JP2019193573A - Rotary electric machine and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating electric machine and a method for manufacturing the same, which can easily confirm whether or not a grommet 21 is attached to a rear frame end 15 in an assembly process of the rotating electric machine. A rear frame end (15) has a frame through hole (15e) formed therein. The grommet 21 has a main body portion 21a and a flange portion 21b. The grommet 21 is inserted into the frame through hole 15e and is provided at a peripheral edge portion of a second opening opposite to the first opening facing the stator core 13 among the pair of openings formed by the frame through hole 15e in the rear frame end 15. It is attached to the rear frame end 15 by abutting the flange portion 21b. The main body portion 21a protrudes toward the first opening side of the frame through hole 15e, and has a hooking portion 21e that is hooked on the peripheral portion of the first opening at the protruding portion. It is provided in some of them. [Selection diagram]

Description

  The present invention includes a rotor attached to a rotating shaft, a stator core provided on the outer peripheral side of the rotor, and a winding extension portion electrically connected to a stator winding wound around the stator core. The present invention relates to a rotating electrical machine provided and a manufacturing method thereof.

  As this type of rotating electrical machine, as seen in Patent Document 1 below, a motor including a cylindrical motor case, a stator core housed in the motor case, a first plate portion, and a second plate portion is known. . Specifically, the first plate portion is a member that closes one end of the motor case and rotatably supports one end side of the rotating shaft. A 2nd board part is a member which plugs up the other end of a motor case in the state which made the coil | winding extension part penetrate the through-hole formed in self. Here, foreign matter may enter the stator side through the through-hole formed in the second plate portion.

  In order to prevent intrusion of foreign matter, the rotating electrical machine described in Patent Document 1 below includes a grommet that is attached to the second plate portion by being inserted into a through hole formed in the second plate portion. The grommet has an insertion hole through which the winding extension portion is inserted, and has a flange portion at the end. Here, the step of attaching the grommet in the assembly process of the motor will be described. First, in a state where the stator core is accommodated in the motor case whose one end is closed by the first plate portion, the flange portion of the grommet is placed on the stator core side. Insert the wire extension into the insertion hole of the grommet. Thereafter, the second plate portion is attached to the other end of the motor case. Accordingly, the grommet is sandwiched between the stator winding and the second plate portion, and the grommet is attached to the second plate portion in a state where the flange portion is in contact with the stator core side of the second plate portion.

JP 2014-93880 A

  Here, when the second plate portion is attached to the other end of the motor case, the grommet is surrounded by the second plate portion and the motor case. For this reason, it is difficult to check whether the grommet is attached to the second plate portion in the assembly process of the motor.

  The main object of the present invention is to provide a rotating electrical machine and a method of manufacturing the rotating electrical machine that can easily check whether a grommet is attached in the assembly process of the rotating electrical machine.

  Hereinafter, means for solving the above-described problems and the operation and effects thereof will be described.

  The present invention includes a rotor attached to a rotating shaft, a first frame end that rotatably supports one end of the rotating shaft, a second frame end that rotatably supports the other end of the rotating shaft, A stator core provided on the outer peripheral side of the rotor in a state sandwiched between the first frame end and the second frame end, and a frame through hole formed in the second frame end and extending in the central axis direction of the rotation shaft A winding extension portion extending from a stator winding wound around the stator core, a main body portion having an insertion hole through which the winding extension portion is inserted, and the main body portion. It has a flange portion provided on the outside, is inserted into the frame through hole, and faces the stator core among a pair of openings formed by the frame through hole at the second frame end. A grommet attached to the second frame end by bringing the flange portion into contact with a peripheral edge portion of the second opening opposite to the first opening. The main body portion includes the frame through-hole. Further projecting to the first opening side of the first opening, and having a hooking portion hooked on a peripheral edge of the first opening at the protruding portion, wherein the hooking portion is provided on a part of the entire outer periphery of the main body portion. It is characterized by being.

  In the above invention, one end of the rotating shaft is rotatably supported by the first frame end, and the other end of the rotating shaft is rotatably supported by the second frame end. And the stator core is provided in the state pinched | interposed into the 1st frame end and the 2nd frame end on the outer peripheral side of the rotor attached to the rotating shaft. A frame through-hole penetrating in the direction of the central axis of the rotation shaft is formed in the second frame end. A winding extending portion extending from a stator winding wound around the stator core is inserted into the frame through hole.

  Here, there is a concern that foreign matter may enter, for example, the stator core side through a frame through hole formed in the second frame end. Therefore, in the above invention, the grommet for preventing the entry of foreign matter is attached to the second frame end in a state where the winding extending portion is inserted into the frame through hole. Specifically, the grommet has a main body portion in which an insertion hole through which the winding extension portion is inserted is formed, and a flange portion provided outside the main body portion. The grommet is attached to the second frame end by being inserted into the frame through-hole and contacting the flange portion with the peripheral edge of the second opening formed on the opposite side of the second core end from the stator core side. Yes.

  Thereby, even when the first and second frame ends and the stator core are assembled with the stator core sandwiched between the first frame end and the second frame end, is the grommet attached to the second frame end? Can be easily confirmed.

Sectional drawing of a motor. Sectional drawing of the grommet of the state which is not latched by the rear frame end. The figure which shows a part of assembly process of a motor. The figure which looked at the rear frame end from the front side. The figure which shows a part of assembly process of the motor concerning other embodiment.

  Hereinafter, an embodiment in which a rotating electrical machine according to the present invention is embodied will be described with reference to the drawings. A motor as a rotating electrical machine is used as a motor for in-vehicle electric power steering, for example. A motor is arrange | positioned, for example in the vehicle interior of a vehicle.

  As shown in FIG. 1, the motor 10 corresponds to a rotating shaft 11, a rotor 12, a stator core 13, a front frame end 14 (corresponding to “first frame end”), and a rear frame end 15 (corresponding to “second frame end”). ). The rotor 12 is fixed to the rotating shaft 11 and rotates integrally with the rotating shaft 11. In this embodiment, the rotor 12 has a permanent magnet.

  The stator core 13 has an annular shape. A rotor 12 is disposed on the inner peripheral side of the stator core 13. In the present embodiment, the stator core 13 is configured by laminating a plurality of metal plates. A stator winding 13 a is wound around the stator core 13.

  The front frame end 14 is formed of a conductive material and has a substantially disc-shaped front main body portion 14a. Further, the front frame end 14 has a substantially annular front peripheral wall portion 14 b that extends from the outer edge portion of the front main body portion 14 a in a direction intersecting the front main body portion 14 a, and whose front end portion contacts the outer edge portion of the stator core 13. Yes. The front main body portion 14a rotatably supports the front side of the rotary shaft 11 via a front bearing 16 fixed to the center through hole.

  The rear frame end 15 is formed of a conductive material, and is disposed on the opposite side of the rotor 12 from the front frame end 14 in the central axis X direction of the rotation shaft 11. The rear frame end 15 has a rear main body portion 15a. The rear main body portion 15a has a disk shape, and rotatably supports the rear side of the rotating shaft 11 via a rear bearing 17 fixed to the center through hole.

  The rear frame end 15 has an annular rear peripheral wall portion 15 b that extends toward the stator core 13 in the direction of the central axis X and has a front end portion that abuts against an outer edge portion of the stator core 13. The inner peripheral surface of the rear peripheral wall portion 15b and the stator winding 13a are separated in order to ensure electrical insulation. The outer diameter of the rear peripheral wall portion 15 b is larger than the outer diameter of the stator core 13, and the inner diameter of the rear peripheral wall portion 15 b is smaller than the outer diameter of the stator core 13. A space is formed between the stator core 13 and the rear frame end 15 by the rear peripheral wall portion 15b.

  The rear frame end 15 further has a heat sink portion 15c extending from the side opposite to the stator core 13 of the rear main body portion 15a toward the side opposite to the stator core 13 in the central axis X direction on the rotating shaft 11 side relative to the rear peripheral wall portion 15b. have. Thus, a rising portion extending along the central axis X is formed on the opposite side of the rear frame end 15 from the stator core 13. The heat sink portion 15c is provided with a control board 18 that controls energization to the stator winding 13a in a state where the plate surface is in contact with the substrate placement portion of the heat sink portion 15c. The control board 18 is disposed so as to protrude outward from the heat sink portion 15c in the direction orthogonal to the central axis X.

  In the present embodiment, the rear main body portion 15a, the rear peripheral wall portion 15b, and the heat sink portion 15c are integrally formed seamlessly by casting a metal material or the like.

  In a state where the stator core 13 is sandwiched between the front frame end 14 and the rear frame end 15, a fastener (not shown) such as a through bolt is inserted into a bolt hole formed in the front frame end 14 and the rear frame end 15. The end 14 and the rear frame end 15 are fixed by a fastener. Thereby, the stator core 13, the front frame end 14, and the rear frame end 15 are integrated. A view of the rear frame end 15 viewed from the front side is shown in FIG. 4, and a bolt hole 15d formed in the rear frame end 15 is shown in FIG.

  The control board 18 is made of a material having electrical insulation. In the present embodiment, the control board 18 is provided with an inverter for energization control of the stator winding 13a and the like in order to drive the motor 10 as an AC motor. Specifically, an electronic component 19 such as a semiconductor element for energizing the stator winding 13 a is mounted on the plate surface on the rear frame end 15 side of the pair of plate surfaces of the control board 18. The electronic component includes a heat generating component such as a power element (for example, a MOSFET) that generates electricity when energized.

  By providing the heat sink portion 15c, the rear frame end 15 also serves as a heat sink that releases heat of the heat generating components mounted on the control board 18 to the outside or temporarily accumulates heat of the heat generating components. .

  A bottomed cylindrical cover 20 surrounding the control board 18 is attached to a part of the outer peripheral surface of the rear main body 15a. In the present embodiment, the outer peripheral surface of the stator core 13 is exposed outside without being surrounded by the cover 20. Therefore, the front frame end 14, the rear frame end 15, and the cover 20 serve as a motor case that prevents water and the like from entering the motor 10.

  The control board 18 and the stator winding 13a are electrically connected by a winding extending portion 13b inserted through the frame through hole 15e of the rear frame end 15. Winding extension portion 13b is formed to extend from stator winding 13a along the central axis X direction. The number of winding extending portions 13 b is provided corresponding to the number of phases of the motor 10. In the present embodiment, two systems of three-phase motors 10 are used as the motor 10, and the number of winding extending portions 13b is six.

  The frame through hole 15e is a through hole formed in a portion of the rear main body portion 15a that faces the stator core 13. Further, the frame through hole 15e is formed closer to the rotating shaft 11 than the rear peripheral wall portion 15b. In the present embodiment, the frame through hole 15e is formed so that the frame through hole 15e is continuous with the inner peripheral surface of the rear peripheral wall portion 15b. Here, foreign matter may enter from the first space surrounded by the cover 20 and the rear frame end 15 into the second space surrounded by the stator core 13 and the rear frame end 15 via the frame through hole 15e. There is. In addition, foreign matter may enter the first space from the second space through the frame through hole 15e. For this reason, the grommet 21 is attached to the rear frame end 15 by inserting the grommet 21 into the frame through hole 15e.

  The grommet 21 is formed of a material having electrical insulation, and in the present embodiment, the grommet 21 is integrally formed of a resin (for example, synthetic resin) or rubber without a joint. In the present embodiment, although there are six winding extending portions 13b, only two frame through holes 15e are formed in the rear frame end 15 as shown in FIG. This is because the grommets 21 corresponding to the three winding extension portions 13b indicated by broken lines in the figure are integrally formed.

  The grommet 21 has a main body portion 21a and a flange portion 21b. The body portion 21a is formed with an insertion hole 22 for inserting the winding extension portion 13b. The flange portion 21b is a bowl-shaped portion provided outside the main body portion 21a. In the present embodiment, the flange portion 21b is provided in the middle of the main body portion 21a in the direction in which the insertion hole 22 extends. Moreover, in this embodiment, the flange part 21b is provided over the perimeter of the main-body part 21a.

  A plurality of (two) annular protrusions 21c are provided on one side of the main body 21a with respect to the flange 21b in the direction in which the insertion hole 22 extends. Further, in the direction in which the insertion hole 22 extends, the other side of the main body portion 21a with respect to the flange portion 21b is an extension portion 21d.

  The grommet 21 is inserted into the frame through hole 15e in a state where the protruding portion 21c is compressed, and the first opening facing the stator winding 13a among the pair of openings formed by the frame through hole 15e in the rear frame end 15 is provided. It is attached to the rear frame end 15 by bringing the flange portion 21b into contact with the peripheral edge portion of the second opening on the opposite side. That is, the flange portion 21b is in contact with the peripheral edge portion of the second opening on the end surface of the rear frame end 15 on the control board 18 side.

  The main body 21a protrudes toward the first opening side of the frame through hole 15e. Thereby, the grommet 21 is interposed between the rear frame end 15 and the winding extension part 13b continuously from the first opening to the second opening. The protruding portion on the first opening side of the main body portion 21a is provided with a hooking portion 21e that is hooked on the peripheral portion of the first opening. The hook portion 21e is provided so as not to contact the stator winding 13a when the flange portion 21b is in contact with the peripheral edge portion of the second opening.

  Here, in the present embodiment, when the hook portion 21e comes off from the peripheral portion of the first opening due to a temperature change or vibration of the motor 10, and the grommet 21 is displaced toward the control board 18 along the winding extension portion 13b. Even so, a configuration is adopted in which the grommet 21 does not come out of the frame through hole 15e. Specifically, in the central axis X direction, the distance from the portion where the flange portion 21b contacts the rear main body portion 15a to the protruding portion 21c farthest from the flange portion 21b is defined as a first distance L1. Further, in the central axis X direction, the distance from the tip of the extending portion 21d to the plate surface on the rear frame end 15 side of the control board 18 is a second distance L2. In this case, the distance from the portion where the flange portion 21b contacts the rear main body portion 15a to the tip of the extending portion 21d is set in the central axis X direction so as to satisfy the relationship of “L2 <L1”. .

  Next, the insertion hole 22 formed in the grommet 21 will be described with reference to FIG. Here, FIG. 2 is a cross-sectional view of the grommet 21 in a state where the grommet 21 is not attached to the rear frame end 15 and the winding extending portion 13b is not inserted. In FIG. 2, the winding extension 13b is indicated by a broken line.

  The insertion hole 22 at the distal end portion of the extending portion 21d is a reduced diameter portion 22a whose sectional area is smaller than the sectional area of the winding extending portion 13b. The reduced diameter portion 22a is for eliminating or reducing the gap between the winding extension portion 13b and the grommet 21 while holding the winding extension portion 13b. Further, in the insertion hole 22, the hooked portion 21 e side of the reduced diameter portion 22 a is a diameter-expanded portion 22 b that increases in diameter around the central axis X as it goes from the reduced diameter portion 22 a toward the hooked portion 21 e. Yes. The enlarged diameter portion 22b is for guiding the winding extension portion 13b inserted from the hooking portion 21e side of the grommet 21 to the reduced diameter portion 22a.

  Next, a part of the assembly process of the motor 10 according to the present embodiment will be described with reference to FIG.

  First, as shown in FIG. 3A, the assembly of the rotating shaft 11, the rotor 12, the stator core 13, and the front frame end 14 is in a state where the front side is vertically downward. Then, by moving the rear frame end 15 from above the assembly toward the assembly, the winding extending portion 13b is inserted into the frame through hole 15e.

  Subsequently, as shown in FIG. 3B, the grommet 21 is inserted into the insertion hole 22 of the grommet 21 while the winding extension part 13b is inserted through the frame through hole 15e. Is inserted into the frame through hole 15e from the second opening side of the rear frame end 15. Thereby, the grommet 21 is attached to the rear frame end 15.

  Subsequently, as shown in FIG. 3C, the control board 18 is electrically connected to the winding extension portion 13b. In this embodiment, the control board 18 is electrically connected to the winding extension portion 13b by soldering. Subsequently, as shown in FIG. 3D, the cover 20 is attached to a part of the outer peripheral surface of the rear main body portion 15a.

  The effect of this embodiment explained in full detail above is demonstrated.

  After assembling the rear frame end 15 to the stator core 13, the grommet 21 was attached to the rear frame end 15 by inserting the grommet 21 into the frame through hole 15 e from the second opening side of the rear frame end 15. For this reason, in the assembly process of the motor 10, it is possible to easily check whether the grommet 21 is attached to the rear frame end 15.

  The control board 18 was disposed at a position facing the frame through hole 15e, and a winding extension 13b extending from the stator winding 13a along the central axis X direction was electrically connected to the control board 18. In this configuration, the grommet 21 can be displaced toward the control board 18 along the winding extension portion 13b. In particular, in the present embodiment, the rear frame end 15 is provided with the heat sink portion 15c so that the rear frame end 15 functions as a heat sink, and the control board 18 is provided on the heat sink portion 15c. For this reason, the dimension of the rear frame end 15 in the direction of the central axis X increases, and the distance between the second opening of the frame through-hole 15e and the control board 18 increases. Therefore, the grommet 21 is likely to come out of the frame through hole 15e when the grommet 21 is displaced toward the control substrate 18 side. Therefore, in this embodiment, the extending portion 21d is provided in the grommet 21. Then, the distance from the portion where the flange portion 21b abuts on the rear main body portion 15a to the tip of the extending portion 21d is set in the central axis X direction so that the second distance L2 is shorter than the first distance L1. did. As a result, even when the grommet 21 is displaced toward the control board 18 along the winding extending portion 13b, it is possible to avoid the grommet 21 from coming out of the frame through hole 15e, and to prevent foreign matter from entering.

  In a state where the flange portion 21 b is in contact with the peripheral edge portion of the second opening of the rear frame end 15, the distal end portion of the extending portion 21 d is separated from the plate surface of the control board 18. Thereby, it can avoid that the function of the diameter reducing part 22a is impaired. That is, the reduced diameter portion 22 a is formed in the grommet 21 in order to eliminate the gap between the winding extension portion 13 b and the grommet 21. The reason why the reduced diameter portion 22a is formed only on the tip end side of the extending portion 21d is to reduce the load when the winding extending portion 13b is inserted into the insertion hole 22.

  Here, unlike the present embodiment, the flange portion 21b abuts on the peripheral edge portion of the second opening of the rear frame end 15 in order to avoid the grommet 21 from shifting to the control board 18 side due to temperature change or vibration. It is also conceivable to adopt a configuration in which the tip of the extension portion 21d is brought into contact with the plate surface of the control board 18 in the state. However, in this case, the distal end portion of the extending portion 21d is likely to receive a heat load from the control board 18. As the thermal load, for example, in the assembly process, a thermal load in the case where the control board 18 is soldered to the winding extension portion 13b can be considered. When a thermal load acts on the tip of the extension part 21d, the shape of the reduced diameter part 22a can change. In this case, the gap between the winding extension portion 13b and the grommet 21 becomes large, and the function that the reduced diameter portion 22a should perform may be impaired. Therefore, the tip of the extended portion 21d is prevented from coming into contact with the plate surface of the control board 18 when the flange portion 21b is in contact with the peripheral edge of the second opening of the rear frame end 15. Thereby, it can avoid that the function of the diameter reducing part 22a is impaired.

  The main body portion 21a is protruded to the first opening side of the frame through hole 15e. Thereby, the rear frame end 15 and the winding extension part 13b can be insulated accurately.

  A second space surrounded by the stator core 13 and the rear frame end 15 is formed by the rear peripheral wall portion 15 b of the rear frame end 15. In this configuration, from the viewpoint of reducing the size of the motor 10, it is desirable to form the frame through hole 15e at a position as close as possible to the rear peripheral wall portion 15b. However, in this case, it becomes impossible to secure a seating surface with which the flange portion 21b abuts at the peripheral edge portion of the first opening of the rear frame end 15. On the other hand, the seating surface of the flange portion 21b is secured on the control board 18 side of the rear main body portion 15a. For this reason, in the configuration in which the second space surrounded by the stator core 13 and the rear frame end 15 is formed by the rear peripheral wall portion 15b, there is a great merit that the grommet 21 can be inserted from the second opening side of the frame through hole 15e.

  In the state where the flange portion 21b is in contact with the peripheral edge portion of the second opening of the rear frame end 15, the hook portion 21e is prevented from contacting the stator winding 13a. The stator winding 13a generates heat when energized. For this reason, when the catching part 21e is in contact with the stator winding 13a, the shape of the catching part 21e changes or the catching part 21e deteriorates, so that the catching part 21e is hooked on the rear body part 15a. There is concern that power will decline. Therefore, by preventing the hook portion 21e from coming into contact with the stator winding 13a, it is possible to avoid a change in the shape of the hook portion 21e.

(Other embodiments)
The above embodiment may be modified as follows.

  -It can replace with the process demonstrated in previous FIG. 3, and can also employ | adopt the process shown in FIG. Specifically, as shown in FIG. 5A, the grommet 21 is attached to the rear frame end 15 by inserting the grommet 21 from the second opening side of the frame through hole 15e. Subsequently, as illustrated in FIG. 5B, the winding extension portion 13 b is inserted through the insertion hole 22 of the grommet 21 attached to the rear frame end 15. Thereafter, the steps shown in FIGS. 3C and 3D are performed.

  In the above embodiment, the extending part 21 d and the catching part 21 e are not essential for the grommet 21.

  The heat generating component is not limited to the control board 18 and may be provided in the heat sink portion 15c.

  -In the said embodiment, the grommet may be provided with respect to each of the coil | winding extension part 13b.

  In the above-described embodiment, the grommet may be inserted into the frame through-hole 15e in a state where the entire insertion portion to be inserted into the frame through-hole 15e of the grommet is compressed.

  -The method of integrating the stator core 13, the front frame end 14 and the rear frame end 15 is not limited to the method of fixing with a fastener such as a through bolt.

  The motor is not limited to a motor for electric power steering, but may be a motor for other uses such as a power window or a wiper motor.

  DESCRIPTION OF SYMBOLS 10 ... Motor, 11 ... Rotating shaft, 12 ... Rotor, 13 ... Stator core, 13a ... Stator winding, 13b ... Winding extension part, 14 ... Front frame end, 15 ... Rear frame end, 21 ... Grommet

Claims (8)

A rotor (12) attached to a rotating shaft (11);
A first frame end (14) rotatably supporting one end side of the rotating shaft;
A second frame end (15) that rotatably supports the other end of the rotating shaft;
A stator core (13) provided on the outer peripheral side of the rotor in a state sandwiched between the first frame end and the second frame end;
Winding extending portion extending from a stator winding (13a) wound around the stator core, inserted into a frame through hole (15e) formed in the second frame end and extending in the direction of the central axis of the rotating shaft. (13b)
It has a main body part (21a) formed with an insertion hole (22) through which the winding extension part is inserted, and a flange part (21b) provided outside the main body part, and is inserted into the frame through hole. The flange portion is brought into contact with the peripheral edge portion of the second opening opposite to the first opening facing the stator core among the pair of openings formed by the frame through-holes at the second frame end. And a grommet (21) attached to the second frame end,
The main body portion further protrudes toward the first opening side of the frame through-hole, and further has a hook portion (21e) hooked to the peripheral edge portion of the first opening at the protruding portion,
The rotating electric machine according to claim 1, wherein the hook portion is provided on a part of the entire outer periphery of the main body portion. Provided on the opposite side of the second frame end from the stator core side, and comprising a control board (18) for performing energization control of the stator winding,
The control board is disposed at a position facing the frame through hole,
The winding extension portion electrically connects the control board and the stator winding,
The flange portion is provided in the middle of the main body portion in the extending direction of the insertion hole,
One side of the main body portion with respect to the flange portion in the direction in which the insertion hole extends is an inserted portion to be inserted into the frame through hole, and the other side is not inserted into the frame through hole. An extension part (21d),
The distance from the portion farthest from the flange portion of the portion to be in contact with the inner peripheral surface of the frame through-hole in the inserted portion to the portion in which the flange portion contacts the peripheral edge of the second opening is 2. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is longer than a distance from a plate surface of the control board on the second frame end side to a tip of the extension portion. With heat-generating parts that generate heat when energized,
The second frame end has a heat sink portion (15c) for releasing the heat generated by the heat generating component between the contact portion with the flange portion and the control board in the central axis direction. The rotating electrical machine according to claim 2, wherein In a state where the grommet is not attached to the second frame end, the insertion hole has a smaller cross-sectional area than the cross-sectional area of the winding extension part. The diameter-reduced portion (22a), the portion that is closer to the first opening than the diameter-reduced portion is a diameter-expanded portion (22b) that is larger than the cross-sectional area of the diameter-reduced portion,
The extension part is characterized in that a tip part of the extension part is separated from a plate surface of the control board in a state in which the flange part is in contact with a peripheral part of the second opening. Or the rotary electric machine of 3. A control board (18) that is provided on the opposite side of the second frame end from the stator core side and performs energization control of the stator winding;
A cover (20) attached to a part of the outer peripheral surface of the second frame end and surrounding the control board,
The winding extension portion electrically connects the control board and the stator winding,
The stator core is provided such that an outer peripheral surface thereof is exposed to the outside without being surrounded by the cover,
The second frame end has a peripheral wall portion (15b) that extends toward the stator core and has a tip that abuts against an outer edge of the stator core.
A space that is surrounded by the stator core and the second frame end is formed by the peripheral wall portion,
5. The rotating electrical machine according to claim 1, wherein the frame through hole is formed closer to the rotating shaft than the peripheral wall portion.   2. The grommet is provided such that a tip portion of the main body portion on the stator core side does not contact the stator winding in a state where the flange portion is in contact with a peripheral edge portion of the second opening. The rotary electric machine of any one of -5. A method of manufacturing a rotating electrical machine according to any one of claims 1 to 6,
Inserting the winding extension through the frame through hole;
The grommet is inserted into the frame through hole from the second opening side while the winding extension portion is inserted into the insertion hole of the grommet in a state where the winding extension portion is inserted into the frame through hole. And a step of attaching the grommet to the second frame end. A method of manufacturing a rotating electrical machine according to any one of claims 1 to 6,
Attaching the grommet to the second frame end by inserting the grommet into the frame through-hole from the second opening side at the second frame end;
And a step of inserting the winding extension portion into the insertion hole of the grommet attached to the second frame end.

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