JPH06153433A - Stator for rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent loss of insulation of main, auxiliary windings due to deviation of an interlayer insulating sheet occurring by a force to be applied to coils at the time of molding the main winding or inserting the auxiliary winding. CONSTITUTION:A stator for a rotary electric machine comprises a stator core having a slot 4, a plurality of winding groups 2, 3 inserted into the slot 4, and an interlayer insulating sheet 10 inserted between the groups 2 and 3. The sheet 10 has bent pieces 10c, 10d bent in the same direction at both end sides in such a manner that the one piece 10d is formed laterally longer than the other piece 10c. In this case, it is desirable to so dispose in a direction and insert the sheet 10 that the piece 10d is bent at the time of shaping coil ends of the groups.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a stator of a rotary electric machine used in, for example, an electric motor for a hermetic compressor.

[0002]

2. Description of the Related Art A conventional stator of this type of electric motor has a main winding and an auxiliary winding in a slot of a stator core via an interlayer insulating paper, as shown in Japanese Utility Model Publication No. 48-25041. The inter-layer insulating paper was inserted along the inside of the slot insulating paper while being folded into a U-shape or a gutter shape.

[0003]

By the way, in this type of motor, the inter-layer insulating paper inserted between the main winding and the auxiliary winding is inserted simultaneously with the main winding when the main winding is inserted by the insert machine. The manufacturing process is usually taken. Therefore, in the case of an interlayer insulating paper having a shape similar to the conventional one, since the widthwise length of the folded piece of the interlayer insulating paper is even on the left and right sides, when the main winding is formed or the auxiliary winding is formed. The force applied to each coil at the time of insertion may cause the interlayer insulating paper to be displaced, and this displacement may cause a portion where the interlayer insulating paper is not applied to the winding, and impair the insulation between the main winding and the auxiliary winding. there were. Therefore, the arrow-shaped interlayer insulating paper 1 as shown in FIG. 3 is used, and the main winding 2 as shown in FIG.
It is also inserted between the auxiliary winding 3 and the auxiliary winding 3. In addition,
4 is a slot and 5 is a wedge. However, in this case as well, the folding lines 1a and 1b provided on the interlayer insulating paper 1 are provided at symmetrical positions as seen in the width direction as shown in FIG. 1
The widths of c and 1d are the same as those of the U-shape in that the widths of the c and 1d are equal to each other at the time of insertion as shown in FIG. 4, so the force applied during the formation of the main winding causes the interlayer insulating paper 1 to be displaced. Although the generated points were somewhat prevented by the arrow shape, they could not be sufficiently prevented. An object of the present invention is to provide a stator of a rotary electric machine that solves the above-mentioned problems (problems) of conventional ones.

[0004]

In order to solve the above-mentioned problems, a stator of a rotating electric machine according to the present invention has a stator core having a slot, a plurality of winding groups inserted in the slot, and In a stator of a rotating electric machine comprising an inter-layer insulation paper inserted between winding groups, the inter-layer insulation paper has bending pieces at both ends that can be bent in the same direction, and these folding pieces are One is formed longer than the other in the width direction. In this case, it is desirable that the inter-layer insulating paper be inserted by arranging the bent piece having the longer width in a direction that can be bent when shaping the coil end of the winding group.

[0005]

In the present invention, of the left and right bent pieces forming the interlayer insulating paper, the longer one in the width direction is caught by the coil, so that the force applied to the interlayer insulating paper during coil forming is weak. And the gap is reduced. Also,
The force of this displacement moves in the direction opposite to the bending direction of the coil, so that the insulation between the main winding and the auxiliary winding can be maintained even if some displacement occurs.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment shown in FIGS. In the present invention, in order to solve the above problems, as shown in FIG. 1, the folding lines 10a and 10b formed on both left and right ends of the interlayer insulating paper 10 are asymmetrical when viewed from the width direction. The inter-layer insulating paper 1 which is placed at the position of 1 and is formed by these folding lines 10a and 10b.
The width of the bending pieces 10c and 10d of 0 is formed so that the width length of one (for example, the bending piece 10d) is larger than the width length of the other (folding piece 10c). Has the first characteristic in its configuration. The second characteristic of the structure is that, when the interlayer insulating paper 10 is inserted between the main winding and the auxiliary winding in the slot, as shown in FIG.
The main winding 2 and the auxiliary winding 3 are arranged such that the longer bent piece 10d is arranged and inserted in the direction in which the coil is bent when forming the coil. By doing so, the bent piece of the longer width among the bent pieces of the interlayer insulating paper is caught by the coil, and the main winding 2
The force applied to the inter-layer insulating paper 10 at the time of forming the coil is weakened because it has a canceling relationship with the bending direction of the coil, and the deviation is greatly reduced. Therefore, the insulation state between the main winding and the auxiliary winding is maintained depending on the degree of deviation.

[0007]

Since the present invention is constructed as described above,
It has the following excellent effects. Of the bent pieces of the interlayer insulating paper, the longer one is caught by the coil, so the force applied to the interlayer insulating paper during coil forming becomes weaker, and the deviation of the interlayer insulating paper is larger than that of the conventional one. Decrease to. Further, in this case, since the displacement force moves in the direction opposite to the direction in which the coil is bent, the insulation state between the main winding and the auxiliary winding can be maintained even if such a displacement occurs.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an interlayer insulating paper of the present invention.

FIG. 2 is a vertical sectional front view showing a state of a slot portion of a stator having an interlayer insulating paper of the present invention inserted therein.

FIG. 3 is a plan view showing a conventional arrow-shaped interlayer insulating paper.

FIG. 4 is a vertical sectional front view showing a state of a slot portion of a stator having a conventional arrow-shaped interlayer insulating paper inserted therein.

[Explanation of symbols]

 2: Main winding 3: Auxiliary winding 4: Slot 10: Interlayer insulating paper 10c, 10d: Bent piece

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[Procedure amendment]

[Submission date] July 19, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Figure 3]

[Fig. 2]

[Figure 4]

Claims (2)

[Claims] 1. A stator of a rotating electric machine comprising a stator core having a slot, a plurality of winding groups inserted into the slot, and an interlayer insulating paper inserted between the winding groups. In the above, the interlayer insulating paper has bending pieces on both ends that are bent in the same direction, and these bending pieces are formed so that one side is longer than the other side in the width direction. stator. 2. The fixing of a rotary electric machine according to claim 1, wherein the inter-layer insulating paper is configured such that a bent piece having a longer width is arranged and inserted in a direction in which the coil end of the winding group can be bent when shaping the coil end. Child.