JP2003219591A - Dynamo electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assure insulation between adjoining joint parts of a plurality of conductor segments, while reducing the size of a dynamo electric machine. <P>SOLUTION: The coil of a dynamo electric machine 10 is formed by disposing/inserting, circumferentially and radially, a plurality of almost U-shaped conductor segments 16 in slots 14 of a stator 12, bending the conductor segments 16 protruding from the slots 14 down to a prescribed positions, and jointing the ends of the conductor segments 16 together at the positions. A band-like resin spacer 20, having a high insulation performance, is inserted in the gap between joint parts 18 adjoining radially among the parts where the ends of the conductor segments 16 are jointed (joint parts 18). Thus, a proper insulation performance is kept between the joint parts, while the gaps between the joint parts are minimum, for the compact dynamo electric machine 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rotary electric machine,
More specifically, the present invention relates to a rotating electric machine including a coil formed by arranging a plurality of conductor segments in a circumferential direction and a radial direction in slots formed in a core of the rotating electric machine and joining the plurality of conductor segments to each other.

[0002]

2. Description of the Related Art Heretofore, as a rotary electric machine of this type, a plurality of U-shaped conductor segments, which are arranged in a slot of a stator core in a circumferential direction and a radial direction, are joined to each other by projecting (tip) portions thereof. A device including a coil (hereinafter, this joint portion is referred to as a joint portion) has been proposed (for example, JP 2000-166148 A).
In this rotary electric machine, in order to ensure insulation between the joints where the insulating coating is peeled off for joining, the conductor segments themselves are deformed to form a predetermined gap between the conductor segments adjacent in the radial direction. As a result, it is possible to prevent the occurrence of a short circuit such as contact between adjacent conductor segments.

[0003]

However, in a high-power type rotating electric machine used in a rotating electric machine for traveling of an automobile, there are cases where sufficient insulation cannot be ensured due to such a gap, and the insulating property is high. Even if it is possible to secure the above, since the gap must be made large, the coil end portion inevitably becomes large, leading to an increase in the size of the rotating electric machine.

One object of the rotating electric machine of the present invention is to ensure sufficient insulation between the conductor segments that are adjacent in the radial direction and to make the rotating electric machine compact. Another object of the rotating electric machine of the present invention is to ensure sufficient insulation between conductor segments that are adjacent in the radial direction with a simple configuration.

[0005]

MEANS FOR SOLVING THE PROBLEMS AND OPERATIONS AND EFFECTS THEREOF The rotating electric machine of the present invention employs the following means in order to achieve at least a part of the above objects.

A rotating electric machine according to the present invention includes a coil formed by arranging a plurality of conductor segments in circumferential and radial alignments in slots formed in a core of the rotating electric machine and joining the plurality of conductor segments to each other. A rotating electric machine comprising: a spacer formed of a material having a high insulating property, the spacer being inserted between the joint portions that are adjacent to each other in the radial direction among the joint portions that are the portions where the plurality of conductor segments are joined. Use as a summary.

In the rotating electric machine of the present invention, a spacer made of a highly insulating material is inserted between the joints adjacent in the radial direction. By inserting this spacer, good insulation between the joints can be secured, and at the same time,
It is possible to minimize the gap between the joint portions that are adjacent to each other in the radial direction, and suppress enlargement of the coil end portion.

In the rotating electric machine of the present invention as described above, the spacer may be an integral spacer inserted between the plurality of joint portions formed in the circumferential direction. With this configuration, it is possible to secure the insulation between the joint portions that are adjacent in the radial direction with a simpler configuration.
In the rotating electric machine according to the aspect of the invention, the integral spacer may be a strip-shaped spacer.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described using examples. FIG. 1 is a configuration diagram showing a schematic configuration of a part of a rotary electric machine 10 that is an embodiment of the present invention, and FIG. 2 is a configuration diagram showing a schematic configuration when the rotary electric machine 10 of the embodiment is viewed from above. Is. 3 is a cross-sectional view showing the AA cross section of the rotary electric machine 10 of FIG. As shown in FIG. 1, the rotary electric machine 10 of the embodiment has a slot 14 in which a substantially U-shaped conductor segment 16 is formed in a stator 12.
And a plurality of conductor segments 16 projecting from the slots 14 are bent to predetermined positions facing each other, and end portions of the conductor segments 16 are joined together by welding or the like to form a phase coil. I have it. The rotary electric machine 10 of the embodiment is configured as, for example, a synchronous generator motor capable of generating power, including a stator in which a plurality of such phase coils are formed at predetermined phase angles, and a rotor having a permanent magnet attached to the outer surface thereof. ing.

Among the portions where the plurality of conductor segments 16 are joined to each other (hereinafter referred to as joints 18), the gap between the joints 18 which are adjacent in the radial direction is made of a material having a high insulating property (for example, resin). The formed spacer 20 is inserted. This spacer 20, as shown in FIG.
It is formed as a strip having a length that can insulate between the plurality of joints 18 arranged in the circumferential direction. Therefore, by inserting the strip-shaped spacer 20 into the gap between the plurality of joint portions 18 in the circumferential direction, the adjacent joint portions 18 do not come into contact with each other even with a relatively large vibration from the outside. Therefore, good insulation can be secured. The height of the spacer 20 (the length in the vertical direction in FIG. 3) may be set as appropriate in consideration of the insulation distance between the adjacent joints 18. Further, the spacer 20 has a shape in which the cross-sectional area becomes smaller on the insertion side, that is, the length in the left-right direction of FIG. It is preferable to have a wedge shape such that

According to the rotating electric machine 10 of the embodiment described above, since the spacer 20 having a high insulating property is inserted into the gap between the joint portions 18 which are adjacent to each other in the radial direction, the joint portion 18 is also affected by external vibration or the like. Good insulation can be secured without short-circuiting each other, and at the same time, the spacer 2
Since the gap between the adjacent joints 18 in the radial direction can be set to a minimum by setting 0, the coil end can be made compact and the rotating electric machine 10 can be miniaturized.

Further, according to the rotary electric machine 10 of the embodiment, it is possible to make the structure simple by inserting the spacer 20 into the gap between the joint portions 18. In addition, since the spacer 20 is a belt-shaped member having a length that can insulate the plurality of joint portions 18 in the circumferential direction, productivity can be improved and a simpler configuration can be achieved.

In the rotating electric machine 10 of the embodiment, the plurality of joint portions 18 formed in the circumferential direction are insulated from each other by using the integral band-shaped spacer 20, but it is necessary to insulate each joint portion or As a gap between a plurality of joints in the circumferential direction is divided into a plurality of blocks, a separate spacer (for example, a strip-shaped spacer) is used for each block to insulate the plurality of joints in the circumferential direction. I don't mind.

Although the embodiments of the present invention have been described with reference to the embodiments, the present invention is not limited to the embodiments of the present invention, and various embodiments are possible without departing from the gist of the present invention. Of course, it can be implemented in.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of part of a rotary electric machine 10 that is an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a schematic configuration of the rotary electric machine 10 of the embodiment when viewed from above.

3 is a cross-sectional view showing an AA cross section of the rotary electric machine 10 of FIG.

[Explanation of symbols]

10 rotating electric machines, 12 stators, 14 slots, 1
6 conductor segments, 18 joints, 20 spacers.

Continued front page    F term (reference) 5H603 AA04 BB01 BB09 BB12 CA01                       CA05 CB03 CB11 CB16 CB24                       CC01 EE01 EE13 FA01 FA24                 5H604 AA05 BB01 BB14 CC01 CC05                       CC11 DB01 DB25 PB02 PC03                       QA06 QA08

Claims (3)

[Claims] 1. A rotary electric machine comprising a coil formed by arranging a plurality of conductor segments aligned in a circumferential direction and a radial direction in slots formed in a core of the rotary electric machine, and joining the plurality of conductor segments to each other. The rotating electric machine includes a spacer that is formed of a material having a high insulating property and that is inserted between the joint portions that are joint portions of the plurality of conductor segments and that are adjacent to each other in the radial direction. 2. The rotating electric machine according to claim 1, wherein the spacer is an integral spacer inserted between the plurality of joint portions formed in a circumferential direction. 3. The rotary electric machine according to claim 2, wherein the integral spacer is a strip-shaped spacer.