JP2017189020A - Rotary electric machine stator and rotary electric machine having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine stator and a rotary electric machine having the same, having a suppressed height of a coil end while avoiding interference between adjacent conductors at the coil end of a stator coil.SOLUTION: The rotary electric machine stator includes a stator core having a plurality of slots, and stator coils inserted in the slots. The stator further includes: a flat part 250 which is in parallel to a stator core end face at the top of a part protruding from the stator core end face of the stator coil; one kind of an intermediate part 251 on one side of the intermediate parts 251 in coil intermediate parts 251 at both ends on the plane part 250 and the stator core end face; and two kinds of intermediate parts 252, 253 on the other side of the intermediate parts.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a stator of a rotating electric machine such as a motor or a generator, and a rotating electric machine including the same.

  As a background art of this technical field, there is JP 2011-234482 A (Patent Document 1). This publication provides “a stator for a rotating electrical machine that is capable of reducing the damage to the insulation film of the conductors constituting the stator coil while suppressing the increase in the coil end of the stator coil. The turn portion is spaced from the first slot by a protruding portion protruding from the first slot in a direction parallel to the axial direction of the stator core and a first bent portion bent in the circumferential direction from the tip of the protruding portion ( A slope portion extending obliquely at an angle of less than 90 degrees toward the k-th slot (the other slot) apart by one magnetic pole pitch, and the k-th portion bent from the tip of the slope portion in a direction parallel to the axial direction of the stator core. The second bent portion connected to the slot accommodating portion accommodated in the slot. Thereby, the turn portion has two bent portions formed in an asymmetric shape in the circumferential direction. (See summary .

JP 2011-234482 A

  However, in the technique disclosed in Patent Document 1, when the wire diameter of the stator coil increases, adjacent coils tend to interfere with each other when shifting from the first slot to the second slot. In order to avoid interference, it is necessary to bend many conductors at the time of slot transition, but there is a possibility that the insulating coating covering the coil surface is likely to be damaged. When the insulating coating is made thicker as a countermeasure, there is a problem that the conductor space factor in the slot is reduced, the efficiency is lowered, and it is difficult to reduce the coil end due to interference between adjacent conductors.

  Therefore, an object of the present invention is to provide a stator for a rotating electrical machine in which the height of the coil end is suppressed while avoiding interference between adjacent conductors at the coil end of the stator coil, and a rotating electrical machine including the stator. .

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

  The present application includes a plurality of means for solving the above-mentioned problems. For example, a stator of a rotating electrical machine including a stator core having a plurality of slots and a stator coil inserted into the slots. A coil having a flat portion parallel to the end surface of the stator core at the apex of a portion protruding from the end surface of the stator core of the stator coil, and located at both ends of the flat portion and the end surface of the stator core The intermediate portion is characterized in that one intermediate portion has one kind of intermediate portion and the other intermediate portion has two kinds of intermediate portions.

  ADVANTAGE OF THE INVENTION According to this invention, the stator of a rotary electric machine provided with the stator coil with high cooling property, and the rotary electric machine provided with this can be provided, suppressing the axial direction height of a non-connection side coil end. . Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

The schematic block diagram of the hybrid electric vehicle carrying the rotary electric machine of this embodiment. The circuit diagram of the power converter device 600. FIG. Sectional drawing of the rotary electric machine of this embodiment. R-θ sectional view of stator 230 and rotor 250 of this embodiment. The perspective view seen from the anti-connection side coil end 242 of the stator 230 of this embodiment. Schematic which expanded the r-theta cross section of 1 slot of the stator 230 of this embodiment. The figure which looked at the segment coil 243 before assembling | attaching to the stator core 232 of this embodiment from the stator core inner peripheral side. The figure which looked at the anti-connection side coil end 241 of the stator 230 of this embodiment from the outer peripheral side. The figure which looked at the anti-connection side coil end 241 of the stator 230 of this embodiment from the inner peripheral side.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  In this embodiment, for example, it is suitable as a driving motor for an electric vehicle. The rotating electrical machine according to the present invention can be applied to a pure electric vehicle that runs only by the rotating electrical machine and a hybrid type electric vehicle that is driven by both the engine and the rotating electrical machine. Hereinafter, a hybrid type electric vehicle is taken as an example. explain.

  FIG. 1 is a diagram showing a schematic configuration of a hybrid electric vehicle equipped with a rotating electrical machine according to an embodiment of the present invention. The vehicle 100 is mounted with an engine 120, a first rotating electrical machine 200, a second rotating electrical machine 202, and a battery 180. The battery 180 supplies DC power to the rotating electrical machines 200 and 202 via the power converter 600 when the driving force by the rotating electrical machines 200 and 202 is required, and receives DC power from the rotating electrical machines 200 and 202 during regenerative travel. . Transfer of direct-current power between the battery 180 and the rotating electrical machines 200 and 202 is performed via the power converter 600. Although not shown, the vehicle is equipped with a battery that supplies low-voltage power (for example, 14 volt system power) and supplies DC power to a control circuit described below.

  Rotational torque generated by engine 120 and rotating electrical machines 200 and 202 is transmitted to front wheel 110 via transmission 130 and differential gear 160. The transmission 130 is controlled by a transmission control device 134, and the engine 120 is controlled by an engine control device 124. The battery 180 is controlled by the battery control device 184. Transmission control device 134, engine control device 124, battery control device 184, power conversion device 600 and integrated control device 170 are connected by communication line 174.

  The integrated control device 170 is a higher-level control device than the transmission control device 134, the engine control device 124, the power conversion device 600, and the battery control device 184, and the transmission control device 134, the engine control device 124, and the power conversion device 600. And information representing each state of the battery control device 184 is received from each of them via the communication line 174. The integrated control device 170 calculates a control command for each control device based on the acquired information. The calculated control command is transmitted to each control device via the communication line 174.

  The high voltage battery 180 is formed of a secondary battery such as a lithium ion battery or a nickel metal hydride battery, and outputs a high voltage DC power of 250 volts to 600 volts or more. The battery control device 184 outputs the charge / discharge status of the battery 180 and the state of each unit cell battery constituting the battery 180 to the integrated control device 170 via the communication line 174.

  When integrated control device 170 determines that charging of battery 180 is necessary based on information from battery control device 184, integrated control device 170 issues an instruction for power generation operation to power conversion device 600. The integrated control device 170 mainly manages the output torque of the engine 120 and the rotating electrical machines 200 and 202, and calculates the total torque and torque distribution ratio between the output torque of the engine 120 and the output torque of the rotating electrical machines 200 and 202. And a control command based on the calculation processing result is transmitted to the transmission control device 134, the engine control device 124, and the power conversion device 600. Based on the torque command from the integrated control device 170, the power conversion device 600 controls the rotating electrical machines 200 and 202 so that torque output or generated power is generated as commanded.

  The power converter 600 is provided with a power semiconductor that constitutes an inverter for operating the rotating electrical machines 200 and 202. The power conversion device 600 controls the switching operation of the power semiconductor based on a command from the integrated control device 170. By the switching operation of the power semiconductor, the rotary electric machines 200 and 202 are operated as an electric motor or a generator.

When the rotary electric machines 200 and 202 are operated as an electric motor, DC power from the high-voltage battery 180 is supplied to the DC terminal of the inverter of the power conversion device 600. The power conversion device 600 converts the DC power supplied by controlling the switching operation of the power semiconductor into three-phase AC power, and supplies it to the rotating electrical machines 200 and 202. On the other hand, when the rotating electrical machines 200 and 202 are operated as a generator, the rotors of the rotating electrical machines 200 and 202 are rotationally driven with a rotational torque applied from the outside, and the stator windings of the rotating electrical machines 200 and 202 are three-phased. AC power is generated. The generated three-phase AC power is converted into DC power by the power converter 600, and the DC power is supplied to the high-voltage battery 180, whereby the battery 180 is charged.
FIG. 2 shows a circuit diagram of the power converter 600 of FIG. The power conversion device 600 is provided with a first inverter device for the rotating electrical machine 200 and a second inverter device for the rotating electrical machine 202. The first inverter device includes a power module 610, a first drive circuit 652 that controls the switching operation of each power semiconductor 21 of the power module 610, and a current sensor 660 that detects the current of the rotating electrical machine 200. . The drive circuit 652 is provided on the drive circuit board 650.

  On the other hand, the second inverter device includes a power module 620, a second drive circuit 656 that controls the switching operation of each power semiconductor 21 in the power module 620, and a current sensor 662 that detects the current of the rotating electrical machine 202. ing. The drive circuit 656 is provided on the drive circuit board 654. The control circuit 648 provided on the control circuit board 646, the capacitor module 630, and the transmission / reception circuit 644 mounted on the connector board 642 are commonly used by the first inverter device and the second inverter device.

  The power modules 610 and 620 operate according to drive signals output from the corresponding drive circuits 652 and 656, respectively. Each of the power modules 610 and 620 converts DC power supplied from the battery 180 into three-phase AC power and supplies the power to stator windings that are armature windings of the corresponding rotating electric machines 200 and 202. Further, the power modules 610 and 620 convert AC power induced in the stator windings of the rotating electric machines 200 and 202 into DC and supply it to the high voltage battery 180.

  The power modules 610 and 620 include a three-phase bridge circuit as shown in FIG. 2, and series circuits corresponding to the three phases are electrically connected in parallel between the positive electrode side and the negative electrode side of the battery 180, respectively. ing. Each series circuit includes a power semiconductor 21 constituting an upper arm and a power semiconductor 21 constituting a lower arm, and these power semiconductors 21 are connected in series. The power module 610 and the power module 620 have substantially the same circuit configuration as shown in FIG. 2, and the power module 610 will be described as a representative here.

  In the present embodiment, an IGBT (insulated gate bipolar transistor) 21 is used as a switching power semiconductor element. The IGBT 21 includes three electrodes, a collector electrode, an emitter electrode, and a gate electrode. A diode 38 is electrically connected between the collector electrode and the emitter electrode of the IGBT 21. The diode 38 includes two electrodes, a cathode electrode and an anode electrode. The cathode electrode is the collector electrode of the IGBT 21 and the anode electrode is the IGBT 21 so that the direction from the emitter electrode to the collector electrode of the IGBT 21 is the forward direction. Each is electrically connected to the emitter electrode.

  A MOSFET (metal oxide semiconductor field effect transistor) may be used as the switching power semiconductor element. The MOSFET includes three electrodes, a drain electrode, a source electrode, and a gate electrode. In the case of a MOSFET, a parasitic diode whose forward direction is from the drain electrode to the source electrode is provided between the source electrode and the drain electrode, so there is no need to provide the diode 38 of FIG.

  Each phase arm is configured by electrically connecting the emitter electrode of the IGBT 21 and the collector electrode of the IGBT 21 in series. In the present embodiment, only one IGBT of each upper and lower arm of each phase is shown, but since the current capacity to be controlled is large, a plurality of IGBTs are actually electrically connected in parallel. ing. Below, in order to simplify description, it demonstrates as one power semiconductor.

  In the example shown in FIG. 2, each upper and lower arm of each phase is composed of three IGBTs. The collector electrode of the IGBT 21 of each upper arm of each phase is electrically connected to the positive electrode side of the battery 180, and the source electrode of the IGBT 21 of each lower arm of each phase is electrically connected to the negative electrode side of the battery 180. The middle point of each arm of each phase (the connection portion between the emitter electrode of the upper arm side IGBT and the collector electrode of the IGBT on the lower arm side) is the armature winding (fixed) of the corresponding phase of the corresponding rotating electric machine 200, 202. Is electrically connected to the secondary winding.

  The drive circuits 652 and 656 constitute a drive unit for controlling the corresponding inverter devices 610 and 620, and generate a drive signal for driving the IGBT 21 based on the control signal output from the control circuit 648. To do. The drive signals generated by the drive circuits 652 and 656 are output to the gates of the power semiconductor elements of the corresponding power modules 610 and 620, respectively. Each of the drive circuits 652 and 656 is provided with six integrated circuits that generate drive signals to be supplied to the gates of the upper and lower arms of each phase, and the six integrated circuits are configured as one block.

  The control circuit 648 constitutes a control unit of each of the inverter devices 610 and 620, and is constituted by a microcomputer that calculates a control signal (control value) for operating (turning on / off) a plurality of switching power semiconductor elements. ing. The control circuit 648 receives a torque command signal (torque command value) from the host controller, sensor outputs of the current sensors 660 and 662, and sensor outputs of the rotation sensors mounted on the rotating electrical machines 200 and 202. The control circuit 648 calculates a control value based on these input signals and outputs a control signal for controlling the switching timing to the drive circuits 652 and 656.

  The transmission / reception circuit 644 mounted on the connector board 642 is for electrically connecting the power conversion apparatus 600 and an external control apparatus, and communicates information with other apparatuses via the communication line 174 in FIG. Send and receive. Capacitor module 630 constitutes a smoothing circuit for suppressing fluctuations in the DC voltage caused by the switching operation of IGBT 21, and is electrically connected to the DC side terminal of first power module 610 or second power module 620. Connected in parallel.

  FIG. 3 shows an rZ sectional view of the rotating electrical machine 200 of FIG. The rotating electrical machine 200 and the rotating electrical machine 202 have substantially the same structure, and the structure of the rotating electrical machine 200 will be described below as a representative example. However, the structure shown below does not need to be employed in both the rotating electrical machines 200 and 202, and may be employed in only one of them.

  A stator 230 is held inside the housing 212, and the stator 230 includes a stator core 232 and a stator winding 238. A rotor 280 is rotatably held on the inner peripheral side of the stator core 232 through a gap 222. The rotor 280 includes a rotor core 282 fixed to the shaft 218, a permanent magnet 284, and a non-magnetic contact plate 226. The housing 212 has a pair of end brackets 214 provided with bearings 216, and the shaft 218 is rotatably held by these bearings 216.

  The shaft 218 is provided with a resolver 224 that detects the position and rotation speed of the pole of the rotor 280. The output from the resolver 224 is taken into the control circuit 648 shown in FIG. The control circuit 648 outputs a control signal to the drive circuit 652 based on the fetched output. The drive circuit 652 outputs a drive signal based on the control signal to the power module 610. The power module 610 performs a switching operation based on the control signal, and converts DC power supplied from the battery 180 into three-phase AC power. This three-phase AC power is supplied to the stator winding 238 shown in FIG. 3 and a rotating magnetic field is generated in the stator 230. The frequency of the three-phase alternating current is controlled based on the output value of the resolver 224, and the phase of the three-phase alternating current with respect to the rotor 280 is also controlled based on the output value of the resolver 224.

  FIG. 4 is a view showing the r-θ cross section of the stator 230 and the rotor 280, and shows the AA cross section of FIG. In FIG. 4, the housing 212, the shaft 218, and the stator winding 238 are not shown. On the inner peripheral side of the stator core 232, a large number of slots 237 and teeth 236 are arranged uniformly over the entire circumference. In FIG. 4, all slots and teeth are not labeled, and only some teeth and slots are represented by symbols. A slot insulating material (not shown) is provided in the slot 237, and a plurality of U-phase, V-phase, and W-phase windings constituting the stator winding 238 shown in FIG. In the present embodiment, since the number of slots per phase per pole is 2, 72 slots 237 are formed at equal intervals. The number of slots per phase per pole is two for the U phase, V phase, and W phase of each slot 237 in the θ direction: U phase, U phase, V phase, V phase, W phase, W phase,. This means that the phases are arranged so that they are lined up one by one, and six slots 237 are used in one pole U phase, V phase, and W phase. In this embodiment, since 12 permanent magnets 284 described later are 12 poles arranged in the θ direction, the number of slots 237 of the stator core 232 is 72 of 6 × 12.

  Near the outer periphery of the rotor core 282, twelve holes 283 for inserting rectangular magnets are arranged at equal intervals along the θ direction. Each hole 283 is formed along the z direction, and a permanent magnet 284 is embedded in each hole 283 and fixed with an adhesive or the like. The width of the hole 283 in the θ direction is set to be larger than the width of the permanent magnet 284 (284a, 284b) in the θ direction, and the hole space 287 on both sides of the permanent magnet 284 functions as a magnetic gap. The hole space 287 may be embedded with an adhesive, or may be solidified integrally with the permanent magnet 284 with a molding resin. The permanent magnet 284 acts as a field pole of the rotor 280 and has a 12-pole configuration in this embodiment.

  The magnetization direction of the permanent magnet 284 is directed in the radial direction, and the direction of the magnetization direction is reversed for each field pole. That is, if the stator side surface of the permanent magnet 284a is N-pole and the surface on the shaft side is S-pole, the stator side surface of the adjacent permanent magnet 284b is S-pole and the surface on the shaft side is N-pole. . These permanent magnets 284a and 284b are alternately arranged in the θ direction.

  The permanent magnet 284 may be inserted into the hole 283 after being magnetized, or may be magnetized by applying a strong magnetic field after being inserted into the hole 283 of the rotor core 282. However, since the magnetized permanent magnet 284 is a strong magnet, if the magnet is magnetized before fixing the permanent magnet 284 to the rotor 280, a strong attractive force between the rotor core 282 and the permanent magnet 284 is fixed. Occurs and hinders assembly work. Further, due to the strong attractive force of the permanent magnet 284, dust such as iron powder may adhere to the permanent magnet 284. Therefore, when considering the productivity of the rotating electrical machine, it is preferable that the permanent magnet 284 is magnetized after being inserted into the rotor core 282.

  The permanent magnet 284 can be a neodymium-based or samarium-based sintered magnet, a ferrite magnet, a neodymium-based bonded magnet, or the like. The residual magnetic flux density of the permanent magnet 284 is about 0.4 to 1.4T.

  When a rotating magnetic field is generated in the stator 230 by flowing a three-phase alternating current through the stator winding 238, the rotating magnetic field acts on the permanent magnets 284a and 284b of the rotor 280 to generate torque. This torque is represented by the product of the component interlinked with each phase winding of the magnetic flux generated from the permanent magnet 284 and the component orthogonal to the interlinkage magnetic flux of the alternating current flowing through each phase winding. Here, since the alternating current is controlled to be sinusoidal, the product of the fundamental wave component of the interlinkage magnetic flux and the fundamental wave component of the alternating current becomes the time-average component of the torque, and the harmonic component of the interlinkage magnetic flux The product of the fundamental wave components of the alternating current becomes the torque ripple that is the harmonic component of the torque. That is, in order to reduce the torque ripple, the harmonic component of the flux linkage may be reduced. In other words, since the product of the interlinkage magnetic flux and the angular velocity at which the rotor rotates is the induced voltage, reducing the harmonic component of the interlinkage magnetic flux is equivalent to reducing the harmonic component of the induced voltage.

  FIG. 5 is a perspective view of the stator 230. In the present embodiment, a plurality of substantially U-shaped segment coils 243 are used for the stator core 232, and the stator winding 238 is formed by wave winding in which the segment coil 243 is wound in a wave shape. On both end surfaces of the stator core 232, there are formed a connection side coil end 241 for connecting the terminal portion of the segment coil 243 and an anti-connection side coil end 242 formed by a U-shaped bottom portion of the segment coil 243. ing. In this embodiment, since there are 72 slots 237, 72 segment coils 243 are inserted in the circumferential direction. When the segment coils 243 inserted 72 in the circumferential direction are used as one winding group, in the present embodiment, when the first winding group is used from the innermost circumference of the stator core 232, the first winding group 242a is used. , A second winding group 242b, a third winding group 242c, and a fourth winding group 242d.

  FIG. 6 is an enlarged schematic view of the r-Θ cross section of one slot of the stator 230, and is a simplified diagram in which the slot insulating material provided between the stator core 232 and the segment coil 243 is omitted. As shown in FIG. 6, the segment coil 243 is arranged in the stator core 232 so as to form a plurality of layers. In this embodiment, it arrange | positions so that it may consist of a layer 1-a layer 8 sequentially from an inner peripheral side (lower figure figure) to r direction. The non-connection side coil end 242 is composed of four winding groups. The first winding group 242a is layer 1 and layer 2, the second winding group 242b is layer 3 and layer 4, and the third winding group. 242c is inserted in layers 5 and 6, and the fourth winding group 242d is inserted in layers 7 and 8. In this embodiment, a segment coil having a square cross section is used, but a segment coil having a round cross section may be used.

  FIG. 7 is a view of one of the segment coils 243 assembled to the stator core 232 as viewed from the inner periphery side of the stator core.

  The r-Θ cross section shown in FIG. 6 is a cross sectional view of the portion corresponding to the slot insertion portion shown in FIG.

  The segment coil 243 has a substantially U shape. For example, in the first winding group 242a, the slot insertion portion 244a is inserted into the layer 1 and the slot insertion portion 244b is inserted into the layer 2.

  Similarly, in the second winding group 242b, the slot insertion portion 244a is layer 3, the slot insertion portion 244b is layer 4, and in the third winding group 242c, the slot insertion portion 244a is layer 5, the slot insertion portion 244b is layer 6, In the winding group 242d, the slot insertion portion 244a is inserted into the layer 7 and the slot insertion portion 244b is inserted into the layer 8, the slot insertion portion 244a is inserted into the odd layer, and the slot insertion portion 244b is inserted into the even layer.

    In the substantially U-shaped portion of the coil end portion on the non-connection side of the segment coil 243, a flat portion 250 is provided at the vertex that is the bottom of the U-shape farthest from the end face of the stator core 232, and the flat portion The intermediate part between 250 and the slot insertion part 244a entering the odd layer is composed of one kind of intermediate part 251, and the intermediate part between the flat part 250 and the slot insertion part 244b entering the even layer is two kinds. The intermediate portions 252 and 253 of FIG.

  By adopting such a configuration, it is possible to suppress the height in the Z-direction of the anti-connection side coil end as compared with the segment coil in which only one kind of intermediate portion between the odd layer and the even layer is provided.

  FIG. 8A is a view of the non-connection side coil end 242 as seen from the outer periphery side, and FIG. 8B is a view as seen from the inner periphery side. In order to suppress the height in the z direction of the coil end 242 on the non-connection side, a flat portion 250 is provided, and an intermediate portion between the flat portion 250 and the stator core 232 has one type each of the even layer and the odd layer. Then, as shown by the dotted line 255, it interferes with the adjacent segment coil 243.

  Therefore, the intermediate part between the slot insertion part 244b that enters the even layer is the intermediate part 252 of the two kinds of intermediate parts 252 and 253, and the intermediate part 252 has an intermediate angle between the intermediate part 252 and the end face of the stator core 232. The intermediate portion 253 has an angle between the intermediate portion 253 and the end face of the stator core 232, and an angle between the intermediate portion 251 and the end face of the stator core end surface 232, which is larger than the angle between the portion 251 and the end face of the stator core end surface 232. By making it smaller, interference with the adjacent segment coil 243 can be avoided while suppressing the height in the z direction of the anti-connection side coil end 242.

  Further, by adopting such a configuration, when a plurality of segment coils 243 are arranged in the circumferential direction, the two types of intermediate portions 252 and 253 located between the plane portion 250 and the slot insertion portion 244b entering the even layer are provided. Has a space 254 so that one kind of intermediate portion 251 between the flat portion 250 of the adjacent segment coil 243 and the slot insertion portion 244a entering the odd layer can be seen.

  By providing the space in this way, for example, when using ATF direct cooling, which is one of the cooling methods, even when the non-connection side coil end composed of a plurality of winding groups is used, the winding is close to the inner peripheral side. ATF is easily applied to the segment coils of the wire group, and the cooling effect can be further enhanced. If the intermediate portion between the slot insertion portion 244a that enters the odd layer is also divided into two types as in the even layer, the adjacent segment coil 243 cannot be seen in the space 254, and the ATF penetrates. Therefore, when the ATF direct cooling is used, a higher cooling effect can be expected when one kind of intermediate portion between the slot insertion portion 244a entering the odd layer is used.

  Further, when two types of intermediate portions between the slot insertion portion 244a entering the odd layer and one type of intermediate portion between the slot insertion portion 244b entering the even layer are provided, the anti-connection side coil end 242 FIG. 8A viewed from the outer periphery and FIG. 8B viewed from the inner periphery are interchanged. In this case, the space 254 is eliminated on the outer peripheral side where the ATF is applied, so that the ATF is less likely to be applied to the inside of the coil end opposite to the connection side than the configuration of the present embodiment, and the cooling effect is reduced. Therefore, as in the present embodiment, one type of intermediate portion 251 is provided between the slot insertion portion 244a that enters the odd layer, and two types of intermediate portions 252 are provided between the slot insertion portion 244b that enters the even layer. By providing H.253, not only the anti-connection side coil end height is suppressed, but also an effect of enhancing the cooling effect can be expected.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

21 ... Power semiconductor or IGBT, 38 ... Diode, 100 ... Vehicle, 110 ... Front wheel, 120 ... Engine, 124 ... Engine control device, 130 ... Transmission, 134 ... Transmission control device, 160 ... Differential gear, 170 ... General control Device, 174 ... Communication line, 180 ... Battery, 184 ... Battery control device, 200 ... First rotating electrical machine, 202 ... Second rotating electrical machine, 212 ... Housing, 214 ... End bracket, 216 ... Bearing, 218 ... Shaft, 222 ... Air gap, 224 ... Resolver, 226 ... Address plate, 230 ... Stator, 232 ... Stator core, 236 ... Teeth, 237 ... Slot, 238 ... Stator winding, 241 ... Connection side coil end, 242 ... Anti-connection side coil End, 242a ... 1st winding group, 242b ... 2nd winding group, 242c ... 3rd winding group, 242d ... 4th winding group, 243 ... Segment coil, 244a ... Slot insertion part, 244b ... Slot insertion part , 250 ... plane part, 251 ... intermediate part, 252 ... intermediate part, 253 ... intermediate 280 ... rotor, 282 ... rotor core, 283 ... magnet insertion hole, 284 ... permanent magnet, 284a: permanent magnet (N pole), 284b: permanent magnet (S pole), 287: hole space on both sides of the magnet , 600 ... Power conversion device, 610 ... Power module of the first inverter device, 620 ... Power module of the second inverter device, 630 ... Capacitor module, 642 ... Connector board, 644 ... Transceiver circuit, 646 ... Control circuit board, 648 ... Control circuit, 650 ... Drive circuit board, 652 ... First drive circuit, 654 ... Drive circuit board, 656 ... Second drive circuit, 660 ... Current sensor of first rotating electrical machine, 662 ... Current sensor of second rotating electrical machine

Claims (12)

A stator of a rotating electrical machine comprising a stator core having a plurality of slots and a stator coil inserted into the slots,
At the apex of the portion of the stator coil that protrudes from the end surface of the stator core, a flat portion parallel to the end surface of the stator core, and a coil intermediate portion that is at both ends of the flat portion and the end surface of the stator core A stator of a rotating electric machine having one kind of intermediate part at one intermediate part and two kinds of intermediate parts at the other intermediate part. The stator of the rotating electrical machine according to claim 1,
The one kind of intermediate portion is provided on the inner peripheral side of the stator core,
The two kinds of intermediate portions are a stator of a rotating electric machine provided on an outer peripheral side of the stator core. The stator of the rotating electrical machine according to claim 1,
The angle between the end face of the stator core and the intermediate part on the stator core end face side of the intermediate part having the two kinds of intermediate parts is such that the end face of the stator core and the intermediate part having the one kind of intermediate part are Rotating electric machine stator smaller than the angle of. The stator of the rotating electrical machine according to claim 2,
The angle between the end face of the stator core and the intermediate part on the stator core end face side of the intermediate part having the two kinds of intermediate parts is the angle between the end face of the stator core and the intermediate part having the one kind of intermediate part. The stator of a rotating electrical machine smaller than the angle. The stator of the rotating electrical machine according to claim 1,
The angle between the end face of the stator core and the intermediate part on the plane side of the intermediate part having the two kinds of intermediate parts is based on the angle between the end face of the stator core and the intermediate part having the one kind of intermediate part. Large rotating electric machine stator. The stator of the rotating electrical machine according to claim 2,
The angle between the end face of the stator core and the intermediate part on the plane side of the intermediate part having the two kinds of intermediate parts is based on the angle between the end face of the stator core and the intermediate part having the one kind of intermediate part. Large rotating electric machine stator. In the stator of the rotating electrical machine according to claim 3,
The angle between the end face of the stator core and the intermediate part on the plane side of the intermediate part having the two kinds of intermediate parts is based on the angle between the end face of the stator core and the intermediate part having the one kind of intermediate part. Large rotating electric machine stator. The stator of the rotating electrical machine according to claim 4,
The angle between the end face of the stator core and the intermediate part on the plane side of the intermediate part having the two kinds of intermediate parts is based on the angle between the end face of the stator core and the intermediate part having the one kind of intermediate part. Large rotating electric machine stator. In the stator of the rotating electrical machine according to any one of claims 1 to 8,
A stator of a rotating electrical machine having a square cross-sectional shape. In the stator of the rotating electrical machine according to any one of claims 1 to 8,
A stator of a rotating electrical machine, wherein a welded portion that connects coils to each other is provided at a terminal portion of the stator coil. In the stator of the rotating electrical machine according to any one of claims 1 to 8,
A stator of a rotating electrical machine wound continuously over the entire circumference of the stator core.   A rotary electric machine comprising the stator of the rotary electric machine according to any one of claims 1 to 11.

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