JP2018148775A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling efficiency in a rotary electric machine including coil pressing members.SOLUTION: A rotary electric machine includes: a stator 11; an iron core 21 which is rotatably supported at the radial inner side of the stator 11 and in which multiple protrusion parts 21b protruding to the radial outer side are arranged along a circumferential direction; coils 22 respectively wound around outer periphery parts of the protrusion parts 21b; coil pressing members 24, each of which is provided between the coils 22; groove parts 52, each of which is formed on a first surface 24a facing the coil 22 in the coil pressing member 24 and extends from the radial inner side to the radial outer side; and first through holes 53, each of which penetrates through the coil pressing member 24 in an axial direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electrical machine including a coil pressing member.

  A rotating electric machine uses a repulsive force and an attractive force generated between a stator and a rotor by the magnetic action of electricity, and rotates the rotor with respect to the stator. There is a salient pole type rotating electrical machine having a salient pole type rotor.

  The salient pole rotor is composed of a plurality of magnetic poles in the circumferential direction, each of which includes an iron core having a protrusion protruding radially outward with respect to the rotation axis and a winding wound around the protrusion of the iron core. The type rotary electric machine is configured such that a salient pole type rotor is rotatably provided on the radially inner side of a cylindrical stator. In such a salient pole type rotating electrical machine, there is a possibility that the winding may be deformed by the centrifugal force at the time of the rotating operation. Therefore, by providing a coil pressing member between the magnetic poles and pressing the winding, Deformation is prevented.

  Generally, in a rotating electrical machine, heat due to loss is generated, and therefore, each part of the rotating electrical machine may be overheated to cause deterioration or burnout. Therefore, the rotating electrical machine is provided with various cooling structures. The cooling structure provided in the salient pole type rotating electric machine includes, for example, a rotor winding arranged so as to face the space between the magnetic poles by supplying and circulating a cooling medium to the space between the magnetic poles (space between the magnetic poles). There are some which cool each part of the rotating electrical machine.

JP 2008-283737 A

  However, in a salient pole type rotating electrical machine having a coil pressing member, the coil pressing member becomes a resistance of the cooling medium flowing in the axial direction in the space between the magnetic poles, and the cooling medium flow efficiency, that is, the cooling efficiency in the rotating electric machine is reduced. There is a fear.

  Here, as a technique for improving the cooling efficiency in the salient pole type rotating electrical machine provided with the coil pressing member, for example, there is one described in Patent Document 1. In Patent Document 1, the coil bracket (coil holding member) is provided with a pair of ventilation grooves along the stacking direction of the field coils (windings) so that the cooling air is circulated through the ventilation grooves and the temperature of the field coil is increased. It is described that suppresses.

  However, also in the rotating electrical machine described in Patent Document 1, the coil bracket (coil holding member) becomes resistance of cooling air (cooling medium) flowing in the axial direction in the space between adjacent field coils (magnetic poles) in the circumferential direction. For this reason, there is a possibility that the flow efficiency of cooling air in the rotating electrical machine, that is, the cooling efficiency may be reduced.

  This invention is made | formed in view of the said problem, and it aims at improving the cooling efficiency in the rotary electric machine provided with the coil pressing member.

  A rotating electrical machine according to a first aspect of the present invention that solves the above-described problem is a stator and a plurality of protrusions that are rotatably supported on the radially inner side of the stator and project radially outward are arranged along the circumferential direction. Formed on the first surface facing the winding in the coil pressing member, the coil wound around the outer periphery of the projection, the coil pressing member provided between the windings, and the coil pressing member A groove portion extending from the inner side in the radial direction to the outer side in the radial direction, and a first through hole penetrating the coil pressing member in the axial direction are provided.

  A rotating electrical machine according to a second invention that solves the above-described problem is the rotating electrical machine according to the first invention, wherein the first through hole is formed in communication with the groove portion. .

  A rotating electrical machine according to a third aspect of the present invention that solves the above-described problem is the rotating electrical machine according to the first or second aspect of the invention, wherein the coil pressing member is a second penetration that communicates with the groove and the first through hole. It has a hole.

  A rotating electrical machine according to a fourth invention that solves the above-described problem is the rotating electrical machine according to the third invention, wherein the groove has a groove opening facing a second surface of the coil pressing member facing the stator. And the second through hole has a through hole opening facing the second surface, and the distance between the through hole opening and the stator is the distance between the groove opening and the stator. It is longer than the distance.

  According to the rotary electric machine according to the first aspect, since the cooling medium is circulated through the groove and the first through hole, the cooling efficiency of the coil pressing member and the winding can be improved. In addition, since the first through hole is formed so as to penetrate in the axial direction of the coil pressing member, the resistance of the cooling medium flowing in the axial direction between adjacent windings (magnetic poles) in the circumferential direction can be reduced. . That is, the distribution efficiency and cooling efficiency of the cooling medium in the rotating electrical machine can be improved.

  According to the rotating electrical machine according to the second aspect of the invention, the first through hole communicates with the groove portion, so that a part of the cooling medium flowing through the groove portion flows into the first through hole, or the first through hole. Since a part of the cooling medium flowing through the groove flows into the groove part, the distribution efficiency of the cooling medium flowing through the groove part and the first through hole can be improved.

  According to the rotating electrical machine according to the third aspect of the invention, the second through hole communicates with the groove and the first through hole so that a part of the cooling medium flowing through the groove is the first through hole and the second through hole. Part of the cooling medium flowing into the hole, flowing through the first through hole flows into the groove part and the second through hole, or part of the cooling medium flowing through the second through hole is formed into the groove part and the first through hole. Since it will flow into a hole, the distribution | circulation efficiency of the cooling medium which flows through a groove part, a 1st through-hole, and a 2nd through-hole can be improved.

  According to the rotating electrical machine according to the fourth aspect of the invention, the second through hole opens at a location where the gap (gap) between the coil pressing member and the stator is large, so that cooling that flows through the second through hole is performed. The distribution resistance of the medium can be reduced. That is, the distribution efficiency and cooling efficiency of the cooling medium in the rotating electrical machine can be improved.

It is explanatory drawing which shows the structure of the rotary electric machine which concerns on Example 1. FIG. It is explanatory drawing (II arrow line view in FIG. 1) which shows the structure of the rotary electric machine which concerns on Example 1. FIG. It is explanatory drawing which shows the structure of the rotary electric machine which concerns on Example 2. FIG. It is explanatory drawing (IV arrow line view in FIG. 1) which shows the structure of the rotary electric machine which concerns on Example 2. FIG. It is explanatory drawing which shows the structure of the rotary electric machine which concerns on Example 3. FIG. It is explanatory drawing (VI arrow line view in FIG. 1) which shows the structure of the rotary electric machine which concerns on Example 3. FIG.

  Embodiments of a rotating electrical machine according to the present invention will be described below in detail with reference to the accompanying drawings. Needless to say, the present invention is not limited to the following examples, and various modifications can be made without departing from the spirit of the present invention.

[Example 1]
The structure of the rotating electrical machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the rotating electrical machine 1 includes a substantially cylindrical stator 11 fixed to a frame (not shown) and a radial inner side of the stator 11 so as to be rotatable with respect to the stator 11. A rotor 12 is provided. In the rotating electrical machine 1, the rotor 12 is rotated with respect to the stator 11 by utilizing a repulsive force and an attractive force generated between the stator 11 and the rotor 12 by the magnetic action of electricity.

  The rotor 12 is provided with a rotor core 21 that is rotatably supported by a frame (not shown) and a rotor winding 22 that is wound around the rotor core 21. The rotor core 21 is schematically configured by a shaft portion 21a that constitutes a rotation center portion, and a plurality (four in the present embodiment) of protrusion portions 21b that protrude radially outward from the shaft portion 21a. The plurality of protrusions 21b are arranged at equiangular intervals (90 ° in this embodiment) along the circumferential direction.

  The rotor winding 22 is wound around the outer periphery of the protrusion 21b, and a head 23 for preventing the rotor winding 22 from deviating is attached to the tip (radially outer end) of the protrusion 21b. It has been. The head portion 23 has a shape in which an outer peripheral portion protrudes in the axial direction and the circumferential direction from the protruding portion 21b, and covers the rotor winding 22 from the radially outer side.

  In the rotating electrical machine 1, a magnetic pole 12 a is constituted by the protrusion 21 b, the head 23, and the rotor winding 22, and this magnetic pole 12 a is equiangular along the circumferential direction (in this embodiment, 90 °). ) Are arranged at intervals (four in this embodiment). That is, the rotor 12 is a salient pole type rotor having a plurality of magnetic poles 12 a in the circumferential direction, and the rotating electrical machine 1 is a salient pole type rotating electrical machine including the rotor 12.

  As shown in FIG. 1, the rotor 12 is provided with a coil pressing member 24 and a coil support member 25 for preventing the rotor winding 22 from being deformed by a centrifugal force when the rotor 12 rotates. Yes. The coil pressing member 24 has a trapezoidal (substantially triangular) cross section orthogonal to the rotational axis direction (axial direction) of the rotor 12, and between the magnetic poles 12 a (rotor windings 22) adjacent in the circumferential direction. The outer end surface (first surface) 24a in the width direction is disposed so as to face the outer end surface 22a in the circumferential direction of the rotor winding 22 adjacent in the circumferential direction. The coil support member 25 has a trapezoidal cross section orthogonal to the axial direction, and the outer end face 25a in the width direction is adjacent in the circumferential direction between the magnetic poles 12a (rotor windings 22) adjacent in the circumferential direction. It arrange | positions so that the radial direction inner end surface 22b of the rotor coil | winding 22 may be opposed.

  Further, the coil pressing member 24 and the coil supporting member 25 are connected by bolts 31 so as to sandwich the corners of the rotor winding 22. The coil pressing member 24 and the coil support member 25 are in contact with the rotor winding 22 via insulating plates 41 and 42, respectively.

  As shown in FIGS. 1 and 2, a bolt hole 51 into which the bolt 31 can be inserted is located in the coil pressing member 24 at the center in the width direction (vertical direction in FIG. 2) of the coil pressing member 24. A plurality (two in this embodiment) are provided side by side in the axial direction (left-right direction in FIG. 2). The bolt 31 is inserted into the bolt hole 51, and the tip of the bolt 31 is screwed into the tap hole 61 provided in the coil support member 25, whereby the coil pressing member 24 and the coil support member 25 are connected. .

  Further, a groove 52 extending from the radially inner side to the radially outer side is formed in the width direction outer end surface 24 a of the coil pressing member 24. The groove portions 52 are provided in a plurality in the axial direction on each outer end face 24a in the width direction (two in the present embodiment), and rotate in a direction perpendicular to the axial direction of the cooling air (cooling medium). It functions as a flow path that can circulate in the steel plate lamination direction (direction in which the steel plates constituting the rotor winding 22 are laminated) in the child winding 22. In the rotary electric machine 1, the cooling air flows through the groove 52, whereby the coil pressing member 24 and the rotor winding 22 are cooled.

  The coil pressing member 24 is formed with a through hole (first through hole) 53 that penetrates the coil pressing member 24 in the axial direction. The plurality of through holes 53 are provided side by side in the width direction of the coil pressing member 24 (two in the present embodiment), and function as flow paths capable of flowing cooling air (cooling medium) in the axial direction. . In the rotating electrical machine 1, the coil holding member 24 is cooled by the cooling air flowing through the through holes 53. The through hole 53 is a position spaced from the outer end surface 24 a in the width direction of the coil pressing member 24, and is formed between the bolt hole 51 and the groove portion 52.

  The operation of the rotating electrical machine according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  When the rotating electrical machine 1 is operated and the rotor 12 is rotated with respect to the stator 11, a fan (not shown) is rotated along with the rotating operation of the rotor 12 (see FIG. 1). Then, the cooling air (cooling medium) supplied by a cooling medium supply device (not shown) is a space between the magnetic poles 12a (rotor windings 22) adjacent in the circumferential direction (space between the magnetic poles) due to a rotation operation of a fan (not shown). S is supplied to S and flows in the axial direction in the space S between the magnetic poles (see FIG. 2).

The cooling air supplied into the space S between the magnetic poles flows from the one side in the axial direction (left side in FIG. 2) toward the coil pressing member 24, and when reaching the coil pressing member 24, the coil pressing member 24. Through the radial outer space (radial outer space) S ₁ and the radial inner space (radial inner space) S ₂ (see FIG. 1) and the through hole 53 provided in the coil pressing member 24. It flows toward the other axial side of the coil pressing member 24 (right side in FIG. 2).

The cooling air supplied into the space S between the magnetic poles and flowing into the radially inner space S ₂ (or the radially outer space S ₁ ) of the coil pressing member 24 is the coil pressing member 24. Flows toward the space S _{1 on the} outer side in the radial direction of the coil pressing member 24 (or space S _{2 on the} inner side in the radial direction) (see FIG. 1).

  According to the present embodiment, by forming the through hole 53 in the coil pressing member 24, the surface area of the coil pressing member 24 exposed to the cooling air is increased, so that the cooling efficiency of the coil pressing member 24 can be improved. it can.

In addition, the cooling air flowing in the axial direction in the inter-magnetic pole space S passes through the through hole 53 as well as the radial outer space S ₁ and the radial inner space S ₂ from the one axial side of the coil pressing member 24. Since it flows to the other side in the direction, the resistance of the cooling air flowing in the axial direction in the space S between the magnetic poles can be reduced, and the circulation efficiency of the cooling air in the rotating electrical machine 1, that is, the cooling efficiency can be improved.

  Further, by forming the groove 52 in the coil pressing member 24, the coil pressing member 24 and the rotor winding 22 are exposed to the cooling air in the groove 52 (between the coil pressing member 24 and the rotor winding 22). Therefore, the cooling efficiency of the coil pressing member 24 and the rotor winding 22 can be improved.

  In the rotating electrical machine 1, the number, shape, and position of the coil pressing member 24 provided between the magnetic poles 12 a (rotor windings 22) adjacent in the circumferential direction, and the groove portion 52 provided in the coil pressing member 24 and The number, shape, and position of the through-holes 53 are appropriately set according to the number of turns of the rotating machine winding 22 (the area of the circumferential outer end surface 22a), the axial length, and the cooling air flow velocity and flow rate. Is possible.

  In the rotating electrical machine 1, the coil pressing member 24 may not be connected to the coil support member 25, but may be directly fixed to the shaft portion 21 a of the rotor core 21 by, for example, a bolt 31.

[Example 2]
The structure of the rotating electrical machine according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4.

  The rotating electrical machine according to the present embodiment is a four-pole salient-pole rotating electrical machine similar to the rotating electrical machine according to the first embodiment of the present invention, and according to the first embodiment of the present invention, except for the configuration of the coil pressing member 124. It has the same configuration as a rotating electrical machine. Therefore, the overlapping description with respect to the same structure as Example 1 in the rotary electric machine which concerns on a present Example is abbreviate | omitted suitably.

  As shown in FIG. 3, the rotating electrical machine 101 is provided with a rotor 112 having a magnetic pole 12 a composed of a protrusion 21 b, a head 23, and a rotor winding 22. Is provided with a coil pressing member 124 disposed between the magnetic poles 12a (rotor windings 22) adjacent to each other in the circumferential direction.

  As shown in FIGS. 3 and 4, a bolt hole 151 into which the bolt 31 can be inserted is located in the coil pressing member 124 at the center in the width direction (vertical direction in FIG. 4) of the coil pressing member 124. A plurality (two in this embodiment) are provided side by side in the axial direction (left-right direction in FIG. 4). The bolt 31 is inserted into the bolt hole 151, and the tip of the bolt 31 is screwed into the tap hole 61 provided in the coil support member 25, whereby the coil pressing member 124 and the coil support member 25 are connected. .

  Further, a groove 152 extending from the radially inner side to the radially outer side is formed on the outer end surface (first surface) 124 a in the width direction of the coil pressing member 124. The groove portions 152 are provided in a plurality (two in the present embodiment) along the axial direction in each width direction outer end face 124a, and rotate the cooling air (cooling medium) in a direction orthogonal to the axial direction. It functions as a flow path that can circulate in the steel plate lamination direction (direction in which the steel plates constituting the rotor winding 22 are laminated) in the child winding 22. In the rotating electrical machine 101, the coil holding member 124 and the rotor winding 22 are cooled when the cooling air flows through the groove 152.

  The coil pressing member 124 is formed with a through hole (first through hole) 153 that penetrates the coil pressing member 124 in the axial direction. A plurality of through holes 153 are provided in the width direction of the coil pressing member 124 (two in this embodiment), and function as a flow path through which cooling air (cooling medium) can flow in the axial direction. . In the rotating electrical machine 101, the coil holding member 124 is cooled by the cooling air flowing through the through holes 153.

  Here, the through hole 153 is disposed in the vicinity of the outer end surface 124 a in the width direction of the coil pressing member 124, and is formed so as to intersect with the groove 152. Specifically, the through hole 153 is formed so as to intersect with the groove 152 at the intermediate portion thereof, and the through hole 153 and the groove 152 communicate with each other. Therefore, during the operation of the rotating electrical machine 101, a part of the cooling medium flowing through the groove 152 flows into the through hole 153, or a part of the cooling medium flowing through the through hole 153 flows into the groove 152, and the groove 152 and The distribution efficiency of the cooling medium flowing through the through hole 153 is synergistically improved.

  According to the present embodiment, by providing the groove 152 and the through-hole 153 so as to cross (communicate with each other), in addition to the operational effects of the rotating electrical machine according to the first embodiment of the present invention described above, the cooling in the space S between the magnetic poles is performed. The distribution efficiency of the medium can be further improved, and the cooling efficiency of the entire rotating electrical machine 101 can be further improved.

[Example 3]
The structure of the rotating electrical machine according to the third embodiment of the present invention will be described with reference to FIGS.

  The rotating electrical machine according to the present embodiment is a salient pole type rotating electrical machine having four poles, similar to the rotating electrical machine according to the first embodiment of the present invention, except for the configuration of the coil pressing member 224. It has the same configuration as the rotating electric machine. Therefore, the overlapping description with respect to the same structure as Example 1 in the rotary electric machine which concerns on a present Example is abbreviate | omitted suitably.

  As shown in FIG. 5, the rotating electrical machine 201 is provided with a rotor 212 having a magnetic pole 12 a composed of a protrusion 21 b, a head 23, and a rotor winding 22. Is provided with a coil pressing member 224 disposed between the magnetic poles 12a (rotor windings 22) adjacent in the circumferential direction.

  As shown in FIGS. 5 and 6, the coil pressing member 224 has a bolt hole 251 through which the bolt 31 can be inserted located at the center in the width direction (vertical direction in FIG. 6) of the coil pressing member 224. A plurality (two in this embodiment) are provided side by side in the axial direction (left-right direction in FIG. 6). The bolt 31 is inserted into the bolt hole 251, and the tip of the bolt 31 is screwed into the tap hole 61 provided in the coil support member 25, whereby the coil pressing member 224 and the coil support member 25 are connected. .

  Further, a groove portion 252 extending from the radially inner side to the radially outer side is formed in the width direction outer side end surface (first surface) 224a of the coil pressing member 224. The groove part 252 is provided in the axial direction center part of each width direction outer side end surface 224a, and is a direction orthogonal to an axial direction, and is a steel plate lamination direction (the rotor winding 22) (cooling medium). It functions as a flow path that can circulate in the direction in which the steel plates constituting the rotor winding 22 are laminated. In the rotating electrical machine 201, the coil holding member 224 and the rotor winding 22 are cooled by the cooling air flowing through the groove 252.

  The coil pressing member 224 is formed with a first through hole 253 that passes through the coil pressing member 224 in the axial direction. A plurality of (two in the present embodiment) first through-holes 253 are provided side by side in the width direction of the coil pressing member 224, and a flow path capable of flowing cooling air (cooling medium) in the axial direction. Function as. In the rotary electric machine 201, the coil holding member 224 is cooled by the cooling air flowing through the first through hole 253.

  The coil pressing member 224 is formed with a second through hole 254 that passes through the coil pressing member 224 in the height direction (substantially radial direction). A plurality of (two in the present embodiment) second through holes 254 are provided side by side in the width direction of the coil pressing member 224, and the cooling air is in a direction orthogonal to the axial direction. It functions as a flow path that can circulate in the height direction (substantially radial direction) of the member 224. In the rotary electric machine 201, the coil holding member 224 is cooled by the cooling air flowing through the second through hole 254.

  Here, the second through hole 254 is formed so as to intersect with the groove portion 252 and the first through hole 253. Specifically, the second through-hole 254 intersects the first through-hole 253 at an intermediate portion thereof, and is formed so that one end thereof faces the groove portion 252 and opens. The through hole 253 and the second through hole 254 are in communication (the groove 252 and the first through hole 253 are in communication via the second through hole 254). Therefore, during operation of the rotating electrical machine 201, a part of the cooling medium flowing through the groove 252 flows into the first through hole 253 and the second through hole 254, and a part of the cooling medium flowing through the first through hole 253 is. A part of the cooling medium flowing into the groove portion 252 and the second through hole 254 or flowing through the second through hole 254 flows into the groove portion 252 and the first through hole 253, and the groove portion 252, the first through hole 254 The distribution efficiency of the cooling medium flowing through the through hole 253 and the second through hole 254 is synergistically improved.

Further, a surface (radial outer end surface, second surface) 224b facing the stator 11 in the coil pressing member 224 is formed flat (planar). Therefore, the opening (groove opening) 252a where the groove 252 faces the radially outer end face 224b (diameter outer space S ₁ ) is close to the inner peripheral surface 11a of the stator 11 (D ₂₅₂ <D ₂₅₄ ). On the other hand, the opening (through-hole opening) 254a in which the second through-hole 254 faces the radially outer end face 224b (the radially outer space S ₁ ) is separated from the inner peripheral surface 11a of the stator 11 (D ₂₅₄ > _D252 ).

That is, the groove 252 opens at a location where the gap (D ₂₅₂ ) between the coil pressing member 224 (radial outer end surface 224b) and the stator 11 (inner peripheral surface 11a) is small (having an opening 252a). On the other hand, the second through hole 254 opens at a location where the gap (D ₂₅₄ ) between the coil pressing member 224 (radially outer end surface 224b) and the stator 11 (inner peripheral surface 11a) is large. (Having an opening 254a).

  According to this embodiment, the groove 252, the first through hole 253, and the second through hole 254 are provided so as to intersect (communicate with) each other, so that the operation by the rotating electrical machine according to the first embodiment of the present invention described above is performed. In addition to the effect, it is possible to further improve the flow efficiency of the cooling medium in the space S between the magnetic poles and further improve the cooling efficiency of the entire rotating electrical machine 201.

  In addition, the second through hole 254 is opened at a location where the gap between the coil pressing member 224 (radially outer end surface 224b) and the stator 11 (inner peripheral surface 11a) is large, thereby providing the second through hole. Since the flow resistance of the cooling air flowing through the hole 254 is reduced, the flow rate of the cooling air flowing through the second through-hole 254 is increased, and the cooling air flow efficiency, that is, the cooling efficiency in the rotating electrical machine 201 can be further improved. it can.

  Of course, the rotating electrical machine according to the present invention is formed so that the second through hole 254 intersects the first through hole 253 at the intermediate portion thereof and opens at one end facing the groove portion 252 as in this embodiment. It is not limited to what you do. As a coil pressing member in the rotating electrical machine according to the present invention, for example, a groove portion, a first through hole, and a second through hole may be formed at the same location.

DESCRIPTION OF SYMBOLS 1 Rotating electric machine 11 Stator 11a Inner peripheral surface 12 Rotor 12a Magnetic pole 21 Rotor core 21a Rotor core shaft 21b Rotor core protrusion 22 Rotor winding 22a Circumferential outer side of stator winding End surface 22b Radial inner end surface 23 of rotor winding 24 Head 24 Coil pressing member 24a Width direction outer end surface (first surface) of coil pressing member
25 Coil support member 25a Width direction outer side end surface 31 of coil support member Bolt 41 Insulating plate 42 Insulating plate 51 Bolt hole 52 of coil pressing member Groove portion 53 of coil pressing member Through hole (first through hole) of coil pressing member
61 Coil supporting member tap hole 101 Rotating electric machine 112 Rotor 124 Coil pressing member 124a Width direction outer end surface (first surface) of coil pressing member
151 Bolt hole 152 of coil pressing member Groove portion 153 of coil pressing member Through hole (first through hole) of coil pressing member
201 Rotating electric machine 212 Rotor 224 Coil pressing member 224a Outer end surface in width direction of coil pressing member (first surface)
224b Radial outer end surface (second surface) of coil pressing member
251 Bolt hole 252 of coil pressing member Groove 252a of coil pressing member Opening of groove (groove opening)
253 First through hole 254 of coil pressing member Second through hole 254a of coil pressing member Opening portion of second through hole (through hole opening)

Claims (4)

A stator,
An iron core that is rotatably supported on the radially inner side of the stator and has a plurality of projecting portions that protrude radially outward, and is arranged along the circumferential direction;
A winding wound around the outer periphery of the protrusion;
A coil holding member provided between the windings;
A groove portion formed on a first surface facing the winding in the coil pressing member and extending from a radially inner side to a radially outer side;
A rotating electrical machine comprising: a first through hole penetrating the coil pressing member in the axial direction. The rotating electrical machine according to claim 1, wherein the first through hole is formed in communication with the groove portion. The rotating electrical machine according to claim 1, wherein the coil pressing member has a second through hole communicating with the groove and the first through hole. The groove has a groove opening facing a second surface facing the stator in the coil pressing member,
The second through hole has a through hole opening facing the second surface,
4. The rotating electrical machine according to claim 3, wherein a distance between the through-hole opening and the stator is longer than a distance between the groove opening and the stator.

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