JP2017093136A - Dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform appropriate refrigerant supply over the entire circumferential direction of the stator of a dynamo-electric machine.SOLUTION: A motor generator 1 includes a stator core 11 having a plurality of teeth 12, a coil 13 wound around the plurality of teeth 12, respectively, and a rotor 20 arranged on the inside of the stator core 11, and having refrigerant passages 22a, 22b, and scatters ATF from the refrigerant discharge port 22c of the refrigerant passages 22a, 22b by using the rotary centrifugal force of the rotor 20. In each of the plurality of teeth 12, ring members 14, 15 are fixed to the axial direction end face 12a closer to the inner peripheral side tip than the winding position of the coil 13, and on the inner peripheral surface of the ring members 14, 15, tapered surfaces 14c, 15c for introducing the ATF from the refrigerant discharge port 22c to an air gap G are formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine that scatters refrigerant from a rotor toward a stator.

  In a rotating electrical machine, a refrigerant such as ATF is supplied to a stator and a rotor to cool the stator and the rotor. In particular, in order to cool the coil of the rotating electrical machine, the coolant is supplied from the rotor toward the coil end of the coil. In this configuration, the insulator fixed to the axial end surface of the tooth is formed with a refrigerant guide surface that increases from the inner peripheral side of the tooth toward the outer peripheral side, and the refrigerant is discharged onto the refrigerant guide surface, whereby the refrigerant is coiled. A configuration for supplying to the end is known (see, for example, Patent Document 1).

JP 2011-4472 A

  In the configuration described in Patent Document 1, the refrigerant is guided to the coil end by the refrigerant guide surface of the insulator fixed to the teeth. For this reason, in the circumferential direction, there is no refrigerant guide surface between the teeth, that is, at a position corresponding to the slot. Therefore, there is a possibility that an appropriate refrigerant supply as intended cannot be realized at the position corresponding to the slot. .

  Therefore, an object of the present invention is to perform an appropriate refrigerant supply over the entire circumference in the stator circumferential direction of the rotating electrical machine.

  A rotating electric machine according to the present invention includes an annular stator yoke, a stator core having a plurality of teeth protruding from the stator yoke to the inner peripheral side, coils wound around the plurality of teeth, and an inner side of the stator core. And a rotor having a refrigerant flow path, wherein the rotary electric machine scatters the refrigerant from the refrigerant discharge port of the refrigerant flow path toward the stator core using the rotational centrifugal force of the rotor, the plurality of teeth Each of which includes a ring member fixed to the axial end surface of the tip on the inner peripheral side relative to the winding position of the coil, and the refrigerant from the coolant discharge port is supplied to the stator core on the inner peripheral surface of the ring member. An air gap between the rotor and the rotor or a slope or a step that leads to a coil end of the coil is formed.

  In addition, an inclined surface or a step portion for guiding the refrigerant from the refrigerant discharge port to the coil end is formed on an inner peripheral surface of the ring member corresponding to the teeth, and a slot formed between the teeth. An inclined surface or a step portion for guiding the refrigerant from the refrigerant discharge port to the air gap is formed on the inner peripheral surface of the ring member corresponding to.

  ADVANTAGE OF THE INVENTION According to this invention, a suitable refrigerant | coolant can be supplied over the stator circumferential direction whole periphery of a rotary electric machine. In particular, the refrigerant can be supplied in different directions according to the portion corresponding to the teeth and the portion corresponding to the slots in the circumferential direction of the stator, and an appropriate refrigerant corresponding to each portion can be supplied.

It is sectional drawing which shows schematic structure of the rotary electric machine which concerns on 1st Embodiment. It is a disassembled perspective view which shows the relationship between a tooth | gear, a coil, and a ring member about one tooth. It is sectional drawing which shows schematic structure of the rotary electric machine which concerns on 2nd Embodiment. It is sectional drawing which shows schematic structure of the rotary electric machine which concerns on 3rd Embodiment. It is sectional drawing which shows schematic structure of the rotary electric machine which concerns on 4th Embodiment. It is sectional drawing which shows schematic structure of the rotary electric machine which concerns on 5th Embodiment. It is a disassembled perspective view which shows the relationship between the teeth, coil, and ring member which concern on 6th Embodiment. It is sectional drawing which shows schematic structure of the rotary electric machine which concerns on 6th Embodiment.

  The rotating electrical machine in the first embodiment is, for example, a motor generator mounted on a hybrid vehicle, an electric vehicle, or the like. As shown in FIG. 1, the motor generator 1 includes an annular stator 10 and a rotor 20 disposed inside the stator 10. An air gap G having a predetermined interval is formed between the inner peripheral surface of the stator 10 and the outer peripheral surface of the rotor 20.

  The stator 10 includes a stator core 11, a plurality of teeth 12 protruding from the inner peripheral portion of the stator core 11 and arranged at equal intervals in the circumferential direction, a coil 13 wound around the teeth 12, a stator A slot 16 (see FIG. 7) formed between teeth 12 adjacent to each other in the circumferential direction, and a ring fixed to axial end surfaces 12a and 12b at the tip on the inner circumferential side from the winding position of the coil 13 of the teeth 12. Members 14 and 15 are provided.

  The stator core 11 is configured by laminating a plurality of electromagnetic steel sheets punched into a substantially annular shape in the axial direction and integrally connecting them. The coil 13 includes coil ends 13 a and 13 b that protrude outward from the axial end faces 12 a and 12 b of the tooth 12.

  As shown in FIGS. 1 and 2, the ring member 14 is an annular member that is bonded and fixed to the axial end face 12 a of the inner peripheral side tip portion of the tooth 12 with an adhesive. The ring member 14 is formed of a resin material having electrical insulation and heat resistance such as epoxy resin and polyimide resin.

  The ring member 14 includes a coil contact surface 14a that contacts the end surface of the coil 13, a tooth contact surface 14b that contacts the axial end surface 12a of the tooth 12, and a radially inner side from the inner end edge 14b1 of the tooth contact surface 14b. And a tapered surface 14c inclined toward the surface. The coil contact surface 14a of the ring member 14 is the outer peripheral surface of the ring member 14, and a tapered surface 14c is formed on the inner peripheral surface opposite to the outer peripheral surface. That is, by forming the tapered surface 14 c, the cross-sectional shape of the ring member 14 is formed in a substantially wedge shape that narrows toward the center of the stator core 11.

  The ring member 15 is bonded and fixed to the axial end surface 12 b of the inner peripheral side tip portion of the tooth 12, and is formed in the same manner as the ring member 14. The taper surface 15c of the ring member 15 is inclined radially inward from the inner end edge 15b1 of the tooth contact surface 15b. By forming the tapered surface 15 c, the cross-sectional shape of the ring member 15 is also formed in a substantially wedge shape that becomes narrower toward the center of the stator core 11.

  As shown in FIG. 1, the rotor 20 includes a hollow rotating shaft 21, a rotor core 22 fixed to the outer periphery of the rotating shaft 21, and a permanent magnet 23 embedded in the rotor core 22. As with the stator core 11, the rotor core 22 is configured by laminating a plurality of electromagnetic steel sheets each punched into a substantially annular shape in the axial direction and integrally connecting them. Further, the rotor core 22 has substantially the same axial length as the stator core 11, and axial end faces are substantially flush with each other. The permanent magnet 23 is a plate-like member having substantially the same length as the axial direction of the rotor core 22. A plurality of permanent magnets 23 are provided in the vicinity of the outer periphery in the circumferential direction of the rotor core 22 around the rotating shaft 21.

  Inside the rotating shaft 21, there is provided a refrigerant passage 21a to which ATF (refrigerant) is supplied from an oil pump (not shown). The refrigerant flow path 21 a is formed using a hollow portion of the rotating shaft 21. On the peripheral surface of the rotating shaft 21, a coolant channel 21 b that opens in the radial direction is provided.

  A refrigerant flow path 22a that communicates with the refrigerant flow path 21b is provided in the rotor core 22 at a position corresponding to the refrigerant flow path 21b. The refrigerant flow path 22a extends in the radial direction. Inside the rotor core 22, a coolant channel 22 b that penetrates the rotor core 22 in the axial direction is provided. The opening of the end surface of the rotor core 22 of the refrigerant flow path 22b forms a refrigerant discharge port 22c. The refrigerant channel 22b communicates with the refrigerant channel 22a.

  A plurality of refrigerant channels 21 b, refrigerant channels 22 a, and refrigerant channels 22 b are provided in the circumferential direction of the rotor 20. Then, ATF pumped from an oil pump (not shown) is discharged from the refrigerant discharge port 22c through the refrigerant flow paths 21a, 21b, 22a, and 22b as indicated by arrows F1, 2, and 3 in the figure.

  Next, cooling of the motor generator 1 by ATF will be described. The ATF discharged from the refrigerant discharge port 22c is scattered toward the stator 10 by the rotational centrifugal force of the rotor 20 as indicated by an arrow F4 in the figure. At this time, the ATF is scattered over the entire circumference of the rotor 20 by the rotational centrifugal force.

  Since the rotor core 22 and the stator core 11 are substantially flush with each other in the axial direction, the ATF scatters toward the ring members 14 and 15, and the tapered surfaces 14 c and 15 c of the ring members 14 and 15. Collide with. The ATF that has collided is guided to the air gap G by the tapered surfaces 14c and 15c as indicated by an arrow F5 in the figure. That is, since the tapered surfaces 14c and 15c of the ring members 14 and 15 are formed over the entire circumference of the stator 10, the ATF that collides with the tapered surfaces 14c and 15c is substantially uniform from the entire circumference of the ring members 14 and 15. Into the air gap G.

  Thus, since ATF is supplied into the air gap G substantially uniformly over the entire circumference of the air gap G, the stator 10 and the rotor 20 can be cooled substantially uniformly over the entire circumference. Further, since ATF is supplied to the air gap G where heat is easily trapped, the stator 10 and the rotor 20 can be efficiently cooled at the same time.

  In particular, since ATF is supplied to the air gap G, the outer peripheral surface of the rotor 20 is cooled, so that the permanent magnets 23 arranged in the vicinity of the outer periphery of the rotor 20 can be efficiently cooled, and the permanent magnets 23 Can suppress demagnetization when the temperature becomes high. For this reason, the usage-amount of the high-cost heavy rare earth which can maintain a coercive force even at high temperature can be reduced, and the cost of the permanent magnet 23 can be reduced.

  Moreover, since the ring members 14 and 15 are being fixed to the axial direction end surfaces 12a and 12b of the teeth 12, the coil 13 can be prevented from coming out radially inward. Furthermore, since the ring members 14 and 15 are in contact with the end surface of the coil 13 at the coil contact surfaces 14a and 15a, the coil 13 can be prevented from falling inward in the radial direction.

  Next, a second embodiment will be described with reference to FIG. In FIG. 3, the same components as those shown in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described. The ring members 30 and 31 of the second embodiment are different in shape from the ring members 14 and 15 of the first embodiment.

  As shown in FIG. 3, the ring member 30 protrudes toward the rotor 20, a coil contact surface 30 a that contacts the end surface of the coil 13, a tooth contact surface 30 b that contacts the axial end surface 12 a of the tooth 12, and the like. And a ridge 30c.

  The protrusion 30 c is provided over the entire periphery of the ring member 30 on the axial end surface side of the inner peripheral surface of the ring member 30. For this reason, the step part is formed in the inner peripheral surface of the ring member 30 by the protrusion 30c. As a result, the cross-sectional shape of the ring member 30 is formed in a substantially L shape. The ring member 31 is formed in the same manner as the ring member 30.

  Next, cooling of the motor generator 1 by ATF will be described. In FIG. 3, ATF (indicated by arrow F <b> 4) that scatters from the coolant discharge port 22 c of the rotor core 22 toward the ring members 30 and 31 collides with the inner peripheral surfaces of the ring members 30 and 31. Since the ring members 30 and 31 are provided with protrusions 30c and 31c, the ATF that has collided with the inner peripheral surface is guided to the air gap G as indicated by an arrow F5 in the figure. That is, since the protrusions 30c and 31c of the ring members 30 and 31 are formed over the entire circumference of the stator 10, the ATF that has collided with the inner peripheral surface of the ring members 30 and 31 is directed toward the end face side in the axial direction. Scattering is blocked and the air is guided from the entire circumference of the ring members 30 and 31 into the air gap G substantially uniformly.

  Thus, the same effect as 1st Embodiment can be acquired also by the ring members 30 and 31 in 2nd Embodiment. The protrusions 30c and 31c of the ring members 30 and 31 may be stepped.

  Next, a third embodiment will be described with reference to FIG. In FIG. 4, the same components as those in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described. In the third embodiment, the configuration of the refrigerant flow path of the rotor 20 is different.

  As shown in FIG. 4, a refrigerant flow path 21 c that opens in the radial direction is provided on a circumferential surface corresponding to the end face in the axial direction of the rotor core 22 of the rotating shaft 21. The refrigerant channel 21c communicates with the refrigerant channel 21a, and the opening of the refrigerant channel 21c serves as a refrigerant discharge port. That is, in the third embodiment, no coolant channel is formed inside the rotor core 22.

  Next, cooling of the motor generator 1 by ATF will be described. In FIG. 4, when ATF is discharged from the opening of the refrigerant flow path 21 c of the rotating shaft 21, the ATF is scattered toward the ring members 14 and 15. The scattered ATF collides with the tapered surfaces 14c and 15c of the ring members 14 and 15. Thereafter, as in the first embodiment, the ATF is guided to the air gap G as indicated by an arrow F7 in the figure. As described above, even if the ATF is directly scattered from the rotating shaft 21, the same effects as those of the first embodiment can be obtained.

  Next, a fourth embodiment will be described with reference to FIG. In FIG. 5, the same components as those in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described.

  As shown in FIG. 5, in the fourth embodiment, the tapered surfaces 40 c and 41 c of the ring members 40 and 41 are inclined from the tips of the teeth 12 toward the coil ends 13 a and 13 b. That is, the cross-sectional shape of the ring member 40 is formed in a substantially wedge shape that narrows toward the coil end 13a by the tapered surface 40c. That is, unlike the tapered surface 14c of the ring member 14 of the first embodiment, the tapered surface 40c of the ring member 40 of the fourth embodiment is an inclined surface that approaches the coil end 13a toward the coil end 13a. The ring member 41 is formed in the same manner as the ring member 40.

  Next, cooling of the motor generator 1 by ATF will be described. In FIG. 5, ATF (indicated by arrow F <b> 4) that scatters from the coolant discharge port 22 c of the rotor core 22 toward the ring members 40 and 41 collides with the tapered surfaces 40 c and 41 c of the ring members 40 and 41.

  The ATF that has collided is guided to the coil ends 13a and 13b by the tapered surfaces 40c and 41c and supplied to the coil ends 13a and 13b as indicated by an arrow F8 in the figure. Since the taper surfaces 40c and 41c of the ring members 40 and 41 are formed over the entire circumference of the stator 10, the ATF that collides with the taper surfaces 40c and 41c is substantially uniformly coiled from the entire circumference of the ring members 40 and 41. It is guided to the ends 13a and 13b and supplied.

  For this reason, ATF is supplied substantially uniformly without variation over the entire circumference of the coil ends 13a and 13b. Further, the ATF is supplied to the coil ends 13a and 13b, so that the coil 13 can be intensively cooled, and the cooling performance of the coil 13 can be improved.

  In particular, since the amount of ATF supplied to the air gap G is reduced, the air gap G is prevented from being filled with ATF, and the drag loss of the rotor 20 can be suppressed. By suppressing drag loss, rotation loss of motor generator 1 can also be suppressed, and drive efficiency can be improved.

  Next, a fifth embodiment will be described with reference to FIG. In FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, description thereof will be omitted, and different components will be described. 6, the coil 13 has a lead wire (not shown) protruding from the coil 13 on one side (left side in the drawing) in the axial direction. That is, in FIG. 6, the left side of the coil 13 in the drawing is the lead side, and the right side in the drawing is the anti-lead side.

  As shown in FIG. 6, the ring member 14 of the first embodiment is fixed to the end surface of the tooth 12 on the opposite lead side, and the ring of the fourth embodiment is fixed to the end surface of the tooth 12 on the lead side. The member 41 is fixed. That is, the tapered surface 14c of the ring member 14 has a shape that guides ATF to the air gap G, and the tapered surface 41c of the ring member 41 has a shape that guides ATF to the coil end 13b.

  Next, cooling of the motor generator 1 by ATF will be described. In FIG. 6, ATF (indicated by arrow F <b> 4) that scatters from the coolant discharge port 22 c of the rotor core 22 toward the ring members 14 and 41 collides with the tapered surfaces 14 c and 41 c of the ring members 14 and 41.

  The ATF that has collided with the tapered surface 14c of the ring member 14 flows into the air gap G from the other side (right side in the drawing) in the axial direction, as indicated by an arrow F9 in the drawing, and cools the stator 10 and the rotor 20. Thereafter, the ATF is discharged from the other side of the air gap G in the axial direction to the outside of the air gap G.

  On the other hand, the ATF that has collided with the tapered surface 41c of the ring member 41 is guided to the coil end 13b and supplied to the coil end 13b as indicated by an arrow F8 in the figure. At this time, the ATF discharged from the air gap G is mixed, the amount of ATF supplied to the coil end 13b is increased, and a large amount of ATF is supplied to the coil end 13b.

  As described above, the ATF is supplied substantially uniformly throughout the air gap G over the entire circumference of the air gap G, and is also supplied substantially uniformly over the entire circumference of the coil end 13b. As a result, the stator 10 and the rotor 20 can be cooled by the ATF flowing through the air gap G, and the coil end 13b can be intensively cooled by the ATF supplied to the coil end 13b. In particular, since the amount of ATF supplied to the air gap G is reduced as compared with the first embodiment, drag loss of the rotor 20 can be suppressed.

  The ATF is supplied from the non-lead side (the other side) to the air gap G, but the ATF is supplied from the lead side (the one side) to the air gap G and supplied toward the coil end 13a. Also good.

  As described above, in any of the embodiments, the ATF is supplied to the coil ends 13a, 13b and the air gap G almost uniformly over the entire circumference of the motor generator 1, so that the stator 10, the coil 13, and the The rotor 20 can be cooled substantially uniformly in the circumferential direction. As a result, the temperature rise of the motor generator 1 can be suppressed, and the cooling performance of the motor generator 1 can be improved.

  Further, by improving the cooling performance of the motor generator 1, the amount of current supplied to the motor generator 1 can be increased, and the drive output of the motor generator 1 can be improved. Furthermore, the improvement in the cooling performance of the motor generator 1 eliminates the need to reduce the current density of the coil 13 due to the increase in the size of the motor generator 1, and the motor generator 1 can be downsized.

  Next, a sixth embodiment will be described with reference to FIGS. FIG. 7 is an exploded perspective view showing the relationship between the teeth 12, the coil 13, and the ring member 50. FIG. 8 is a schematic cross-sectional view of the rotating electrical machine in the slot 16. 7 and 8, the same components as those in FIG. 1 are denoted by the same reference numerals, the description thereof is omitted, and different configurations will be described.

  As shown in FIG. 7, a ring member 50 is fixed to the inner circumferential tip of the tooth 12 on one end side of the stator core 11. And in 6th Embodiment, the taper surface 50t which inclines toward the coil end 13a from the front-end | tip of the teeth 12 is formed in the part corresponding to the teeth 12 among the internal peripheral surfaces of the ring member 50. As shown in FIG. That is, the cross-sectional shape of the portion corresponding to the teeth 12 of the ring member 50 is formed in a substantially wedge shape that narrows toward the coil end 13a by the tapered surface 50t.

  Further, a tapered surface 50 s that is inclined from the inner end edge in the stator axial direction of the ring member 50 toward the slot 16 is formed in a portion corresponding to the slot 16 on the inner peripheral surface of the ring member 50. That is, the cross-sectional shape of the portion corresponding to the slot 16 of the ring member 50 is formed in a substantially wedge shape that narrows toward the center of the stator core 11 by the tapered surface 50 s. That is, in the ring member 50, the inclination directions of the tapered surfaces 50 t and 50 s are different between the portion corresponding to the tooth 12 and the portion corresponding to the slot 16. Further, a ring member 51 (see FIG. 8) similar to the ring member 50 is fixed to the inner circumferential tip of the tooth 12 on the other end side of the stator core 11.

  Next, cooling of the motor generator 1 by ATF will be described. The cross section in the stator axial direction at the portion corresponding to the teeth 12 is the same as that shown in FIG. 5 (respective symbols of the ring members 40, 40c, 41, 41c are replaced with symbols of the ring members 50, 50t, 51, 51t, respectively). ), A cross section in the stator axial direction at a portion corresponding to the slot 16 is as shown in FIG. The flow of ATF will be described with reference to FIGS.

  5 and 8, ATF (indicated by an arrow F4) scattered from the refrigerant discharge port 22c of the rotor core 22 toward the ring members 50 and 51 collides with the tapered surfaces 50t and 51s of the ring members 50 and 51. The ATF that has collided with the taper surfaces 50t and 51t of the ring member 50 is guided to the coil ends 13a and 13b by the taper surfaces 50t and 51t and supplied to the coil ends 13a and 13b as shown by an arrow F8 in FIG. Is done.

  On the other hand, the ATF that has collided with the tapered surfaces 50 s and 51 s of the ring member 50 is surrounded by the coil 13 in the slot 16 and the outer peripheral surface of the rotor 20 by the tapered surfaces 50 s and 51 s as shown by the arrow F 10 in FIG. Supplied to the air gap G1. The air gap G1 is a wider space than the air gap G, and the ATF cools the stator core 11 and the rotor 20 by scattering the air gap G1.

  Thus, in the sixth embodiment, the ATF is supplied to the coil ends 13a and 13b in the portion corresponding to the teeth 12 in the circumferential direction of the stator, and the coil 13 can be cooled. In the portion corresponding to the slot 16, the ATF is Is supplied to the air gap G1 to cool the stator core 11 and the rotor 20. That is, the stator core 11, the coil 13, and the rotor 20 can be appropriately cooled in a well-balanced manner. Further, since the air gap G1 is wider than the air gap G, it is difficult to fill with the ATF, and the drag loss of the rotor 20 can be suppressed.

  Further, instead of the tapered surfaces 50t, 51t, 50s, 51s in the sixth embodiment, the protrusions of the second embodiment described above may be used. In this case, the protrusions are formed on the upper and lower ends of the inner peripheral surface of the ring member 50 corresponding to the positions of the teeth 12 and the slots 16, respectively.

  In the first to sixth embodiments, the ring members 14, 15, 30, 31, 40, 41, 50, 51 are arranged on both end surfaces in the axial direction of the teeth 12, but either one of the end surfaces The ring members 14, 15, 30, 31, 40, 41, 50, and 51 may be arranged in combination. That is, the temperature rise of the motor generator 1 due to the specifications and arrangement position of the motor generator 1 is examined in advance through experiments and simulations, and the ATF supply destination is set. Based on this setting, the ring members 14, 15, 30, 31, 40, 41, 50, 51 are appropriately combined and arranged. In this way, it is also possible to efficiently supply ATF to the part that needs to be cooled.

  DESCRIPTION OF SYMBOLS 1 Motor generator, 10 Stator, 11 Stator core, 12 Teeth, 12a, 12b Axial direction end surface, 13 Coil, 13a, 13b Coil end, 14, 15, 30, 31, 40, 41, 50, 51 Ring member, 14a, 15a 30a, 31a, 40a, 41a Coil contact surface, 14b, 15b, 30b, 31b, 40b, 41b Teeth contact surface, 14c, 15c, 40c, 41c, 50t, 51t, 50s, 51s Tapered surface, 16 slots, 20 Rotor, 21 Rotating shaft, 21a, 21b, 21c, 22a, 22b Refrigerant flow path, 22 Rotor core, 22c Refrigerant outlet, 23 Permanent magnet, 30c Projection, G, G1 Air gap.

Claims (2)

A stator core having an annular stator yoke and a plurality of teeth projecting inward from the stator yoke, a coil wound around each of the plurality of teeth, a refrigerant flow path disposed inside the stator core A rotating electrical machine that scatters the refrigerant from the refrigerant discharge port of the refrigerant flow path toward the stator core using a rotational centrifugal force of the rotor,
In each of the plurality of teeth, a ring member fixed to the axial end surface of the inner peripheral side tip portion from the winding position of the coil,
An inclined surface or a step is formed on the inner peripheral surface of the ring member to guide the refrigerant from the refrigerant discharge port to an air gap between the stator core and the rotor or a coil end of the coil. Rotating electric machine. In the rotating electrical machine according to claim 1,
A slope or a step for guiding the coolant from the coolant discharge port to the coil end is formed on an inner peripheral surface of the ring member corresponding to the teeth, and corresponds to a slot formed between the teeth. A rotating electric machine characterized in that an inclined surface or a step portion for guiding the refrigerant from the refrigerant discharge port to the air gap is formed on an inner peripheral surface of the ring member.

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