JP2018074803A - Stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator securing desired performance at low costs.SOLUTION: A stator 1, in which flection parts 31f and 32f are constituted in coil ends in a direction in which winding end parts 31a and 32a for connecting layers of cassette coils 31 and 32 to each other are not arranged, comprises: a first cassette coil group 41 which is constituted of a plurality of cassette coils 31 having the flection part 31f arranged at an upper side in a shaft direction of the stator; and a second cassette coil group 42 which is constituted of a plurality of cassette coils 32 having the flection part 32f arranged at a lower side in the shaft direction of the stator. The cassette coils 31 constituting the first cassette coil group 41 and the cassette coils 32 constituting the second cassette coil group 42 are arranged alternately so as to get in the turns of partner cassette coils respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stator using a cassette coil.

  Conventionally, as a technology in such a field, there is International Publication No. 2010/007950. In the stator described in this publication, coils are arranged in distributed winding with respect to a plurality of slots of the stator core.

  Conventionally, in the case of a distributed winding stator, if it is a round cross-section coil, it is an inserter system in which the coil and wedge are simultaneously inserted into the motor core using an insertion jig. The segment coil method is adopted.

International Publication No. 2010/007950

  However, in the inserter method, the manufacturing process is complicated, and facilities for winding, insertion, and molding are required. Here, since the equipment required when using the inserter method is large, the cost increases. Further, since it is difficult to position a thin round wire, it is necessary to interpose an operator and to make the equipment complicated, and the cost increases.

In the segment coil system, the number of coils increases, so the number of coil processing points increases. In addition, the number of processes and the number of processing points for conveying, positioning, and inserting the coil are large, and the number of processing points at the joint is also large, which increases the cost.
The present invention provides a stator structure that secures desired performance at low cost.

In the stator according to the present invention, a bent portion is formed at a coil end in a direction in which a winding end portion connecting the layers of the cassette coil is not arranged, and the bent portion is arranged on the upper side in the stator axial direction. A first cassette coil group configured by a cassette coil; and a second cassette coil group configured by a plurality of cassette coils in which the bent portion is disposed on the lower side in the stator axial direction. The cassette coils constituting the cassette coil group and the cassette coils constituting the second cassette coil group are alternately arranged so as to enter into the turns of each other's cassette coil.
As a result, the coil itself can be concentrated and the structure can be distributed.

  Thereby, the stator which ensured the desired performance at low cost can be provided.

1 is a diagram illustrating an outline of a stator according to a first embodiment; It is a figure of the cassette coil concerning Embodiment 1. FIG. FIG. 3 is a diagram showing a state in which a first cassette coil group is arranged on the stator core according to the first embodiment. It is the figure which showed the state which has arrange | positioned the 1st cassette coil group and the 2nd cassette coil group to the stator core concerning Embodiment 1. FIG. FIG. 3 is a top view and a circumferential sectional view of the stator core according to the first embodiment. FIG. 3 is an axial cross-sectional view of the stator core according to the first embodiment. It is the figure which showed the state which changed the connection concerning Embodiment 1 and changed the stator structure. FIG. 6 is a diagram showing a third cassette coil according to the second exemplary embodiment. FIG. 6 is a top view and a circumferential sectional view of a stator core according to a second embodiment. FIG. 6 is an axial sectional view of a stator core according to a second embodiment. FIG. 10 is a diagram illustrating a third cassette coil according to the third embodiment. FIG. 6 is a top view and a circumferential sectional view of a stator core according to a third embodiment. FIG. 6 is an axial sectional view of a stator core according to a third embodiment.

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the stator 1 includes a plurality of teeth 21, a stator core 11 having a plurality of slots 22 around which coils are wound, and a cassette coil assembled and connected to the stator core 11. 12. For example, the stator 1 is used to configure a three-phase motor having a U phase, a V phase, and a W phase.

  As shown in FIGS. 2A and 2B, the cassette coil 12 is a cassette coil in which a rectangular coil is wound in a single phase or multiple layers. As the cassette coil 12, two types of a first cassette coil 31 and a second cassette coil 32 are used. For example, the cassette coil 12 is formed in a coil shape by winding a rectangular wire as a coil, and a part of the coil is bent in the stacking direction. This bending will be described in detail later. When the cassette coil 12 is assembled to the stator core 11, the radial direction of the stator core 11 is arranged so as to substantially coincide with the stacking direction of the cassette coil 12.

  The first cassette coil 31 has a substantially rectangular shape when viewed from the front. When the first cassette coil 31 is disposed so that the axis of the annular stator core 11 extends in the vertical direction, the winding end 31a for connecting the layers is disposed below.

  In the first cassette coil 31, the first and second straight portions 31b and 31c form a long side of a rectangular cross section, and the third and fourth straight portions 31d and 31e form a short-side coil end. doing. 3, when the 1st cassette coil 31 is assembled | attached to the stator core 11, it demonstrates that the 3rd linear part 31d is arrange | positioned above and the 4th linear part 31e is arrange | positioned below. In addition, when viewed from the center of the stator core 11, the first straight portion 31b is disposed as the left long side, and the second straight portion 31c is disposed as the right long side.

  Further, since the first and second straight portions 31b and 31c are bent in the stacking direction, the third straight portion 31d and a part of the first and second straight portions 31b and 31c in the vicinity thereof are formed. A bent portion 31f is formed. In other words, in the first cassette coil 31, the bent portion 31f is formed at the coil end in the direction in which the winding end portion 31a is not formed. In addition, the bending direction of the 1st and 2nd linear parts 31b and 31c is the same direction. As shown in FIG. 3, when the first cassette coil 31 is assembled to the stator core 11, the bent portion 31 f including the third straight portion 31 d is disposed on the upper side in the axial direction of the stator core 11. At this time, the bent portion 31 f is disposed so as to be bent in the outer circumferential direction of the stator core 11.

  The plurality of first cassette coils 31 are arranged continuously along the annular shape of the stator core 11 to form a first cassette coil group 41. Specifically, the state where the second straight line portion 31c of another first cassette coil 31 is arranged adjacent to the first straight line portion 31b of one first cassette coil 31 continues. A plurality of first cassette coils 31 are continuously arranged.

  As shown in FIG. 2B, the second cassette coil 32 has a substantially rectangular shape when viewed from the front. When the second cassette coil 32 is arranged so that the axis of the annular stator core 11 extends in the vertical direction, the winding end 32a for connecting the layers is arranged above.

  In the second cassette coil 32, the first and second straight portions 32b and 32c form a long side of a rectangular cross section, and the third and fourth straight portions 32d and 32e form a short-side coil end. doing. In addition, when the 2nd cassette coil 32 is assembled | attached to the stator core 11, it demonstrates that the 3rd linear part 32d is arrange | positioned upwards and the 4th linear part 32e is arrange | positioned below. Further, when viewed from the center of the stator core 11, the first straight portion 32b is arranged as the left long side, and the second straight portion 32c is arranged as the right long side.

  Since the first and second straight portions 32b and 32c are bent in the stacking direction, the fourth straight portion 32e and a part of the first and second straight portions 32b and 32c in the vicinity thereof are bent. A portion 32f is formed. In other words, in the second cassette coil 32, a bent portion 32f is formed at a coil end in a direction where the winding end portion 32a is not formed. In addition, the bending direction of the 1st and 2nd linear parts 32b and 32c is the same direction. As a result, as shown in FIG. 4, when the second cassette coil 32 is assembled to the stator core 11, the bent portion 32 f including the fourth straight portion 32 e is disposed on the lower side in the axial direction of the stator core 11. At this time, the bent portion 32f is arranged to bend in the inner peripheral direction of the stator core 11.

  The plurality of second cassette coils 32 are continuously arranged along the ring of the stator core 11 to form a second cassette coil group 42. In other words, adjacent to the first straight line portion 32b of one second cassette coil 32, a plurality of the second straight line portions 31c of another second cassette coil 32 are continuously arranged. The second cassette coil is continuously arranged. The first cassette coil group 41 is arranged on the outer peripheral side with respect to the second cassette coil group 42.

  For example, as shown in FIGS. 5A and 6, the first straight portion 31b, which is the long side of the first cassette coil 31A, is in the turn of the second cassette coil 32A, that is, the second cassette coil. The first linear portion 31b and the second linear portion 31c of 32A are disposed so as to enter. Similarly, the second linear portion 31b of the first cassette coil 31A is disposed in the turn of another second cassette coil 32B disposed adjacent to the second cassette coil 32A, that is, adjacent to the second cassette coil 32A. The second straight line portion 31b and the second straight line portion 31c of the other second cassette coil 32B are arranged so as to enter.

  Similarly, the first straight portion 32b of the second cassette coil 32B is disposed so as to enter the turn of the first cassette coil 31A, and the second straight portion 32c of the second cassette coil 32B is It arrange | positions so that it may enter in the turn of the 1st cassette coil 31B arrange | positioned adjacent to the 1st cassette coil 31A.

  At this time, as shown in FIG. 5B, since the first cassette coil 31 is provided with a bent portion 31f, the third linear portion 31d of the first cassette coil 31 and the second cassette The third straight portion 32d of the coil 32 is disposed without interference.

  Here, as shown in FIG. 6, for example, the first straight line portion 31b of the first cassette coil 31B and the second straight line portion 31c of the first cassette coil 31A are arranged adjacent to each other, and the teeth are interposed between them. 21 may or may not be arranged. Similarly, the first straight portion 31b of the second cassette coil 32B and the first straight portion 31b of the second cassette coil 32A are disposed adjacent to each other, and the teeth 21 may be disposed therebetween. It is not necessary to arrange. The same applies to other locations.

  For example, the teeth 21 are disposed between the first straight portion 31b of the first cassette coil 31A and the second straight portion 32c of the second cassette coil 32A. Similarly, the teeth 21 are disposed between the second straight portion 31c of the first cassette coil 31A and the first straight portion 32b of the second cassette coil 32B. The same applies to other locations.

  In other words, in the first cassette coil 31 and the second cassette coil 32, the teeth 21 are arranged between the portions where the linear portions 31b, 31c, 32b, and 32c of different cassette coils are adjacent to each other.

  In the above description, as illustrated in FIG. 7A, the stator 1 is described as being used for a three-phase AC motor. However, as illustrated in FIG. 7B, the connection location between the cassette coils is changed. Thus, it can be changed to a stator structure or the like of a winding field type motor, and can be used as any stator.

  Thereby, the coil itself can be concentrated and a stator core having a distributed winding structure can be formed.

Embodiment 2
Next, the stator 2 in which the first cassette coil 31 and the third cassette coil 33 are assembled to the stator core 11 will be described. In addition, about the component similar to the component of the stator 1 shown in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 8, the third cassette coil 33 is a cassette coil in which a rectangular coil is wound in a single phase or multiple layers. The third cassette coil 33 has a substantially rectangular shape when viewed from the front. When the third cassette coil 33 is arranged so that the axis of the annular stator core 11 extends in the vertical direction, the winding end 33a for connecting the layers is arranged above.

  In the third cassette coil 33, the first and second straight portions 33b and 33c form a long side of a rectangular cross section, and the third and fourth straight portions 33d and 33e form a short side coil end. Yes. In addition, when the 3rd cassette coil 33 is assembled | attached to the stator core 11, it demonstrates that the 3rd linear part 33d is arrange | positioned upwards and the 4th linear part 33e is arrange | positioned below. Further, when viewed from the center of the stator core 11, the first straight portion 33b is disposed as the left long side, and the second straight portion 33c is disposed as the right long side.

  Here, because the first and second straight portions 33b and 33c are bent in the stacking direction, the fourth straight portion 33e and a part of the first and second straight portions 33b and 33c in the vicinity thereof. In addition, a bent portion 33f is formed. In other words, in the third cassette coil 33, the bent portion 33f is formed at the coil end in the direction where the winding end portion 33a is not formed. In addition, the bending direction of the 1st and 2nd linear parts 33b and 33c is the same direction. Thus, when the third cassette coil 33 is assembled to the stator core 11, the bent portion 33 f including the fourth straight portion 33 e is disposed on the lower side in the axial direction of the stator core 11. At this time, the bent portion 33f is arranged to bend in the outer circumferential direction of the stator core 11.

  As shown in FIG. 9A, the plurality of first cassette coils 31 are arranged continuously along the annular ring of the stator core 11 to form a first cassette coil group 51. The plurality of third cassette coils 33 are continuously arranged along the ring of the stator core 11 to form a second cassette coil group 52. The first cassette coil group 51 is arranged on the outer peripheral side with respect to the second cassette coil group 52.

  For example, as shown in FIG. 10, the first straight portion 33b of the third cassette coil 33B is disposed so as to enter the turn of the first cassette coil 31A, and the second straight line of the third cassette coil 33B. The portion 33c is arranged so as to enter the turn of another first cassette coil 31B adjacent to the first cassette coil 31A.

  Similarly, the first linear portion 31b of the first cassette coil 31B is disposed so as to enter the turn of the third cassette coil 33A, and the second linear portion 31c of the first cassette coil 31B is It arrange | positions so that it may enter in the turn of another 3rd cassette coil 33B adjacent to the 3rd cassette coil 33A. The same applies to other locations.

  At this time, as shown in FIG. 9B, the bent portion 31f is formed in the first cassette coil 31, so that the third linear portion 31d of the first cassette coil 31 is formed above the stator core 11. And the 3rd linear part 33d of the 3rd cassette coil 33 does not interfere. Similarly, the bent portion 33 f is formed in the third cassette coil 33, so that the fourth linear portion 31 e of the first cassette coil 31 and the third cassette coil 33 are formed below the stator core 11. The fourth straight line portion 33e can be disposed without interference.

  In this way, the first cassette coil 31 used for the first cassette coil group 51 and the third cassette coil 33 used for the second cassette coil group 52 have bent portions 31f and 33f in the outer circumferential direction, respectively. The stator core 11 can be assembled in a state of being arranged in a bent state. Therefore, the coil itself can be concentrated and a stator having a distributed winding structure can be formed.

Embodiment 3
Next, the stator 3 in which the first cassette coil 31, the second cassette coil 32, and the fourth cassette coil 34 are assembled to the stator core 11 will be described. In addition, about the component similar to the component of the stator 1 shown in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 11, the fourth cassette coil 34 is a cassette coil in which a rectangular coil is wound in a single phase or multiple layers. The fourth cassette coil 34 has a substantially rectangular shape when viewed from the front. When the fourth cassette coil 34 is arranged such that the axis of the annular stator core 11 extends in the vertical direction, the winding end 34a for connecting the layers is arranged above.

  In the fourth cassette coil 34, the first and second straight portions 34b and 34c form a long side of a rectangular cross section, and the third and fourth straight portions 34d and 34e form a short side coil end. Yes. In addition, when the 4th cassette coil 34 is assembled | attached to the stator core 11, it demonstrates that the 3rd linear part 34d is arrange | positioned upward and the 4th linear part 34e is arrange | positioned below. Further, when viewed from the center of the stator core 11, the first straight portion 34b is disposed as the left long side, and the second straight portion 34c is disposed as the right long side.

  The first and second straight portions 34b and 34c of the fourth cassette coil 34 are formed longer than the first and second straight portions 32b and 32c of the second cassette coil 32, respectively.

  In addition, since the first and second straight portions 34b and 34c are bent in the stacking direction, the fourth straight portion 34e and a part of the first and second straight portions 34b and 34c in the vicinity thereof are formed. A bent portion 34f is formed. In other words, in the fourth cassette coil 34, a bent portion 34f is formed at a coil end in a direction where the winding end portion 34a is not formed. In addition, the bending direction of the 1st and 2nd linear parts 34b and 34c is the same direction. Thus, when the fourth cassette coil 34 is assembled to the stator core 11, the bent portion 34 f including the fourth straight portion 34 e is disposed on the lower side in the axial direction of the stator core 11. At this time, the bent portion 34f is arranged to bend in the inner peripheral direction of the stator core 11.

  As shown in FIG. 12A, the plurality of first cassette coils 31 are arranged continuously along the annular ring of the stator core 11 to form a first cassette coil group 61. The plurality of second cassette coils 32 and the plurality of fourth cassette coils 34 are alternately arranged along the ring of the stator core 11 to form the second cassette coil group 62. The first cassette coil group 61 is arranged on the outer peripheral side with respect to the second cassette coil group 62.

  For example, as shown in FIG. 13, the first linear portion 31b of the first cassette coil 31A is disposed so as to enter the turn of the second cassette coil 32A, and the second linear portion 31b of the first cassette coil 31A The straight line portion 31c is disposed so as to enter the turn of the fourth cassette coil 34A. Further, the first linear portion 31b of the first cassette coil 31B is arranged so as to enter the turn of the fourth cassette coil 34A, and the second linear portion 31c of the first cassette coil 31B is the second It arrange | positions so that it may enter in the turn of cassette coil 32A.

  Similarly, the second straight line portion 32c of the second cassette coil 32A and the first straight line portion 34b of the fourth cassette coil 34A are arranged so as to enter the turn of the first cassette coil 31A. ing. The second straight portion 32c of the fourth cassette coil 34A and the first straight portion 34b of the second cassette coil 32B are arranged so as to enter the turn of the first cassette coil 31B. The same applies to other locations.

  Here, the second cassette coil 32 and the fourth cassette coil 34 forming the second cassette coil group 62 have bent portions 32 f and 34 f that bend in the inner peripheral direction of the stator core 11, respectively. . Since the first and second straight portions 34b, 34c of the fourth cassette coil 34 are formed longer than the first and second straight portions 32b, 32c of the second cassette coil 32, the stator core 11 The bent portions 32f and 34f bent in the inner circumferential direction are arranged in a state shifted in the vertical direction so as not to interfere with each other.

  As illustrated in FIG. 12B, the bent portion 31 f is formed in the first cassette coil 31, so that the first cassette coil 31 has an upper side with respect to the third linear portion 31 d of the first cassette coil 31. The third straight portion 32d of the second cassette coil 32 and the third straight portion 34d of the fourth cassette coil do not interfere with each other. Similarly, the bent portion 32f is formed in the second cassette coil 32, and the bent portion 34f is formed in the fourth cassette coil 34, so that the first cassette coil 31 is formed below the stator core 11. The fourth straight portion 32e of the second cassette coil 32 and the fourth straight portion 34e of the fourth cassette coil 34 can be arranged in a state where they do not interfere with the fourth straight portion 31e.

  Therefore, the first cassette coil group in which the coil end disposed above the stator core 11 is bent and the second cassette coil group in which the coil end disposed below the stator core 11 is bent are combined into the stator core 11. When assembling, the coil wires can be arranged in a state avoiding interference of the coil wires.

  Thereby, the coil itself can be concentrated and a stator core having a distributed winding structure can be formed. Since the cassette coil is used, the manufacturing process can be simplified and the cost can be reduced as compared with a distributed winding structure such as a conventional inserter system or segment coil system. Therefore, it is possible to provide a stator that secures desired performance at low cost.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Stator 2 Stator 3 Stator 11 Stator core 12 Cassette coil 21 Teeth 22 Slot 31 1st cassette coil 31a Winding end part 31b 1st linear part 31c 2nd linear part 31d 3rd linear part 31e 4th linear part 31f Bent portion 32 Second cassette coil 32a Winding end portion 32b First straight portion 32c Second straight portion 32d Third straight portion 32e Fourth straight portion 32f Bending portion 33 Third cassette coil 33a Winding End portion 33b First straight portion 33c Second straight portion 33d Third straight portion 33e Fourth straight portion 33f Bending portion 34 Fourth cassette coil 34a Winding end portion 34b First straight portion 34c Second Linear portion 34d Third linear portion 34e Fourth linear portion 34f Bending portion 41 First cassette coil group 42 Second cassette coil group 51 First cassette coil group 62 1 of the cassette coil group 52 a second cassette coil group 61 a second cassette coil group

Claims (1)

A bent portion is formed at a coil end in a direction where a winding end portion connecting the layers of the cassette coil is not arranged, and the bent portion is constituted by a plurality of cassette coils arranged on the upper side in the stator axial direction. One cassette coil group;
A second cassette coil group composed of a plurality of cassette coils arranged on the lower side in the stator axial direction of the bent portion,
The cassette coil which comprises the said 1st cassette coil group, and the cassette coil which comprises the said 2nd cassette coil group are alternately arrange | positioned so that it may enter in the turn of a mutual cassette coil.

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