JP6626768B2 - Stator of rotating electric machine, and rotating electric machine provided with the same - Google Patents

Description

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

  As a background art of this technical field, there is Japanese Patent Application Laid-Open No. 2011-234482 (Patent Document 1). This publication discloses “a stator for a rotating electric machine capable of reducing damage to an insulating film of a conductor forming a stator coil while suppressing an increase in the size of a coil end of the stator coil. Is formed at a predetermined distance from the first slot via a protrusion projecting from the first slot in a direction parallel to the axial direction of the stator core and a first bent portion bent circumferentially from the tip of the protrusion. A slope portion extending obliquely at an angle of less than 90 degrees toward the k-th slot (the other slot) separated by one magnetic pole pitch); and a k-th bent portion extending from the tip of the slope portion in a direction parallel to the axial direction of the stator core. And a second bent portion connected to the slot housing portion housed 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 is increased, adjacent coils are likely 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 a large number of conductive wires at the time of slot transfer, but there is a possibility that the insulating coating covering the coil surface may be easily damaged. As a countermeasure against this, if the insulating film is made thicker, the space factor of the conductor in the slot becomes smaller, the efficiency is reduced, 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 of 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 same. .

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

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

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

FIG. 1 is a schematic configuration diagram of a hybrid electric vehicle equipped with a rotating electric machine according to an embodiment. FIG. 4 is a circuit diagram of a power conversion device 600. Sectional drawing of the rotary electric machine of this embodiment. FIG. 4 is an r-θ cross-sectional view of the stator 230 and the rotor 250 of the embodiment. FIG. 9 is a perspective view of the stator 230 of the present embodiment as viewed from the non-connection side coil end 242. The schematic diagram which expanded the r-theta cross section of one slot of the stator 230 of this embodiment. The figure which looked at the segment coil 243 before being attached to the stator core 232 of this embodiment from the stator core inner peripheral side. The figure which looked at the non-connection side coil end 241 of the stator 230 of this embodiment from the outer peripheral side. The figure which looked at the non-connection side coil end 241 of the stator 230 of this embodiment from the inner peripheral side.

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

  In the present embodiment, for example, it is suitable as a running motor of an electric vehicle. The rotating electric machine according to the present invention can be applied to a pure electric vehicle running only by the rotating electric machine or a hybrid electric vehicle driven by both the engine and the rotating electric machine. explain.

  FIG. 1 is a diagram showing a schematic configuration of a hybrid electric vehicle equipped with a rotating electric machine according to one embodiment of the present invention. The vehicle 100 has an engine 120, a first rotating electrical machine 200, a second rotating electrical machine 202, and a battery 180 mounted thereon. The battery 180 supplies DC power to the rotating electric machines 200 and 202 via the power converter 600 when the driving force of the rotating electric machines 200 and 202 is required, and receives DC power from the rotating electric machines 200 and 202 during regenerative running. . Transfer of DC power between the battery 180 and the rotating electric 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 power), and supplies DC power to a control circuit described below.

  The rotational torque from the engine 120 and the rotary electric machines 200 and 202 is transmitted to the front wheels 110 via the transmission 130 and the 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. Battery 180 is controlled by battery control device 184. The transmission control device 134, the engine control device 124, the battery control device 184, the power conversion device 600, and the integrated control device 170 are connected by a 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. 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 are received therefrom 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 composed of a secondary battery such as a lithium-ion battery or a nickel-metal hydride battery, and outputs 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 status of each unit cell battery constituting the battery 180 to the integrated control device 170 via the communication line 174.

  When the integrated control device 170 determines that the battery 180 needs to be charged based on the information from the battery control device 184, the integrated control device 170 issues a power generation operation instruction to the power conversion device 600. Further, the integrated control device 170 mainly manages the output torque of the engine 120 and the rotating electric machines 200 and 202, and calculates the total torque of the output torque of the engine 120 and the output torque of the rotating electric machines 200 and 202 and the torque distribution ratio. Is transmitted to the transmission control device 134, the engine control device 124, and the power conversion device 600. The power conversion device 600 controls the rotating electric machines 200 and 202 based on the torque command from the integrated control device 170 so as to generate a torque output or a generated power according to the command.

  Power converter 600 includes a power semiconductor that constitutes an inverter for operating rotating electric 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 rotating electric machines 200 and 202 are operated as electric motors or generators.

When rotating electric machines 200 and 202 operate as electric motors, DC power from high-voltage battery 180 is supplied to a DC terminal of an inverter of power conversion device 600. The power conversion device 600 controls the switching operation of the power semiconductor, converts the supplied DC power into three-phase AC power, and supplies the three-phase AC power to the rotating electric machines 200 and 202. On the other hand, when the rotating electric machines 200 and 202 are operated as generators, the rotors of the rotating electric machines 200 and 202 are driven to rotate by a rotating torque applied from the outside, and the three-phase winding 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. Power conversion device 600 includes a first inverter device for rotating electric machine 200 and a second inverter device for rotating electric machine 202. The first inverter device includes a power module 610, a first drive circuit 652 that controls a switching operation of each power semiconductor 21 of the power module 610, and a current sensor 660 that detects a current of the rotating electric 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 a switching operation of each power semiconductor 21 in the power module 620, and a current sensor 662 that detects a current of the rotating electric machine 202. ing. The driving circuit 656 is provided on the driving circuit board 654. The control circuit 648 provided on the control circuit board 646, the transmission / reception circuit 644 mounted on the capacitor module 630 and 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 power modules 610 and 620 converts DC power supplied from battery 180 into three-phase AC power, and supplies the converted power to stator windings, which are armature windings of rotating electric machines 200 and 202. Further, power modules 610 and 620 convert AC power induced in the stator windings of rotating electric machines 200 and 202 into DC and supply the DC power to high-voltage battery 180.

  The power modules 610 and 620 are provided with 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 forming an upper arm and a power semiconductor 21 forming a lower arm, and the 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 here as a representative.

  In the present embodiment, an IGBT (insulated gate bipolar transistor) 21 is used as a switching power semiconductor element. The IGBT 21 has 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 connected to the collector electrode of the IGBT 21 and the anode electrode is connected to the IGBT 21 so that the direction from the emitter electrode of the IGBT 21 to the collector electrode is the forward direction. Each is electrically connected to the emitter electrode.

  Note that a MOSFET (metal oxide semiconductor field effect transistor) may be used as the switching power semiconductor element. The MOSFET has three electrodes: a drain electrode, a source electrode, and a gate electrode. In the case of a MOSFET, a parasitic diode having a forward direction from the drain electrode to the source electrode is provided between the source electrode and the drain electrode, so that it is not necessary to provide the diode 38 of FIG.

  The arm of each phase is configured such that the emitter electrode of the IGBT 21 and the collector electrode of the IGBT 21 are electrically connected in series. In the present embodiment, only one IGBT of each upper and lower arm of each phase is shown. However, since the current capacity to be controlled is large, a plurality of IGBTs are actually electrically connected in parallel. ing. In the following, for simplicity, the description will be made as one power semiconductor.

  In the example shown in FIG. 2, each upper and lower arm of each phase is formed by 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 midpoint of each arm of each phase (the connection between the emitter electrode of the upper arm IGBT and the collector electrode of the lower arm IGBT) is connected to the armature winding (fixed) of the corresponding rotating electric machine 200, 202 in the corresponding phase. Child winding).

  Drive circuits 652 and 656 constitute a drive unit for controlling corresponding inverter devices 610 and 620, and generate a drive signal for driving IGBT 21 based on a control signal output from control circuit 648. I do. The drive signals generated by the respective drive circuits 652 and 656 are output to the gates of the respective power semiconductor elements of the corresponding power modules 610 and 620. The drive circuits 652 and 656 each include 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 forms a control unit of each of the inverter devices 610 and 620, and is configured 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 electric machines 200 and 202. The control circuit 648 calculates a control value based on these input signals, and outputs a control signal for controlling 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 device 600 and an external control device, and transmits and receives information to and from other devices via the communication line 174 in FIG. Send and receive. The capacitor module 630 forms a smoothing circuit for suppressing a change in DC voltage caused by the switching operation of the IGBT 21, and is electrically connected to a DC-side terminal of the first power module 610 or the second power module 620. They are connected in parallel.

  FIG. 3 shows an rZ sectional view of the rotating electric machine 200 of FIG. The rotating electric machine 200 and the rotating electric machine 202 have substantially the same structure, and the structure of the rotating electric machine 200 will be described below as a representative example. However, the structure described below does not need to be employed in both rotating electric 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. On the inner peripheral side of the stator core 232, a rotor 280 is rotatably held via a gap 222. The rotor 280 includes a rotor core 282 fixed to a shaft 218, a permanent magnet 284, and a nonmagnetic 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 of the pole of the rotor 280 and the rotation speed. 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. Power module 610 performs a switching operation based on the control signal, and converts DC power supplied from battery 180 to three-phase AC power. The 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 diagram showing an r-θ section of the stator 230 and the rotor 280, and is a sectional view taken along the line AA of FIG. 4, illustration of the housing 212, the shaft 218, and the stator winding 238 is omitted. On the inner peripheral side of the stator core 232, a number of slots 237 and teeth 236 are arranged uniformly over the entire circumference. In FIG. 4, reference numerals are not given to all of the slots and the teeth, but reference numerals are given to only some of the teeth and the slots as representatives. 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 in FIG. 3 are mounted. In this embodiment, since the number of slots per pole is two, 72 slots 237 are formed at equal intervals. The number of slots per pole is defined as two U-phases, V-phases, and W-phases in each slot 237 in the θ direction as U-phase, U-phase, V-phase, V-phase, W-phase, W-phase,. This means that the phases are arranged so as to be arranged one by one, and six slots 237 are used for the U-phase, V-phase and W-phase of one pole. In the present embodiment, the number of the slots 237 of the stator core 232 is 6 × 12 = 72 because the permanent magnets 284 described later are 12 poles arranged in the θ direction.

  In the vicinity of 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 the hole 283 and fixed with an adhesive or the like. The width in the θ direction of the hole 283 is set to be larger than the width in the θ direction of the permanent magnet 284 (284a, 284b), and the hole spaces 287 on both sides of the permanent magnet 284 function as magnetic gaps. The hole space 287 may be embedded with an adhesive or may be integrally formed with the permanent magnet 284 with a molding resin. The permanent magnet 284 functions as a field pole of the rotor 280, and has a 12-pole configuration in the present embodiment.

  The magnetization direction of the permanent magnet 284 is in the radial direction, and the direction of the magnetization direction is reversed for each field pole. That is, assuming that the stator side surface of the permanent magnet 284a is the N pole and the shaft side surface is the S pole, the stator side surface of the adjacent permanent magnet 284b is the S pole and the shaft side surface is the 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 permanent magnet 284 after magnetization is a strong magnet, if the magnet is magnetized before the permanent magnet 284 is fixed to the rotor 280, a strong attractive force is generated between the permanent magnet 284 and the rotor core 282 when the permanent magnet 284 is fixed. Occurs and hinders the assembling work. In addition, dust such as iron powder may adhere to the permanent magnet 284 due to the strong attractive force of the permanent magnet 284. Therefore, in consideration of the productivity of the rotating electric machine, it is preferable to magnetize after inserting the permanent magnet 284 into the rotor core 282.

  As the permanent magnet 284, a neodymium-based or samarium-based sintered magnet, a ferrite magnet, a neodymium-based bonded magnet, or the like can be used. 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 a component interlinking each phase winding of the magnetic flux output from the permanent magnet 284 and a component orthogonal to the interlinking 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 is The product of the fundamental component of the alternating current is torque ripple, which is a harmonic component of torque. That is, in order to reduce the torque ripple, the harmonic component of the linkage magnetic flux may be reduced. In other words, since the product of the linkage flux and the angular velocity at which the rotor rotates is the induced voltage, reducing the harmonic component of the linkage 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, the stator winding 238 is formed by using a plurality of substantially U-shaped segment coils 243 for the stator core 232 and forming a wave winding by winding the segment coil 243 in a wave shape. On both end surfaces of the stator core 232, a connection-side coil end 241 for connecting a terminal portion of the segment coil 243 and an anti-connection-side coil end 242 formed by a portion of the segment coil 243 that is a U-shaped bottom are formed. ing. In the present embodiment, since there are 72 slots 237, 72 segment coils 243 are inserted so as to be arranged in the circumferential direction. Further, in the present embodiment, when the segment coils 243 inserted in the circumferential direction of 72 pieces constitute one winding group, in the present embodiment, when the first winding group is formed from the innermost circumference of the stator core 232, the first winding group 242 a , A second winding group 242b, a third winding group 242c, and a fourth winding group 242d.

  FIG. 6 is a schematic diagram enlarging an r-Θ cross section of one slot of the stator 230, and is a simplified diagram in which a slot insulating material provided between the stator core 232 and the segment coil 243 is omitted. As shown in FIG. 6, the segment coils 243 are arranged on the stator core 232 so as to form a plurality of layers. In the present embodiment, the layers are arranged so as to be composed of layers 1 to 8 in order from the inner peripheral side (the lower part in the figure) in the r direction. The non-connection-side coil end 242 includes four winding groups. The first winding group 242a has layers 1 and 2; the second winding group 242b has layers 3 and 4; 242c is inserted in layers 5 and 6, and the fourth winding group 242d is inserted in layers 7 and 8. In the present 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 circumferential side of the stator core.

  The r-Θ cross section shown in FIG. 6 is a cross sectional view of a portion corresponding to the slot insertion section 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 layer 1 and the slot insertion portion 244b is inserted into layer 2.

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

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

  By adopting such a configuration, the height in the Z direction of the non-connection-side coil end can be suppressed as compared with a segment coil in which the intermediate portions of the odd layer and the even layer each have only one type.

  FIG. 8A is a diagram of the non-connection side coil end 242 viewed from the outer circumference side, and FIG. 8B is a view of the opposite connection side coil end 242 viewed from the inner circumference side. In order to suppress the height in the z direction of the non-connection side coil end 242, a plane portion 250 is provided, and an intermediate portion between the plane portion 250 and the stator core 232 is one of each of an even layer and an odd layer. Then, as shown by a 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 types of intermediate parts 252 and 253, and the angle between the intermediate part 252 and the end face of the stator core 232 is the intermediate part. The intermediate part 253 is larger than the angle between the part 251 and the end face of the stator core end face 232, and the angle between the intermediate part 253 and the end face of the stator core 232 is the angle between the middle part 251 and the end face of the stator core end face 232. By making it smaller, it is possible to avoid interference with the adjacent segment coil 243 while suppressing the height of the non-connection side coil end 242 in the z direction.

  With such a configuration, when a plurality of segment coils 243 are arranged in the circumferential direction, two types of intermediate portions 252 and 253 between the flat 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 plane portion 250 of the adjacent segment coil 243 and the slot insertion portion 244a entering the odd layer can be seen.

  By providing such a space, for example, when ATF direct cooling, which is one of the cooling methods, is used, even when an anti-connection side coil end composed of a plurality of winding groups is used, a winding close to the inner circumferential side is provided. 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 and the intermediate portion are two types similarly to 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 with one type of intermediate portion between the slot insertion portion 244a that enters the odd layer.

  When two types of intermediate portions are provided between the slot insertion portion 244a included in the odd-numbered layer and one type of intermediate portions provided between the slot insertion portion 244b included in the even-numbered layer, FIG. 8A seen from the outer periphery and FIG. 8B seen 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 non-connection side coil end than in 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 entering the odd layer, and two types of intermediate portion 252 is provided between the slot insertion portion 244b entering the even layer. And 253, the effect of not only suppressing the height of the non-connection side coil end but also enhancing the cooling effect can be expected.

  Note that the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment. Also, for a part of the configuration of each embodiment, it is possible to add, delete, or replace another configuration.

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 electric machine, 202 second rotating electric machine, 212 housing, 214 end bracket, 216 bearing, 218 shaft, 222 ... Air gap, 224 ... Resolver, 226 ... Plate, 230 ... Stator, 232 ... Stator core, 236 ... Tees, 237 ... Slot, 238 ... Stator winding, 241 ... Connection side coil end, 242 ... Non-connection side coil End, 242a: first winding group, 242b: second winding group, 242c: third winding group, 242d: fourth winding group, 243: segment coil, 244a: slot insertion section, 244b: slot insertion section , 250 ... plane part, 251 ... middle part, 252 ... middle part, 253 ... middle Position, 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 converter, 610: power module of the first inverter, 620: power module of the second inverter, 630: capacitor module, 642: connector board, 644: transmitting / receiving 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 (14)

A stator of a rotary electric machine including a stator coil, a having a stator core, the slot insertion section to be inserted into said slot having a plurality of slots,
The stator coil has a flat portion parallel to the stator core end surface at an apex of a portion of the stator coil protruding from the stator core end surface,
At coil intermediate portions at both ends of the flat portion and the stator core end surface,
The intermediate portion of the one side has one of the intermediate portion, the intermediate portion of the other side have a two intermediate part,
The slot has a plurality of layers arranged in a circumferential direction of the stator core,
If n is a natural number,
The slot insertion portion on the one kind of intermediate portion side is located in the 2n-1st layer from the inner peripheral side of the stator core in the layer,
The stator for a rotating electric machine, wherein the slot insertion portions on the two types of intermediate portions are located on a 2nth layer from an inner peripheral side of the stator core among the layers. The stator of the rotating electric machine according to claim 1,
The one kind of intermediate portion is provided on an inner peripheral side of the stator core,
The two kinds of intermediate parts are a stator of a rotating electric machine provided on an outer peripheral side of the stator core. The stator of the rotating electric machine according to claim 1,
The angle between the end face of the stator core and the intermediate part on the side of the stator core end face of the intermediate part having the two kinds of intermediate parts is the end face of the stator core and the intermediate part having the one kind of intermediate part. Of rotating electric machine smaller than the angle of. The stator of the rotating electric machine according to claim 1 ,
The angle between the end surface of the stator core and the intermediate portion on the stator core end surface side of the intermediate portion having the two types of intermediate portions is defined by the angle between the end surface of the stator core and the intermediate portion having the one type of intermediate portion. Stator of rotating electric machine smaller than angle. The stator of the rotating electric machine according to claim 1,
The angle between the end face of the stator core and the intermediate portion on the plane side of the intermediate portion having the two types of intermediate portions is smaller than the angle between the end surface of the stator core and the intermediate portion having the one type of intermediate portion. Large rotating electric machine stator. The stator of the rotating electric machine according to claim 1 ,
The angle between the end face of the stator core and the intermediate portion on the plane side of the intermediate portion having the two types of intermediate portions is smaller than the angle between the end surface of the stator core and the intermediate portion having the one type of intermediate portion. Large rotating electric machine stator. The stator of the rotating electric machine according to claim 3,
The angle between the end face of the stator core and the intermediate portion on the plane side of the intermediate portion having the two types of intermediate portions is smaller than the angle between the end surface of the stator core and the intermediate portion having the one type of intermediate portion. Large rotating electric machine stator. The stator of the rotating electric machine according to claim 4,
The angle between the end face of the stator core and the intermediate portion on the plane side of the intermediate portion having the two types of intermediate portions is smaller than the angle between the end surface of the stator core and the intermediate portion having the one type of intermediate portion. Large rotating electric machine stator. The stator of the rotating electric machine according to any one of claims 1 to 8,
  When viewed from the inner peripheral side of the stator core,
  The two intermediate portions of a predetermined first stator coil of the stator coils;
  The flat portion of the second stator coil adjacent to the first stator coil;
  And a region formed by being surrounded by the intermediate portion of the second stator coil,
  The stator of the rotating electric machine, wherein the third stator coil adjacent to the second stator coil is disposed at a position overlapping the region. The stator of the rotating electric machine according to any one of claims 1 to 9,
  A stator of a rotating electrical machine including a refrigerant directly to the stator coil. The stator of the rotating electric machine according to any one of claims 1 to 10 ,
A stator of a rotating electric machine having a square cross section. The stator of the rotating electric machine according to any one of claims 1 to 11,
A stator for a rotating electric machine, wherein a terminal portion of the stator coil is provided with a welded portion connecting the coils. In the stator of the rotating electric machine according to any one of claims 1 to 1 2,
A stator for a rotating electric machine that is continuously wound around the entire circumference of the stator core. Rotating electric machine including a stator of a rotary electric machine according to any one of claims 1 to 1 3.

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