JP2022124161A - Stator of rotary electric machine and manufacturing method for the same - Google Patents

Abstract

To provide a stator of a rotary electric machine capable of making the adherence force of a plurality of windings to an insulator.SOLUTION: A stator of a rotary electric machine includes a plurality of teeth arranged in an annular shape and protruding inward, a plurality of insulators covering each of the plurality of teeth and having grooves on outer surfaces, a plurality of windings concentrated and wound around each of the plurality of insulators, and a plurality of first resin bodies made of a thermosetting resin, each arranged at each of the plurality of insulator grooves between the plurality of insulators and the plurality of windings.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a stator for a rotating electrical machine and a method for manufacturing a stator for a rotating electrical machine.

Patent Literature 1 discloses a stator for a rotating electric machine. The stator is fixed by being impregnated with varnish.

Japanese Patent No. 5714122

However, in the stator disclosed in Patent Literature 1, the plurality of windings are concentratedly wound around the insulator. Therefore, the varnish does not easily penetrate inside the multiple windings. As a result, the fixing force of the multiple windings may become unstable.

The present disclosure has been made to solve the above problems. SUMMARY OF THE INVENTION An object of the present invention is to provide a stator for a rotating electrical machine and a method for manufacturing the stator for a rotating electrical machine that can stabilize the fixing force of a plurality of windings to an insulator.

A stator for a rotary electric machine according to the present disclosure includes: a plurality of teeth arranged in a ring shape and protruding inward; a plurality of insulators covering the plurality of teeth and having grooves on outer surfaces thereof; a plurality of windings concentratedly wound around an insulator, and the plurality of insulations formed of a thermosetting resin between each of the plurality of insulators and each of the plurality of windings and a plurality of first resin bodies respectively arranged in the grooves of the body.

A stator for a rotary electric machine according to the present disclosure includes: a plurality of teeth arranged in a ring shape and protruding inward; a plurality of insulators covering the plurality of teeth and having grooves on outer surfaces thereof; and a plurality of windings formed of a thermosetting resin and hardened between each of the plurality of insulators and each of the plurality of windings and a first resin body.

A method of manufacturing a stator for a rotary electric machine according to the present disclosure arranges each of a plurality of first resin bodies in each of grooves on an outer surface of a plurality of insulators covering each of a plurality of teeth with a plurality of insulators. a first resin body arranging step; after the first resin body arranging step, a winding arranging step of winding a plurality of windings around the plurality of insulators; and a first resin body curing step of heating and melting the resin body and then curing the resin body.

According to the present disclosure, a first resin body is disposed for each of the plurality of insulators between the insulator and the plurality of windings. Therefore, it is possible to stabilize the fixing strength of the plurality of windings to the insulator.

2 is a front view of the stator of the rotary electric machine according to Embodiment 1; FIG. FIG. 2 is an exploded perspective view of a main part of the stator of the rotary electric machine according to Embodiment 1; 2 is a perspective view of an insulator of the stator of the rotary electric machine according to Embodiment 1. FIG. 2 is a longitudinal sectional view of a main part of the stator of the rotary electric machine according to Embodiment 1; FIG. FIG. 2 is a perspective view of a main part of the stator of the rotary electric machine according to Embodiment 1; 2 is a longitudinal sectional view of a main part of the stator of the rotary electric machine according to Embodiment 1; FIG.

Embodiments will be described with reference to the accompanying drawings. In addition, the same code|symbol is attached|subjected to the part which is the same or corresponds in each figure. Redundant description of the relevant part will be simplified or omitted as appropriate.

Embodiment 1.
1 is a front view of a stator of a rotating electric machine according to Embodiment 1. FIG.

In FIG. 1, a rotating electric machine 1 is used as an electric motor or a generator. A rotating electric machine 1 includes a rotor 2 and a stator 3 .

The rotor 2 is provided rotatably around the axis of the rotating electric machine 1 . The stator 3 is formed in an annular shape.

Next, the essential parts of the stator 3 will be described with reference to FIG.
FIG. 2 is an exploded perspective view of a main part of the stator of the rotary electric machine according to Embodiment 1. FIG.

As shown in FIG. 2 , the stator 3 includes a plurality of teeth 4 , a plurality of insulators 5 , a plurality of windings 6 and a plurality of connection bodies 7 .

Although details are not shown in FIG. 2, the plurality of teeth 4 are arranged in a ring. A plurality of teeth 4 protrude toward the inside of rotary electric machine 1 . Each of the plurality of teeth 4 is formed by laminating a plurality of core materials 4a.

The plurality of insulators 5 are made of thermoplastic resin. A plurality of insulators 5 cover the plurality of teeth 4 respectively.

Although details are not shown in FIG. 2 , the plurality of windings 6 are wound around the plurality of insulators 5 intensively.

A plurality of connection bodies 7 connect respective ends of the plurality of windings 6 and respective ends of wires from the outside.

Next, the insulator 5 will be described with reference to FIG.
3 is a perspective view of an insulator of the stator of the rotary electric machine according to Embodiment 1. FIG.

As shown in FIG. 3, the insulator 5 is made of thermoplastic resin. A main part of the insulator 5 is formed in a rectangular tubular shape. The insulator 5 has a plurality of grooves 5a. The plurality of grooves 5 a are arranged vertically on both outer side surfaces of the insulator 5 . Although details are not shown in FIG. 3 , the longitudinal direction of the plurality of grooves 5 a is perpendicular to the longitudinal direction of the plurality of windings 6 .

Next, a method of fixing the plurality of windings 6 and the connection body 7 will be described with reference to FIGS. 4 and 5. FIG.
FIG. 4 is a vertical cross-sectional view of a main part of the stator of the rotary electric machine according to Embodiment 1. FIG. 5 is a perspective view of a main part of the stator of the rotary electric machine according to Embodiment 1. FIG. 4 and 5, the vertical direction is the direction along the axis of the rotating electric machine 1. As shown in FIG. Also, in FIG. 5, the plurality of windings 6 and the connection body 7 are not shown.

In FIG. 4 , in the step of arranging the first resin bodies, the worker arranges each of the plurality of first resin bodies 8 in each of the grooves 5 a on the outer surface of the plurality of insulators 5 . At this time, the worker arranges each of the plurality of first resin bodies 8 so as not to protrude outward from each of the grooves 5 a on the outer peripheral surfaces of the plurality of insulators 5 . After that, in the winding arrangement process, the worker winds a plurality of windings 6 around a plurality of insulators 5 .

Thereafter, in the second resin body arranging step, the worker arranges the plurality of second resin bodies 9 above the plurality of windings 6 for each of the plurality of insulators 5 . After that, in the step of arranging the wire connection bodies 7 , the worker arranges the wire connection bodies 7 above any one of the plurality of second resin bodies 9 . After that, in the third resin body placement step, the worker places the third resin body 10 above the connection body 7 .

Thereafter, in the resin body curing step, the worker simultaneously heats the plurality of first resin bodies 8, the plurality of second resin bodies 9, and the third resin body 10 to melt and then cure them.

Next, the state of the stator 3 after heat treatment will be described with reference to FIG.
FIG. 6 is a vertical cross-sectional view of a main part of the stator of the rotary electric machine according to Embodiment 1. FIG. 6, the vertical direction is the direction along the axis of the rotary electric machine 1. As shown in FIG.

As shown in FIG. 6 , each of the first resin bodies 8 is arranged between each of the plurality of insulators 5 and each of the plurality of windings 6 from each side of the plurality of insulators 5 . It hardens after flowing to the bottom. Each of the plurality of second resin bodies 9 is cured above the plurality of windings 6 for each of the plurality of insulators 5 . The third resin body 10 is cured so as to surround the wire connection body 7 .

According to the first embodiment described above, the first resin body 8 is arranged between each of the plurality of insulators 5 and the plurality of windings 6 . For this reason, after the heat treatment, the first resin body 8 hardens on the side and bottom of each of the plurality of insulators 5 between each of the plurality of insulators 5 and each of the plurality of windings 6 . do. As a result, the fixing force of the plurality of windings 6 to the insulator 5 can be stabilized without impregnating the stator 3 with varnish.

Further, the longitudinal direction of the plurality of grooves 5a is orthogonal to the longitudinal direction of the plurality of windings 6. As shown in FIG. Therefore, during the heat treatment, the first resin body 8 flows to the lower portion of the insulator 5 after flowing over the entire outer surface of the insulator 5 . Therefore, the fixing force of the plurality of windings 6 to the insulator 5 can be further stabilized.

Further, the second resin body 9 is cured on each of the plurality of insulators 5 above the plurality of windings 6 . Therefore, the fixation force of the plurality of windings 6 can be stabilized on the insulator 5 without impregnating the stator 3 with varnish.

Also, the third resin body 10 hardens on the outer periphery of the wire connection body 7 . Therefore, it is possible to stabilize the fixing force of the wire connection body 7 without impregnating the stator 3 with varnish.

It should be noted that the first resin body 8, the second resin body 9, and the third resin body 10 may be thermosetting resins that are melted by heating and then hardened. For example, the first resin body 8, the second resin body 9 and the third resin body 10 may be varnish included in the sheet. In this case, the first resin body 8 can be easily fitted into the groove 5a by shaping the first resin body 8 to match the groove 5a. By making the area of the second resin body 9 equal to the area of the upper surface of the insulator 5 , the fixing force of the plurality of windings 6 on the upper portion of the insulator 5 can be made more stable. By wrapping the wire connection body 7 with the third resin body 10, the fixing force of the wire connection body 7 can be stabilized.

Further, the resin body curing process may be divided into a first resin body curing process, a second resin body curing process, and a third resin body curing process. In this case, the first resin body 8 may be melted by heating in the first resin body curing process immediately after the winding arrangement process, and then cured. Immediately after the second resin body placing process, in the second resin body curing process, the second resin body 9 may be heated and melted and then cured. Immediately after the third resin body placement step, in the third resin body curing step, the third resin body 10 may be melted by heating and then cured.

REFERENCE SIGNS LIST 1 rotary electric machine 2 rotor 3 stator 4 teeth 4a core material 5 insulator 5a groove 6 winding 7 connection body 8 first resin body 9 second resin body 10 third resin body

Claims (15)

a plurality of teeth arranged in an annular shape and projecting inward;
a plurality of insulators each covering the plurality of teeth and having a groove on the outer surface;
a plurality of windings that are concentratedly wound around the plurality of insulators;
a plurality of first resin bodies made of a thermosetting resin and arranged in grooves of the plurality of insulators between each of the plurality of insulators and each of the plurality of windings;
A stator for a rotating electric machine. 2. The stator for a rotary electric machine according to claim 1, wherein said grooves are formed such that the longitudinal direction thereof is orthogonal to the longitudinal direction of said plurality of windings. a second resin body formed of a thermosetting resin and arranged above the plurality of windings for each of the plurality of insulators;
The stator for a rotary electric machine according to claim 1 or 2, comprising: a third resin body made of a thermosetting resin and arranged above the connection body;
The stator for a rotary electric machine according to any one of claims 1 to 3, comprising: a plurality of teeth arranged in an annular shape and projecting inward;
a plurality of insulators each covering the plurality of teeth and having a groove on the outer surface;
a plurality of windings that are concentratedly wound around the plurality of insulators;
a plurality of first resin bodies formed of a thermosetting resin and cured between each of the plurality of insulators and each of the plurality of windings;
A stator for a rotating electric machine. 6. The stator for a rotary electric machine according to claim 5, wherein said grooves are formed such that the longitudinal direction thereof is orthogonal to the longitudinal direction of said plurality of windings. 6. The plurality of first resin bodies are hardened after each of the plurality of first resin bodies flows to the bottom of each of the plurality of insulators between each of the plurality of windings. Item 7. A stator for a rotary electric machine according to Item 6. a second resin body formed of a thermosetting resin and cured on top of the plurality of windings for each of the plurality of insulators;
The stator for a rotary electric machine according to any one of claims 5 to 7, comprising: a third resin body formed of a thermosetting resin and hardened on the outer periphery of the wire connection body;
The stator for a rotary electric machine according to any one of claims 5 to 8, comprising: a first resin body arranging step of arranging each of the plurality of first resin bodies in each of the grooves on the outer surface of the plurality of insulators covering each of the plurality of teeth with the plurality of insulators;
a winding arranging step of winding a plurality of windings around the plurality of insulators after the first resin body arranging step;
a first resin body curing step of heating and melting the plurality of first resin bodies after the winding arrangement step and then curing the first resin bodies;
A method for manufacturing a stator for a rotary electric machine. 11. The rotation according to claim 10, wherein the step of arranging the first resin bodies includes a step of arranging the plurality of first resin bodies so as not to protrude outward from the respective grooves of the outer peripheral surfaces of the plurality of insulators. A method for manufacturing a stator for an electric machine. In the first resin body curing step, the plurality of first resin bodies are heated and melted to form a lower portion of each of the plurality of insulators between each of the plurality of insulators and each of the plurality of windings. 12. The method of manufacturing a stator for a rotary electric machine according to claim 10, further comprising the step of curing said plurality of first resin bodies after flowing to. a second resin body arranging step of arranging a plurality of second resin bodies above the plurality of windings for each of the plurality of insulators after the winding arranging step;
a second resin body curing step of heating and melting the plurality of second resin bodies after the second resin body disposing step, and then curing the second resin bodies;
13. The method of manufacturing a stator for a rotary electric machine according to any one of claims 10 to 12, comprising: a third resin body arranging step of arranging the third resin body above the connection body;
a third resin body curing step of heating and melting the third resin body after the third resin body disposing step, and then curing the third resin body;
14. The method of manufacturing a stator for a rotary electric machine according to claim 13, comprising: 15. The method of manufacturing a stator for a rotary electric machine according to claim 14, wherein said first resin body curing step, said second resin body curing step and said third resin body curing step are performed simultaneously.

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