral wall of the electric machine while extending along the inner wall surface (551b) of the outer peripheral wall of the electric machine in the circumferential direction (CD) of the rotation axis. )and,
A rotating electric machine.

According to the above aspect, the power bus bar is fixed to the outer peripheral wall of the electric machine extending in the axial direction. In this configuration, even if axial vibration occurs with the rotation of the rotor, the electric bus bar is also less likely to vibrate due to the fact that the outer peripheral wall of the electric machine is less likely to vibrate in the axial direction. Therefore, in the current-carrying bus bar, the outer peripheral wall of the electric machine increases the resistance to vibration in the axial direction. Moreover, the conducting bus bar extends in the circumferential direction along the inner wall surface of the outer peripheral wall of the electric machine. For this reason, the vibration resistance of the outer peripheral wall of the electric machine is imparted to the entire circumferential direction of the current-carrying bus bar. In this way, by using the outer peripheral wall of the electric machine, the vibration resistance of the current-carrying bus bar can be improved over a wide range. Therefore, it is possible to improve the reliability of the rotating electric machine against vibration.

(Technical idea 2)
The rotary electric machine according to Technical Thought 1, wherein the conducting bus bar is provided at a position separated from the coil in the axial direction.

(Technical idea 3)
3. The rotary electric machine according to technical idea 1 or 2, wherein the current-carrying bus bar is provided on the opposite side of the coil via the rotor in the axial direction.

(Technical idea 4)
a bearing (360) that rotatably supports the rotor;
a bearing support portion (552) provided on the opposite side of the coil via the rotor in the axial direction, extending from the outer peripheral wall of the electric machine, and supporting the bearing portion;
with
4. The rotating electric machine according to any one of technical ideas 1 to 3, wherein the conducting bus bar is provided at a position away from the bearing support portion.

(Technical idea 5)
The rotary electric machine according to Technical Thought 4, further comprising an inner bus bar (565) provided between the coil and the bearing support portion in the axial direction as the conducting bus bar.

(Technical idea 6)
6. The rotary electric machine according to technical idea 4 or 5, further comprising, as the conducting bus bar, an outer bus bar (615) provided on the opposite side of the coil in the axial direction via the bearing support portion.

(Technical idea 7)
Technical idea 4, comprising a bus bar connecting portion (580, 581) connecting a coil lead wire (212) drawn out from the coil and the conducting bus bar and provided at a position away from the bearing support portion 7. The rotary electric machine according to any one of 1 to 6.

(Technical idea 8)
an electric machine cover portion (552) extending in a direction orthogonal to the axial direction and covering, from the axial direction, a housing space (550a) containing the stator and the rotor inside the outer peripheral wall of the electric machine;
a ventilation hole (373) provided at a position spaced inwardly from the ventilation hole in the radial direction (RD) of the rotation axis in the electrical machine cover portion for ventilating the accommodation space;
The rotary electric machine according to any one of technical ideas 1 to 7, comprising:

(Technical idea 9)
according to any one of technical ideas 1 to 8, wherein the conducting busbar has a busbar plate surface (566) extending in the axial direction, and the busbar plate surface is provided so as to overlap the inner wall surface; Rotating electric machine described.

(Technical idea 10)
The rotary electric machine according to Technical Thought 9, wherein a plurality of the current-carrying busbars are laminated in the radial direction so that the respective busbar plate surfaces overlap each other.

(Technical idea 11)
a heat dissipation promoting part (72, 602) provided on the outer peripheral wall of the electric machine for promoting heat dissipation from the inner space (550a) of the outer peripheral wall of the electric machine,
11. The rotary electric machine according to any one of technical ideas 1 to 10, wherein the current-carrying busbars are arranged in the heat radiation promoting portion at positions aligned in the radial direction of the rotation axis.

(Technical idea 12)
12. The rotary electric machine according to any one of technical ideas 1 to 11, which is provided in an aircraft and driven to fly the aircraft.

<Construction group A>
60... Motor device as rotary electric machine 65... Neutral point 81... Inverter as power converter 200... Stator 211... Coil 215... Coil part 220... Coil wire 223... Wire 261... Power Bus bar 270 Bus bar protection section 280 Relay terminal as relay bus bar 285 Terminal block as terminal block 290 Neutral point bus bar 300 Rotor 300 a First rotor as rotor 300 b Rotor 360... First bearing as bearing 370... Space partition, rear frame as support frame and orthogonal frame, 371... Busbar support part, 372... Bearing support part, 421... Resolver as rotation detection part , S1 .

<Construction group B>
60... Motor device as rotary electric machine 200... Stator 211... Coil 300... Rotor 300a... First rotor as rotor 300b... Second rotor as rotor 310... Magnet 311a... As magnet and peripheral magnet 311b... second peripheral magnet as a magnet and a peripheral magnet, 312a... first inner magnet as a magnet and an inner magnet, 312b... second inner magnet as a magnet and an inner magnet, 313a ... first outer magnet as magnet and outer magnet, 313b... second outer magnet as magnet and outer magnet, 316... magnet unit, 317... inclined magnet unit as magnet unit, 318... magnet unit Parallel magnet unit 316c Unit side surface 316d Inner peripheral tapered surface as magnet inclined surface 320 Magnet holder 325 Holder fixing hole as part 325a First holder fixing hole as first rotor hole 325b Second holder fixing hole as second rotor hole 330 Fixing block as fixing support portion 330a Block tapered surface as support inclined surface 340 Shaft 342 Shaft flange 344a Rim tip as fulcrum Part 345... Flange hole as a part 345a... First flange hole as a first shaft hole 345b... Second flange hole as a second shaft hole 350... Holder fixture as a pressing member 350a... First First holder fixture as fixture, 350b... Second holder fixture as second fixture, F1... Suction force, F2... Bending stress, F3... Pressing force, Cm... Motor axis line as rotation axis, AD... Axial direction, CD: circumferential direction, RD: radial direction.

<Constituent group C>
60... Motor device as a rotating electric machine 70... Motor housing as an electric machine housing 70a... Outer peripheral surface 70b... Inner peripheral surface 72... Motor fins as radiation fins 171... Stator holding portions as convex portions 172... First peripheral holding portion as a convex portion 173... Second peripheral holding portion as a convex portion 174... Shaft holding portion as a convex portion and a shaft convex portion 176... Housing base surface 177... Housing rough surface 200... Stator 211... Coil 212... Power lead wire as coil lead wire 215... Coil part 220... Coil wire 231... Core 240... Bobbin 241... Bobbin body part 241a... Outer peripheral surface 242... Bobbin flange , 243 Flange inner plate surface as flange surface 243a Flange concave portion 246 Bobbin base surface 247 Bobbin rough surface 250 Coil protection portion 255 Grommet as lead wire protection portion 300 Rotor 300a A first rotor as a rotor, 300b... A second rotor as a rotor, 310... Magnet, Cm... A motor axis as a rotation axis, AD... Axial direction, CD... Circumferential direction, RD... Radial direction.

<Constituent group D>
50 Motor device unit as rotating electric machine unit 51 Unit housing 53 Reduction gear as cover fixing target 60 Motor device as rotating electric machine 70 Motor housing as electric machine housing 71 Housing body 70a Outer peripheral surface 70b Inner peripheral surface 72 Motor fins as heat radiating fins 74 Connection flanges as electrical machine flanges 74a Flange holes as electrical machine fixing holes 80 Inverter device as power converter 81 Inverter as a power conversion unit 90... Device housing and inverter housing as housing fixing target 90a... Outer peripheral surface 92... Inverter fin 178... Fixed flange as electric machine flange 178a... Flange hole as electric machine fixing hole 200 Stator 211 Coil 212 Power lead wire as coil lead wire 250 Coil protector 300 Rotor 300 a First rotor as rotor 300 b Second rotor as rotor 326 Balance adjustment Holder adjustment holes as holes 340 Shaft 342 Shaft flange 344 Rim as annular portion 345 Flange ventilation hole 370 Rear frame as housing partition 373 Frame opening as partition opening , 380 . Resolver as state detection unit 424 Resolver cover as housing partition 426 Signal wiring as detection wiring 431 Temperature sensor as state detection unit 436 Signal wiring as detection wiring 440 Wiring aggregation A signal terminal block as a part, Cm... A motor axis line as a rotation axis line, AD... Axial direction, CD... Circumferential direction, RD... Radial direction.

<Constituent group P>
60... Motor device as rotary electric machine, 72... Motor fin as heat dissipation promoting part, 200... Stator, 211... Coil, 212... Electric power lead as coil lead, 300a... First rotor as rotor, 300b... Rotor 360... First bearing as bearing portion 373... Frame opening as ventilation hole 550... Motor case as electric machine case 550a... Motor space as housing space and inner space 551... Electric machine Motor outer peripheral wall as outer peripheral wall, 551b... Motor inner wall surface as inner wall surface, 552... First facing wall as bearing support part and electric machine cover part, 565... Wall electric power bus bar as current bus bar and inner bus bar, 566... Bus bar Plate surface 580 Conductive joints as busbar connection parts 581 Joining intermediate parts as busbar connection parts 602 Refrigerant flow paths as heat dissipation promoting parts 615 Outer power busbars as current busbars and outside busbars, Cm . . motor axis as rotation axis, AD .. axial direction, CD .

Claims (12)

A rotating electrical machine (60) driven by supply of electric power,
a stator (200) having coils (211);
Rotors (300a, 300b) that rotate about a rotation axis (Cm) and are aligned with the stator in an axial direction (AD) in which the rotation axis extends;
an electric machine case (550) having an electric machine outer peripheral wall (551) extending in the axial direction and housing the stator and the rotor inside the electric machine outer wall;
Conductive bus bars (565, 615) electrically connected to the coil and fixed to the outer peripheral wall of the electric machine while extending along the inner wall surface (551b) of the outer peripheral wall of the electric machine in the circumferential direction (CD) of the rotation axis. )and,
A rotating electric machine. The rotating electric machine according to claim 1, wherein said conducting bus bar is provided at a position separated from said coil in said axial direction. The rotary electric machine according to claim 1 or 2, wherein said current-carrying bus bar is provided on the opposite side of said coil via said rotor in said axial direction. a bearing (360) that rotatably supports the rotor;
a bearing support portion (552) provided on the opposite side of the coil via the rotor in the axial direction, extending from the outer peripheral wall of the electric machine, and supporting the bearing portion;
with
3. The electric rotating machine according to claim 1, wherein said conducting bus bar is provided at a position distant from said bearing support portion. The rotary electric machine according to claim 4, further comprising an inner bus bar (565) provided between the coil and the bearing support portion in the axial direction as the conducting bus bar. The rotary electric machine according to claim 4, further comprising an outer bus bar (615) provided on the side opposite to the coil with respect to the axial direction via the bearing support portion, as the conducting bus bar. 5. The busbar connecting portion (580, 581) connecting the coil lead wire (212) drawn out from the coil and the conducting busbar and provided at a position away from the bearing support portion. Rotating electric machine described. an electric machine cover portion (552) extending in a direction orthogonal to the axial direction and covering, from the axial direction, a housing space (550a) containing the stator and the rotor inside the outer peripheral wall of the electric machine;
a ventilation hole (373) provided at a position spaced inwardly from the conducting bus bar in the radial direction (RD) of the rotation axis in the electrical machine cover portion for ventilating the accommodation space;
The rotating electric machine according to claim 1 or 2, comprising: 3. The electric rotating machine according to claim 1, wherein said conducting busbar has a busbar plate surface (566) extending in said axial direction, said busbar plate surface being provided so as to overlap said inner wall surface. 10. The rotating electric machine according to claim 9, wherein a plurality of said conducting busbars are laminated in a radial direction (RD) of said rotation axis such that said busbar plate surfaces of said busbar plate surfaces overlap each other. a heat dissipation promoting part (72, 602) provided on the outer peripheral wall of the electric machine for promoting heat dissipation from the inner space (550a) of the outer peripheral wall of the electric machine,
The electric rotating machine according to claim 1 or 2, wherein the current-carrying bus bar is provided at a position aligned in the radial direction (RD) of the rotation axis in the heat dissipation promoting portion. 3. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is provided in an aircraft and driven to fly the aircraft.

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