CN113939974A

CN113939974A - Armature

Info

Publication number: CN113939974A
Application number: CN202180003896.7A
Authority: CN
Inventors: 竹本雅昭
Original assignee: Toyota Boshoku Corp
Current assignee: Toyota Boshoku Corp
Priority date: 2020-01-28
Filing date: 2021-01-26
Publication date: 2022-01-14
Anticipated expiration: 2041-01-26
Also published as: JPWO2021153552A1; WO2021153552A1; CN113939974B; JP7184215B2

Abstract

The tank (23) comprises: a 1 st slot (23A) in which only a 1 st winding constituting 1 of the 3 phases is arranged; and a 2 nd slot (23B) which is provided adjacent to the 1 st slot (23A) in the circumferential direction and in which the 1 st winding and a 2 nd winding constituting a phase different from the phase constituted by the 1 st winding among the 3 phases are arranged. In the 1 st slot (23A), the receiving portions (51, 62, 72, 81) of the 1 st winding are arranged in a row in the radial direction. In the 2 nd slot (23B), the receiving portions (52, 61, 71, 82) of the 1 st winding and the receiving portions (52, 61, 71, 82) of the 2 nd winding are alternately arranged in a row in the radial direction. In the 1 st slot (23A) and the 2 nd slot (23B), the 1 st coil end portions (53, 63, 73, 83) adjacent in the radial direction are drawn out in the circumferential direction in the opposite directions to each other.

Description

Armature

Technical Field

The present invention relates to an armature.

Background

An armature of a rotating electrical machine includes a stator core and a coil wound around the stator core (see, for example, patent document 1). The coil described in patent document 1 is wound around a stator core in a short-pitch winding manner. In the short-pitch winding, the winding is performed such that the coil pitch is shorter than the magnetic pole pitch, and therefore, the circumferential length of the coil can be made shorter than in the full-pitch winding in which the winding is performed such that the coil pitch and the magnetic pole pitch are equal to each other.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2007 & 228708

Disclosure of Invention

Problems to be solved by the invention

However, also in the short-pitch winding, the longer the circumference of the coil, the more the resistance of the coil increases. Therefore, it is desirable to make the circumference of the coil in the short-pitch winding shorter.

The invention aims to provide an armature capable of shortening the circumference of a coil in short-distance winding.

Means for solving the problems

An armature for achieving the above object, comprising a core having a plurality of slots formed therein at intervals in a circumferential direction, and a coil in which a winding of 3 phases including U-phase, V-phase, and W-phase is wound around the core in a short pitch winding manner, the winding having a housing portion housed in the slot and a coil end portion disposed outside the slot, wherein the slot includes: a 1 st slot in which only a 1 st winding constituting 1 of the 3 phases is arranged; and a 2 nd slot that is provided adjacent to the 1 st slot in the circumferential direction and in which the 1 st winding and a 2 nd winding that constitutes a phase different from a phase constituted by the 1 st winding among the 3 phases are arranged, the housing portions of the 1 st winding being arranged in a row in a radial direction of the core in the 1 st slot, the housing portions of the 1 st winding and the housing portions of the 2 nd winding being arranged alternately and in a row in the radial direction in the 2 nd slot, the coil ends adjacent in the radial direction being drawn out in the 1 st slot and the 2 nd slot in opposite directions to each other in the circumferential direction.

According to this configuration, since the coil ends adjacent in the radial direction are drawn out in the circumferential direction in the opposite directions to each other, a gap is formed between the coil ends drawn out in the same direction in the circumferential direction, and the other coil ends can be drawn through the gap. Therefore, an increase in the circumference of the coil due to interference between the coil ends can be suppressed, and the circumference of the coil during short-distance winding can be made shorter.

Drawings

Fig. 1 is a perspective view of a stator according to embodiment 1.

Fig. 2 is an enlarged perspective view showing a part of the stator in an enlarged manner.

Fig. 3 is a schematic diagram showing a segment coil penetrating a stator core.

Fig. 4 is a perspective view showing a U-phase winding of the coil.

Fig. 5 is a perspective view of the unit winding of the U-phase winding viewed from the radially inner side.

Fig. 6 is a perspective view of the unit winding of the U-phase winding viewed from the outside in the radial direction.

Fig. 7 is a schematic diagram showing the arrangement of U-phase windings in the slots.

Fig. 8 is a schematic diagram showing the arrangement of the V-phase winding in the slot.

Fig. 9 is a schematic diagram showing the arrangement of the W-phase winding in the slot.

Fig. 10 is a schematic diagram showing the arrangement of the U-phase winding, the V-phase winding, and the W-phase winding in the slots.

Fig. 11 is an enlarged perspective view showing a part of the stator according to embodiment 2.

Fig. 12 is a perspective view showing a U-phase coil of the coil.

Fig. 13 is a perspective view showing a W-phase coil of the coil.

Detailed Description

[ embodiment 1 ]

Hereinafter, embodiment 1 in which the armature is embodied as a stator will be described with reference to fig. 1 to 10.

As shown in fig. 1, stator 10 includes annular stator core 20 and coil 30 wound around stator core 20. The stator 10 of the present embodiment is used for a three-phase synchronous rotating electrical machine. The stator core 20 is an example of a core.

Hereinafter, the axial direction of the stator core 20 is simply referred to as the axial direction, the circumferential direction of the stator core 20 about the axial line of the stator core 20 is simply referred to as the circumferential direction, and the radial direction of the stator core 20 about the axial line is simply referred to as the radial direction. In fig. 1, the upper side is referred to as the 1 st side in the axial direction, and the lower side is referred to as the 2 nd side in the axial direction. In fig. 1, the clockwise side is referred to as the 1 st side in the circumferential direction, and the counterclockwise side is referred to as the 2 nd side in the circumferential direction.

< stator core 20 >

As shown in fig. 1, the stator core 20 includes an annular yoke 21 and a plurality of teeth 22 extending radially inward from the yoke 21 and formed at intervals in the circumferential direction. The stator core 20 is formed by laminating a plurality of steel plates, not shown.

Between the teeth 22 adjacent to each other in the circumferential direction, a groove 23 that opens to the inside in the radial direction and extends in the radial direction is formed. As described above, since the plurality of teeth 22 are provided in the circumferential direction, the plurality of slots 23 formed between the plurality of teeth 22 are also formed at intervals in the circumferential direction. In the stator 10 of the present embodiment, the number of phases is 3, the number of magnetic poles is 8, and the number of slots 23 is 48.

A plurality of mounting portions 24 are provided on the outer peripheral surface of the stator core 20, and the plurality of mounting portions 24 are used to fix the stator core 20 to a housing of a rotating electric machine, not shown. The mounting portions 24 project radially outward from the outer peripheral surface of the stator core 20 and are provided at intervals in the circumferential direction. The stator core 20 of the present embodiment is provided with 3 mounting portions 24. Each mounting portion 24 is formed with a through hole 24a penetrating in the axial direction. The stator core 20 and the housing are fixed by bolts, not shown, that pass through the through holes 24 a.

< coil 30 >

As shown in fig. 1, the coil 30 of the present embodiment is formed of, for example, a flat wire made of a metal material such as a copper alloy or an aluminum alloy. The outer peripheral surface of the flat wire is covered with an insulating coating film not shown.

The cross-sectional shape of the flat wire is a substantially rectangular shape having a long side and a short side. The long side has a length substantially equal to the width of the groove 23 extending in the direction orthogonal to both the axial direction and the radial direction. The coil 30 is wound around the stator core 20 such that the long side of the flat wire extends along the width of the slot 23.

The coil 30 has a U-phase winding 30U, V phase winding 30V and a W-phase winding 30W constituting 3 phases of a three-phase alternating current, i.e., a U-phase, a V-phase, and a W-phase, respectively. In the present embodiment, the number of magnetic poles is 8, and the number of slots 23 is 48, so the magnetic pole pitch is 6 slots, but the

windings

30U, 30V, and 30W are wound around the stator core 20 so that the coil pitch is 5 slots. That is, each of the

windings

30U, 30V, and 30W is wound around the stator core 20 so as to be wound at a short pitch, in which the coil pitch is shorter than the magnetic pole pitch.

In the coil 30 of the present embodiment, the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are wound around the stator core 20 in a state shifted by two slots in order from the 1 st side toward the 2 nd side in the circumferential direction. In the coil 30, at least one of the

windings

30U, 30V, and 30W is housed in the slot 23, thereby forming 8 layers arranged in 1 row in the radial direction in the slot 23.

Hereinafter, for convenience, the 8 layers are described as a 1 st layer L1, a 2 nd layer L2, a 3 rd layer L3, a 4 th layer L4, a 5 th layer L5, a 6 th layer L6, a 7 th layer L7, and an 8 th layer L8 in this order from the outer side in the radial direction.

Note that, the grooves 23 may be described in a different manner by assigning the groove numbers "S1" to "S48" to the grooves 23, for example, the grooves 23S 1.

As shown in fig. 2, U-phase supply unit 31U, V phase supply unit 31V and W-phase supply unit 31W to which electric power is supplied by being connected to a three-phase ac power supply not shown are provided at the 1 st end portions of U-phase winding 30U, V phase winding 30V and W-phase winding 30W, respectively. The

supply portions

31U, 31V, and 31W project from the groove 23 to the 1 st side in the axial direction and extend outward in the radial direction, and the tip ends thereof are bent to the 1 st side in the axial direction.

A pair of

neutral wires

32, 33 having a substantially U-letter shape are connected to the 2 nd end portion on the opposite side of the 1 st end portion in the U-phase winding 30U, V phase winding 30V and W-phase winding 30W. Each of the

neutral wires

32 and 33 is formed of a flat wire of the same type as the coil 30. The outer peripheral surfaces of the

neutral wires

32 and 33 are covered with an insulating coating. At both end portions of each

neutral wire

32, 33, the above-described insulating coating is removed, thereby exposing the flat wire.

The neutral wire 32 electrically connects the 2 nd end of the U-phase winding 30U and the 2 nd end of the V-phase winding 30V. In addition, the neutral wire 33 electrically connects the 2 nd end of the V-phase winding 30V and the 2 nd end of the W-phase winding 30W. That is, at the 2 nd end portion of the V-phase winding 30V, one end of the neutral wire 32 and one end of the neutral wire 33 are electrically connected. Therefore, the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are connected by the star connection.

(U phase winding 30U)

Next, the structure of each of the

coils

30U, 30V, and 30W will be explained. Since the

windings

30U, 30V, and 30W have the same shape, the structure of the U-phase winding 30U will be described below, and the structure of the V-phase winding 30V and the structure of the W-phase winding 30W will not be described.

As shown in fig. 3, the U-phase winding 30U is constituted by a plurality of segment coils 100 in a substantially letter U-shape. The segment coil 100 has a pair of through portions 101 that pass through the slots 23. The penetrating portions 101 extend in parallel.

The segment coil 100 includes a pair of 1 st continuous portions 102 connected to the 1 st end of the through

portions

101, and 2 nd continuous portions 103 connected to the 2 nd end of each through portion 101. At the tip of each 1 st continuous portion 102, the above-described insulating coating is removed, thereby exposing the flat wire.

When forming the U-phase winding 30U, first, each penetration portion 101 of the segment coil 100 is axially penetrated through the two slots 23. Next, the 1 st continuous portions 102 projecting from the slots 23 are bent and joined to the 1 st continuous portions 102 of the other segment coils 100 by welding or the like. At this time, at each 1 st continuous portion 102, the exposed portions of the flat wire are joined to each other. After that, the joint portion is subjected to an insulation treatment. In the present embodiment, the U-phase winding 30U is configured by using a plurality of types of segment coils 100 having different shapes of the 1 st continuous portion 102 and the 2 nd continuous portion 103.

As shown in fig. 4, the U-phase winding 30U is configured by joining 4

unit windings

40A, 40B, 40C, and 40D arranged at 90-degree intervals in the circumferential direction to each other. The

unit windings

40A, 40B, 40C, and 40D are arranged in this order from the 2 nd side toward the 1 st side in the circumferential direction. The

unit windings

40A, 40B, 40C, and 40D have the same configuration. Hereinafter, the structure of the unit winding 40A will be described, and the description of the structures of the

unit windings

40B, 40C, and 40D will be omitted in some cases.

(Unit winding 40A)

As shown in fig. 5 and 6, the unit winding 40A includes a 1 st lap portion 50, a 2 nd lap portion 60, a 3 rd lap portion 70, and a 4 th lap portion 80 that are each formed by being wound a plurality of times in two slots 23 separated by 5 slots. The

lap portions

50, 60, 70, 80 have the same structure. The number of times of lap winding of each

lap winding portion

50, 60, 70, 80 in the present embodiment is 4. In fig. 5 and 6, a part of the unit winding 40B and a part of the unit winding 40D are illustrated by two-dot chain lines.

The 2 nd lap 60 is provided in series with being shifted by 7 slots to the 1 st side in the circumferential direction with respect to the 1 st lap 50, the 3 rd lap 70 is provided in series with being shifted by 6 slots to the 2 nd side in the circumferential direction with respect to the 2 nd lap 60, and the 4 th lap 80 is provided in series with being shifted by 5 slots to the 1 st side in the circumferential direction with respect to the 3 rd lap 70. Therefore, in the unit winding 40A, the 1 st lap portion 50, the 3 rd lap portion 70, the 4 th lap portion 80, and the 2 nd lap portion 60 are provided in this order from the 2 nd side toward the 1 st side in the circumferential direction.

The following description will focus on the structure of the 1 st lap portion 50. Of the 2 nd, 3 rd, and 4 th folded

portions

60, 70, and 80, the structure corresponding to the 1 st folded portion 50 may be given the reference numerals "6", "7", and "8" obtained by adding "10", "20", and "30" to the reference numeral "5" indicating the structure of the 1 st folded portion 50, and overlapping description thereof may be omitted.

The 1 st lap portion 50 includes a plurality of 1 st accommodation portions 51 accommodated in the groove 23, and a plurality of 2 nd accommodation portions 52 accommodated in the groove 23 separated by 5 grooves from the 1 st side in the circumferential direction from the groove 23.

The 1 st receiving portions 51 extend in the axial direction and are provided at intervals in the radial direction. Similarly, the 2 nd receiving portions 52 extend in the axial direction and are provided at intervals from each other in the radial direction. The 1 st lap portion 50 of the present embodiment includes 4 of the 1 st housing portion 51 and the 2 nd housing portion 52.

Hereinafter, the 1 st side end of each of the

housing portions

51 and 52 in the axial direction is referred to as a 1 st end, and the 2 nd side end in the axial direction is referred to as a 2 nd end.

The 1 st lap portion 50 has a 1 st coil end portion 53 disposed outside the slot 23 on the 1 st side in the axial direction. The 1 st coil end 53 connects the 1 st end of the 1 st housing part 51 and the 1 st end of the 2 nd housing part 52. In the 1 st coil end 53, a portion protruding from the 1 st end of the 1 st housing portion 51 to the outside of the slot 23 is drawn toward the 1 st side in the circumferential direction, and a portion protruding from the 1 st end of the 2 nd housing portion 52 to the outside of the slot 23 is drawn toward the 2 nd side in the circumferential direction. The 1 st lap portion 50 of the present embodiment has 41 st coil end portions 53 provided at intervals in the radial direction.

The 1 st lap portion 50 has a 2 nd coil end 54 disposed outside the slot 23 on the 2 nd side in the axial direction. The 2 nd coil end 54 connects the 2 nd end of the 1 st housing part 51 and the 2 nd end of the 2 nd housing part 52. In the 2 nd coil end 54, a portion protruding from the 2 nd end of the 1 st housing portion 51 to the outside of the slot 23 is drawn toward the 1 st side in the circumferential direction, and a portion protruding from the 2 nd end of the 2 nd housing portion 52 to the outside of the slot 23 is drawn toward the 2 nd side in the circumferential direction. The 1 st lap portion 50 of the present embodiment has 32 nd coil end portions 54 provided at intervals in the radial direction. The number of the 2 nd coil end portions 54 in the 1 st lap portion 50 is 1 less than the number of the 1 st coil end portions 53. This is because any of the coupling portions 41 to 44 described later is connected to the 2 nd end of the 2 nd receiving portion 52 located at the outermost side or the innermost side in the radial direction.

The 1 st housing portion 51 and the 2 nd housing portion 52 are formed by the respective penetrating portions 101 of the segment coil 100 described above. The 1 st coil end portion 53 is configured by joining the 1 st continuous portion 102 of the segment coil 100 and the 1 st continuous portion 102 of the other segment coil 100. The 2 nd coil end 54 is constituted by the 2 nd continuous portion 103.

As shown in fig. 7, the 1

st receiving portions

51, 61, 71, and 81 of the

lap portions

50, 60, 70, and 80 form odd-numbered layers of the U-phase winding 30U, i.e., the 1 st layer L1, the 3 rd layer L3, the 5 th layer L5, and the 7 th layer L7, in the slot 23. The 2

nd receiving parts

52, 62, 72, 82 constitute even-numbered layers of the U-phase winding 30U, i.e., the 2 nd layer L2, the 4 th layer L4, the 6 th layer L6, and the 8 th layer L8.

In fig. 7 to 10, the black circles in the groove 23 indicate the case where the 1

st housing parts

51, 61, 71, and 81 are arranged, and the black squares indicate the case where the 2

nd housing parts

52, 62, 72, and 82 are arranged. Fig. 7 to 10 are schematic views showing the wiring of the coil 30 when the stator 10 is viewed from the 1 st side in the axial direction.

Hereinafter, the respective storage units may be described separately by designating the reference symbol "L" of each layer constituted by the storage unit at the end of the reference symbol "L" of each storage unit constituting each layer L1 to L8.

As shown in fig. 5 and 6, the unit winding 40A has a 1 st connecting portion 41 connecting the 1 st lap portion 50 and the 2 nd lap portion 60. The 1 st coupling part 41 couples the 2 nd end of the 2 nd accommodating part 52L8 of the 1 st lap wound part 50 and the 2 nd end of the 2 nd accommodating part 62L8 of the 2 nd lap wound part 60. That is, in the 1 st coupling part 41, the portion protruding outward from the 2 nd end of the 2 nd accommodating part 52L8 to the groove 23 is drawn out to the 1 st side in the circumferential direction, and the portion protruding outward from the 2 nd end of the 2 nd accommodating part 62L8 to the 2 nd side in the circumferential direction.

The unit winding 40A has a 2 nd connecting portion 42 connecting the 2 nd lap portion 60 and the 3 rd lap portion 70. The 2 nd coupling part 42 couples the 2 nd end of the 1 st accommodation part 61L1 of the 2 nd lap-wound part 60 and the 2 nd end of the 1 st accommodation part 71L1 of the 3 rd lap-wound part 70. That is, in the 2 nd coupling part 42, the portion protruding outward from the 2 nd end of the 1 st accommodation part 61L1 to the groove 23 is drawn out to the 2 nd side in the circumferential direction, and the portion protruding outward from the 2 nd end of the 1 st accommodation part 71L1 to the 1 st side in the circumferential direction.

The unit winding 40A has a 3 rd connecting portion 43 connecting the 3 rd lap portion 70 and the 4 th lap portion 80. The 3 rd coupling part 43 couples the 2 nd end of the 2 nd accommodating part 72L8 of the 3 rd lap wound part 70 and the 2 nd end of the 2 nd accommodating part 82L8 of the 4 th lap wound part 80. That is, in the 3 rd coupling part 43, the portion protruding outward from the 2 nd end of the 2 nd accommodating part 72L8 to the groove 23 is drawn out to the 1 st side in the circumferential direction, and the portion protruding outward from the 2 nd end of the 2 nd accommodating part 82L8 to the 2 nd side in the circumferential direction.

The unit winding 40A has a 4 th connection portion 44 that connects the 4 th lap portion 80 and the 1 st lap portion 50 of the unit winding 40B adjacent to the unit winding 40A on the 1 st side in the circumferential direction. The 4 th coupling part 44 couples the 2 nd end of the 1 st accommodation part 81L1 of the 4 th lap-wound part 80 and the 2 nd end of the 1 st accommodation part 51L1 of the 1 st lap-wound part 50 in the unit winding 40B. That is, in the 4 th coupling part 44, the portion of the 1 st accommodation part 81L1 protruding outward from the 2 nd end of the groove 23 is drawn to the 1 st side in the circumferential direction, and the portion of the unit winding 40B protruding outward from the 2 nd end of the 1 st accommodation part 51L1 is drawn to the 2 nd side in the circumferential direction.

As described above, the

unit windings

40A, 40B, 40C, and 40D are connected to each other by the 4 th connecting portion 44.

Next, the arrangement of the U-phase winding 30U in the slot 23 will be described.

As shown in fig. 7, in the slot 23S1, the 1 st accommodation portion 51 of the unit winding 40A and the 2 nd accommodation portion 62 of the unit winding 40D are alternately arranged in a row in the radial direction. Further, the 1 st coil end 53 connected to the 1 st accommodation portion 51 and the 1 st coil end 63 connected to the 2 nd accommodation portion 62 are drawn out in opposite directions to each other in the circumferential direction.

In the groove 23S2, the 1 st accommodation portion 71 of the unit winding 40A is disposed in the odd-numbered layer.

In the groove 23S6, the 2 nd receiving portion 52 of the unit winding 40A is arranged in the even-numbered layer.

In the slot 23S7, the 1 st accommodation portion 81 of the unit winding 40A and the 2 nd accommodation portion 72 of the unit winding 40A are alternately arranged in a row in the radial direction. Further, the 1 st coil end 83 connected to the 1 st accommodation portion 81 and the 1 st coil end 73 connected to the 2 nd accommodation portion 72 are drawn out in the circumferential direction in opposite directions to each other.

In the groove 23S8, the 1 st accommodation portion 61 of the unit winding 40A is arranged in the odd-numbered layer.

In the groove 23S12, the 2 nd receiving portion 82 of the unit winding 40A is disposed in the even-numbered layer.

In the slot 23S13, the 1 st accommodation portion 51 of the unit winding 40B and the 2 nd accommodation portion 62 of the unit winding 40A are alternately arranged in a row in the radial direction. Further, the 1 st coil end 53 connected to the 1 st accommodation portion 51 and the 1 st coil end 63 connected to the 2 nd accommodation portion 62 are drawn out in opposite directions to each other in the circumferential direction.

By repeating the structure from slot 23S1 to slot 23S13, U-phase winding 30U is wound around stator core 20. Therefore, in the slot 23S48, the 2 nd accommodation portion 82 of the unit winding 40D is disposed in the even-numbered layer.

As described above, in the stator 10 of the present embodiment, the slots 23 in which only the U-phase winding 30U is arranged are provided for every 6 slots, as in the slots 23S1, the slots 23S7, and the slots 23S 13.

As described above, in the present embodiment, V-phase winding 30V and W-phase winding 30W, each having the same configuration as that of U-phase winding 30U, are wound around stator core 20 while being shifted by two slots in order from the 1 st side toward the 2 nd side in the circumferential direction. That is, the V-phase winding 30V is disposed at a position shifted by two slots to the 2 nd side in the circumferential direction with respect to the U-phase winding 30U, and the W-phase winding 30W is disposed at a position shifted by two slots to the 2 nd side in the circumferential direction with respect to the V-phase winding 30V. Therefore, as shown in fig. 7 and 8, the groove 23S5 and the groove 23S11 located at positions shifted by two grooves toward the 2 nd side in the circumferential direction from the groove 23S7 and the groove 23S13 in which only the U-phase winding 30U is arranged become the groove 23 in which only the V-phase winding 30V is arranged. In this way, also in the V-phase winding 30V, the slots 23 in which only the V-phase winding 30V is arranged are provided every 6 slots. Similarly, as shown in fig. 7 and 9, the groove 23S3 and the groove 23S9 located at positions shifted by 4 grooves toward the 2 nd side in the circumferential direction from the groove 23S7 and the groove 23S13 in which only the U-phase winding 30U is arranged are the grooves 23 in which only the W-phase winding 30W is arranged. In this way, also in the W-phase winding 30W, the slots 23 in which only the W-phase winding 30W is arranged are provided every 6 slots. The slot 23 in which only the W-phase winding 30W is arranged (for example, the slot 23S3) is located at a position shifted by two slots to the 2 nd side in the circumferential direction with respect to the slot 23 in which only the V-phase winding 30V is arranged (for example, the slot 23S 5).

Hereinafter, the slot 23 in which only 1 of the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W is arranged is referred to as a 1 st slot 23A.

As shown in fig. 10, in the slots 23 between the 1 st slots 23A adjacent to each other in the circumferential direction, two windings arranged in these 1 st slots 23A, that is, two windings of the U-phase winding 30U, V-phase winding 30V and the W-phase winding 30W are alternately arranged. For example, in the slot 23S6, the 1 st housing section 61 of the V-phase winding 30V and the 2 nd housing section 52 of the U-phase winding 30U are arranged alternately and in a row in the radial direction, and in the slot 23S4, the 1 st housing section 61 of the W-phase winding 30W and the 2 nd housing section 52 of the V-phase winding 30V are arranged alternately and in a row in the radial direction.

Hereinafter, the slot 23 in which the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are alternately arranged and which is the slot 23 provided adjacent to the 1 st slot 23A is referred to as a 2 nd slot 23B. In fig. 10, illustration of the 2 nd

coil end portions

54, 64, 74, and 84 is omitted.

As described above, in the groove 23 of the present embodiment, the 1 st groove 23A and the 2 nd groove 23B are configured to be alternately arranged in the circumferential direction.

In the present embodiment, the U-phase winding 30U, V-phase winding 30V and the W-phase winding 30W disposed in the 1 st slot 23A correspond to the 1 st winding, respectively. A winding that is arranged in the 2 nd slot 23B provided adjacent to the 1 st slot 23A in the circumferential direction and that constitutes a phase different from the phase constituted by the 1 st winding corresponds to the 2 nd winding. For example, in the slot 23S7 constituting the 1 st slot 23A, the U-phase winding 30U corresponds to the 1 st winding. In the slot 23S6 constituting the 2 nd slot 23B, the V-phase winding 30V corresponds to the 2 nd winding, and similarly in the slot 23S8 constituting the 2 nd slot 23B, the W-phase winding 30W corresponds to the 2 nd winding.

The arrangement type of the 1 st winding in the 1 st slot 23A is one of the 1 st and 2

nd accommodation portions

51 and 62, and the 1 st and 2

nd accommodation portions

81 and 72.

The arrangement type of the 1 st winding and the 2 nd winding in the 2 nd slot 23B is such that any two of the 1 st accommodation portion 61, the 1 st accommodation portion 71, the 2 nd accommodation portion 52, and the 2 nd accommodation portion 82 are combined.

In the 1 st slot 23A, the 1 st coil ends 53, 63, 73, 83 of the 1 st winding adjacent in the radial direction are drawn out in the circumferential direction opposite to each other. In addition, in the 2 nd slot 23B, the 1

st coil end

53, 63, 73, 83 of the 1 st winding and the 1

st coil end

53, 63, 73, 83 of the 2 nd winding adjacent in the radial direction are drawn out in the opposite directions to each other in the circumferential direction. Therefore, in all the slots 23, the 1 st coil ends 53, 63, 73, 83 adjacent in the radial direction are drawn out in the circumferential direction opposite to each other.

The operation of the present embodiment will be described.

In the 1 st and 2

nd slots

23A and 23B, the 1 st coil ends 53, 63, 73, 83 adjacent in the radial direction are drawn out in the circumferential direction opposite to each other. Therefore, gaps are formed in the radial direction between the 1 st coil ends 53, 63, 73, 83 drawn out in the same circumferential direction, and the other 1 st coil ends 53, 63, 73, 83 can be wound via the gaps. As shown in fig. 10, for example, in the gap between the 1 st coil end 53 of the slot 23S1 to the slot 23S6 in the U-phase winding 30U, the 1 st coil end 73 of the U-phase winding 30U, the 1 st coil ends 53, 73, 83 of the V-phase winding 30V, and the 1 st coil ends 53, 63, 73, 83 of the W-phase winding 30W can be wound. In fig. 10, the region surrounded by the rectangle of the two-dot chain line shows the gap between the 1 st coil end portions 53, and the 1 st

coil end portions

53, 63, 73, 83 included in the region show the 1 st

coil end portions

53, 63, 73, 83 wound in the gap.

The effects of the present embodiment will be described.

(1) The groove 23 includes: a 1 st slot 23A in which only a 1 st winding constituting 1 of the 3 phases is arranged; and a 2 nd slot 23B that is provided adjacent to the 1 st slot 23A in the circumferential direction, and in which the 1 st winding and a 2 nd winding constituting a phase different from the phase constituted by the 1 st winding among the 3 phases are arranged. In the 1 st slot 23A, the

housing portions

51, 62, 72, 81 of the 1 st winding are arranged in a row in the radial direction. In the 2 nd slot 23B, the

housing portions

52, 61, 71, 82 of the 1 st winding and the

housing portions

52, 61, 71, 82 of the 2 nd winding are alternately arranged in a row in the radial direction. In the 1 st and 2

nd slots

23A and 23B, the 1 st coil ends 53, 63, 73, 83 adjacent in the radial direction are drawn out in the circumferential direction opposite to each other.

With this configuration, since the above-described operation is performed, it is possible to suppress an increase in the circumferential length of the coil 30 due to the interference between the 1 st coil ends 53, 63, 73, 83, and to shorten the circumferential length of the coil 30 in the short-pitch winding.

(2) The U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are flat wires.

With this configuration, the slot fill ratios of the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W can be improved as compared with the case where the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are formed of round wires.

(3) The U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are constituted by a plurality of segment coils 100, and the plurality of segment coils 100 have a penetration portion 101 penetrating the slot 23 to constitute the

respective housing portions

51, 52, 61, 62, 71, 72, 81, 82, a 1 st continuous portion 102 continuous with the penetration portion 101 and constituting the 1 st

coil end portions

53, 63, 73, 83, and a 2 nd continuous portion 103 constituting the 2 nd

coil end portions

54, 64, 74, 84.

According to such a configuration, the U-phase winding 30U, V-phase winding 30V and the W-phase winding 30W can be arranged in the slot 23 by passing the segment coil 100 through the slot 23, which contributes to improvement in ease of manufacturing the coil 30 having the above configuration.

[ 2 nd embodiment ]

Hereinafter, embodiment 2 in which the armature is embodied as a stator will be described mainly with reference to fig. 11 to 13, focusing on differences from embodiment 1.

Note that, with regard to the structure of the stator according to embodiment 2, the same reference numerals are given to the same structures as those of embodiment 1, and the structure corresponding to embodiment 1 is given reference numeral "1" obtained by adding "100" to the reference numeral "1" of embodiment 1, so that redundant description is omitted.

As shown in fig. 11, the stator 110 has a stator core 20 and a coil 130.

The coil 130 is formed of, for example, a flat wire made of a metal material such as a copper alloy or an aluminum alloy. The coil 130 has a U-phase winding 130U, V phase winding 130V and a W-phase winding 130W constituting 3 phases of a three-phase ac, i.e., a U-phase, a V-phase, and a W-phase, respectively. In the present embodiment, the number of magnetic poles is 8, and the number of slots 23 is 48, so the magnetic pole pitch is 6 slots, but the

windings

130U, 130V, and 130W are wound around the stator core 20 so that the coil pitch is 5 slots. That is, each of the

coils

130U, 130V, and 130W is wound around the stator core 20 in a short-pitch winding manner in which the coil pitch is shorter than the pole pitch.

In the coil 130 of the present embodiment, the U-phase winding 130U, W and the V-phase winding 130V are wound around the stator core 20 in a state shifted by two slots in order from the 1 st side toward the 2 nd side in the circumferential direction. In the coil 30 of embodiment 1, the U-phase winding 30U, V phase winding 30V and the W-phase winding 30W are wound around the stator core 20 in a state shifted by two slots in order from the 1 st side toward the 2 nd side in the circumferential direction. That is, the order of arrangement of the

windings

130U, 130V, and 130W in the present embodiment is different from the order of arrangement of the

windings

30U, 30V, and 30W in embodiment 1. Therefore, the arrangement of the W-phase winding 130W in the present embodiment is the same as the arrangement of the V-phase winding 30V in embodiment 1 shown in fig. 8. The arrangement of the V-phase winding 130V in the present embodiment is the same as the arrangement of the W-phase winding 30W in embodiment 1 shown in fig. 9.

U-phase supply unit 131U, V phase supply unit 131V and W-phase supply unit 131W to which electric power is supplied by being connected to a three-phase ac power supply not shown are provided at the 1 st end portions of U-phase winding 130U, V phase winding 130V and W-phase winding 130W, respectively. U-phase supply unit 131U, V phase supply unit 131V and W-phase supply unit 131W are provided in this order from the 1 st side toward the 2 nd side in the circumferential direction.

At the 2 nd end portion on the opposite side of the 1 st end portion of the U-phase winding 130V and the W-phase winding 130W, the U-phase winding 130U, V phase winding 130V and the W-phase winding 130W are provided a U-phase connecting portion 134V and a W-phase connecting portion 134W, respectively, which are connected to a pair of neutral wires 132, 133 having a substantially U-letter shape. U-phase connection 134U, V connection 134V and W connection 134W are provided in this order from the 1 st side toward the 2 nd side in the circumferential direction.

Each neutral wire 132, 133 is formed of a flat wire of the same kind as the coil 130. The outer peripheral surfaces of the neutral wires 132 and 133 are covered with an insulating coating. At both end portions of each neutral wire 132, 133, the above-described insulating coating is removed, thereby exposing the flat wire.

Neutral wire 132 electrically connects U-phase connection 134U and V-phase connection 134V. In addition, neutral line 133 electrically connects V-phase connection 134V and W-phase connection 134W. That is, at V-phase connection portion 134V, one end of neutral line 132 and one end of neutral line 133 are electrically connected. Therefore, the U-phase winding 130U, V phase winding 130V and the W-phase winding 130W are connected by the star connection.

(U phase winding 130U)

As shown in fig. 12, the U-phase winding 130U is configured by joining 4

unit windings

140A, 140B, 140C, and 140D arranged at 90-degree intervals in the circumferential direction to each other. The

unit windings

140A, 140B, 140C, and 140D are arranged in this order from the 2 nd side toward the 1 st side in the circumferential direction. The

unit windings

140A, 140B, 140C, and 140D have the same structure. Hereinafter, the structure of the unit winding 140A will be described, and the structure of each of the

unit windings

140B, 140C, and 140D will be omitted.

(Unit winding 140A)

The unit winding 140A includes the 1 st lap 50, the 2 nd lap 60, the 3 rd lap 70, and the 4 th lap 80.

The unit winding 140A includes a 1 st coupling part 141, a 2 nd coupling part 142, a 3 rd coupling part 143, and a 4 th coupling part 144. The 1 st coupling portion 141 couples the 1 st lap portion 50 and the 2 nd lap portion 60. The 2 nd coupling portion 142 couples the 2 nd lap portion 60 and the 3 rd lap portion 70. The 3 rd coupling portion 143 couples the 3 rd lap portion 70 and the 4 th lap portion 80. The 4 th coupling part 144 couples the 4 th lap portion 80 and the 1 st lap portion 50 of the unit winding 140B adjacent to the unit winding 140A on the 1 st side in the circumferential direction.

The shapes of the coupling parts 141 to 144 of the present embodiment are different from the shapes of the coupling parts 41 to 44 of embodiment 1. However, the combination of the

storage units

51, 52, 61, 62, 71, 72, 81, and 82 connected by the connection units 141 to 144 is the same as that of embodiment 1.

The U-phase supply portion 131U is formed of a portion protruding from the 1 st accommodation portion 61L1 in the unit winding 140C outward of the 1 st lateral groove 23 in the axial direction. The U-phase connection portion 134U is formed of a portion protruding outward from the 1 st lateral groove 23 in the axial direction from the 2 nd accommodation portion 62L2 in the unit winding 140C. That is, the U-phase connection portion 134U is formed by a part of the 1 st coil end 63.

The U-phase supply unit 31U according to embodiment 1 is configured by a portion protruding from the 1 st accommodation portion 81L1 in the unit winding 40C outward of the 1 st lateral groove 23 in the axial direction. The 2 nd end of the U-phase winding 30U to which the neutral wire 32 is connected according to embodiment 1 is formed by a portion that protrudes from the 1 st receiving portion 82L2 in the unit winding 40C outward in the axial direction of the 1 st lateral groove 23.

From the above, the positions of U-phase supply portion 131U and U-phase connection portion 134U in U-phase winding 130U of the present embodiment are different from the positions of U-phase supply portion 31U and the 2 nd end portion of U-phase winding 30U to which neutral wire 32 is connected in U-phase winding 30U of embodiment 1.

(V phase winding 130V)

The V-phase winding 130V of the present embodiment has the same shape as the U-phase winding 130U. Therefore, a detailed description of the structure of the V-phase winding 130V is omitted.

Further, the positions of the U-phase supply portion 131U and the U-phase connection portion 134U in the U-phase winding 130U are the same as the positions of the V-phase supply portion 131V and the V-phase connection portion 134V in the V-phase winding 130V.

(W-phase winding 130W)

As shown in fig. 13, in the W-phase winding 130W of the present embodiment, the positions of the W-phase supply portion 131W and the W-phase connection portion 134W in the W-phase winding 130W are different from the positions of the U-phase supply portion 131U and the U-phase connection portion 134U in the U-phase winding 130U. More specifically, the W-phase supply portion 131W is configured by a portion that protrudes outward from the 1 st side groove 23 in the axial direction from the 1 st accommodation portion 71L1 in the unit winding 140C. The W-phase connection portion 134W is formed by a portion protruding outward from the 1 st lateral groove 23 in the axial direction from the 2 nd accommodation portion 72L2 in the unit winding 140C. That is, the W-phase connection portion 134W is formed by a part of the 1 st coil end 73.

The effects of the present embodiment will be described.

According to the present embodiment, the same effects as those of embodiment 1 can be obtained.

< modification >

The above embodiments can be modified as follows. The above embodiments and the following modifications can be combined and implemented within a range not technically contradictory to each other.

The U-phase winding 30U, V phase winding 30V and the W-phase winding 30W can be configured not only by joining a plurality of segment coils 100 to each other, but also by winding a plurality of continuous windings around the teeth 22 at a predetermined coil pitch.

The long side of the flat wire of the present embodiment has substantially the same length as the width of the groove 23, but the long side of the flat wire may be larger than half the width of the groove 23, or may be smaller than the width of the groove 23. With this configuration, the

storage portions

51, 52, 61, 62, 71, 72, 81, and 82 can be arranged in a row in the radial direction in the groove 23. In addition, if the U-phase winding 30U, V and the W-phase winding 30W can be arranged in a row in the radial direction in the slot 23, for example, if the diameter is larger than half the width of the slot 23, the U-phase winding 30V and the W-phase winding 30W may be circular lines having a circular cross section or polygonal lines having a polygonal cross section.

In the present embodiment, the 1

st housing parts

51, 61, 71, and 81 constitute odd-numbered stages and the 2

nd housing parts

52, 62, 72, and 82 constitute even-numbered stages, but the 1

st housing parts

51, 61, 71, and 81 may constitute even-numbered stages and the 2

nd housing parts

52, 62, 72, and 82 may constitute odd-numbered stages.

The number of layers of the coil 30 can also be appropriately changed by changing the number of times of winding of each of the winding

portions

50, 60, 70, and 80.

In the present embodiment, the stator of the rotating electrical machine is exemplified as an example of the armature, but the same configuration can also be applied to the rotor of the rotating electrical machine.

Description of the reference numerals

10. 110, a stator (armature); 20. a stator core (iron core); 23. a groove; 23A, the 1 st groove; 23B, the 2 nd groove; 30. 130, a coil; a 30U, 130U, U phase winding; a 30V, 130V, V phase winding; a 30W, 130W, W phase winding; 51. 61, 71, 81, the 1 st housing part; 52. 62, 72, 82, 2 nd receiving part; 53. 63, 73, 83, 1 st coil end; 54. 64, 74, 84, 2 nd coil end; 100. a segment coil; 101. a penetration portion; 102. a 1 st continuous portion; 103. the 2 nd continuous portion.

Claims

1. An armature having a core in which a plurality of slots are formed at intervals in a circumferential direction, and a coil in which a winding for forming 3 phases of U-phase, V-phase, and W-phase is wound around the core so as to be wound at short pitches, the winding having a housing portion housed in the slot and a coil end portion disposed outside the slot, wherein the armature is configured such that the winding is wound around the core at a pitch equal to or greater than a pitch of the winding,

the tank includes: a 1 st slot in which only a 1 st winding constituting 1 of the 3 phases is arranged; and a 2 nd slot that is provided adjacent to the 1 st slot in the circumferential direction and that is configured with the 1 st winding and a 2 nd winding that constitutes a phase different from a phase constituted by the 1 st winding among the 3 phases,

in the 1 st slot, the receiving portions of the 1 st winding are arranged in a row in a radial direction of the core,

in the 2 nd slot, the housing portions of the 1 st winding and the 2 nd winding are alternately arranged in a row in the radial direction,

in the 1 st slot and the 2 nd slot, the coil ends adjacent in the radial direction are drawn out in the circumferential direction in opposite directions to each other.

2. The armature of claim 1,

the winding is a flat wire.

3. The armature of claim 1 or 2,

the winding is formed of a plurality of segment coils each having a penetrating portion penetrating the slot to form the housing portion, and a continuous portion connected to the penetrating portion and forming the coil end portion.