Rotating electric machine stator and method of manufacturing the same

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

[Technical field]

[0001] The present disclosure relates to a stator for a rotating electric machine and a method for manufacturing a stator for a rotating electric machine. [Background technology]

[0002] Patent Document 1 discloses a stator for a rotating electrical machine, which is fixed by impregnating it with varnish. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5714122 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the stator described in Patent Document 1, the windings are wound around the insulator in a concentrated manner, which makes it difficult for the varnish to penetrate into the inside of the windings, which can result in unstable adhesion of the windings.

[0005] The present disclosure has been made to solve the above-mentioned problems, and an object of the present invention is to provide a stator for a rotating electric machine, which is capable of stabilizing the fixing force of a plurality of windings to an insulator, and a method for manufacturing the stator for a rotating electric machine. [Means for solving the problem]

[0006] The stator of a rotating electric machine according to the present disclosure includes a plurality of teeth arranged in an annular shape and protruding inward, and a plurality of stators each covering the plurality of teeth, The rectangular tube has a outside Both sides a plurality of insulators each having a groove on a surface thereof, a plurality of windings wound in a concentrated manner around the plurality of insulators, and a plurality of first resin bodies formed of a thermosetting resin and disposed in the grooves of the plurality of insulators between each of the plurality of insulators and each of the plurality of windings; a plurality of second resin bodies formed of a thermosetting resin and disposed on the upper portion of each of the plurality of insulators and above the plurality of windings; and a third resin body formed of a thermosetting resin and disposed above a connecting body disposed on the upper portion of any of the plurality of second resin bodies. Equipped with:

[0007] The stator of a rotating electric machine according to the present disclosure includes a plurality of teeth arranged in an annular shape and protruding inward, and a plurality of stators each covering the plurality of teeth, The rectangular tube has a outside Both sides a plurality of insulators each having a groove on a surface thereof, a plurality of windings wound around the plurality of insulators in a concentrated manner, and a plurality of first resin bodies formed of a thermosetting resin and hardened between each of the plurality of insulators and each of the plurality of windings; a plurality of second resin bodies formed of a thermosetting resin and cured on the upper part of each of the plurality of insulators and on the upper part of the plurality of windings; and a third resin body formed of a thermosetting resin and cured on an outer periphery of a wiring body arranged on any one of the plurality of second resin bodies; Equipped with:

[0008] The method for manufacturing a stator for a rotating electric machine according to the present disclosure includes: Square tube outside Both sides a first resin body arrangement step of arranging a plurality of first resin bodies in each of the grooves on the surface; a winding arrangement step of winding a plurality of windings around the plurality of insulators after the first resin body arrangement step; and a first resin body hardening step of heating the plurality of first resin bodies to melt them and then harden them after the winding arrangement step. a second resin body arrangement step of arranging a plurality of second resin bodies respectively on the upper part of each of the plurality of insulators and above the plurality of windings after the winding arrangement step; a second resin body hardening step of heating the plurality of second resin bodies to melt and then harden them after the second resin body arrangement step; a third resin body arrangement step of arranging a third resin body above a connecting body arranged on any of the plurality of second resin bodies; and a third resin body hardening step of heating the third resin body to melt and then harden them after the third resin body arrangement step. Equipped with: Effect of the Invention

[0009] According to the present disclosure, the first resin body is disposed between each of the plurality of insulators and the plurality of windings, thereby stabilizing the adhesive strength of the plurality of windings to the insulators. [Brief description of the drawings]

[0010] [Figure 1] 2 is a front view of the stator of the rotating electric machine according to the first embodiment. FIG. [Diagram 2] 2 is an exploded perspective view of a main part of a stator of a rotating electric machine according to the first embodiment. FIG. [Diagram 3] 2 is a perspective view of an insulator of a stator of a rotating electric machine according to the first embodiment. FIG. [Figure 4] 2 is a vertical cross-sectional view of a main portion of a stator of a rotating electric machine according to the first embodiment. FIG. [Diagram 5] 1 is a perspective view of a main portion of a stator of a rotating electric machine according to a first embodiment. [Figure 6] 2 is a vertical cross-sectional view of a main portion of a stator of a rotating electric machine according to the first embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The embodiments will be described with reference to the accompanying drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. Duplicate descriptions of the parts will be appropriately simplified or omitted.

[0012] Embodiment 1 FIG. 1 is a front view of a stator of a rotating electric machine according to a first embodiment.

[0013] 1, a rotating electric machine 1 is used as an electric motor or a generator. The rotating electric machine 1 includes a rotor 2 and a stator 3.

[0014] The rotor 2 is provided so as to be rotatable about the axis of the rotating electrical machine 1. The stator 3 is formed in an annular shape.

[0015] Next, the main part 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 rotating electric machine according to the first embodiment.

[0016] 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 wire connections 7.

[0017] 2, the teeth 4 are arranged in an annular shape. The teeth 4 protrude toward the inside of the rotating electric machine 1. Each of the teeth 4 is formed by laminating a plurality of core materials 4a.

[0018] The insulators 5 are made of a thermoplastic resin. The insulators 5 cover the teeth 4, respectively.

[0019] Although details are not shown in FIG. 2, the multiple windings 6 are wound around the multiple insulators 5 in a concentrated manner.

[0020] The multiple wire connectors 7 connect the ends of the multiple windings 6 to the ends of external wiring, respectively.

[0021] Next, the insulator 5 will be described with reference to FIG. FIG. 3 is a perspective view of an insulator of a stator of a rotating electric machine according to the first embodiment.

[0022] As shown in Fig. 3, the insulator 5 is made of a thermoplastic resin. A main portion of the insulator 5 is formed in a rectangular tube shape. The insulator 5 has a plurality of grooves 5a. The grooves 5a are aligned in the vertical direction on both outer surfaces of the insulator 5. Although details are not shown in Fig. 3, the longitudinal direction of the grooves 5a is perpendicular to the longitudinal direction of the windings 6.

[0023] Next, a method for fixing the plurality of windings 6 and the wire connection body 7 will be described with reference to FIGS. Fig. 4 is a vertical cross-sectional view of a main part of the stator of the rotating electric machine according to embodiment 1. Fig. 5 is a perspective view of a main part of the stator of the rotating electric machine according to embodiment 1. Note that in Figs. 4 and 5, the up-down direction is the direction along the axis of the rotating electric machine 1. Also, in Fig. 5, the multiple windings 6 and the wiring bodies 7 are not shown.

[0024] 4, in a first resin body arrangement step, a worker arranges each of the multiple first resin bodies 8 in each of the grooves 5a on the outer surfaces of the multiple insulators 5. At this time, the worker arranges each of the multiple first resin bodies 8 so that each does not protrude outward from each of the grooves 5a on the outer circumferential surfaces of the multiple insulators 5. Thereafter, in a winding arrangement step, the worker winds the multiple windings 6 around the multiple insulators 5.

[0025] Then, in a second resin body arrangement step, the worker arranges the second resin bodies 9 above the windings 6 for each of the insulators 5. Then, in a wire connection body 7 arrangement step, the worker arranges the wire connection body 7 above one of the second resin bodies 9. Then, in a third resin body arrangement step, the worker arranges the third resin body 10 above the wire connection body 7.

[0026] Thereafter, in a resin body hardening step, an operator simultaneously heats and melts the plurality of first resin bodies 8, the plurality of second resin bodies 9, and the third resin body 10, and then hardens them.

[0027] Next, the state of the stator 3 after the heat treatment will be described with reference to FIG. 6 is a vertical cross-sectional view of a main part of a stator of a rotating electric machine according to embodiment 1. In addition, in FIG.

[0028] 6, each of the first resin bodies 8 flows between each of the insulators 5 and each of the windings 6 from the side to the bottom of each of the insulators 5, and then hardens. Each of the second resin bodies 9 hardens above the windings 6 for each of the insulators 5. The third resin body 10 hardens to surround the wire connection body 7.

[0029] According to the first embodiment described above, the first resin body 8 is disposed between each of the multiple insulators 5 and the multiple windings 6. Therefore, after the heat treatment, the first resin body 8 hardens on the side and bottom of each of the multiple insulators 5 between each of the multiple insulators 5 and each of the multiple windings 6. As a result, the adhesive force of the multiple windings 6 to the insulator 5 can be stabilized without impregnating the stator 3 with varnish.

[0030] Furthermore, the longitudinal direction of the multiple grooves 5a is perpendicular to the longitudinal direction of the multiple windings 6. Therefore, during heat treatment, the first resin body 8 flows all over the outer surface of the insulator 5 and then flows to the bottom of the insulator 5. This makes it possible to further stabilize the adhesive force of the multiple windings 6 to the insulator 5.

[0031] Moreover, the second resin body 9 hardens above the plurality of windings 6 with respect to each of the plurality of insulators 5. Therefore, the adhesive force of the plurality of windings 6 above the insulators 5 can be stabilized without impregnating the stator 3 with varnish.

[0032] Moreover, the third resin body 10 hardens on the outer periphery of the wire connection body 7. Therefore, the fixing force of the wire connection body 7 can be stabilized without impregnating the stator 3 with varnish.

[0033] The first resin body 8, the second resin body 9, and the third resin body 10 may be a thermosetting resin that melts and then hardens when heated. For example, the first resin body 8, the second resin body 9, and the third resin body 10 may be a varnish contained in a sheet. In this case, the first resin body 8 can be easily fitted into the groove 5a by forming the first resin body 8 into a shape that matches 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 multiple windings 6 on the upper part of the insulator 5 can be more stable. By wrapping the connector 7 with the third resin body 10, the fixing force of the connector 7 can be more stable.

[0034] Also, the resin body curing step may be divided into a first resin body curing step, a second resin body curing step, and a third resin body curing step. In this case, immediately after the winding arrangement step, in the first resin body curing step, the first resin body 8 may be heated to melt and then cured. Immediately after the second resin body arrangement step, in the second resin body curing step, the second resin body 9 may be heated to melt and then cured. Immediately after the third resin body arrangement step, in the third resin body curing step, the third resin body 10 may be heated to melt and then cured. [Explanation of symbols]

[0035] REFERENCE SIGNS LIST 1 rotating electric machine, 2 rotor, 3 stator, 4 teeth, 4a core material, 5 insulator, 5a groove, 6 winding, 7 wire connection body, 8 first resin body, 9 second resin body, 10 third resin body

Claims

1. A plurality of teeth arranged in an annular shape and protruding inwardly; a plurality of insulators each covering the plurality of teeth, each having a rectangular tube portion and each having grooves on both outer side surfaces of the rectangular tube portion; a plurality of windings wound around the plurality of insulators in a concentrated manner; a plurality of first resin bodies formed of a thermosetting resin and disposed in grooves of the plurality of insulators between the plurality of insulators and the plurality of windings; a plurality of second resin bodies formed of a thermosetting resin and disposed on top of each of the plurality of insulators and above the plurality of windings; a third resin body formed of a thermosetting resin and disposed above a wiring body disposed on an upper portion of any one of the plurality of second resin bodies; A stator for a rotating electric machine comprising:

2. 2. The stator of claim 1, wherein the grooves are formed so that a longitudinal direction of the grooves is perpendicular to a longitudinal direction of the plurality of windings.

3. A plurality of teeth arranged in an annular shape and protruding inwardly; a plurality of insulators each covering the plurality of teeth, each having a rectangular tube portion and each having grooves on both outer side surfaces of the rectangular tube portion; a plurality of windings wound around the plurality of insulators in a concentrated manner; 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 plurality of second resin bodies formed of a thermosetting resin and cured on the upper portions of the plurality of insulators and the plurality of windings; a third resin body formed of a thermosetting resin and cured on an outer periphery of a connecting body disposed on an upper portion of any one of the plurality of second resin bodies; A stator for a rotating electric machine comprising:

4. 4. The stator for a rotating electric machine according to claim 3, wherein the grooves are formed so that a longitudinal direction of the grooves is perpendicular to a longitudinal direction of the plurality of windings.

5. 5. The stator of a rotating electric machine according to claim 3 or claim 4, wherein each of the plurality of first resin bodies flows between each of the plurality of windings to a lower portion of each of the plurality of insulators, and then the plurality of first resin bodies harden.

6. a first resin body arrangement step of arranging a plurality of first resin bodies in grooves on both side surfaces of an outer side of a rectangular tube portion of a plurality of insulators covering the plurality of teeth, respectively; a winding arrangement step of winding a plurality of windings around the plurality of insulators after the first resin body arrangement step; a first resin body hardening step of heating and melting the first resin bodies after the winding arrangement step, and hardening the first resin bodies; a second resin body arranging step of arranging a plurality of second resin bodies on the upper part of each of the plurality of insulators and above the plurality of windings, after the winding arrangement step; a second resin body curing step of heating and melting the second resin bodies after the second resin body disposing step, and then curing the second resin bodies; a third resin body arrangement step of arranging a third resin body above a wire connection body arranged on an upper portion of any one of the plurality of second resin bodies; After the third resin body disposing step, a third resin body hardening step of heating the third resin body to melt it and then hardening it; A method for manufacturing a stator for a rotating electric machine comprising:

7. 7. The method for manufacturing a stator for a rotating electric machine according to claim 6, wherein the first resin body arrangement step includes a step of arranging each of the first resin bodies so that the first resin bodies do not protrude outward from each of the grooves on the outer circumferential surfaces of the insulators.

8. 8. The method for manufacturing a stator for a rotating electric machine according to claim 6 or claim 7, wherein the first resin body hardening process includes a process of heating and melting the multiple first resin bodies, causing them to flow to the bottom of each of the multiple insulators between each of the multiple insulators and each of the multiple windings, and then hardening the multiple first resin bodies.

9. The method for manufacturing a stator for a rotating electric machine according to claim 6 , wherein the first resin body curing step, the second resin body curing step, and the third resin body curing step are performed simultaneously.

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