JP2003309942A - Stator of rotary electric machine and rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of preventing an insulation failure from occurring by avoiding connecting wires to interfere with each other at their cross points. <P>SOLUTION: The rotor 10 of the rotary electric machine comprises a core having a plurality of slots U, V and W (U1 to 3, V1 3 and W1 to 3). The slots of the core are wound around with a winding via an insulating body. Connecting wire guide grooves 21 (21a to 21i) are formed in an insulating cover 17 of the axial end face of the insulating body so that the winding 18 wound around to the prescribed slot among the plurality of slots U, V and W is linearly led to the other slots. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of a rotary electric machine and a rotary electric machine, and more particularly to a stator of a rotary electric machine and a rotary electric machine having improved winding.

[0002]

2. Description of the Related Art Conventionally, it has been known that a stator of a rotary electric machine and a rotary electric machine use windings. For example, in the case of a brushless motor as a rotating electric machine using windings, it is difficult to determine the position of the crossover wire of the winding wire between the slots, and there is a problem that it is difficult to automatically crawl the winding wire and fix the winding wire. is there. Mutual interference between crossovers is also unstable,
In particular, at the intersection of the windings, there is a concern that the film covering the windings may come off. Although various techniques have been proposed to solve these problems, it is very difficult to eliminate the above inconveniences in consideration of automation of windings.

[0003]

For this reason, a plurality of recesses are formed on the outer peripheral side of the insulating cover, into which the crossovers of the coils of different phases are inserted, and a step is formed between adjacent bottom surfaces of these recesses. The technique described above is known (see, for example, Japanese Patent Laid-Open No. 10-4645). According to this prior art,
Since the crossover wires of the different-phase coils are inserted into the plurality of recesses and have steps, the crossover wires of the different-phase coils are displaced in the height direction. Moreover, since the crossovers are separated from each other by the wall of the recess, it is expected that the insulating performance is greatly improved as a whole.

However, in the above technique, the crossover wire is drawn into the recess on the outer peripheral side of the insulating cover, and the crossover wire is inserted in the groove or notch to prevent the winding wire from protruding. Not only there is the inconvenience that the workability is poor, including the pulling in of the winding wire, but when the structure itself is automated, it complicates the equipment, and the wires are burdened at the intersections of the winding wires. There is an inconvenience.

An object of the present invention is to provide a stator of a rotating electric machine and a rotating electric machine capable of preventing insulation failure in advance by avoiding mutual interference at crossing portions of crossovers. Another object of the present invention is to provide a rotating electric machine stator and a rotating electric machine capable of simplifying the operation related to a crossover of equipment related to windings.

[0006]

According to the stator of a rotary electric machine according to the present invention, the above-mentioned problem is solved by a core having a plurality of slots, and windings wound around the slots of the core through an insulator. A stator of a rotating electric machine, wherein crossover guide means is provided on an axial end surface of the insulator so as to linearly guide the winding wound in a predetermined slot among the plurality of slots to another slot. Is formed, and is solved.

According to the present invention, since the crossover guide means is formed on the axial end surface of the insulating portion so as to linearly guide the winding wound in a predetermined slot to another slot, By pulling the crossover towards the slot
The crossover of the winding will be guided by the guide means. In this way, the winding is guided only by drawing the crossover wire of the winding in the direction of the slot to be wound next, and the next slot, which occurs when the winding is made to crawl as in the prior art, occurs. It is not necessary to pull the crossover side of the winding in a direction different from.

The crossover guide means is preferably a crossover guide groove. When the crossover wire guide groove is formed in this manner, the crossover wire is inserted between the crossover wire guide grooves, and the crossover wire can be stably arranged. At this time, a plurality of crossover guide grooves formed on the axial end surface of the insulator are formed, and a plurality of crossover guide grooves are provided, each of which crosses on the axial end surface of the insulator. It is preferable that at least the portion where the windings intersect each other be provided with a difference in groove depth. In addition, the difference in the depth of the above-mentioned groove means that there is a difference in depth only at the intersections of the windings, a difference in depth over the entire length of the guide groove, etc. It includes various configurations capable of configuring the difference in depth.

As described above, since the groove depths are made different at the portions where the crossovers of the winding intersect,
It is possible to avoid mutual interference at the intersections of the crossovers of the windings and prevent the occurrence of insulation failure of the crossovers. In addition, automation of the crossovers is facilitated and there is almost no difference in the crossover of each phase, so that it is possible to provide a stator of a rotary electric machine capable of high-speed machining and simplification of equipment.

Further, the crossover guide means may be formed as a crossover guide projection. Even if the crossover guide means is formed as a crossover guide projection in this way, it is possible to perform the same operation as the above-mentioned groove. Is easy.

Further, a plurality of crossover guide projections formed on the axial end surface of the insulator are formed, and at a portion where the plurality of crossovers intersect or in the vicinity of the intersection,
The crossover guide projections may be formed with a difference in height. As a result, it is possible to avoid mutual interference at the intersections of the crossovers of the windings, and it is possible to prevent the insulation failure of the crossovers from occurring. In addition, automation of the crossovers is facilitated and there is almost no difference in the crossover of each phase, so that it is possible to provide a stator of a rotary electric machine capable of high-speed machining and simplification of equipment. Further, even if the crossover guide means is configured such that the guide groove is formed on the upper surface of the crossover guide protrusion, the same operational effect as described above can be obtained.

Further, the above problem can be solved by a rotating electric machine according to the present invention comprising a stator comprising at least one of claims 1 to 6. Since such a rotary electric machine has the advantages of the stator of the rotary electric machine described above as it is, it is possible to prevent the insulation failure due to the winding of the stator in the rotary electric machine, and to provide a rotary electric machine suitable for high-speed machining and facility simplification. It becomes possible to provide.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention.

1 to 10 show an embodiment of the present invention. FIG. 1 is a partial side view showing a connecting wire of a stator of a rotary electric machine, and FIG. 2 is an explanation of an axial end surface of an insulating member. FIG. 3, FIG. 3 is a partially enlarged explanatory view of FIG. 1, FIG. 4 is an explanatory view from the axial end face side of the insulating part showing a state in which a winding is wound in a slot, and FIG. 5 is another example. 6 is a partially enlarged explanatory view similar to FIG. 6, FIG. 6 is an explanatory view from the end face side in the axial direction of the insulating body showing a state in which a winding is wound in the slot of the example shown in FIG. 5, and FIG. 7 is a side view of FIG. Explanatory drawing, FIG. 8 is a partially enlarged explanatory view similar to FIG. 3 showing still another example, FIG. 9 is a partially enlarged explanatory view similar to FIG. 3 showing still another example, and FIG. 10 is an example of a motor. It is a schematic sectional drawing which shows.

The stator 10 of the rotating electric machine of this example is shown in FIGS.
As shown in FIG. 4, a core 11 having a plurality of slots U, V, W and slots U1, V1, W1 to
A winding 18 is wound around U4, V4, W4 via an insulator 13. The core 11 of this example is composed of a laminated iron core, and a through hole 15 in which a rotating shaft and the like are arranged is formed in the center.

The insulator 13 of this embodiment is made of synthetic resin, and has an insulator 16 for insulating the slot surface of the core 11 and an insulating cover 17 for insulating the axial end surface.
It consists of In this example, the insulator 1
Although 6 and the insulating cover 17 are integrally formed, they may be separately formed. Further, the insulator 13 of the present example includes an insulator that insulates the slot surface of the core 11 with an insulating paint or the like instead of the insulator 16.

Then, in the insulating cover 17 of the present example, when winding from the slots U1, V1, W1 at which the winding 18 is started to the next slots U2, V2, W2, it is guided linearly. The crossover guide groove 21 (2
1a, 21b, 21c) are formed. That is, the crossover guide groove 21 of the present example has a plurality of slots U1, V1, W1.
~ U4, V4, W4 predetermined slot (eg U
1, V1, W1) so as to linearly guide the winding wire 18 wound to other slots (for example, U2, V2, W2) to the axial end surface of the insulating cover 17 of the insulator 13, and to guide the crossover wire. The groove 21 (21a, 21b, 21c) is formed.

As shown in FIG. 2, the stator 10 of this embodiment has three winding phases U, V, and W, each of which has a winding 18 wound in four slots. is there.
Then, crossover wire guide grooves 21a to 21c are formed from the winding start slots U1, V1, W1 to the next slots U2, V2, W2, and crossover wires are formed from the slots U2, V2, W2 to the next slots U3, V3, W3. Guide grooves 21d to 21f are formed, and crossover guide grooves 21g to 21i are formed from these slots U3, V3, W3 to the last slots U4, V4, W4.
Are formed.

As shown in FIG. 3, the insulating cover 17 of the present example.
The crossover guide groove 21 (21a and 21d in this example)
Are formed with the same groove depth. The crossover guide groove 21a is formed by the crossover guide grooves 21b, 21c, 21d.
It has a site that intersects with. Similarly, the crossover guide groove 21d
Is a crossover guide groove 21a, 21b, 21c, 21e, 2
It has a site that intersects with 1f, 21g, and 21h. Less than,
Similarly, intersections of the crossover guide grooves shown in FIG. 2 are formed. Needless to say, the number of slots is not limited to this example, and thus the number of crossover guide grooves and the intersecting portions are not limited to the above example.

Since the plurality of crossover guide grooves 21 are formed linearly, the crossover guide grooves 21 (21a to 21i) of the insulating cover 17 respectively covering the axial end surface of the insulator 13 are formed linearly. The crossover wires 14 (14a to 14i) can be linearly moved from the slot in which the winding 18 is wound to the next slot. Since the crossover guide groove 21 is extended to the vicinity of the winding start side of the slot as shown in FIGS. 3 and 4, when the crossover 14 is tensioned from the next slot side and pulled, The position of the crossover 14 will be determined.

5 to 7 show another embodiment. In the following example, the same members as those in the above example will be denoted by the same reference numerals and the description thereof will be omitted. As a crossover guide means, a plurality of crossover guide grooves 31 (31a, 31d)
In the insulating cover 17 that covers the end faces in the axial direction, portions where the crossovers 14 of the winding intersect are formed.
In this example, the crossover wire guide grooves 31 (31a, 3a, 3a, 3
An example is shown in which the depth of 1d) is different.

That is, as shown in FIG. 5, the crossover guide groove 3
The crossover guide groove 31d is shallower than 1a to provide a difference in depth of the crossover guide groove. In this example, when the crossover wire guide groove 31a corresponding to the start of winding into the slot is deepened and the winding wire is wound around the slot to guide the crossover wire to the next slot, the crossover wire guide groove 31a on the winding start side is formed. By forming the crossover wire guide groove 31d that leads to the next slot to be shallow, a difference in depth occurs at the intersecting portion, and the entire winding wire is crossed so as to intersect on the crossover wire on the winding start side. Crossover guide groove 3 whose depth is gradually reduced from the beginning of winding to the end of winding
1 is set. This makes it possible to prevent the crossovers from interfering with each other even if the crossovers intersect.

In the above example, the case where there is a difference in depth over the entire length of the crossover guide groove has been described. However, the difference in groove depth is due to the difference in depth in the region where the windings intersect. Can be configured as. That is, in order to make the depths of the intersecting portions different, one side is formed to be inclined and deeper than the other side. By adjusting the depth while inclining the intersecting portion in this way,
It is possible to form a difference in the depth of the grooves generated between the guide grooves. Further, when the depth of the intersecting portion is adjusted by the inclination as described above, the groove provided in the insulating cover is larger than the case where the depth is sequentially increased from the winding start to the winding end of the winding slot as described above. Since the depth of the insulation cover can be reduced, the thickness of the insulating cover can be reduced.

Further, regarding the depth of the crossover guide groove, the winding is formed in a shallower order according to the winding order, that is, the first winding and the latter winding, and the slots for winding the winding sequentially in each phase. The crossover guide groove can be gradually formed shallower. As a matter of course, in order to make the depth of the crossover guide groove to the crossing point and slot of each phase different, one side should be inclined and deeper than the other in the area where the crossover guide groove intersects. It can be formed.

FIG. 8 shows still another embodiment. In the above-mentioned embodiment, the crossover guide means is formed by a crossover guide groove, but in this example, the crossover guide means is projected. This is an example formed by (stays) 33 and 34. That is, on the insulating cover 17 of the insulator 13, the slots U1, V1, W1 from which the winding 18 is started to the next slot U2.
When winding around V2 and W2, so as to guide it linearly,
Protrusions (stays) 33 and 34 are formed as crossover guide means. The protrusions 33 and 34 of this example are V-shaped (or U-shaped) in which depressions 33a and 34a having a low center are formed.
The protrusions 33 and 34 have substantially the same height. The protrusions 33 and 34 can be formed on the insulating cover 17 later, but they can be integrally formed when the insulating cover 17 is formed.

FIG. 9 shows still another embodiment. In this example, the order of winding the heights of the protrusions 35 and 36 at a portion where a plurality of connecting lines intersect or in the vicinity of the intersecting portion corresponds to the order. And is changing. In other words, the protrusion 36 on the winding side is first formed low, and the protrusion 35 to be wound later is made high, so that the protrusion is formed higher as it is wound later.
Even if formed as described above, the same effect as the above-described crossover wire guide groove can be obtained, and mutual interference at the crossing portion of the crossover wire of the winding can be avoided, and the occurrence of defective insulation of the crossover wire. It can be prevented. In addition, automation of the crossovers is facilitated and there is almost no difference in the crossover of each phase, so that it is possible to provide a stator of a rotary electric machine capable of high-speed machining and simplification of equipment.

In the examples of FIGS. 8 and 9, there is shown an example in which a projection is formed in the vicinity of the portion where the crossovers intersect, on the slot position side of the winding sequence, but it is not shown.
It is also possible to form a projection at the intersection of the crossovers, form a plurality of grooves on the upper surface side of the projections, and combine the projections and the grooves to guide the crossover. At this time,
The depth of the groove formed on the upper surface side of the protrusion may be formed differently as in the case of the above-described crossover guide groove so as to guide the crossover. Further, the crossover may be guided by a small number of protrusions having different heights, that is, a plurality of protrusions in two stages.

FIG. 10 shows an example of a motor as a rotary electric machine using the above-mentioned stator. Although an example of the outer rotor type is shown in this example, it goes without saying that the rotating electric machine using the stator of this example is not limited to this. The same members and the like as those shown in each of the above examples are designated by the same reference numerals, and the description thereof will be omitted.

The rotating electric machine M of this example is the stator 1 described above.
0 (ie stator core 1 with multiple slots)
1, winding 18, insulator 13 (insulator 16 and insulating cover 17) and crossover 14, crossover guide grooves 21, 3
1), a rotary shaft 40, a rotor 41, a bearing 42, a bearing housing 43, a bracket cover 44, a bottom plate 45, and the like.

The rotor 41 is composed of a permanent magnet or the like,
The bearing 42 is arranged so as to face the magnetic pole surface of the stator 10, and the bearing 42 rotatably holds the rotor 41, and the bearing housing 43 holds the bearing 42 and the stator 10. The bottom plate 45 fastens and fixes the bearing housing 43 and the bracket cover 44. In the case of a brushless motor, a power element section, a control circuit, a drive circuit component, etc., which are not shown, are provided.

According to the motor having the above-mentioned structure, it is possible to prevent insulation failure due to the winding of the stator, which is suitable for high-speed machining and simplification of equipment. The rotary electric machine is not limited to the example shown in FIG. 8 and can be applied to a motor having a stator using a crossover wire or the like.

The present invention includes the following embodiments. A. A stator of a rotating electric machine, comprising: a core having a plurality of slots; and windings wound around the slots of the core via an insulator, wherein the winding is wound around a predetermined slot of the plurality of slots. So as to linearly guide the wire to another slot, crossover guide means (grooves or projections) are formed on the axial end surface of the insulator, and a plurality of crossover guide means (grooves or projections) are formed. At the same time, each of the plurality of crossover wire guide means (grooves or protrusions) has a portion that intersects on the axial end face of the insulator, and the crossover wire guide means (grooves or protrusions) first winds a winding wire. A stator and a rotating electric machine in which grooves are sequentially formed from a rotating slot so that the depths of the grooves are different.

B. A stator of a rotating electric machine, comprising: a core having a plurality of slots; and windings wound around the slots of the core via an insulator, wherein the winding is wound around a predetermined slot of the plurality of slots. So as to linearly guide the wire to another slot, crossover guide means (grooves or projections) are formed on the axial end surface of the insulator, and a plurality of crossover guide means (grooves or projections) are formed. At the same time, each of a plurality of formed crossover guide means (grooves or protrusions) has a portion intersecting on the axial end face of the insulator, and the crossover guide means (grooves or protrusions) has a plurality of phases U, At V, W, ...
The groove is sequentially formed from the slot in which the winding is wound in the first phase, and the groove is formed to be high, and the protrusion is formed to be high. A stator and rotating electric machine with different groove depths as W ...

[0034]

According to the present invention, a crossover guide groove is formed on the axial end face of the insulating member so that the winding wound in a predetermined slot is linearly guided to another slot. , By pulling the crossover towards the next slot,
The crossover of the winding will be guided in the guide groove.
In this way, the winding is guided only by pulling the winding crossing in the direction of the slot to be wound next, and the next slot, which occurs when the winding is made to crawl like the prior art, is performed. Eliminates the need to pull the crossover side of the winding in different directions.

As described above, since the groove depths are made different at the portions where the crossovers of the winding intersect,
It is possible to avoid mutual interference at the intersections of the crossovers of the windings and prevent the occurrence of insulation failure of the crossovers. In addition, automation of the crossovers is facilitated and there is almost no difference in the crossover of each phase, so that it is possible to provide a stator of a rotary electric machine capable of high-speed machining and simplification of equipment.

Since such a rotary electric machine has the advantages of the stator of the rotary electric machine as it is, it is possible to prevent insulation failure due to the winding of the stator in the rotary electric machine, which is suitable for high-speed machining and simplification of equipment. It is possible to provide a rotating electric machine.

[Brief description of drawings]

FIG. 1 is a partial side view showing a connecting wire of a stator of a rotating electric machine.

FIG. 2 is an explanatory diagram of an axial end surface of an insulating portion.

3 is a partially enlarged explanatory view of FIG. 1. FIG.

FIG. 4 is an explanatory view from the axial end surface side of the insulating body showing a state in which a winding is wound around a slot.

FIG. 5 is a partially enlarged explanatory view similar to FIG. 3 showing another example.

6 is an explanatory diagram from the axial end face side of the insulating body showing a state in which a winding is wound around the slot of the example shown in FIG.

FIG. 7 is an explanatory view from the side of FIG.

FIG. 8 is a partially enlarged explanatory view similar to FIG. 3 showing still another example.

FIG. 9 is a partially enlarged explanatory view similar to FIG. 3 showing still another example.

FIG. 10 is a schematic cross-sectional view showing an example of a motor.

[Explanation of symbols]

10 stator, 11 core, 13 insulator, 14
(14a-14i) Crossover wire, 15 Through hole, 16
Insulator, 17 insulation cover, 18 winding,
21 (21a, 21b, 21c, 21d, 21e, 2
1f, 21g, 21h, 21i), 31 crossover guide groove, 33, 34, 35, 36 protrusion, 40 rotary shaft,
41 rotor, 42 bearing 42, 43 bearing housing, 44 bracket cover, 45 bottom plate,
Slots U, V, W (U1, V1, W1 to U4, V4,
W4), M motor.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5H603 AA03 AA09 BB01 BB02 BB09                       BB10 BB12 CA01 CA05 CA10                       CB03 CB04 CB18 CB26 CC11                       CC17 CD02 CD21 CE01 EE02                 5H604 AA05 AA08 BB01 BB10 BB14                       BB17 CC01 CC05 CC16 PB03                       PC01 PC03 QB01 QB14

Claims (7)

[Claims] 1. A stator of a rotary electric machine, comprising: a core having a plurality of slots; and windings wound around the slots of the core with an insulator interposed between the core and the core. A stator of a rotary electric machine, wherein a crossover guide means is formed on an axial end surface of the insulator so as to linearly guide the formed winding to another slot. 2. The stator for a rotary electric machine according to claim 1, wherein the crossover guide means is a crossover guide groove. 3. A plurality of the crossover guide grooves are formed, and each of the plurality of crossover guide grooves has a crossing portion on an axial end face of the insulator, and at least windings cross each other. The stator of a rotary electric machine according to claim 2, wherein the depth of the groove is different in each portion. 4. The stator of a rotary electric machine according to claim 1, wherein the crossover guide means is a crossover guide projection. 5. A plurality of the crossover guides are formed, and a difference in height of the crossover guides is provided in a portion where the plurality of crossovers intersect or in the vicinity of the crossing portion. The stator of a rotary electric machine according to claim 4. 6. The stator of a rotating electric machine according to claim 4, wherein the crossover guide means has a guide groove formed on an upper surface of the crossover guide projection. 7. A rotating electric machine comprising a stator comprising at least one of claims 1 to 6.