JP2007336677A - Rotating electric machine and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric rotating machine in which cooling characteristics of a stator coil can be enhanced while suppressing an increase in the rotational resistance of a rotor, and to provide a vehicle comprising the electric rotating machine. <P>SOLUTION: The electric rotating machine comprises a rotor and a stator 2. The stator 2 comprises a stator core and a resin portion 4, i.e. an insulator portion covering a stator coil provided to surround the rotor. A partition wall 4c is provided on the axial end face of the resin portion 4 to surround the rotor. Furthermore, a portion 4e for supplying cooling oil around the partition wall 4c, and a passage 4f of the cooling oil supplied to the cooling oil supply portion 4e are provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine and a vehicle, and more particularly to a structure of a stator (stator) in the rotating electrical machine and a vehicle including the rotating electrical machine.

  A motor, which is a typical example of a rotating electrical machine, includes a stator that is a machine part that is fixed and does not move, and a rotor (rotor) that is a rotating part. The stator has a stator core and a stator coil wound around the stator core. By passing a three-phase current through the stator coil, the combined magnetic field generated due to the phase difference becomes a rotational force and the rotor rotates.

Since heat is generated by energizing the stator coil, various proposals have been made to improve the heat dissipation characteristics of the stator coil. For example, as described in Japanese Patent Application Laid-Open No. 2005-33908, metal parts are mounted, or as described in Japanese Patent Application Laid-Open No. 2005-269788, varnish treatment is performed to provide unevenness on the surface of the varnish layer. A cover having cooling fins is mounted as described in Japanese Patent Laid-Open No. 63-213464, and a resin is injected between the cover and the coil end portion, or a resin mold is mounted as described in Japanese Patent Laid-Open No. 2000-197311. Various measures have been proposed, such as forming a cooling path in the resin.
JP 2005-33908 A Japanese Patent Laid-Open No. 2005-269788 JP 63-213464 A JP 2000-197311 A

  According to the inventions described in the above-mentioned documents, it is possible to improve the heat dissipation characteristics of the coil end portion in the stator coil.

  However, there is a problem in that when a cooling medium such as oil is supplied to the surface of the coil end portion to cool the coil, the cooling medium flows into the gap between the stator and the rotor, and the rotational resistance of the rotor increases. Can occur.

  Therefore, an object of the present invention is to provide a rotating electrical machine that can improve the cooling characteristics of the stator coil while suppressing an increase in the rotational resistance of the rotor, and a vehicle equipped with the rotating electrical machine.

  A rotating electrical machine according to the present invention includes a rotor (rotor) and a stator (stator). The stator has a stator core and an insulating portion that covers the stator coil, and a cooling medium supply capable of supplying a cooling medium around the protruding portion by providing a protruding portion on the surface of the insulating portion so as to surround the rotor. Provide a part.

  The insulator part typically has an inner peripheral surface, an outer peripheral surface, and an annular axial end surface surrounding the rotor. In this case, it is preferable to provide the convex portion on the axial end surface. Moreover, it is preferable to integrally mold the insulator part and the convex part with a resin.

  A plurality of the convex portions may be provided. For example, an inner peripheral surface side convex portion located on the inner peripheral surface side of the insulator portion and surrounding the rotor, and an outer peripheral surface side convex portion positioned on the outer peripheral surface side of the insulator portion with respect to the inner peripheral surface side convex portion It is conceivable to provide In this case, it is preferable to provide a cooling medium passage through which the cooling medium can pass between the inner peripheral convex part and the outer peripheral convex part.

  You may provide the communicating path which connects a cooling-medium supply part and a cooling-medium channel | path to the said outer peripheral side convex part. Moreover, you may incline at least one part of the said convex part in the direction away from a rotor. For example, it is conceivable that the convex portion is inclined with respect to the surface of the insulator portion so that at least a part of the tip of the convex portion is located on the side away from the rotor.

  A vehicle according to the present invention includes the above-described rotating electrical machine.

  According to the present invention, since the convex portion is provided on the surface of the insulator portion covering the stator coil, the surface area of the insulator portion can be increased, and the cooling characteristics of the stator coil can be improved. Moreover, since the said convex part is provided so that a rotor may be surrounded, it can suppress that a cooling medium enters between a stator and a rotor, and can also suppress that the rotational resistance of a rotor increases.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the following embodiment, an example in which the present invention is applied to a motor generator (rotary electric machine) mounted on a hybrid vehicle will be described with reference to the drawings. Various vehicles other than the hybrid vehicle (for example, a fuel cell vehicle and an electric vehicle) The present invention can also be applied to rotating electrical machines mounted on various devices such as electric vehicles including automobiles, industrial equipment, air conditioning equipment, and environmental equipment.

  In the following embodiments, the same or corresponding parts are denoted by the same reference numerals. Furthermore, it is also planned from the beginning that not all of the constituent elements of each embodiment are essential, and some constituent elements may be omitted.

  Here, first, a configuration example of the hybrid vehicle 1 on which a motor generator (rotary electric machine) described in each embodiment described later can be mounted will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram illustrating a configuration example of a hybrid vehicle in which a motor generator in each of the following embodiments can be mounted. FIG. 2 is a diagram showing a schematic configuration of the motor generator shown in FIG. 1 and the vicinity thereof.

  The hybrid vehicle 1 shown in FIG. 1 is a front engine front wheel drive (FF) type vehicle, but the motor generator in each of the following embodiments is not limited to this hybrid vehicle of the FF type but also an FR (Front engine Rear). It can also be applied to a hybrid vehicle using a wheel drive system. In the case of the FR system, the configuration is slightly different from that of the FF system in that the engine is generally arranged and power is transmitted from the front engine to the rear wheels via the propeller shaft. Since the configuration is similar and the configuration of the FR hybrid vehicle is well known, the description of the FR hybrid vehicle is omitted in this specification.

  As shown in FIG. 1, the hybrid vehicle 1 includes an engine 100, a motor generator 200, a PCU (Power Control Unit) 300, a battery 400, a power split mechanism 500, a differential mechanism 600, a drive shaft 700, Drive wheels 800L and 800R, which are front wheels, are provided.

  In the example of FIG. 1, engine 100, motor generator 200, PCU 300, and power split mechanism 500 are arranged in engine room 900. The PCU 300 is provided on the side of the vehicle between the cowl and the front wheel suspension. Motor generator 200 and PCU 300 are connected by cable 3A. PCU 300 and battery 400 are connected by cable 3B. A power output device including engine 100 and motor generator 200 is connected to differential mechanism 600 through power split mechanism 500. Differential mechanism 600 is coupled to drive wheels 800L and 800R via drive shaft 700.

  Motor generator 200 is a three-phase AC synchronous motor generator, and generates driving force by AC power received from PCU 300. Motor generator 200 is also used as a generator when the hybrid vehicle 1 decelerates, etc., generates AC power by its power generation action (regenerative power generation), and outputs the generated AC power to PCU 300.

  PCU 300 converts the DC voltage received from battery 400 into an AC voltage, and drives and controls motor generator 200. The PCU 300 charges the battery 400 by converting the AC voltage generated by the motor generator 200 into a DC voltage. Power split device 500 is configured by combining various elements such as a planetary gear (not shown).

  The power output from engine 100 and / or motor generator 200 is transmitted from power split mechanism 500 to drive shaft 700 via differential mechanism 600. The driving force transmitted to the drive shaft 700 is transmitted as a rotational force to the drive wheels 800L and 800R, so that the vehicle can travel. In this case, motor generator 200 operates as an electric motor.

  On the other hand, when the vehicle is decelerated, the motor generator 200 is driven by the drive wheels 800L and 800R or the engine 100. In this case, motor generator 200 operates as a generator. The electric power generated by the motor generator 200 is stored in the battery 400 via an inverter in the PCU 300.

  Next, the configuration of the motor generator 200 and the vicinity thereof will be described in some detail with reference to FIG.

  The motor generator 200 is a rotating electrical machine having a function as an electric motor or a generator as described above, and includes a rotating shaft 240 rotatably attached to the housing 210 via a bearing 230, and a rotor attached to the rotating shaft 240. (Rotor) 250 and stator (stator) 2.

  The stator 2 has a stator core 20, and a stator coil (coil winding) is wound around the stator core 20. The coil end 21, which is the end of the wound stator coil, is electrically connected to a power supply terminal block (connector) 220 provided in the housing 210 via a bus bar (connecting conductor portion or lead-out portion). . The power supply terminal block 220 is electrically connected to the PCU 300 via the power supply cable 3A. Since PCU 300 is electrically connected to battery 400 via power supply cable 3B as shown in FIG. 1, battery 400 and the stator coil are electrically connected to each other via PCU 300 and power supply cables 3A and 3B. It will be.

  As shown in FIG. 2, the motor generator 200 is connected to a differential mechanism 600 via a speed reduction mechanism 270, and the differential mechanism 600 is connected to the drive shaft 700 via a drive shaft receiving portion 710. Therefore, the power output from motor generator 200 is transmitted to drive shaft 700 via reduction mechanism 270, differential mechanism 600 and drive shaft receiving portion 710.

(Embodiment 1)
Next, a structural example of the stator 2 in the motor generator (rotating electric machine) according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a perspective view showing a structural example of the stator 2 in the first embodiment.

  As shown in FIGS. 3 and 4, the stator 2 has a stator core 20 and a resin portion (insulator portion) 4. Theta core 20 has an annular shape and can be formed by laminating and laminating a plurality of plate-like magnetic materials such as electromagnetic steel plates. In addition, you may comprise the stator core 20 with the integral member which consists of magnetic materials.

  The stator core 20 typically has a plurality of teeth (projections) protruding radially inward on the inner periphery, a plurality of slots (concave portions: grooves) between the teeth, and the stator core 20. And a plurality of fixing portions 22. The fixing portion 22 has a through hole that can receive a fixing member such as a bolt. A stator coil is wound around each of the teeth of the stator core 20 by concentrated winding or distributed winding. In this way, by passing a current through the stator coil wound around the teeth, a magnetic field corresponding to the direction of the passed current is generated.

  The resin portion 4 covers the stator coil and seals the coil end of the stator coil. This resin part 4 is typically molded using a moldable resin material such as an epoxy resin. On the surface of the resin portion 4, partition portions (convex portions) 4 a, 4 b, 4 c are provided so as to surround the rotor. In the example of FIGS. 3 and 4, the resin portion 4 has a through hole 4 d that receives the rotor at the center, and has an annular shape as a whole. The resin portion 4 has an inner peripheral surface, an outer peripheral surface, and an annular axial end surface that surrounds the rotor therebetween. The partition walls 4a to 4c are provided on the axial end surface.

  3 and 4 show the case where three partition walls 4a to 4c are provided, the number of partition walls can be arbitrarily set. For example, only the innermost partition wall portion 4c (inner peripheral surface side convex portion) may be provided, and only the partition wall portion 4c and the partition wall portion 4b (outer peripheral surface side convex portion) are provided on the outer peripheral side of the partition wall portion 4c. It may be provided. Moreover, although each partition part 4a-4c has a substantially circular shape, it is good also considering the shape of each partition part 4a-4c as arbitrary shapes other than circular.

  As described above, the surface area of the resin portion 4 can be increased by forming convex portions such as the partition walls 4 a to 4 c on the surface of the resin portion 4. Thereby, the cooling characteristic of a stator coil can be improved.

  As shown in FIG. 3, the partition part 4 c located on the innermost side among the partition parts 4 a to 4 c is formed so as to surround at least the rotor. Thereby, when a cooling medium such as cooling oil is supplied to the axial end surface of the resin portion 4, the cooling medium can be prevented from flowing into the gap between the stator 2 and the rotor. When a cooling medium such as cooling oil flows into the gap between the stator 2 and the rotor, the rotational resistance of the rotor increases, so that the cooling medium flows into the gap between the stator 2 and the rotor as described above. By doing so, it is possible to avoid an increase in the rotational resistance of the rotor.

  In the stator 2 according to the first embodiment, as shown in FIG. 3, a region (cooling medium supply unit) capable of supplying a cooling medium around the partition wall 4 c surrounding the rotor (region on the outer peripheral side of the resin unit 4). Is provided. In the example of FIG. 3, the cooling oil supply part 4e is provided in the area | region outside the partition part 4c in the axial direction end surface of the resin part 4. As shown in FIG. The cooling oil which is an example of a cooling medium is supplied to this cooling oil supply part 4e.

  Here, a cooling oil supply method will be described with reference to FIGS. 12 and 13. For example, as shown in FIG. 12, a cooling oil passage 6a is provided in a housing 210 that accommodates the stator 2 and the rotor, and the cooling oil supplied from the cooling oil supply source 6 through the cooling oil passage 6a is supplied to the cooling oil supply section. 4e can be supplied. At this time, as shown in FIG. 12, the tip of the partition wall 4c is brought into contact with or close to the housing 210, thereby further effectively suppressing the cooling medium from flowing into the gap between the stator 2 and the rotor. Can do. Further, some member may be interposed between the partition wall 4c and the housing 210 to suppress the cooling medium from flowing into the gap between the stator 2 and the rotor. For example, an oil catcher or an oil pump can be used as the cooling oil supply source 6.

  Although the example of FIG. 12 demonstrated the case where cooling oil was supplied from the front so that it might spray with respect to the cooling oil supply part 4e, the supply direction of cooling oil can be selected arbitrarily. For example, as shown in FIG. 13, the cooling oil can be supplied from the rear of the resin part 4 to the cooling oil supply part 4e. In the example of FIG. 13, the cooling oil passage 6a reaching the vicinity of the fixed portion 22 of the stator core 20 is provided, and the cooling oil from the cooling oil supply source is supplied to the cooling oil supply portion 4e through the cooling oil passage 6a. ing.

  As shown in FIGS. 3 and 5, a cooling oil passage (cooling medium passage) 4 f through which a cooling medium such as cooling oil can pass is provided between the partition walls 4 a to 4 c. By providing the cooling oil passage 4f as described above, the cooling oil can be supplied to a wide range of the surface of the resin portion 4 along the cooling oil passage 4f as indicated by an arrow in FIG. Thereby, the stator coil can be efficiently cooled.

  Although the number of the cooling oil passages 4f may be singular, it is preferably plural. By providing a plurality of cooling oil passages 4f, the contact area between the cooling oil and the surface of the resin portion 4 can be increased, and the stator coil can be cooled more efficiently. Moreover, it is preferable to provide the cooling oil passage 4 f over the entire axial end surface of the resin portion 4. In this case, the cooling oil can be supplied to the entire axial end surface of the resin portion 4.

  In the example of FIGS. 3 to 5, a plurality of two arc-shaped cooling oil passages 4 f are provided on the axial end surface of the resin portion 4, but the number of cooling oil passages 4 f may be three or more. Further, the shape of the cooling oil passage 4f can be arbitrarily selected. Also, in the example of FIGS. 3 to 5, the partition walls 4 a to 4 c are formed along a concentric circle, and the intervals between the partition walls 4 a to 4 c are made substantially equal, so that a plurality of cooling oil passages 4 f having substantially the same width are provided. Although provided, the width of the cooling oil passage 4f can be changed.

  As shown in FIG. 4, the partition walls 4 a to 4 c and the resin part 4 are preferably integrally formed with a resin. Thereby, sealing of the stator coil and molding of the partition walls 4a to 4c can be performed simultaneously, and the partition walls 4a to 4c can be easily molded. In addition, although it is also possible to form the partition parts 4a-4c with a member different from the resin part 4, in this case, the special member and components for preparation of the partition parts 4a-4c are needed. On the other hand, by integrally molding the partition walls 4a to 4c and the resin portion 4 as described above, no special members or parts are required, and the partition walls 4a to 4c can be provided at low cost. That is, the stator coil sealing, the stator coil cooling performance improvement, and the suppression of the increase in the rotational resistance of the rotor can be realized easily and at low cost.

  As shown in FIG. 3, a part of the partition walls 4a and 4b located outside the partition wall 4c surrounding the rotor is cut (divided), etc. You may provide the communicating path which connects these. Thereby, the cooling oil can be guided from the cooling oil supply part 4e to the cooling oil passage 4f.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described with reference to FIG.

  In Embodiment 1 described above, the partition walls 4a to 4c are formed so as to rise substantially vertically from the axial end surface of the resin portion 4, but at least a part of the partition walls 4a to 4c is used as the axial end surface of the resin portion 4. You may make it incline with respect to. For example, it is conceivable that the partition walls 4 a to 4 c are inclined with respect to the axial end surface of the resin portion 4 so that at least a part of the tip ends of the partition walls 4 a to 4 c are located in a direction away from the rotor. By inclining the partition walls 4a to 4c in this way, it is possible to effectively suppress the cooling oil (cooling medium) from flowing into the gap between the stator 2 and the rotor.

  In the example of FIG. 6, a part of the partition wall 4c located on the cooling oil supply unit 4e side is inclined in a direction away from the rotor. That is, the partition part located between the cooling oil supply part 4e and the rotor is inclined in a direction away from the rotor. Thereby, it is possible to effectively prevent the cooling oil supplied to the cooling oil supply unit 4e from flowing into the gap between the stator 2 and the rotor.

  In addition, in the cross section of FIG. 6, although the partition parts 4a-4c are inclined in the same direction, it is also possible to incline these in a different direction. In the case where the partition walls 4a to 4c are inclined in the same direction, the partition walls 4a to 4c can be molded by using a mold having a simple configuration, and the structure of the molding mold for the resin section 4 is simplified. can do.

  On the other hand, it is also possible to provide a plurality of cooling oil supply parts 4e. In this case, if the partition wall parts 4a to 4c located between the respective cooling oil supply parts 4e and the rotor are inclined in the direction away from the rotor, Good. Thereby, it can suppress effectively that the cooling oil supplied from the some cooling oil supply part 4e flows into the clearance gap between the stator 2 and a rotor.

  In the second embodiment, only the partition walls 4a to 4c positioned between the cooling oil supply unit 4e and the rotor and the vicinity thereof may be selectively inclined in a direction away from the rotor, but the partition walls 4a to 4c It is also possible to incline in the direction away from the rotor over the entire circumference. The configuration other than the above is basically the same as that in the first embodiment.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described with reference to FIGS.

  As shown in FIGS. 7 and 8, a cover 5 may be mounted on the partition walls 4a to 4c so as to cover at least a part of the cooling oil passage 4f. In this case, it is possible to suppress the cooling oil (cooling medium) from entering the gap between the stator 2 and the rotor more effectively than in the above-described embodiments.

  The cover 5 is preferably made of the same material as the resin portion 4, but can be made of a material different from the resin portion 4. The cover 5 can be attached to the partition walls 4a to 4c of the resin portion 4 using an adhesive or the like.

  In the example of FIGS. 7 and 8, the cover 5 is bonded onto the tip end portions of the partition walls 4a to 4c so as to cover all the cooling oil passages 4f, but covers a part of the cooling oil passages 4f. A cover 5 may be provided. For example, the cover 5 is provided so as to cover only a part of the cooling oil passage 4f located around the cooling oil supply part 4e, or the cover 5 is provided so as to cover only the cooling oil passage 4f located on the innermost side (rotor side). It is also possible to provide the cover 5 so as to extend outward (at the outer peripheral side of the resin portion 4) from at least one tip of the partition walls 4a to 4c and to cover only the inner peripheral side portion of the cooling oil passage 4f. .

  7 and 8, the notch 5a is provided in the cover 5 so that the entire cooling oil supply unit 4e is exposed, but the cover 5 is cooled so as to cover a part of the cooling oil supply unit 4e. You may make it protrude on the oil supply part 4e. The configuration other than the above is basically the same as that in the first embodiment.

(Embodiment 4)
Next, Embodiment 4 of the present invention will be described with reference to FIG.

  In each above-mentioned embodiment, although the height of partition part 4a-4c from the axial direction end face of resin part 4 is made equal, you may vary the height of partition part 4a-4c. For example, as shown in FIG. 9, the height of the partition wall portion 4c located on the innermost side (rotor side) may be higher than the height of the partition wall portions 4a and 4b positioned on the outer peripheral side of the partition wall portion 4c. . Also in this case, it is possible to effectively suppress the cooling oil (cooling medium) from flowing into the gap between the stator 2 and the rotor. Other configurations are basically the same as those in the first embodiment.

(Embodiment 5)
Next, Embodiment 5 of the present invention will be described with reference to FIG.

  In each of the above-described embodiments, a discharge port through which the cooling oil (cooling medium) supplied to the cooling oil passage 4f can be discharged to the outside of the cooling oil passage 4f is not provided, but such a discharge port may be provided. In the example of FIG. 10, the cooling oil discharge port 4g is provided by locally dividing the partition walls 4a and 4b. By providing such a discharge port, the flow of the cooling oil in the cooling oil passage 4f can be promoted, and the stator coil can be efficiently cooled, and a large amount of cooling oil is supplied to the cooling oil passage 4f. In this case, it is possible to effectively prevent the cooling oil from overflowing from the cooling oil passage 4f to the rotor side.

  In the example of FIG. 10, the cooling oil discharge port 4g is provided in the partition walls 4a and 4b so as to communicate with a portion where the cooling oil is expected to be accumulated, that is, a portion located at the lowest side in the cooling oil passage 4f. . Thereby, the cooling oil can be efficiently discharged from the cooling oil passage 4f to the outside. The number, formation position, shape, and the like of the cooling oil discharge port 4g are not limited to those shown in FIG. 10 and can be arbitrarily selected. Other configurations are basically the same as those in the first embodiment.

(Embodiment 6)
Next, Embodiment 6 of the present invention will be described with reference to FIG.

  In each of the above-described embodiments, the distance between both end portions in the longitudinal direction of the partition walls 4a and 4b is substantially constant, but it is also conceivable to vary the distance between both ends of the partition walls 4a and 4b. For example, as shown in FIG. 11, the interval between both end portions 4a1 of the partition wall portion 4a located on the outermost side (the outer periphery side of the resin portion 4) is set such that the partition wall portion 4b positioned on the inner side (rotor side) of the partition wall portion 4a. It is conceivable to make it wider than the distance between the both end portions 4b1. In this case, the cooling oil (cooling medium) can be appropriately distributed to both the outer cooling oil passage 4f and the inner cooling oil passage 4f, and the amount of cooling oil supplied between the respective cooling oil passages 4f. Can be reduced. Thereby, the stator coil can be efficiently cooled. Other configurations are basically the same as those in the first embodiment.

  Although the embodiments of the present invention have been described as described above, it is also planned from the beginning to appropriately combine the configurations of the above-described embodiments. Further, it should be considered that the embodiment disclosed this time is illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

It is the schematic which shows the structural example of the hybrid vehicle which can mount the motor generator (rotary electric machine) in each embodiment of this invention. It is a figure which shows schematic structure of the motor generator shown in FIG. 1, and its vicinity. It is a perspective view which shows the structural example of the stator in Embodiment 1 of this invention. It is sectional drawing seen along the IV-IV line of FIG. It is a front view which shows the structural example of the stator in Embodiment 1 of this invention. It is sectional drawing which shows the structural example of the stator in Embodiment 2 of this invention. It is a perspective view which shows the structural example of the stator in Embodiment 3 of this invention. It is sectional drawing seen along the VIII-VIII line of FIG. It is sectional drawing which shows the structural example of the stator in Embodiment 4 of this invention. It is a front view which shows the structural example of the stator in Embodiment 5 of this invention. It is a front view which shows the structural example of the stator in Embodiment 6 of this invention. It is sectional drawing which shows an example of a cooling oil channel | path. It is sectional drawing which shows the other example of a cooling oil channel | path.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Hybrid vehicle, 2 Stator, 3, 3A, 3B Cable, 4 Resin part, 4a, 4b, 4c Partition part, 4a1, 4b1 End part, 4d Through-hole, 4e Cooling oil supply part, 4f Cooling oil passage, 4g Cooling oil Discharge port, 5 cover, 5a notch, 6 cooling oil supply source, 20 stator core, 21 coil end, 22 fixed part, 100 engine, 200 motor generator, 210 housing, 220 power supply terminal block, 230 bearing, 240 rotating shaft, 250 rotor, 270 reduction mechanism, 300 PCU, 400 battery, 500 power split mechanism, 600 differential mechanism, 700 drive shaft, 710 drive shaft receiving portion, 800L, 800R drive wheel, 900 engine room.

Claims (7)

A rotor and a stator,
The stator has a stator core and an insulator portion covering the stator coil,
A rotating electrical machine in which a convex portion is provided on a surface of the insulator portion so as to surround the rotor, and a cooling medium supply portion capable of supplying a cooling medium is provided around the convex portion. The insulator portion has an inner peripheral surface, an outer peripheral surface, and an annular axial end surface surrounding the rotor,
The rotating electrical machine according to claim 1, wherein the convex portion is provided on the axial end surface.   The rotating electrical machine according to claim 1 or 2, wherein the insulator portion and the convex portion are integrally formed of a resin. The convex portion is located on the inner peripheral surface side of the insulator portion and surrounds the rotor, and is located closer to the outer peripheral surface side of the insulator portion than the inner peripheral surface side convex portion. An outer peripheral surface side convex portion,
The rotating electrical machine according to claim 2, wherein a cooling medium passage through which the cooling medium can pass is provided between the inner circumferential convex portion and the outer circumferential convex portion.   5. The rotating electrical machine according to claim 4, wherein a communication path that communicates the cooling medium supply section and the cooling medium path is provided in the outer peripheral side convex portion.   The rotating electrical machine according to any one of claims 1 to 5, wherein at least a part of the convex portion is inclined in a direction away from the rotor.   A vehicle comprising the rotating electrical machine according to any one of claims 1 to 6.

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