JP6263564B2 - Rotating electric machine rotor and rotating electric machine - Google Patents

Description

  The present invention relates to a rotor of a rotating electrical machine and a rotating electrical machine that can be efficiently cooled by a refrigerant.

  In recent years, in hybrid vehicles and EV vehicles in which a rotating electrical machine is used as a drive source, a temperature increase of a permanent magnet that greatly affects the performance of the rotating electrical machine has become a problem, and efficient cooling has become a problem. .

  A rotating electrical machine 100 described in Patent Literature 1 includes a rotor 101 and a stator 110 as shown in FIG. The rotor 101 is supported by a case 103 by a rotating shaft 102, a rotor core 104 formed by laminating a plurality of magnetic steel plates 104a, a plurality of permanent magnets 105 fixed to the rotor core 104 at intervals, and a rotor core 104. And end plates 106 arranged on both sides in the axial direction. In the rotating electrical machine 100, the stator 110 is arranged on the outer side in the radial direction of the rotor 101 and is fixed to the case 103, and the end plate 106 of the rotor 101 that is rotating from the refrigerant supply unit 111 that is also fixed to the case 103. The rotor 101 is cooled by supplying the coolant to the end face of the rotor.

Japanese Patent No. 5601504

  However, in the rotating electrical machine 100 described in Patent Document 1, the rotor 101, in particular, the permanent magnet 105 in which demagnetization due to temperature rise is a problem is cooled through the end plates 106 that cover both end faces of the rotor core 104. There was a problem of low efficiency. In addition, the refrigerant supplied from the refrigerant supply unit 111 interferes with the end plate 106 and scatters, so that the permanent magnet 105 that requires the most cooling is hardly cooled, and there is room for improvement.

  An object of the present invention is to provide a rotor of a rotating electrical machine and a rotating electrical machine that can efficiently cool a rotor core and a permanent magnet, suppress demagnetization of the permanent magnet, and suppress performance deterioration of the rotating electrical machine.

In order to achieve the above object, the invention described in claim 1
A plurality of magnet insertion holes (for example, a magnet insertion hole 26 in an embodiment described later) are provided along the circumferential direction, and a magnetic rotor core (for example, a rotor core 24 in an embodiment described later);
A permanent magnet disposed in the magnet insertion hole (for example, a permanent magnet 25 in an embodiment described later);
An end face plate (for example, an end face plate 30 in an embodiment to be described later) disposed on both sides in the axial direction of the rotor core, and the rotation fixed to a rotation shaft (for example, the rotation shaft 22 in an embodiment to be described later). An electric rotor (for example, a rotor 20 in an embodiment described later),
The end face plate is provided with a refrigerant supply hole (for example, a refrigerant supply hole 31 in an embodiment described later) to which a liquid refrigerant is supplied,
The refrigerant supplied from the refrigerant supply hole is configured to contact the permanent magnet,
On the inner surface of the end face plate facing the permanent magnet, a refrigerant discharge passage (for example, a refrigerant discharge passage 33 in an embodiment described later) communicating with the refrigerant supply hole is provided,
The refrigerant supplied from the refrigerant supply hole is discharged through the refrigerant discharge path,
The refrigerant supply hole is a demagnetization weakest portion of the permanent magnet (for example, an outer diameter in an embodiment described later) that is closest to the outer peripheral surface or inner peripheral surface of the rotor core facing the stator in the axial direction. Overlap with the side corners 25b), or
The refrigerant discharge path is the demagnetization weakest portion of the permanent magnet that is closest to the outer peripheral surface or inner peripheral surface of the rotor core facing the stator (for example, the outer-diameter side corner portion 25b in the embodiment described later). Pass through .

In the invention according to claim 2 , in the invention according to claim 1 ,
The refrigerant supply hole has an arc shape.

In the invention according to claim 3 , in the invention according to claim 1 or 2 ,
The refrigerant supply hole overlaps with the permanent magnet as viewed in the axial direction.

In the invention according to claim 4 ,
A rotor (for example, a rotor 20 in an embodiment described later) of the rotating electrical machine according to any one of claims 1 to 3 ,
A stator (for example, a stator 50 in an embodiment described later) opposed to the rotor in the radial direction;
A housing for housing the rotor and the stator (for example, a housing 40 in an embodiment described later);
A rotating electrical machine (for example, a rotating electrical machine 10 in an embodiment described later) provided with a rotating shaft (for example, a rotating shaft 22 in an embodiment described later) rotatably supported by the housing,
The casing is provided with a refrigerant discharge part (for example, a refrigerant discharge part 41 in an embodiment described later) for supplying the refrigerant to the refrigerant supply hole.

Further, in the invention according to claim 5 , in the invention according to claim 4 ,
The refrigerant discharge direction from the refrigerant discharge part is parallel to the rotation axis direction.

According to the first aspect of the invention, the refrigerant supplied to the refrigerant supply hole provided in the end face plate comes into contact with the permanent magnet, whereby the permanent magnet can be efficiently cooled and demagnetization can be suppressed. .
Further, by providing the refrigerant discharge path, it is possible to suppress the stagnation of the refrigerant and efficiently cool the rotor core that comes into contact with the permanent magnet and the refrigerant in the refrigerant discharge path.
Furthermore, the weakest demagnetization part of the permanent magnet in which demagnetization is likely to occur can be cooled, and the performance deterioration of the rotating electrical machine can be suppressed.

According to the second aspect of the invention, since the refrigerant supply hole has an arc shape, the permanent magnet and the refrigerant supply hole are efficiently utilized by utilizing the centrifugal force of the rotor while maintaining the function of holding the permanent magnet by the end face plate. The rotor core in contact with the refrigerant inside can be cooled.

According to invention of Claim 3 , a permanent magnet can be cooled efficiently.

According to the invention described in claim 4 , the permanent magnet can be efficiently cooled and demagnetization can be suppressed when the refrigerant supplied to the refrigerant supply hole provided in the end face plate contacts the permanent magnet. .

According to the fifth aspect of the present invention, friction can be reduced and performance deterioration of the rotating electrical machine can be suppressed.

It is sectional drawing of the rotary electric machine which concerns on one Embodiment of this invention. It is a disassembled perspective view of a rotor. It is a principal part side view of the rotor which shows the positional relationship of the permanent magnet arrange | positioned by V shape at a rotor core, and the refrigerant | coolant supply hole and refrigerant | coolant discharge path of an end surface plate. It is a principal part expanded sectional view of a rotor. (A) is a principal part side view of the rotor of a 1st modification, (b) is a principal part side view of the rotor of a 2nd modification. (A) is a principal part side view of the rotor of a 3rd modification, (b) is a principal part side view of the rotor of a 4th modification, (c) is a principal part side view of the rotor of a 5th modification. FIG. (A) is a principal part side view of the rotor of a 6th modification, (b) is a principal part side view of the rotor of a 7th modification. 2 is a cross-sectional view illustrating a configuration of a rotating electrical machine described in Patent Document 1.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the rotating electrical machine 10 according to the present embodiment is fixed to the rotor 20 and the housing 40, and is disposed to face the outer side in the radial direction of the rotor 20 with a slight gap. A so-called inner rotor type rotating electrical machine.

  The rotor 20 includes a rotary shaft 22 that is rotatably supported by a housing 40 by a bearing 21, a rotor core 24 that is fitted and fixed to an outer peripheral surface 23a of a substantially bowl-shaped support member 23 that is fixed to the rotary shaft 22, and a rotor core. 24, a plurality of permanent magnets 25 embedded in 24, and end face plates 30 fixed to both end faces of the rotor core 24.

  The rotor core 24 is formed by laminating a plurality of magnetic steel plates (for example, electromagnetic steel plates) 24a formed in an annular shape of the same shape in the direction of the rotation axis, and a plurality (24 in the embodiment shown in FIG. 2). A magnet insertion hole 26 is provided penetrating in the rotation axis direction.

  The plurality of magnet insertion holes 26 are formed in a substantially V shape so as to open toward the outer peripheral direction of the rotor core 24, and are formed at predetermined intervals for each pair of magnet insertion holes 26 that open in a substantially V shape toward the outer periphery. Has been. The permanent magnet 25 is inserted into each magnet insertion hole 26 while changing the direction of the magnetic pole for each pair of magnet insertion holes 26, and is fixed by a filler.

  In the magnet insertion hole 26, a gap for preventing magnetic flux short-circuiting is formed continuously at the end of the rotor core 24 near the outer peripheral surface 24 b. Also, a magnetic flux short-circuit prevention gap is formed continuously at the end of the rotor core 24 on the side close to the inner peripheral surface 24c. Therefore, when the permanent magnet 25 is inserted into the magnet insertion hole 26 and fixed by the filler, the magnetic flux short-circuit prevention portions 27 and 28 are provided at both ends of the permanent magnet 25 (see FIG. 3).

  3 and 4, end face plates 30 are fixed to both end faces of the rotor core 24. The end face plate 30 is formed in an annular shape having the same shape as the steel plate 24a, and a plurality of refrigerant supply holes 31 are provided through the inner surface and the outer surface. Each refrigerant supply hole 31 is provided corresponding to a pair of magnet insertion holes 26 arranged in a V shape. That is, one refrigerant supply hole 31 corresponds to a pair of permanent magnets 25 arranged in a V shape.

  The refrigerant supply hole 31 has a center on the rotating shaft 22 side, and has a circular arc shape that protrudes toward the outer peripheral surface 24b of the rotor core 24. The refrigerant supply hole 31 and the pair of permanent magnets 25 arranged in a V shape when viewed in the axial direction. The parts overlap. Thereby, a part of the side surface of the permanent magnet 25 is exposed from the coolant supply hole 31. In other words, at least another part of the side surface of the permanent magnet 25 overlaps the end face plate 30 when viewed in the axial direction, and prevents the permanent magnet 25 from falling off from the magnet insertion hole 26.

  In addition, the end face plate 30 has a discharge groove 32 that opens in a substantially V shape toward the outer peripheral direction of the end face plate 30 on the inner surface of the end face plate 30 on the rotor core 24 side when fixed to the rotor core 24. 31 is formed in communication. A pair of discharge grooves 32 is provided for one refrigerant supply hole 31. Therefore, when the end face plate 30 is fixed to the rotor core 24, a coolant discharge path 33 that connects the coolant supply hole 31 and the outside is formed by the discharge groove 32 between the end face plate 30 and the rotor core 24.

  The discharge groove 32 is formed in a substantially V shape so as to extend along the outer peripheral long side 25a of each of the pair of permanent magnets 25 arranged in a V shape. Each discharge groove 32 is provided so as to overlap with the outer-diameter side corner portion 25b of the permanent magnet 25 having the shortest distance from the outer peripheral surface 24b of the rotor core 24 when viewed in the axial direction. The outer diameter side corner portion 25b of the permanent magnet 25 is the weakest demagnetization portion where the magnetic force of the permanent magnet 25 tends to decrease due to the influence of the magnetic force from the stator 50.

  Returning to FIG. 1, the stator 50 is wound around a stator core 51 formed by laminating a plurality of magnetic steel plates (for example, electromagnetic steel plates) 51 a in the rotation axis direction, and teeth (not shown) of the stator core 51. A plurality of stator coils 52. Then, when a current flows through the stator coil 52, a rotating magnetic field is generated in the stator 50 to rotate the rotor 20.

  The casing 40 is provided with a refrigerant discharge portion 41 at a portion above the rotating shaft 22 so as to face the refrigerant supply hole 31 of the end face plate 30, and the refrigerant supplied from the refrigerant supply source is supplied from the refrigerant discharge portion 41. The rotor 20 is cooled by being discharged from a direction parallel to the rotation axis direction, that is, from a direction orthogonal to the end face plate 30.

Next, the operation of the present embodiment having the above configuration will be described.
When a current is passed through the stator coil 52, a rotating magnetic field is generated and the rotor 20 is driven to rotate. The loss in efficiency of the rotating electrical machine 10 becomes heat and raises the temperature of the rotating electrical machine 10. An increase in the temperature of the rotor 20, particularly the permanent magnet 25, reduces the magnetic force of the permanent magnet 25 and contributes to the deterioration of the performance of the rotating electrical machine 10, so it is necessary to cool it efficiently.

  As shown in FIG. 1, the refrigerant supplied from a refrigerant supply source (not shown) is discharged from the refrigerant discharge portion 41 provided in the housing 40 toward the end face plate 30 and exposed from the refrigerant supply hole 31 of the end face plate 30. The permanent magnet 25 is directly contacted to cool the permanent magnet 25 efficiently. At the same time, the refrigerant cools by directly contacting a part of the rotor core 24 exposed from the refrigerant supply hole 31. Therefore, compared with the conventional rotating electrical machine 100 (see FIG. 8) that cools the rotor 101 via the end plate 106, the cooling efficiency is good and the contact area with the refrigerant is large, so that the cooling can be effectively performed. it can.

  Furthermore, the permanent magnet 25 exposed from the refrigerant supply hole 31 and the refrigerant that has cooled the rotor core 24 flow into the refrigerant discharge path 33 by the centrifugal force acting on the refrigerant, and the outer diameter side angle of the permanent magnet 25 in the refrigerant discharge path 33. The part 25 b and the rotor core 24 are cooled and discharged in the outer diameter direction of the rotor 20. Centrifugal force acts on the refrigerant in the refrigerant supply hole 31 and the refrigerant discharge path 33, so that there is no stagnation in the refrigerant supply hole 31 and the refrigerant discharge path 33, and a new refrigerant is always supplied and cooled to achieve high cooling. Efficiency is maintained.

  Thus, the permanent magnet 25 exposed from the refrigerant supply hole 31 is cooled by direct contact with the refrigerant discharged from the refrigerant discharge portion 41, and the outer diameter side corner portion 25b which is the weakest demagnetization portion of the permanent magnet 25. However, since it is cooled by the refrigerant flowing through the refrigerant discharge path 33 by centrifugal force, it can be efficiently cooled. Thereby, the demagnetization of the permanent magnet 25 is suppressed, and the performance degradation of the rotary electric machine 10 is suppressed.

  Moreover, since the refrigerant from the refrigerant discharge part 41 is discharged from the direction perpendicular to the end face plate 30, the frictional force with the refrigerant is small, and the influence on the rotational force of the rotor 20 can be minimized.

  As described above, according to the rotor 20 of the rotating electrical machine according to the present embodiment, the end face plate 30 is provided with the refrigerant supply hole 31 to which the refrigerant is supplied, and the refrigerant supplied from the refrigerant supply hole 31 is Since it is configured to come into contact with the permanent magnet 25, the permanent magnet 25 can be efficiently cooled by directly contacting the permanent magnet 25 with the coolant supplied to the coolant supply hole 31 provided in the end face plate 30. And demagnetization of the permanent magnet 25 can be suppressed.

  A refrigerant discharge path 33 communicating with the refrigerant supply hole 31 is provided on the inner surface of the end face plate 30 facing the permanent magnet 25, and the refrigerant supplied from the refrigerant supply hole 31 is discharged through the refrigerant discharge path 33. Thus, the retention of the refrigerant is suppressed, and the rotor core 24 that contacts the refrigerant in the permanent magnet 25 and the refrigerant discharge path 33 can be efficiently cooled by the newly supplied refrigerant.

  Further, since the refrigerant supply hole 31 has an arc shape, the refrigerant in the permanent magnet 25 and the refrigerant supply hole 31 can be efficiently utilized using the centrifugal force of the rotor 20 while maintaining the function of holding the permanent magnet 25 by the end face plate 30. The rotor core 24 in contact with can be cooled.

  Further, the refrigerant discharge path 33 passes through the outer-diameter side corner portion 25b which is the weakest demagnetization portion of the permanent magnet 25 and has the shortest distance from the outer peripheral surface 24b of the rotor core 24 facing the stator 50. It is possible to cool the outer-diameter-side corner 25b of the permanent magnet 25 that is liable to generate, and the performance deterioration of the rotating electrical machine 10 can be suppressed.

  Moreover, since the refrigerant supply hole 31 overlaps with the permanent magnet 25 as viewed in the axial direction, the permanent magnet 25 can be efficiently cooled by bringing the refrigerant into direct contact with the permanent magnet 25.

  Moreover, since the refrigerant | coolant discharge direction from the refrigerant | coolant discharge part 41 is parallel to a rotating shaft direction, the friction by a refrigerant | coolant can be reduced and the performance deterioration of the rotary electric machine 10 can be suppressed.

Hereinafter, each modification of the present invention will be described.
(First modification)
Fig.5 (a) is a principal part side view of the rotor of a 1st modification provided with the permanent magnet arrange | positioned substantially V-shaped.
The rotor 20 of the first modification is formed in an arc shape in which the refrigerant supply hole 31 of the end face plate 30 has a center radially outward of the rotor 20 and protrudes toward the center of the rotor 20. The refrigerant supply hole 31 overlaps the inner diameter side corner 25c of the permanent magnet 25 having the shortest distance from the inner peripheral surface 24c of the rotor core 24, and a part of the permanent magnet 25 is exposed from the refrigerant supply hole 31.

  A discharge groove 32 that communicates with the refrigerant supply hole 31 and forms a refrigerant discharge path 33 in cooperation with the rotor core 24 passes through the outer diameter side corner (demagnetization weakest part) 25 b of the permanent magnet 25. It is formed in a substantially V shape. Other than that, since it is the same as the rotor 20 of the embodiment, the same or equivalent parts will be denoted by the same or corresponding symbols, and the description will be simplified or omitted.

  According to the rotor 20 of the first modified example, the inner diameter side corner portion 25c can be simultaneously cooled together with the outer diameter side corner portion 25b which is the weakest demagnetization portion of the permanent magnet 25 which is likely to be demagnetized. The performance deterioration of the electric machine 10 can be suppressed. In the case of an outer rotor type rotating electrical machine, the inner diameter side corner portion 25c of the permanent magnet 25 is the weakest demagnetizing portion, and therefore this modification is also effective in an outer rotor type rotating electrical machine. Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

(Second modification)
FIG.5 (b) is a principal part side view of the rotor of the 2nd modification provided with the permanent magnet arrange | positioned substantially V-shaped.
In the rotor 20 of the second modification, the refrigerant supply hole 31 of the end face plate 30 is substantially circular, and is formed at a position corresponding to the outer diameter side corner (demagnetization weakest part) 25 b of each permanent magnet 25. The outer diameter side corner portion 25 b is exposed from the refrigerant supply hole 31. Further, the discharge groove 32 that forms the refrigerant discharge path 33 is formed so that the width decreases as it extends from the refrigerant supply hole 31 to the outer diameter side.

  According to the rotor 20 of the second modified example, the outer diameter side corner portion 25b which is the weakest demagnetization portion of the permanent magnet 25 can be directly cooled with the refrigerant. Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

(Third Modification)
Fig.6 (a) is a principal part side view of the rotor of the 3rd modification provided with the permanent magnet arrange | positioned substantially V-shaped.
The end face plate 30 of the rotor 20 of the third modified example is not provided with the discharge groove 32, has a center on the rotating shaft 22 side, and has an arc-shaped refrigerant supply hole that protrudes toward the outer peripheral surface 24 b of the rotor core 24. Only 31 is formed. The refrigerant supply hole 31 is formed radially outward as compared with the end face plate 30 of the embodiment shown in FIG. 3, and the outer diameter side corner portion 25 b of the permanent magnet 25 is exposed from the refrigerant supply hole 31. . Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

(Fourth modification)
FIG.6 (b) is a principal part side view of the rotor of the 4th modification provided with the permanent magnet arrange | positioned substantially V-shaped.
The end face plate 30 of the rotor 20 of the fourth modified example does not include the discharge groove 32, and the refrigerant supply hole 31 has a center radially outward of the rotor 20 and is convex toward the center of the rotor 20. It is formed in an arc shape. The refrigerant supply hole 31 overlaps the outer diameter side corner portion 25b of the permanent magnet 25 having the closest distance to the outer peripheral surface 24b of the rotor core 24 and is open to the outer peripheral surface 24. Therefore, no separate discharge groove 32 is provided. Both can discharge the refrigerant. Thereby, the outer-diameter side corner | angular part 25b which is a demagnetization weakest part of the permanent magnet 25 can be cooled efficiently. Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

(5th modification)
FIG.6 (c) is a principal part side view of the rotor of the 5th modification provided with the permanent magnet arrange | positioned substantially V-shaped.
The end face plate 30 of the rotor 20 of the fifth modified example is formed in a circular shape at a position where the refrigerant supply hole 31 of the end face plate 30 corresponds to the outer diameter side corner portion (demagnetization weakest portion) 25 b of the permanent magnet 25. In addition, the outer diameter side corner portion 25 b is exposed from the refrigerant supply hole 31. Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

(Sixth Modification)
Fig.7 (a) is a principal part side view of the rotor of the 6th modification by which the permanent magnet was arrange | positioned in parallel.
In the rotor 20 of the sixth modified example, a pair of permanent magnets 25 arranged in parallel constitute one magnetic pole, and a plurality of magnetic poles are provided apart from each other in the circumferential direction. The refrigerant supply hole 31 of the end face plate 30 has a center on the rotating shaft 22 side and is formed in an arc shape that protrudes toward the outer peripheral surface 24 b of the rotor core 24. A discharge groove 32 that communicates with the refrigerant supply hole 31 and forms a refrigerant discharge path 33 in cooperation with the rotor core 24 passes through the outer diameter side corner (demagnetization weakest part) 25b of the permanent magnet 25 and is substantially V. It is formed in a letter shape. Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

(Seventh Modification)
FIG.7 (b) is a principal part side view of the rotor of the 7th modification provided with the permanent magnet arrange | positioned substantially reverse V shape.
In the rotor 20 of the seventh modified example, a pair of permanent magnets 25 arranged in a substantially inverted V shape that opens in a substantially V shape toward the inner periphery constitutes one magnetic pole. The refrigerant supply hole 31 of the end face plate 30 has a center on the rotating shaft 22 side, is formed in an arc shape that is convex toward the outer peripheral surface 24b of the rotor core 24, and is closest to the outer peripheral surface 24b of the rotor core 24. An outer diameter side corner 25 b of the permanent magnet 25 is exposed from the refrigerant supply hole 31. A discharge groove 32 that forms the refrigerant discharge path 33 is formed in a substantially V-shape. Other configurations and operations are the same as those of the rotor 20 of the above embodiment.

Note that the present invention is not limited to the above-described embodiments and modifications, and modifications, improvements, and the like can be made as appropriate.
For example, the rotating electrical machine according to the present invention may be a generator, a motor generator that functions as an electric motor, or a generator in addition to the electric motor.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine 20 Rotor 22 Rotating shaft 24 Rotor core 24b Outer peripheral surface 24c Inner peripheral surface 25 Permanent magnet 25b Outer diameter side corner (demagnetization weakest part)
25c Inner diameter side corner part 26 Magnet insertion hole 30 End face plate 31 Refrigerant supply hole 32 Discharge groove 33 Refrigerant discharge path 40 Housing 41 Refrigerant discharge part 50 Stator

Claims (5)

A plurality of magnet insertion holes are provided along the circumferential direction, and a magnetic rotor core;
A permanent magnet disposed in the magnet insertion hole;
End face plates disposed on both sides in the axial direction of the rotor core, and a rotor of a rotating electrical machine fixed to a rotating shaft,
The end face plate is provided with a refrigerant supply hole for supplying a liquid refrigerant,
The refrigerant supplied from the refrigerant supply hole is configured to contact the permanent magnet,
On the inner surface of the end face plate facing the permanent magnet, a refrigerant discharge passage communicating with the refrigerant supply hole is provided,
The refrigerant supplied from the refrigerant supply hole is discharged through the refrigerant discharge path,
The refrigerant supply hole overlaps with the weakest demagnetization portion of the permanent magnet having the shortest distance from the outer peripheral surface or inner peripheral surface of the rotor core facing the stator in the axial direction, or
The rotor of a rotating electrical machine, wherein the refrigerant discharge path passes through a demagnetization weakest portion of the permanent magnet that is closest to an outer peripheral surface or an inner peripheral surface of the rotor core facing the stator . The rotor of the rotating electrical machine according to claim 1 ,
The refrigerant supply hole is a rotor of a rotating electric machine having an arc shape. A rotor for a rotating electrical machine according to claim 1 or 2 ,
The refrigerant supply hole is a rotor of a rotating electrical machine that overlaps with the permanent magnet as viewed in the axial direction. The rotor of the rotating electrical machine according to any one of claims 1 to 3 ,
A stator radially opposed to the rotor;
A housing for housing the rotor and the stator;
A rotating electrical machine having a rotating shaft rotatably supported by the housing,
The rotating electrical machine, wherein the casing is provided with a refrigerant discharge portion that supplies the refrigerant to the refrigerant supply hole. The rotating electrical machine according to claim 4 ,
A rotating electrical machine in which a refrigerant discharge direction from the refrigerant discharge portion is parallel to a rotation axis direction.

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