JPH06237545A - Stator of rotary electric machine - Google Patents

Abstract

PURPOSE:To simplify the combination operation of tooth iron cores with yoke cores when a stator core is divided into the tooth iron cores and the yoke cores, to solve a problem that a tooth is deformed when it is stamped, to prevent a coil from being damaged when an insulating wedge is inserted and to prevent the coil from being damaged, disconnected and the like when the iron cores are combined. CONSTITUTION:Tip parts of individual teeth 15 for a tooth iron core 12 are formed in such a way that a slot opening part 17 between the tip parts of the individual teeth 15 is set to a width size which is larger than an opening part 19 in a slot insulator 18, and the width size W15 at the tip parts of the individual teeth 15 is made small. In addition, an insulating wedge 21 is arranged and installed at the outside of the opening part 19 in each slot insulator 18 and at the inside of the yoke iron core 13. In addition, a space part is formed between the inside of the tip part of each tooth 15 of the tooth iron core 12 and the outside of each slot insulator 18, and the insulating wedge 21 is arranged and installed in the space part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for a rotating electric machine, which is constructed by dividing a stator core into a teeth core and a yoke core.

[0002]

2. Description of the Related Art Conventionally, as a stator of a rotary electric machine constituted by a stator core divided into a teeth core and a yoke core, for example, Japanese Patent Laid-Open No. 261028/1990.
The ones disclosed in JP-A-285954 and JP-A-3-18251 are known.

As shown in FIG. 13 and FIG. 14, these are composed of a stator core 1 divided into a tooth core 2 and a yoke core 3, and the slots 4 of the tooth core 2 have Each of the slot insulators 5 is internally mounted, a coil 6 is wound and housed inside the slot insulator 5 from the outside, and a yoke iron core 3 is combined with the tooth iron core 2.

In this case, however, the width of the tip of each tooth 7 of the tooth core 2 is W7, and the width of the slot opening 8 between the tips of the teeth 7 is W8.
The width dimension of the opening 9 of the slot insulator 5 is W9, and
8 = W9, that is, the tip end portion of each tooth 7 is formed so that the width dimension thereof is W7 so that the slot opening portion 8 and the opening portion 9 of the slot insulator 5 have the same width dimension.

Further, in this case, the insulating wedge 10 for preventing the coil 6 from protruding from the slot 4 is inserted inside the opening 9 of the slot insulator 5 and outside the coil 6.

[0006]

However, in the above-mentioned case, when the yoke core 3 is combined with the teeth core 2, the yoke core 3 is hard to fit into the teeth core 2 and must be applied unless a considerable force is applied. Therefore, there is a problem that the combination work is difficult.

The teeth core 2 is generally formed by punching steel plates into a predetermined shape and stacking them.
There is also a problem that the punching fold and deformation (warping) easily occur on the both sides of the tip of each tooth 7.

Further, in the structure in which the insulating wedge 10 is arranged inside the opening 9 of the slot insulator 5 and outside the coil 6, the insulating wedge 10 easily damages the coil 6 when the insertion wedge is inserted, and the insulating wedge 10 is insulated. There was a problem that it deteriorated the sex.

Moreover, in this case, there is a problem that it is difficult to insert the insulating wedge 10 when the amount of the coil 6 accommodated in the slot 4 is large, while when the amount of the coil 6 is small, the insulating wedge 10 inserted is small. Since the wedge 10 sometimes tilts or pops out, and the necessary insulation performance cannot be obtained, there is a problem that a separate means for preventing it is required.

In addition, when the amount of the coil 6 is large, a part of the coil 6 easily protrudes from the inside of the slot 4. Therefore, after the insulating wedge 10 is inserted, when the yoke core 3 is combined with the tooth core 2, the protrusion is generated. Also, there is a problem that a part of the coil 6 is sandwiched between the tooth iron core 2 and the yoke iron core 3 to be damaged or broken.

The present invention has been made in view of the above circumstances. Therefore, a first object of the present invention is to facilitate the work of assembling the tooth core and the yoke core, and to solve the problem of deformation of the tooth punching fold. It is to provide a stator of a rotating electric machine that can also be solved.

A second object of the present invention is, in addition to the above, that it is possible to prevent the wound coil from being damaged when the insulating wedge is inserted.
Also, the insertion of the insulating wedge itself can be done smoothly regardless of the amount of the coil in the slot, and the inclination of the insulating wedge
The problem of popping out is also to provide a stator of a rotating electric machine that can solve the problem without requiring special inclination preventing means and popping out preventing means.

A third object of the present invention is to provide a combination of a tooth core and a yoke core without causing a part of the coil to protrude from the slot even when the number of coils accommodated in the slot is large. Therefore, it is an object of the present invention to provide a stator of a rotating electric machine in which the teeth core and the yoke core can be combined with each other without causing damage or disconnection of the coil.

A fourth object of the present invention is to provide a stator of a rotating electric machine which can improve the insertability of the insulating wedge and can reliably hold the insulating wedge after the insertion.

A fifth object of the present invention is to provide a stator of a rotating electric machine, which can effectively prevent the coil from protruding from the inside of the slot by means of an insulating wedge.

A sixth object of the present invention is to provide a stator of a rotating electric machine capable of further improving the insertability of the insulating wedge which achieves the fourth object.

[0017]

To achieve the first object, in the stator of the rotating electric machine of the present invention, the stator core is divided into a teeth core and a yoke core, and the teeth core has the core. A slot insulator is installed in the slot, a coil is housed inside the slot insulator, and a yoke iron core is combined with the teeth iron core. It is characterized in that the slot opening portion between the tip end portions of the teeth is formed to have a width dimension larger than the opening portion of the slot insulator.

In order to achieve the second object, in the stator of the rotating electric machine of the present invention, in addition to the above-mentioned structure, an insulating wedge for preventing the coil from jumping out of the slot is provided in each slot insulator. It is characterized in that it is arranged outside the opening and inside the yoke core.

In order to achieve the third object, in the stator of the rotating electric machine of the present invention, a space is provided between the inside of each tooth tip of the tooth core and the outside of each slot insulator. The insulating wedge is arranged in the space.

In order to achieve the fourth object, in the stator of the rotating electric machine of the present invention, both sides of the insulating wedge are
It is characterized in that it is bent by 90 degrees or more and is pressed against both edges of the opening of the slot insulator.

In order to achieve the fifth object, in the stator of the rotating electric machine of the present invention, one side of each side of the insulating wedge is formed to have a length for pressing the coil inside the slot insulator by the outer surface portion. It is characterized by having done.

In order to achieve the sixth object, in the stator of the rotating electric machine of the present invention, a tapered insertion guide portion is formed on at least one of both ends of the bent portion of the insulating wedge. Is characterized by.

[0023]

According to the above-mentioned means, first, the width of each tooth tip of the tooth core is reduced. Thus, at each tooth tip portion of the teeth iron core formed to have such a small width dimension, the contact area between the yoke iron core and the yoke iron core in the folded combination is reduced, and the force required for the combination can be reduced. . Further, when the teeth core is formed by punching and stacking steel plates, the punching or laminating can prevent or prevent the deformation of the portions on both sides of each tooth tip from occurring due to the reduced width dimension.

In addition, in the case where the insulating wedge is arranged outside the opening of each slot insulator and inside the yoke core, the insulating wedge does not come into contact with the coil in the slot, and It can be inserted regardless of the situation, and can be kept in a stable state without the need for any special inclination or pop-out preventing means.

Furthermore, a space is provided between the inside of each tooth tip of the tooth core and the outside of each slot insulator.
In the case where the insulating wedge is arranged in this space, the insulating wedge can be inserted and held before the yoke iron core is combined with the tooth iron core, and the protruding of the coil from the slot can be suppressed and the tooth iron core You can combine the yoke cores.

In addition, in the case where both sides of the insulating wedge are bent by 90 degrees or more and pressed against both edges of the opening of the slot insulator, both sides of the insulating wedge should be in contact with the teeth iron core. It is possible to insert the insulating wedge without being inserted into the insulating wedge, and the insulating wedge can be reliably held after being inserted by the restoring force of the bent side portions of the insulating wedge.

Also, in the case where one side of both sides of the insulating wedge is formed to have a length for pressing the coil inside the slot insulator by the outer surface portion, the restoring force of one side of both sides of the insulating wedge is used. It is possible to prevent the coil from protruding from the inside of the slot.

In the case where the tapered insertion guide portion is formed on at least one side of both ends of the bent portion of the insulating wedge, by inserting the insulating wedge with the insertion guide portion facing forward, Insulation on both sides of the insulating wedge can be done naturally with its insertion.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. First, the stator core 1 is shown in FIG.
1 shows a tooth core 12 and a yoke core 13 which are formed separately and are combined by fitting them.

More specifically, the teeth core 12 is formed by punching steel plates into a predetermined shape and stacking them. As shown in FIG. 2, a large number of teeth 15 are radially provided around the ring portion 14. However, a slot 16 is provided between each tooth 15. Further, as shown in FIG. 3, the slot 16 extends from its inner peripheral portion to the slot opening portion 17,
The slot insulator 18 is integrally incorporated by, for example, a synthetic resin mold.

Here, the width of the tip of each tooth 15 of the tooth core 12 is W15, and the slot opening 17 is formed.
Has a width dimension W17 and the opening 19 of the slot insulator 18 has a width dimension W19, and W17> W19, that is, the width dimension of the slot opening 17 is larger than that of the opening 19 of the slot insulator 18. As described above, the tips of the teeth 15 are formed with the width dimension W15.

Thus, at the position inside the slot insulator 18 of the slot 16, the coil 20 is wound from the slot opening 17 and the opening 19 of the slot insulator 18 as shown in FIG. In this state, the teeth iron core 12 is combined with the yoke iron core 13 and then,
The insulating wedge 21 is inserted and arranged outside the opening 19 of each slot insulator and inside the yoke iron core 13 so as to prevent the coil 20 from protruding from each slot 16.

As described above, in this structure, the tip end portions of the teeth 15 of the tooth core 12 are connected to the teeth 15 respectively.
The slot opening 17 between the tip portions is formed to have a width dimension W15 larger than the opening portion 19 of the slot insulator 18, and therefore, the width dimension W15 of the tip portion of each tooth 15 is formed.
Is smaller than the width dimension W7 of the tip of each tooth 7 of the conventional tooth core 2.

Therefore, at the tip of each tooth 15 of the tooth core 12 formed by setting the width W15 small as described above, the contact area between the yoke core 13 and the yoke core 13 is reduced. However, since the force required for the combination can be reduced, the work of combining the tooth core 12 and the yoke core 13 can be easily performed.

Further, when the teeth core 12 is formed by punching and laminating steel plates, deformation of the parts on both sides of the tip of each tooth 15 due to the punching does not occur because the width W15 is reduced, or This can be less likely to occur, and thus the problem of deformation in the punching fold of the tooth 15 can be solved.

By disposing the insulating wedge 21 outside the opening 19 of each slot insulator 18 and inside the yoke core 13, the insulating wedge 21 is inserted without contacting the coil 20 in the slot 16. Because you can
It is also possible to avoid damaging the coil 20 with the insulating wedge 21, and it is possible to ensure good insulation of the coil 20.

Further, in this case, the insulating wedge 21 can be inserted regardless of the amount of the coil 20 in the slot 16. Even if the amount of the coil 20 is large, it is not difficult to insert, and the insertion is smooth. it can.

In addition, even when the amount of the coil 20 is small, the inserted insulating wedge 21 does not tilt or pop out, and the pop-out of the coil 20 can be reliably prevented. The required insulation performance can be reliably obtained, and it can be achieved without the need for special inclination or pop-out prevention means.

In contrast to the above, FIGS. 4 and 5 show the second embodiment of the present invention, and only the differences from the first embodiment will be described.
5 A space 22 is provided between the inside of the tip and the outside of each slot insulator 18, and the insulating wedge 21 is provided in this space 22.
Is located.

By doing so, the same effect as described above can be obtained, and the teeth core 12 and the yoke core 13 are provided.
The insulating wedge 21 can be inserted and held in the space portion 22 before being assembled, and the coil 2 from the inside of the slot 16 can be held.
Since the yoke core 13 can be combined with the tooth core 12 in a state where the protrusion of 0 is suppressed, the coil 2
It is possible to prevent a part of 0 from being sandwiched between the teeth iron core 12 and the yoke iron core 13 so as not to be scratched or broken, and a further effect of improving reliability can be obtained.

The slot insulator is not limited to the slot insulator 18 which is integrally embedded in the teeth iron core 12 by the synthetic resin molding described above. For example, the slot insulator is formed by bending a polyester film as shown in FIG.
6 may be inserted in the slot 6, or 25 may be integrally formed in the end plate 24 that covers the axial end surface of the tooth core 12 and inserted into the slot 16 as shown in FIG.

8 and 9 show the slot insulator 2 which is integrally formed with the end plate 24 and is inserted into the slot 16.
5 shows a third embodiment of the present invention configured by using No. 5 of the present invention.
In this case, however, the space 26 between the inside of the tip of each tooth 15 of the tooth iron core 12 and the outside of each slot insulator 25 has insulation formed by bending both side portions 27a and 27b by 90 degrees or more. Wedges 27 are provided, and both side portions 27a and 27b are pressed against each other at the time of insertion, and by the restoring force by releasing the pressing after the insertion, the outer surface portions of both sides of opening portion 28 of slot insulator 25 are removed. It is pressed against the edge.

By doing so, in addition to the effects of the first and second embodiments, the side edges 27a and 27b of the insulating wedge 27 are inserted without contacting the tooth iron core 12. Therefore, the insertability of the insulating wedge 27 can be improved, and the insulating wedge 27 can be held even after the insert wedge 27 is inserted.
It can be surely performed by the restoring force of a and 27b.

Further, in this case, one side portion 27a of the insulating wedge 27 is formed longer than the other side portion 27b so that the coil 20 inside the slot insulator 25 is pressed by the outer surface portion thereof, and With the restoring force of the one side portion 27a of the insulating wedge 27, it is possible to effectively prevent the coil 20 from protruding from the inside of the slot insulator 25.

FIGS. 10 to 12 show a fourth embodiment of the present invention, in which only differences from the fourth embodiment will be described. In the case of this one, both ends 29a and 29b of the insulating wedge 29 that bends both sides 29a and 29b by 90 degrees or more like the insulating wedge 27 have tapered insertion guides at both ends (up and down in the figure) of the bent portions 29a and 29b. Parts 30, 3
1 is formed, and an insulating wedge 29 is formed in the space 26 between the inside of the tip end of each tooth 15 of the tooth core 12 and the outside of each slot insulator 25 with the insertion guide portions 30 and 31 facing forward. By inserting, the slanted portions 30a and 31a on one side of the insertion guide portions 30 and 31 contact the inner upper edge of the yoke iron core 13, and the slanted portions 30 on the other side are inserted.
b and 31b are in contact with the outer upper edge of the slot insulator 25,
Both sides 29 of the insulating wedge 29 along the respective slopes
Since the a and 29b are naturally pressed in, it is possible to eliminate the need for pressing by hand one by one, and to improve the insertability of the insulating wedge 29 having the same effect as the third embodiment.

In this case, the insertion guide portions 30, 31
Need only be formed on at least one of both ends of the bent portions 29a and 29b of the insulating wedge 29. or,
FIG. 12 shows a projecting piece portion 32 formed by projecting from the end plate 24 portion of the slot insulator 25. Both ends of this projecting portion 32 are also formed in a tapered shape, and by the slanted portions 32a and 32b on both sides thereof, Since both sides 29a, 29b of the insulating wedge 29 are naturally pressed down together with the insertion of the insulating wedge 29, the insertability of the insulating wedge 29 can be further improved.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but may be implemented with various modifications without departing from the scope of the invention.

[0048]

The present invention is as described above,
It has the following effects. In the stator of the rotating electric machine according to claim 1, the stator core is divided into a teeth core and a yoke core, the slot of the teeth core is internally provided with a slot insulator, and the coil is accommodated inside the slot insulator. The tooth core is combined with a yoke core, and the tooth tip portions of the tooth core are arranged such that the slot openings between the tooth tip portions are larger than the opening portions of the slot insulator. Since the teeth core and the yoke core are combined with each other, the problem of the deformation of the tooth punching can be solved.

In the stator of the rotating electric machine according to claim 2,
In addition to the above configuration, the insulating wedge that prevents the coil from jumping out of the slot is disposed outside the opening of each slot insulator and inside the yoke iron core, so that the wound coil is folded when the insulating wedge is inserted. Also, the insulation wedge can be inserted smoothly, regardless of the amount of coil in the slot itself, and the problem of tilting and popping out of the insulating wedge does not require special tilting or popping-out prevention means. Can be solved.

In the stator of the rotating electric machine according to claim 3,
Further, a space is provided between the inside of each tooth tip of the tooth core and the outside of each slot insulator, and the insulating wedge is arranged in this space, whereby the yoke iron is combined with the tooth core. An insulating wedge can be inserted and held in the front, and the yoke core can be combined with the tooth core while the protrusion of the coil from the slot is suppressed by the insulating wedge, so that part of the coil is the tooth core and the yoke core. It is also possible to prevent it from being damaged by being sandwiched between and and not to be broken.

In the stator of the rotating electric machine according to claim 4,
By bending both sides of the insulating wedge by 90 degrees or more and pressingly contacting both edges of the opening of the slot insulator,
While the insertability of the insulating wedge is improved, the insulating wedge can be held even after it is inserted.

In the stator of the rotating electric machine according to claim 5,
By forming one side of both sides of the insulating wedge to have a length to press the coil inside the slot insulator by the outer surface portion, it is possible to effectively prevent the coil from protruding from the inside of the slot by the insulating wedge. .

In the stator of the rotating electric machine according to claim 6,
By forming the tapered insertion guide portion on at least one side of both ends of the bent portion of the insulating wedge, it is possible to further improve the insertability of the insulating wedge having the effect of the configuration according to claim 4. it can.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a rotating electric machine stator showing a first embodiment of the present invention.

FIG. 2 is a partial plan view of the tooth core alone.

FIG. 3 is a partial plan view showing a state in which a slot insulator of a tooth core is internally provided.

FIG. 4 is a view corresponding to FIG. 3 showing a second embodiment of the present invention.

FIG. 5 is a view equivalent to FIG.

FIG. 6 is a perspective view showing another example of the slot insulator.

FIG. 7 is a perspective view showing still another example of the slot insulator.

FIG. 8 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 9 is a perspective view of an insulating wedge alone.

FIG. 10 is a view corresponding to FIG. 9 showing a fourth embodiment of the present invention.

FIG. 11 is a development view of a single insulating wedge

FIG. 12 is a partial front view of a rotating electric machine stator.

FIG. 13 is a view corresponding to FIG. 1 showing a conventional example.

FIG. 14 is a view corresponding to FIG.

[Explanation of symbols]

11 is a stator core, 12 is a teeth core, 13 is a yoke core, 15 is teeth, 16 is a slot, 17 is a slot opening, 18 is a slot insulator, 19 is a slot insulator opening, 20 is a coil, 21 Is an insulating wedge, 22
Is a space portion, 23 and 25 are slot insulators, 26 is a space portion, 27 is an insulating wedge, 27a and 27b are both sides of the insulating wedge, 28 is an opening portion of the slot insulator, 29 is an insulating wedge, and 29a and 29b are Both sides of the insulating wedge,
Reference numerals 30 and 31 denote insertion guide portions.

Claims (6)

[Claims] 1. A stator core is divided into a teeth core and a yoke core, a slot insulator is internally provided in a slot of the teeth core, and a coil is housed inside the slot insulator, and the yoke is provided in the teeth core. In a structure in which iron cores are combined, each tooth tip portion of the tooth iron core is formed to have a width dimension such that a slot opening portion between the tooth tip portions is larger than an opening portion of a slot insulator. A stator of a rotating electric machine characterized by. 2. The rotary electric machine according to claim 1, wherein an insulating wedge for preventing the coil from jumping out of the slot is arranged outside the opening of each slot insulator and inside the yoke core. stator. 3. A space is provided between the inside of each tooth tip of the tooth core and the outside of each slot insulator, and an insulating wedge is provided in this space to prevent the coil from protruding from the slot. The stator of the rotating electric machine according to claim 1, wherein 4. The stator of a rotary electric machine according to claim 3, wherein both sides of the insulating wedge are bent at 90 degrees or more and are pressed against both edges of the opening of the slot insulator. 5. The stator for a rotary electric machine according to claim 4, wherein one side of each side of the insulating wedge is formed to have a length for pressing the coil inside the slot insulator by the outer surface portion. 6. The stator for a rotary electric machine according to claim 4, wherein a tapered insertion guide portion is formed on at least one side of both ends of the bent portion of the insulating wedge.