JP2011125072A - Armature for rotary electric machines and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armature for rotary electric machines, which improves the efficiency of a rotary electric machine having a distributed winding structure of drive coil and enables cost reduction. <P>SOLUTION: The armature includes yokes 24 which are arrayed and coupled in its circumferential direction, and a plurality of magnetic pole teeth 21 which have teeth 25 projecting in its radial direction. Each tooth 25 has a tooth base 27 which projects from each yoke 24, a tooth tip 28 which projects radially more than the tip of the end of the tooth base 27, in a specified position that is separated by a specified distance to one side in its circumferential direction from the tooth base 27, and a tooth junction 29 which couples the tooth tip 28 with the tooth base 27. Slots 26 are created by the fellow adjacent tooth tips 28 of magnetic pole teeth 21 adjoining each other on one side in the circumferential direction and the fellow adjacent tooth bases 27 adjoining each other on the other in the circumferential direction. The drive coil 22 is mounted in the slots 26 to surround the tooth base 27 and the tooth tip 28. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a high-performance and low-cost armature of a rotary electric machine and a method for manufacturing the same.

  A conventional armature of a rotating electric machine has a plurality of armature core pieces arranged in a strip shape, and a drive coil is inserted into a slot portion formed between adjacent armature core pieces at a constant pitch. After the piece is deformed into a cylindrical shape and the armature core is formed into a cylindrical shape, a drive coil straddling both ends of the belt-like armature core piece is inserted into the slot portion to form a distributed winding drive coil (for example, Patent Document 1).

Japanese Patent Laying-Open No. 2009-131014 (pages 4-5, FIG. 4)

  In the armature of a rotating electrical machine having a distributed winding drive coil as in Patent Document 1, a drive coil is formed by winding a conductor around the armature core piece even if a plurality of armature core pieces are arranged in a strip shape. When inserting a molded drive coil, there is a problem that the slot between adjacent armature core pieces is narrow and the drive coil cannot be placed in the slot portion with high density, or the drive coil is difficult to insert. is there. As a result, the efficiency of the armature is deteriorated and the cost is increased.

  In addition, it is necessary to insert a drive coil straddling both ends of the belt-shaped armature core piece after the armature core is formed into a cylindrical shape, which increases the number of work steps and increases the cost.

  The present invention has been made to solve the above-described problems, and improves the efficiency of a rotating electrical machine having a distributed winding drive coil and enables the cost reduction of the rotating electrical machine. It aims to provide a method.

An armature for a rotating electrical machine according to the present invention is an electrical machine for a rotating electrical machine including a plurality of magnetic pole teeth having yoke portions arranged in a circumferential direction and connected to form a cylinder and teeth portions protruding in a radial direction. In the child
Each tooth portion of the magnetic teeth includes a tooth root portion protruding from the yoke portion, and a tip of an end portion of the tooth root portion at a predetermined position away from the teeth root portion by a predetermined distance in the circumferential direction. A tooth tip protruding further in the radial direction than the portion, and a connecting portion for connecting the tooth tip and the tooth root, and connecting the yoke portions of the plurality of magnetic teeth, A slot portion in which a drive coil is mounted is formed by the teeth tip portions of the magnetic teeth adjacent to each other in the circumferential direction and the teeth root portions of the magnetic teeth adjacent in the other circumferential direction,
The drive coil is attached to the slot portion so as to surround the tooth root portion and the tooth tip portion of each of the magnetic teeth.

A method for manufacturing an armature for a rotating electrical machine according to the present invention is a method for manufacturing an armature for a rotating electrical machine according to the present invention,
Attach the drive coil to each individual magnetic pole tooth,
After arranging the magnetic teeth with the drive coil in a cylindrical shape on a large diameter,
The said diameter is made small and the said yoke parts are connected.

Moreover, it is a manufacturing method of the armature of the rotating electrical machine according to the present invention,
A belt-like body is provided by providing a bent portion that connects the yoke portions so as to be bendable at both ends of the yoke portion.
After mounting the drive coil on each of the magnetic pole teeth by bending a part of the belt-like body so as to secure a space for mounting the drive coil on only one of the magnetic pole teeth,
The belt-like body is closed in a cylindrical shape.

According to the armature of the rotating electrical machine according to the present invention, the rotating electrical machine including a plurality of magnetic pole teeth having yoke portions arranged in a circumferential direction and connected to form a cylinder, and tooth portions projecting in the radial direction. In the armature of
Each tooth portion of the magnetic teeth includes a tooth root portion protruding from the yoke portion, and a tip of an end portion of the tooth root portion at a predetermined position away from the teeth root portion by a predetermined distance in the circumferential direction. A tooth tip protruding further in the radial direction than the portion, and a connecting portion for connecting the tooth tip and the tooth root, and connecting the yoke portions of the plurality of magnetic teeth, A slot portion in which a drive coil is mounted is formed by the teeth tip portions of the magnetic teeth adjacent to each other in the circumferential direction and the teeth root portions of the magnetic teeth adjacent in the other circumferential direction,
Since the drive coil is mounted on the slot portion so as to surround the teeth root portion and the tooth tip portion of each of the magnetic teeth, when the winding is wound to form the drive coil Sufficient space that is not obstructed by the adjacent magnetic pole teeth can be obtained, and the drive coil can be placed in the slot portion with high density and easily, so that the armature can be manufactured with high efficiency and at low cost. Also in the case of insertion, since a high-density drive coil can be easily inserted, an armature can be manufactured with high efficiency and low cost.

A method for manufacturing an armature for a rotating electrical machine according to the present invention is a method for manufacturing an armature for a rotating electrical machine according to the present invention,
Attach the drive coil to each individual magnetic pole tooth,
After arranging the magnetic teeth with the drive coil in a cylindrical shape on a large diameter,
Since the above-mentioned yoke portions are connected to each other by reducing the diameter, all the drive coils can be accommodated in the slot portions before the magnetic pole teeth are arranged in a cylindrical shape, thereby reducing the work man-hours. Therefore, the cost can be reduced.

Moreover, it is a manufacturing method of the armature of the rotating electrical machine according to the present invention,
A belt-like body is provided by providing bent portions that connect the yoke portions in a circumferential manner at both ends in the circumferential direction of the yoke portion,
After mounting the drive coil on each of the magnetic pole teeth by bending a part of the belt-like body so as to secure a space for mounting the drive coil on only one of the magnetic pole teeth,
Since the belt-like body is closed in a cylindrical shape, all the drive coils can be accommodated in the slot portion, and the number of work steps can be reduced, so that the cost can be reduced.

It is sectional drawing (B) which follows II of the top view (A) and top view (A) which show Embodiment 1 of the rotary electric machine which concerns on this invention. It is a perspective view which shows the magnetic pole teeth in the rotary electric machine which concerns on this invention. It is a perspective view for demonstrating the method of winding a drive coil to the magnetic pole tooth shown in FIG. It is a top view explaining the process of assembling the magnetic pole teeth which wound the drive coil. 6 is a partial plan view showing another example of an armature according to Embodiment 1. FIG. It is a top view which shows the magnetic pole tooth of FIG. FIG. 6 is a cross-sectional view showing a magnetic tooth according to a second embodiment. FIG. 6 is a perspective view showing a magnetic tooth according to a second embodiment. FIG. 6 is a cross-sectional view showing an armature according to a third embodiment. 10 is a plan view for explaining a method of winding a drive coil around magnetic pole teeth according to Embodiment 3. FIG. FIG. 10 is a partial plan view showing an armature according to a third embodiment.

Embodiment 1 FIG.
1 is a plan view (A) showing a first embodiment of a rotating electrical machine according to the present invention, a cross-sectional view (B) along II of the plan view (A), and FIG. 2 is a rotating electrical machine according to the present invention. FIG. 3 is a perspective view for explaining a method of winding a drive coil around the magnetic pole teeth shown in FIG. 2, and FIG. 4 is a process for assembling the magnetic pole teeth wound with the drive coil. FIG.

  As shown in FIG. 1, the rotating electrical machine 1 includes a cylindrical armature 2 and a cylindrical rotor 3 disposed on the inner periphery of the armature 2 via a predetermined gap.

The rotor shaft 4 of the rotor 3 is rotatably supported by a bearing (not shown).
The armature 2 covers a plurality of magnetic teeth 21 arranged in the circumferential direction, a drive coil 22 formed by winding a winding around each magnetic teeth 21, and a plurality of magnetic teeth 21 to cover the magnetic teeth 21. And a ring-shaped frame 23 for connecting and fixing the frames.

Each of the magnetic teeth 21 has a yoke portion 24 arranged in a circumferential direction and connected to form a cylinder, and a tooth portion 25 projecting in the radial direction, and a slot portion 26 between the adjacent tooth portions 25. Is formed.
The drive coil 22 is housed in a pair of slot portions 26 having a gap of a predetermined dimension (a position skipped in one slot in FIG. 1), and has a distributed winding structure wound at a so-called constant coil pitch.

As shown in FIG. 2, the tooth portion 25 of the magnetic teeth 21 includes a teeth root portion 27 protruding in a radial direction from the yoke portion 24 and a predetermined distance (circumferential distance) from the teeth root portion 27 in one of the circumferential directions. ) And a teeth tip portion 28 that protrudes further in the radial direction from the end portion of the tooth root portion 27 and a teeth connecting portion 29 that connects the tooth tip portion 28 and the tooth root portion 27. A slot portion 26 is formed between teeth tip portions 28 adjacent to each other in the circumferential direction and teeth root portions 27 adjacent to each other in the circumferential direction (see FIG. 4). The drive coil 22 is attached to the slot portion 26 so as to surround the tooth root portion 27 and the tooth tip portion 28 of each of the magnetic teeth 21. Further, the magnetic teeth 21 are formed by laminating a plurality of divided cores formed with a yoke portion 24 made of a plate material such as an electromagnetic steel plate, a tooth root portion 27, and a tooth tip portion 28, and teeth are connected to both ends in the laminating direction. A split core having a portion 29 is arranged. Thus, by providing the teeth connecting portions 29 at both ends in the stacking direction and not providing the teeth connecting portions 29 inside both ends in the stacking direction, magnetic flux leakage can be reduced, and the highly efficient armature 2 is provided. Can be manufactured.
FIG. 2 shows a structure in which the teeth connecting portions 29 are provided only at one end on both sides in the stacking direction. May be provided.

  As shown in FIG. 3, the magnetic pole teeth 21 (insulators attached to both ends of the coil ends of the tooth root portion 27 and the tooth tip portion 28 are omitted) are rotated in the direction indicated by the white arrows, and the magnetic poles are rotated by the nozzle 5. By winding the conductor 22a so as to surround the tooth root portion 27 and the tooth tip portion 28 of the tooth 21, the high-density drive coil 22 can be easily mounted.

A method for assembling the magnetic pole teeth 21 to which the drive coil 22 is attached will be described.
First, as shown in FIG. 4A, the all-pole teeth 21 equipped with the drive coil 22 (depicted in a simplified manner) are formed in a cylindrical shape arranged on a diameter larger than the final finished diameter, and the arranged diameter As shown in FIG. 4 (B), the yoke portions 24 of adjacent magnetic pole teeth 21 come into contact with each other and are aligned on the finished diameter. By shifting up to this point, a structure is obtained in which the magnetic pole teeth 21 are arranged in a cylindrical shape and connected as shown in FIG. Next, after the in-phase drive coil 22 is connected, the frame 23 is shrink-fitted to connect the magnetic teeth 21 to each other and fixed in the frame 23 to finish the armature 2 shown in FIG.

  According to the first embodiment, since the drive coil 22 can be easily wound around the magnetic pole teeth 21 with high density using an automatic machine or the like that rotates the magnetic pole teeth 21, a highly efficient armature. 2 can be manufactured at low cost with good productivity.

  Further, before the magnetic pole teeth are arranged in a cylindrical shape, all the drive coils can be accommodated in the slot portion, and the number of work steps can be reduced, so that the cost can be reduced.

  In FIG. 4, the example in which the pitch of the drive coil 22 is 1 slot has been described. However, the pitch of the drive coil 22 is not limited to this, and for example, as shown in FIG. In this case, as shown in FIG. 6, the teeth tip portion 28 located 2 slots away from the teeth root portion 27 is connected by the teeth connecting portion 29. By using the magnetic pole teeth 21, the same effect can be obtained.

  Further, the method of directly winding the drive coil 22 around the magnetic teeth 21 by an automatic machine has been described as an example. However, the drive coil 22 is wound around a reel having a desired shape in advance, and the formed drive coil 22 is The magnetic pole teeth 21 may be set. Also in this case, the drive coils 22 can be easily mounted at a high density because they can be inserted into the magnetic pole teeth 21 separated individually.

  Further, the connection between the magnetic teeth 21 has been described by taking the shrinkage of the frame 23 as an example. However, the connection is not limited to this. For example, the magnetic teeth 21 may be connected by covering the magnetic teeth 21 with a mold resin. .

Embodiment 2. FIG.
FIG. 7 is a cross-sectional view showing the configuration of the magnetic pole teeth of the second embodiment, and FIG. 8 is a perspective view showing the configuration of the magnetic pole teeth of the second embodiment.
In the first embodiment, the example in which the teeth connecting portions 29 are provided on the plate materials arranged at both ends in the stacking direction of the plate materials has been described. However, in the second embodiment, as shown in FIGS. The teeth root portion 27 and the teeth tip portion 28 are connected to each other by providing connecting portions 61 to the insulators 6 attached to both ends (both ends in the axial direction) of the tooth root portion 27 and the tooth tip portion 28 on the coil end side. There are the same effects as those of the first embodiment.

  Here, the insulator 6 is, for example, a resin molded product, and electrically insulates between the drive coil 22 and the magnetic pole teeth 21 and also has a winding wall 62 for positioning the drive coil 22 while preventing the coil from collapsing. I have. Then, as shown in FIG. 8, the portion covering the tooth root portion 27 and the portion covering the tooth tip portion 28 are connected by the connecting portion 61, separated from the teeth root portion 27 by a predetermined distance, and placed at a predetermined position. The arranged tooth tip portion 28 is connected to the tooth root portion 27 by a connecting portion 61.

  The drive coil 22 is wound around the insulator 6 configured as described above along the winding wall 62, and the wound magnetic pole teeth 21 are magnetic poles as shown in FIG. The armature 2 in which the teeth 21 are arranged in the circumferential direction and the magnetic pole teeth 21 are connected to each other can be manufactured.

  According to the second embodiment, as in the first embodiment, the drive coil 22 can be easily wound around the individual magnetic pole teeth 21 with high density, so that the highly efficient armature 2 can be produced with high productivity. Can be manufactured at low cost.

  In addition, since the insulator 6 is made of a nonmagnetic member, the teeth root portion 27 and the tooth tip portion 28 can be connected by the nonmagnetic connecting portion 61, thereby preventing leakage of magnetic flux and further improving efficiency. A good armature 2 can be manufactured.

  Although the example in which the pitch of the drive coil 22 is one slot is described, the coil pitch of the drive coil 22 is not limited to this, and the length of the connecting portion 61 of the insulator 6 is the same as in the first embodiment. By changing the length, the coil pitch of the drive coil 22 such as two slots can be arbitrarily selected.

Embodiment 3 FIG.
10 and 11 are plan views showing the configuration of the magnetic teeth of the third embodiment.
The magnetic pole teeth 21 of the first and second embodiments are configured to be separated into one magnetic pole tooth 21. The magnetic pole teeth 21 constituting the armature 2 in the third embodiment are shown in FIG. Thus, the bending part 7 is provided in the circumferential direction both ends of the yoke part 24, and the some magnetic teeth 21 are connected with the bending part 7 so that bending is possible. Other parts are the same as those in the first embodiment.

  As shown in FIG. 10, by bending at the bending portion 7, it is possible to secure a sufficient space for winding the winding away from the magnetic teeth 21 to which the drive coil 22 is attached and away from the adjacent magnetic teeth 21. In this state, the drive coil 22 is pulled out from the nozzle 5, and the drive coil 22 is formed by rotating the nozzle 5 in the direction indicated by the arrow IV along the tooth root portion 27 and the tooth tip portion 28 of each magnetic tooth 21. . In this way, the drive coil 22 is formed on the all magnetic pole teeth 21, and as shown in FIG. 11, the bent portion 7 is bent and the magnetic pole teeth 21 are brought closer to each other, thereby connecting the all magnetic pole teeth 21 to form a cylindrical shape. The armature 2 shown in FIG. 1 can be manufactured by fixing the magnetic pole teeth 21 in the frame 23 by shrinkage or the like.

  According to the third embodiment, by continuously winding the in-phase drive coil 22, it is possible to reduce the number of wiring man-hours after winding, and the armature 2 can be manufactured at low cost.

  The method of directly winding the drive coil 22 around the magnetic pole teeth 21 by the nozzle 5 has been described as an example. However, the drive coil 22 is wound around a reel having a desired shape and the formed drive coil 22 is wound around the magnetic pole teeth 21. As shown in FIG. 10, since it can be inserted without other magnetic teeth 21 around it, the high-density drive coil 22 is easily inserted into the magnetic teeth 21 with high productivity. be able to.

  Further, instead of the teeth connecting portion 29, the insulator 6 may be provided in the same manner as in the second embodiment, and the tooth root portion 27 and the tooth tip end portion 28 may be connected by the connecting portion 61 of the insulator 6. It becomes possible to connect by the magnetic connection part 61, the leakage of magnetic flux can be prevented, and the more efficient armature 2 can be manufactured.

  The armature of a rotating electrical machine according to the present invention can be effectively used for a rotating electrical machine for vehicles such as automobiles.

1 rotary electric machine, 2 armature, 3 rotor, 4 rotor shaft, 5 nozzle,
6 insulators, 7 bent parts, 21 magnetic teeth, 22 drive coils,
22a Conductor, 23 frame, 24 yoke part, 25 tooth part, 26 slot part,
27 Teeth root part, 28 Teeth tip part, 29 Teeth connecting part, 61 connecting part,
62 Rolled wall.

Claims (6)

In an armature of a rotating electrical machine including a plurality of magnetic teeth having a yoke portion arranged in a circumferential direction and connected to form a cylinder, and a tooth portion protruding in a radial direction,
Each tooth portion of the magnetic teeth includes a tooth root portion protruding from the yoke portion, and a tip of an end portion of the tooth root portion at a predetermined position away from the teeth root portion by a predetermined distance in the circumferential direction. A tooth tip protruding further in the radial direction than the portion, and a connecting portion for connecting the tooth tip and the tooth root, and connecting the yoke portions of the plurality of magnetic teeth, A slot portion in which a drive coil is mounted is formed by the teeth tip portions of the magnetic teeth adjacent to each other in the circumferential direction and the teeth root portions of the magnetic teeth adjacent in the other circumferential direction,
The armature for a rotating electrical machine, wherein the drive coil is attached to the slot portion so as to surround the tooth root portion and the tooth tip portion of each of the magnetic teeth. The magnetic pole teeth are formed by laminating a split core made of a plate material and formed with the yoke portion, the tooth root portion and the tooth tip portion, and the connecting portion is provided in a part of the split core. The armature for a rotating electrical machine according to claim 1, wherein the armature is a rotating electrical machine. Insulators that electrically insulate between the drive coil and the magnetic teeth are provided on both ends of the teeth of the magnetic teeth and on the coil end side of the tips of the teeth, and the connecting portions are connected to the teeth base and the teeth. The armature for a rotating electrical machine according to claim 1, wherein the armature is constituted by an insulator attached to the tip of the tooth. A method for manufacturing an armature for a rotating electrical machine according to any one of claims 1 to 3,
Attach the drive coil to each individual magnetic pole tooth,
After arranging the magnetic teeth with the drive coil in a cylindrical shape on a large diameter,
A method for manufacturing an armature for a rotating electrical machine, wherein the diameter is reduced and the yoke portions are connected to each other. A method for manufacturing an armature for a rotating electrical machine according to any one of claims 1 to 3,
A belt-like body is provided by providing bent portions that connect the yoke portions in a circumferential manner at both ends in the circumferential direction of the yoke portion,
After mounting the drive coil on each of the magnetic pole teeth by bending a part of the belt-like body so as to secure a space for mounting the drive coil on only one of the magnetic pole teeth,
A method of manufacturing an armature for a rotating electrical machine, wherein the belt-like body is closed in a cylindrical shape. 6. The method for manufacturing an armature for a rotating electrical machine according to claim 5, wherein the drive coils having the same phase are wound continuously.

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