JPH0956101A - Coil insulator for electric rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an interlayer insulator from being dislocated at the end of the coil due to vibration at the time of setting or shaping a coil or due to the force for bundling the coil end without requiring the troublesome work for coupling the coil side interlayer insulator sequentially with the coil end interlayer insulator. SOLUTION: An integration part 27 serving as a coil side interlayer insulator placed in the slot 22 of a core 21 is formed integrally with an integration part 28 serving as a coil end interlayer insulator placed in the slot 22 of core 21. This structure causes no dislocation of the interlayer insulator as compared with a conventional structure comprising the interlayer insulation parts 27, 28 separately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil insulator for a rotary electric machine that performs interlayer insulation of coil side portions inside slots of an iron core and interlayer insulation of coil end portions outside the slots.

[0002]

2. Description of the Related Art FIGS. 7 to 10 show an inter-pole insulating structure of a conventional rotating electric machine, for example, a stator coil for converting the number of poles. In the case of this, first, as shown in FIG. 7, the coil side portion of the coil 4 of the lower layer is housed in the slot 3 of the stator core 2 in which the slot insulator 1 is housed. The side interlayer insulating material 5 is inserted. Next, as shown in FIG. 8, on the coil end 4 a of the coil 4, below the end of the coil side interlayer insulating material 5 protruding from the slot 3,
A sheet-shaped coil-end interlayer insulator 6 is inserted, and the coil-end interlayer insulator 6 is inserted until it abuts an end of the slot insulator 1. Then, by inserting the coil side portion of the upper layer coil 7 (see FIG. 9) into the slot 3 from above, the coil side portion of the upper layer coil 7 and the coil side portion of the lower layer coil 4 are inserted. The coil side interlayer insulator 5 is sandwiched, and the coil end 7a of the upper coil 7 is sandwiched.
The coil end interlayer insulator 6 is sandwiched between the coil end 4a of the lower coil 4 and the coil end 4a.

[0003]

However, in the above-mentioned structure, the coil side interlayer insulating material 5 and the coil end portion interlayer insulating material 6 overlap each other at the portion of the coil side interlayer insulating material 5 protruding from the slot 3. However, the coil end interlayer insulator 6 is displaced as shown in FIG. 9 due to vibrations when the upper layer coil 7 is housed or when the coil ends 4a and 7a are molded. Therefore, it is necessary to correct the position of the coil end interlayer insulator 6, but at that time, since the coil 7 in the upper layer is already stored, it is difficult to correct it and it is difficult to correct it correctly.

Even if it is corrected correctly, after all the coils have been housed, as shown in FIG.
When the a and 7a are tightly bound with the binding thread 8, the coil end interlayer insulating material 6 is pulled out accordingly, and a shift occurs again,
After binding, it is impossible to correct the position of the coil end interlayer insulator 6, so that the interlayer insulation between the coil 4 of the lower layer and the coil 7 of the upper layer at the coil ends 4a and 7a is not complete. turn into.

On the other hand, there is one having a structure as shown in FIGS. 11 and 12 (Shokai 58-83964).
issue). In this structure, protrusions 11a and 11b are formed on both sides of both ends of the coil side interlayer insulating material 11, and two cuts 12a and 12b are formed on one edge of the coil end interlayer insulating material 12, respectively. Cut and cut 12a, 12b
By inserting the projections 11a, 11b into the coil, the coil end interlayer insulator 12 is connected to the coil side interlayer insulator 11 to prevent the coil end interlayer insulator 12 from being displaced as described above. Is.

[0006] However, in this structure, it is necessary to connect the coil end interlayer insulator 12 to the coil end interlayer insulator 12 one by one, and the protrusions 11a and 11b of the coil side interlayer insulator 11 are connected to each other. Coil end interlayer insulation 1
It was necessary to insert each of the two notches 12a and 12b one by one, which was troublesome. Further, the inserted projections 11a and 11b may come off from the cuts 12a and 12b, and it is not possible to reliably prevent the coil end interlayer insulating material 12 from being displaced.

The present invention has been made in view of the above circumstances, and therefore an object of the present invention is to prevent a vibration during storage of a coil or during molding, or a binding force at the time of binding the coil end portion, and thus a coil end interlayer insulating material. Can be surely prevented from shifting,
It is possible to obtain a sufficient insulation function, and it is troublesome to correct the position of the coil end interlayer insulator one by one, or the coil end interlayer insulator is connected to the coil side interlayer insulator one by one. It is an object of the present invention to provide a coil insulator for a rotating electric machine that can be achieved without such a trouble.

[0008]

In order to achieve the above object, in the coil insulator of the rotating electric machine of the present invention, the first
The coil side interlayer insulating portion functioning as a coil side interlayer insulating material sandwiched between the coil side interlayers in the iron core slot, and the coil edge interlayer insulating material outside the iron core slot. And a coil end interlayer insulating portion functioning as a coil end interlayer insulating material.

According to this first means, the coil side interlayer insulating portion functioning as the coil side portion interlayer insulating material is integrally connected to the coil end portion interlayer insulating portion functioning as the coil end portion interlayer insulating material. The difference from the conventional one, which is a separate body, will not occur. Further, it is not necessary to separately connect the integrated coil side interlayer insulating portion and the coil end interlayer insulating portion.

In the coil insulator for a rotating electric machine of the present invention, secondly, the coil end interlayer insulating portions are overlapped with each other outside the slot of the iron core, and an insulating adhesive tape is attached to the overlapped coil end interlayer insulating portions. It is characterized by being stuck and fixed in a cylindrical shape. According to the second means, the coil end interlayer insulating portions are fixed to each other by the insulating adhesive tape, so that the displacement is further prevented.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below.
This will be described with reference to FIGS. First, FIG. 1 shows an iron core 21 of, for example, a pole changing stator of a rotary electric machine, and a slot insulator 23 is provided in a slot 22 of the stator.
As shown in Fig. 2, the lower coil 2 is placed in the lower part.
The coil side portions 24a of No. 4 are housed in upper and lower two layers with the insole insulator 25 interposed therebetween.

A coil insulator 26 is arranged on the lower coil 24. This coil insulator 26 is shown in FIG.
As shown in, the coil side interlayer insulating portion 27 is provided in the central portion, and the coil end interlayer insulating portions 28 are provided at both ends, which are integrally formed by an insulating sheet. In this case, the coil end interlayer insulating portion 28 is wider than the coil side interlayer insulating portion 27, and has a width that is at least twice as large as that of the coil side interlayer insulating portion 27.
It is separated from 7a by a notch 29.

Further, both side portions 27a of the coil side interlayer insulating portion 27 are bent in a valley fold as indicated by a fold line 30, and in this bent state, the coil 24 of the lower layer in the slot 22 of the iron core 21 is bent. By inserting and arranging on the coil side part 24a, the coil side part interlayer insulation part 27 is made to function as a coil side part interlayer insulator (refer FIG. 2). Both side portions 27a of the coil side interlayer insulating portion 27
Are brought into contact with both inner side surfaces of the slot 22 due to the restoring force from the bent state, so that inclination and displacement in the slot 22 are prevented.

Also, with the coil side interlayer insulating portion 27 inserted in the slot 22, the coil end interlayer insulating portion 28 is inserted.
Protrudes outward in the axial direction of the slot 22 (see FIG. 1), thereby making the coil end interlayer insulating portion 28 function as a coil end interlayer insulating material. All of the coil end interlayer insulating portions 28 located axially outward of the slots 22 are sequentially overlapped with each other, and the coil end interlayer insulating portions 28 that overlap each other have:
As shown in FIG. 4, the insulating adhesive tape 31 is attached to the entire inner circumference of the root portion adjacent to the slot insulator 23 and fixed in a cylindrical shape.

The coil end 24b of the lower coil 24 also projects outward in the axial direction of the slot 22, and the interphase insulator 32 is provided between the coil ends 24b of the lower coil 24. Have been inserted.

Thereafter, the coil side portions 33a of the coil 33 of the upper layer shown in FIG. 5 are inserted into the slot 22 in the upper and lower two layers with the insole insulator 34 shown in FIG. 2 interposed therebetween. The coil side portion interlayer insulating portion 27 is sandwiched between the coil side portion 33a of the upper layer coil 33 and the coil side portion 24a of the lower layer coil 24. At the same time, the upper coil 33
The coil end 33b shown in FIG. 1 and the coil end 24b of the coil 24 in the lower layer sandwich the coil end interlayer insulating portion 28. In this case, those coil ends 24b, 33b
On the other hand, the coil end interlayer insulating portion 28 has a length equal to or larger than the coil end portion of the smaller protruding length (the coil end portion 33b of the upper layer coil 33 in the illustrated example). I am trying.

Further, the coil end 33 of the upper coil 33 is formed.
An interphase insulator 35 is inserted between the phases b, and a wedge 36 is inserted in the opening of the slot 22. In the case of this configuration, the lower coil 24 and the upper coil 3
3, the coil side interlayer insulating portion 27 and the coil end interlayer insulating portion 28 function as an inter-electrode insulator. Then, the coil ends 24b and 33b are tightly bound with a binding thread 37 as shown in FIG.

As described above, the coil insulator 26 of this construction is
A coil side interlayer insulating portion 27 that functions as a coil side interlayer insulating material and a coil end interlayer insulating portion 28 that functions as a coil end interlayer insulating material are integrally formed and have a coil. Since the coil end interlayer insulating portion 28 is integrally connected to the side interlayer insulating portion 27, there is no deviation as in the conventional case where they are separate bodies. Therefore, the coil end interlayer insulating portion 28 is also protected against vibrations when the upper layer coil 33 is housed or when the coil ends 24b and 33b are molded, and against the binding force of the coil ends 24b and 33b by the binding thread 37. The coil ends 24b and 33b can be properly retained at the interlayer sandwiching positions, and a sufficient insulating function can be obtained.

Further, according to this structure, the labor required for correcting the position of the coil end interlayer insulating material one by one in the conventional one is not necessary, and further, the coil side interlayer insulating portion 27 and the coil end are not required. Since the inter-layer insulating portion 28 is integrated, it is not necessary to connect it separately, the labor can be saved, and the workability of assembling can be improved. In addition, the coil side interlayer insulating portion 27 and the coil end interlayer insulating portion 28 do not need to be provided with a protrusion or a notch for connection, so that the processing cost can be reduced and the material yield can be improved. You can also

In addition, in this structure, since the insulating adhesive tape 31 is adhered to the coil end interlayer insulating portion 28 overlapping outside the slot 22 of the iron core 21 and fixed in a cylindrical shape, The end interlayer insulating portions 28 are fixed to each other by the insulating adhesive tape 31, whereby the coil end interlayer insulating portions 28 can be further prevented from being displaced, and a sufficient insulating function can be obtained more reliably.

Further, the coil end interlayer insulating portion 28 has a width which is at least twice the width of the coil side interlayer insulating portion 27, whereby the layers of the coil end portions 24b and 33b are more reliably separated from each other. Therefore, a more sufficient insulation function can be obtained. In addition, the coil end interlayer insulating part 2
8 is the upper coil end 33b and the lower coil end 24
It has a length equal to or larger than the coil end portion of b which has a smaller protruding length, which also ensures more reliable isolation between the coil end portions 24b and 33b. Therefore, a more sufficient insulation function can be obtained.

[0022]

The present invention is as described above.
The following effects are obtained. According to the coil insulator for a rotating electric machine of claim 1, it is possible to reliably prevent the coil end interlayer insulating material from being displaced due to vibrations when the coil is housed or molded, or binding force when the coil end is bound. It is possible to obtain a sufficient insulating function. In addition, it can be achieved without the trouble of correcting the position of the coil-end interlayer insulator one by one, or the trouble of connecting the coil-end interlayer insulator to the coil-side interlayer insulator one by one. As a result, the workability of assembling can be improved, and in addition, the processing cost can be reduced and the material yield can be improved.

According to the coil insulator of the rotating electric machine of the second aspect, it is possible to further prevent the displacement of the coil end interlayer insulating portion from occurring, and it is possible to more reliably obtain a sufficient insulating function. According to the coil insulator of the rotating electric machine of the third aspect, the layers at the coil ends can be more reliably isolated from each other, and a more sufficient insulating function can be obtained. According to the coil insulator of the rotating electric machine of the fourth aspect, the layers at the coil ends can be more reliably isolated from each other, and a more sufficient insulating function can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of one slot portion.

FIG. 3 is a plan view of a single coil insulator.

FIG. 4 is a perspective view showing a state where the main parts are assembled.

FIG. 5 is a developed plan view showing a state where the main parts are further assembled.

FIG. 6 is a developed plan view showing a state where the main parts are completely assembled.

FIG. 7 is a perspective view of a main part showing a conventional example.

FIG. 8 is a diagram corresponding to FIG. 1;

FIG. 9 is a development plan view of a problem state of a main part

FIG. 10 is a development plan view of different problem states of main parts.

FIG. 11 is a plan view of an insulator showing a different conventional example.

FIG. 12 is a plan view of a connected state of an insulator.

[Explanation of symbols]

21 is an iron core, 22 is a slot, 24 is a lower layer coil, 2
4a is a coil side part, 24b is a coil end part, 26 is a coil insulator, 27 is a coil side part interlayer insulating part, 28 is a coil end part interlayer insulating part, 31 is an insulating adhesive tape, 33 is an upper layer coil, 33a Indicates a coil side portion, and 33b indicates a coil end portion.

Claims (4)

[Claims] 1. A coil side interlayer insulating portion functioning as a coil side interlayer insulating material sandwiched between layers of coil sides in a slot of an iron core, and a coil end layer outside the slot of the iron core. A coil insulator for a rotating electric machine, comprising a coil end interlayer insulating portion functioning as a sandwiched coil end interlayer insulating member integrally formed. 2. The coil end interlayer insulating portions are overlapped with each other outside the slots of the iron core, and an insulating adhesive tape is adhered to the overlapped coil end interlayer insulating portions to be fixed in a cylindrical shape. Item 1. A coil insulator for a rotating electric machine according to Item 1. 3. The coil insulator for a rotating electric machine according to claim 1, wherein the coil end interlayer insulating portion has a width that is at least twice the width of the coil side interlayer insulating portion. 4. The coil end interlayer insulating portion has a length equal to or greater than the coil end of the upper coil end and the lower coil end having the smaller protruding length. The coil insulator for a rotating electric machine according to claim 1, which is characterized in that.