JP2018164356A - Stator and electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concentrated winding stator capable of increasing the number of turns.SOLUTION: A phase-to-phase insulation member 50 has a first edge on one side in a circumferential direction and a second edge on the other side in a circumferential direction, and is bent in a V-shape. The phase-to-phase insulation member 50 is compressed to be inserted into a slot 25 from an inner peripheral side in a radial direction through a slot opening. After passing through the slot opening, the first edge and the second edge are inserted, by elastic return force, into one and the other of a first gap S1 and a second gap S2, the first and second gaps being defined by an inner wall part outer peripheral surface 122 of an inner wall part 120 of a first edge insulation member 100 disposed on one side in an axial direction of a stator core, an inner wall part outer peripheral surface of an inner wall part of a second edge insulation member 200 disposed on the other side in an axial direction of the stator core, a first tooth tip part outer peripheral surface at a tooth tip part, and a second tooth tip part outer peripheral surface at the tooth tip part. The first edge insulation member 100 and the second edge insulation member 200 have not a phase-to-phase insulation member guide passage.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a stator and an electric motor in which a stator winding is wound by a concentrated winding method.

  As a drive motor (for example, an air conditioner drive motor, a vehicle drive motor, and an in-vehicle device drive motor) that drives an apparatus, the stator winding is called a “concentrated winding stator” in which the stator winding is wound in a concentrated winding method. ) (Referred to as “concentrated winding motor”). The concentrated winding stator includes a stator core, an end insulating member (referred to as a “resin bobbin”), a stator winding, and an interphase insulating member. The stator winding is wound in a state where end insulating members are arranged on both sides in the axial direction of the stator core. The interphase insulating member is disposed between adjacent adjacent stator windings inserted in the slots.

Such a concentrated winding electric motor is disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-55098. 12 and 13 show a schematic configuration of a stator (concentrated winding stator) 10 constituting the concentrated winding electric motor disclosed in Patent Document 1. FIG. 12 is a perspective view of the stator 10, and FIG. 13 is a cross-sectional view of FIG. 12 as viewed from the arrow XIII-XIII line.
The stator 10 includes a stator core 20, a first end insulating member 300, a second end insulating member 400, a stator winding 40, and an interphase insulating member 50. The stator core 20 has a yoke 21, a tooth 22 formed by a tooth base 23 and a tooth tip 24, and a slot 25 formed by a tooth 22 adjacent in the circumferential direction. The first end insulating member 300 includes an outer wall portion 310, an inner wall portion 320, and a connecting portion 330. Although not shown, the second end insulating member 400 also has an outer wall portion 410, an inner wall portion 420, and a connecting portion 430, similar to the first end insulating member 300. The stator winding 40 is wound in a state in which the first end insulating member 300 and the second end insulating member 400 are disposed on both axial sides of the stator core 20. Further, in the slot 25 of the stator core 20, an interphase insulating member 50 bent in a V shape is disposed between adjacent stator windings 40 of different phases.
When the stator winding 40 is wound in a state where the first end insulating member 300 and the second end insulating member 400 are disposed on both sides in the axial direction of the stator core 20, the first end insulating is performed. The inner wall portion outer peripheral surface 322 of the inner wall portion 320 of the member 300 and the inner wall portion outer peripheral surface 422 of the inner wall portion 410 of the second end insulating member 400 are separated from the boundary of the region (winding region) in which the stator winding 40 can be wound. Become. In other words, in a state where the stator winding 40 is wound, the inner wall portion outer peripheral surface 322 of the inner wall portion 320 of the first end insulating member 300 and the inner wall outer peripheral surface of the inner wall portion 420 of the second end insulating member 400. A first gap S <b> 1 is formed between 422 and the first tooth tip outer peripheral surface 24 d on one side in the circumferential direction of the tooth tip 24, and the inner wall of the inner wall 320 of the first end insulating member 300. Between the outer peripheral surface 322 and the inner wall portion outer peripheral surface 422 of the inner wall portion 420 of the second end insulating member 400 and the second tip end portion outer peripheral surface 24e on the other side in the circumferential direction of the tooth tip portion 24 is the second. A gap S2 is formed.
In the conventional stator 10, the first edge portion on one side in the circumferential direction and the second edge portion on the other side in the circumferential direction of the interphase insulating member 50 bent in a V shape are formed in the slot 25. In order to dispose the first gap S2 and the first gap S1, the first gap S1 and the second gap are formed in at least one end insulating member, for example, the inner wall portion 320 of the first end insulating member 300. An interphase insulating member guide passage extending along the axial direction is formed so as to communicate with the gap S2. In the conventional stator 10, as shown in FIG. 13, the inner wall 320 of the first end insulating member 300 is notched on the inner wall 321 side and the first inner wall side 323 side. The first interphase insulating member guide passage constituted by the first notch portion 341 and the second notch portion 342 in which the second inner wall side surface 324 side is notched on the inner wall inner peripheral surface 321 side. A second interphase insulating member guide passage is formed. Or although illustration is abbreviate | omitted, it comprises the 1st groove | channel (slit) comprised by the 1st inner-wall part side surface 323, the 1st groove | channel (slit) which extends along the circumferential direction and is open in the axial direction both sides. A first interphase insulating member guide passage and a second inner wall side surface 324, and a second groove (slit) that extends along the circumferential direction and is open on both sides in the axial direction. An interphase insulating member guide passage is formed.
When the interphase insulating member 50 bent in a V shape is disposed between the adjacent stator windings 40, the interphase insulating member 50 and the first edge portion are arranged as shown in FIG. In a state where the gap between the second edge and the second edge is compressed, one end of the first edge and the second edge of the first end insulating member 300 adjacent in the circumferential direction is Among them, the second notch portion 342 (second interphase insulating member guide passage) of the inner wall 320 of the first end insulating member 300 on one side in the circumferential direction and the first end insulating member on the other side in the circumferential direction. After disposing the first notch 341 (first interphase insulating member guide passage) of the inner wall 320 of 300, the interphase insulating member 50 is moved along the axial direction. Accordingly, the first edge and the second edge of the interphase insulating member 50 are connected to the second gap S2 and the first gap S1 via the second notch 342 and the first notch 341. Placed inside. Then, the first edge and the second edge of the interphase insulating member 50 are held in the second gap S2 and the first gap S1 by the elastic restoring force.

JP2012-55098A

In the conventional concentrated winding stator, the inner wall portion 320 (inner wall portion outer peripheral surface 322) and the tooth tip portion 24 (outer periphery of the first tooth tip portion) of the stator core 20 are formed on the inner wall portion 320 of the first end insulating member 300. Interphase insulating member guide passage (notch) extending along the axial direction so as to communicate with the first gap S1 and the second gap S2 defined by the surface 24d and the second tooth tip outer peripheral surface 24e) Alternatively, a groove) is formed. Therefore, the length along the radial direction of the inner wall 320 of the first end insulating member 300 (the interval along the radial direction between the inner wall inner peripheral surface 321 and the inner wall outer peripheral surface 322) is increased. The occupied area of the inner wall 320 of the first end insulating member 300 in the slot 25 was large.
In recent years, an increase in the number of turns of the stator winding has been demanded. Therefore, the present inventor has studied various methods for reducing the occupied area in the slot of the inner wall portion of the end insulating member in which the interphase insulating member guide passage is formed. As a result, instead of the conventional method of inserting the interphase insulating member into the slot via the interphase insulating member guide passage formed in the inner wall portion of the end insulating member, the radially inner side through the slot opening Therefore, it is not necessary to form the interphase insulating member guide passage in the inner wall portion of the end insulating member, and the length along the radial direction of the inner wall portion of the end insulating member is shortened. Thus, it has been found that the area occupied by the inner wall portion of the end insulating member in the slot can be reduced.
The present invention has been made in view of such a point, and an object of the present invention is to provide a concentrated winding stator and a concentrated winding electric motor capable of increasing the number of turns of the stator winding.

The first invention relates to a stator, and more particularly to a concentrated winding stator in which a stator winding is wound by a concentrated winding method.
The stator of the present invention includes a stator core, a first end insulating member, a second end insulating member, a stator winding, and an interphase insulating member. Preferably, a slot insulating member inserted into the slot is provided.
The stator core has a yoke, a plurality of teeth, and a plurality of slots. The yoke extends along the circumferential direction. The teeth are formed by a tooth base extending radially inward from the yoke along the radial inner side, and a tooth tip provided on the radially inner peripheral side of the teeth base and extending in the circumferential direction. The The tooth tip has a tooth tip inner peripheral surface on the radially inner peripheral side, has a first tooth tip outer peripheral surface on one side in the radial direction, and has a circumferential periphery on the radially outer side. A second tooth tip outer peripheral surface is provided on the other side in the direction. The slot is formed by teeth adjacent in the circumferential direction, and has a slot opening between adjacent teeth tips.
The first end insulating member and the second end insulating member have an outer wall portion, a plurality of inner wall portions, and a plurality of connecting portions. The outer wall portion extends along the circumferential direction and the axial direction. The inner wall portion is disposed on the radially inner peripheral side from the outer wall portion, and extends along the circumferential direction and the axial direction. The inner wall portion has an inner wall portion inner peripheral surface on the radially inner peripheral side and an inner wall portion outer peripheral surface on the radial outer peripheral side. The connecting portion extends along the radial direction and connects the outer wall portion and the inner wall portion. The first end insulating member and the second end insulating member are arranged on the one axial side and the other axial side of the stator core, respectively, and the outer wall portion, the connecting portion, and the inner wall portion are the yokes of the stator core. The teeth base portion and the tooth tip portion are disposed to face each other. Preferably, end insulating members having the same structure are used for the first end insulating member and the second end insulating member.
The stator winding is wound in a state in which the first end insulating member and the second end insulating member are disposed on one axial side and the other axial side of the stator core. Preferably, the stator winding includes a concave portion (first concave portion) formed by the outer wall portion, the inner wall portion and the connecting portion of the first end insulating member, and the outer wall portion of the second end insulating member, It winds so that it may pass through the recessed part (2nd recessed part) formed by an inner wall part and a connection part.
In a state where the stator winding is wound, the inner wall portion of the first end insulating member disposed on one side in the axial direction and the second end insulating portion disposed on the other side in the axial direction with the tooth front end interposed therebetween. A first gap and a second gap defined by the inner wall portion of the first end insulating member, the inner wall portion of the second end insulating member, and the tooth tip are formed between the inner wall portion of the member and the inner wall portion of the member. It is comprised so that. The first gap includes an outer peripheral surface of the inner wall portion of the inner wall portion of the first end insulating member, an outer peripheral surface of the inner wall portion of the second end insulating member, and an outer peripheral surface of the first tooth tip portion of the tooth tip portion. The second gap is defined by the outer peripheral surface of the inner wall portion of the inner wall portion of the first end insulating member, the outer peripheral surface of the inner wall portion of the inner wall portion of the second end insulating member, and the second tooth of the tooth tip portion. It is defined by the outer peripheral surface of the tip portion.
The interphase insulating member includes a first edge portion including a first edge portion on one circumferential side, a second edge portion including a second edge portion on the other circumferential side, a first edge portion, and a first edge portion. The first central portion and the second central portion provided between the two edge portions, and the cross section is bent so as to have a V shape. The “first edge on one side in the circumferential direction” and the “second edge on the other side in the circumferential direction” are arranged on the one side in the circumferential direction among two edges that are spaced apart in the circumferential direction. The edge part arrange | positioned and the edge part arrange | positioned in the circumferential direction other side are shown. The first edge is disposed in one of the first gap and the second gap (preferably the second gap) formed in the slot, and the second edge is The first central portion and the second central portion are disposed in the other gap (preferably, the first gap), and the first central portion and the second central portion are radially disposed between the stator windings of different phases inserted into the slots. It is arranged to extend along. Since the first edge and the second edge of the interphase insulating member are disposed in one and the other of the first gap and the second gap, the interphase insulating member moves in the axial direction and the circumferential direction. Is regulated. Further, the first central portion and the second central portion of the interphase insulating member are arranged between the adjacent stator windings of different phases, so that the adjacent stator windings are insulated.
In the present invention, the interphase insulating member is inserted into the slot from the radially inner peripheral side through the slot opening. For this reason, on the inner wall of the end insulating member, the first edge and the second edge of the interphase insulating member are placed between the first gap and the second gap as in the conventional concentrated winding stator. There is no interphase insulating member guide passage extending along the axial direction to be disposed in one gap and the other gap.
In the present invention, since the interphase insulating member guide passage is not formed in the inner wall portion of the first and second end insulating members, the length along the radial direction of the inner wall portion of the first and second end insulating members. By shortening the length, the occupied area of the inner wall portion of the first and second end insulating members in the slot can be reduced. Thereby, the effective area in which the stator winding can be wound in the slot is increased, and the number of turns of the stator winding can be increased.
In another form of the first invention, the width of the first edge portion and the width of the second edge portion of the interphase insulating member are such that the interphase insulating member is positioned between the first edge portion and the second edge portion. When inserted into the slot from the radially inner peripheral side through the slot opening, from the bent portion between the first central portion and the second central portion, in a state compressed so as to shorten the interval, The length at which the first edge is inserted into one gap and the length at which the second edge is inserted into the other gap are set by the elastic restoring force. Preferably. The width of the first edge portion and the width of the second edge portion are set to be equal.
“Length of the first edge portion” indicates the length between the first edge portion and the first central portion, and “Width of the second edge portion” indicates the second edge portion and the first edge portion. The length between two central parts is shown.
In this embodiment, the interphase insulating member is compressed so as to be able to pass through the slot opening, and the inner periphery in the radial direction through the slot opening from the bent portion between the first center portion and the second center portion. By inserting into the slot from the side, the first edge and the second edge of the interphase insulating member are automatically inserted into one gap and the other gap. This facilitates the work of inserting the interphase insulating member into the slot, and enables the machine to insert the interphase insulating member into the slot, which is difficult with a conventional concentrated winding stator.
The second invention relates to an electric motor, and more particularly to a concentrated winding electric motor in which a stator winding is wound by a concentrated winding method.
The electric motor of the present invention includes any of the stators described above and a rotor that is supported so as to be rotatable relative to the stator.
The present invention has the same effect as the stator described above.

  In the stator and the electric motor of the present invention, the number of turns of the stator winding can be increased while winding the stator winding by the concentrated winding method.

It is a figure which shows one Embodiment of the stator which comprises the electric motor of this invention. It is an enlarged view of the part shown by the arrow II of FIG. It is sectional drawing which looked at FIG. 2 from the III-III line. FIG. 4 is an enlarged view of a portion indicated by an arrow IV in FIG. 3. It is a figure which shows one Embodiment of a phase insulation member. It is sectional drawing which looked at FIG. 5 from the VI-VI line. It is a figure which shows the state which compressed the phase insulation member. It is sectional drawing which looked at FIG. 7 from the XIII-XIIIIX line. It is a figure explaining the operation | movement which inserts an interphase insulation member in a slot. It is a figure explaining the operation | movement which inserts an interphase insulation member in a slot. It is a figure explaining the operation | movement which inserts an interphase insulation member in a slot. It is a perspective view of the conventional stator. It is the enlarged view to which the principal part of sectional drawing which looked at FIG. 12 from the XIII-XIII line was expanded.

Embodiments of the present invention will be described below with reference to the drawings.
In this specification, the description “axial direction” refers to a rotation center line passing through the rotation center O (see FIG. 3) of the rotor in a state where the rotor is disposed so as to be rotatable relative to the stator. The direction of P (see FIG. 1) is shown. The description of “circumferential direction” means that the center of rotation O is the center when viewed in a cross section perpendicular to the axial direction (see FIG. 3) in a state where the rotor is arranged to be rotatable relative to the stator. Indicates the circumferential direction to be performed. The description “radial direction” indicates a direction passing through the rotation center O when viewed in a cross section perpendicular to the axial direction in a state where the rotor is disposed so as to be rotatable relative to the stator. The description “radially inner peripheral side” indicates the rotation center O side along the radial direction, and the description “radial outer peripheral side” indicates the side opposite to the rotation center O along the radial direction.
For the end insulating member, the descriptions “axial direction”, “circumferential direction”, and “radial direction” indicate that the end insulating member is disposed at a position facing the core end surface of the stator core. “Axial direction”, “circumferential direction” and “radial direction” are shown.
In the following, in the cross section perpendicular to the axial direction (FIGS. 3 and 4), the clockwise direction is referred to as “circumferential one side” and the counterclockwise direction is referred to as “circumferential other side”. The “direction one side” and the “circumferential direction other side” may be opposite directions.

An embodiment 10 of a stator constituting the electric motor of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a stator 10 according to an embodiment. 2 is an enlarged view of a portion indicated by an arrow II in FIG. 1, FIG. 3 is a cross-sectional view of FIG. 2 taken along line III-III, and FIG. 4 is an arrow in FIG. It is the enlarged view to which the part shown by IV was expanded.
The electric motor of the present invention includes a stator 10 shown in FIG. 1 and a rotor (not shown) supported so as to be rotatable relative to the stator 10. As the rotor, a rotor corresponding to the type of electric motor is used.

The stator 10 according to this embodiment includes a stator core 20, a slot insulating member 30, a stator winding 40, an interphase insulating member 50, a first end insulating member 100, and a second end insulating member 200. ing.
The stator core 20 is constituted by a plurality of laminated electromagnetic steel plates, and has core end faces on both sides in the axial direction. In FIG. 1, a core end surface 20A is provided on one side in the axial direction, and a core end surface 20B is provided on the other side in the axial direction.
The stator core 20 has a yoke 21, a plurality of teeth 22, and a plurality of slots 25. The yoke 21 extends along the circumferential direction when viewed in a cross section perpendicular to the axial direction (FIGS. 3 and 4). The teeth 22 are provided on the radially inner peripheral side (rotation center side) of the tooth 21 along the radial direction from the yoke 21, and on the radially inner peripheral side of the teeth base 23, and extend along the circumferential direction. It is formed by the tooth | gear tip part 24 which exists.
The teeth base 23 includes a first teeth base side surface (tooth side surface on one side in the circumferential direction) 23a formed on one side in the circumferential direction, and a second tooth base side surface (the other side in the circumferential direction) formed on the other side in the circumferential direction. Teeth base side surface) 23b.
The teeth tip 24 includes a teeth tip inner peripheral surface 24a formed on the radially inner periphery side, a first teeth tip side surface (a tooth tip side surface on one side in the circumferential direction) 24b formed on one side in the circumferential direction, A second tooth tip side surface (side surface in the other circumferential direction) 24c formed on the other side in the circumferential direction, and a first tooth tip side surface formed on the one circumferential side on the radially outer side. 24d (formed between the first tooth base side surface 23a) and the first tooth tip outer peripheral surface (circumferential one tooth tip outer peripheral surface) 24d, on the radially outer peripheral side, on the other circumferential side The formed second tooth tip outer peripheral surface (the outer peripheral surface of the tooth tip end on the other side in the circumferential direction) 24e (formed between the second tooth tip side surface 24c and the second tooth base side surface 23b) Have.
A slot 25 is formed by the teeth 22 adjacent in the circumferential direction. The slot 25 has a slot opening 25 a between adjacent tooth tips 24. The stator winding 40 is inserted into the slot 25 through the slot insulating member 30. An interphase insulating member 50 disposed between adjacent stator windings 40 of different phases is inserted into the slot 25. The interphase insulating member 50 will be described later.
A rotor insertion space 20a into which the rotor is inserted is formed by the tooth tip inner circumferential surface 24a of the tooth tip 24.
A positioning recess 26 is formed in the core end surfaces 20A and 20B of the stator core 20.

The first end insulating member 100 and the second end insulating member 200 are disposed on the one axial side and the other axial side of the stator core 20, respectively. In the present embodiment, the first end insulating member 100 and the second end insulating member 200 have the same configuration. Therefore, the configuration of the first end insulating member 100 will be described below. In the following description, when describing the same constituent elements as the constituent elements of the first end insulating member 100 among the constituent elements of the second end insulating member 200, The code | symbol attached | subjected to the component and the code | symbol other than the 3rd digit are the same are used.
In addition, even when the 1st edge part insulation member 100 and the 2nd edge part insulation member do not have the same structure, both basic structure is the same.
The first end insulating member 100 is formed of a resin having insulating properties (referred to as “resin bobbin”) and has an insulating member end surface 100A. The first end insulating member 100 is fixed on one side in the axial direction of the stator core 20 so that the insulating member end surface 100A faces the core end surface 20A of the stator core 20 or so as to face the core end surface 20B. It arrange | positions at the axial direction other side of the child core 20. FIG.

The first end insulating member 100 includes an outer wall portion 110, a plurality of inner wall portions 120, and a plurality of connecting portions 130.
The outer wall portion 110 extends along the circumferential direction and the axial direction. The outer wall portion 110 has an outer wall portion inner peripheral surface 111 formed on the radially inner peripheral side and an outer wall portion outer peripheral surface 112 formed on the radial outer peripheral side.
The inner wall portion 120 is disposed on the radially inner peripheral side (rotation center side) from the outer wall portion 110, and extends along the circumferential direction and the axial direction. The inner wall portion 120 includes an inner wall portion inner peripheral surface 121 formed on the radially inner peripheral side, an inner wall portion outer peripheral surface 122 formed on the radially outer peripheral side, and a first inner wall portion side surface (circumferential side) formed on one side in the circumferential direction. The inner wall side surface on one side in the direction 123, the second inner wall side surface formed on the other side in the circumferential direction (the inner wall side surface on the other side in the circumferential direction) 124, and the insulating member end surface 100A side (stator core) along the axial direction. 20 side), the first inner wall end face (the inner wall end face on one side in the circumferential direction) 125 formed on one side in the circumferential direction, the insulating member end face 100A side (stator core 20 side) along the axial direction, A second inner wall end face (an inner wall end face on the other circumferential side) 126 formed on the other circumferential side is provided. A rotor insertion space 100 a into which the rotor is inserted is formed by the inner wall 121 of the inner wall 120.
The connecting portion 130 extends along the radial direction and connects the outer wall portion 110 and the inner wall portion 120. The connecting portion 130 includes a first connecting portion side surface (a connecting portion side surface on one side in the circumferential direction) 131 formed on one side in the circumferential direction, and a second connecting portion side surface (the other side in the circumferential direction) formed on the other side in the circumferential direction. , And a connecting portion inner peripheral surface 133 formed on the radially inner peripheral side. In the present embodiment, the connecting portion inner peripheral surface 133 is formed flush with the inner wall portion inner peripheral surface 121.
When the stator winding 40 is wound around the teeth 22 (specifically, the teeth base portion 23) by the outer wall portion 110, the inner wall portion 120, and the connecting portion 130, there is a recess in which the stator winding 40 is accommodated (through). Formed (FIG. 2).
A positioning protrusion 140 that can be fitted into the positioning recess 26 formed in the core end surface 20A or 20B of the stator core 20 is formed on the insulating member end surface 100A of the first end insulating member 100. By fitting the positioning protrusion 140 into the positioning recess 26, the arrangement position of the first end insulating member 100 with respect to the stator core 20 can be easily set. Thereby, the outer wall part 110, the connection part 130, and the inner wall part 120 of the 1st edge part insulation member 100 are easily arrange | positioned in the position which opposes the yoke 21, the teeth base 23, and the teeth front-end | tip part 24 of the stator core 20. The

The stator winding 40 is formed in a state where the first end insulating member 100 and the second end insulating member 200 are disposed on one axial side and the other axial side of the stator core 20. It is wound around the teeth 22 (the teeth base 23). Specifically, it is wound through the connecting portion 130 of the first end insulating member 100 and the connecting portion 230 of the second end insulating member 200.
At this time, the inner wall 120 of the first end insulating member 100 is disposed at the position shown in FIG. 4 with respect to the teeth 22 of the stator core 20. That is, the inner wall portion outer peripheral surface 122 of the inner wall portion 120 of the first end insulating member 100 is the first tooth tip outer peripheral surface 24d of the tooth tip portion 24 of the stator core 20 and the second tooth tip outer peripheral surface. It is arranged on the radially outer peripheral side from 24e. The inner wall 220 of the second end insulating member 200 is also arranged in the same manner.
The stator winding 40 is wound around a recess formed by the outer wall portion 110, the inner wall portion 120 and the connecting portion 130 of the first end insulating member 100. That is, the first inner wall outer peripheral surface 122 of the inner wall 120 of the first end insulating member 100 defines the boundary of the region (winding region) in the slot 25 where the stator winding 40 can be wound.
For this reason, in a state where the stator winding 40 is wound, the inner wall portion 120 of the first end insulating member 100 disposed on one side in the axial direction of the stator core 20 and the other side in the axial direction are disposed. A first gap S1 and a second gap S2 are formed between the inner wall 220 of the second end insulating member 200. The first gap S1 includes the inner wall portion outer peripheral surface 122 of the inner wall portion 120 of the first end insulating member 100, the inner wall outer peripheral surface 222 of the inner wall portion 220 of the second end insulating member 200, and the stator core 20. It is prescribed | regulated by the 1st teeth front-end | tip part outer peripheral surface 24d of the teeth front-end | tip part 24. FIG. The second gap S2 includes the inner wall portion outer peripheral surface 122 of the inner wall portion 120 of the first end insulating member 100, the inner wall outer peripheral surface 222 of the inner wall portion 220 of the second end insulating member 200, and the stator core. It is prescribed | regulated by the 2nd teeth front-end | tip outer peripheral surface 24e of 20 teeth front-end | tip parts 24. FIG.

Next, the interphase insulating member 50 used in the stator 10 of this embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view of the interphase insulating member 50, and FIG. 6 is a cross-sectional view of FIG. 5 taken along line VI-VI.
The interphase insulating member 50 shown in FIG. 5 is formed by bending a rectangular insulating film. That is, the interphase insulating member 50 includes a first edge portion 51a including the first edge portion 50a, a second edge portion 51d including the second edge portion 50b, and the first edge portion 51a and the second edge portion. A first bent portion 52a between the first edge portion 51a and the first central portion 51b, and a first bent portion 52a between the first edge portion 51a and the first central portion 51b. At the second bent portion 52b between the first central portion 51b and the second central portion 51c, and at the third bent portion 52c between the second central portion 51c and the second edge portion 51d, The cross section is bent so as to have a V shape. In the present embodiment, as shown in FIG. 6, the first central portion 51b is bent at an angle θ1 with respect to the first edge portion 51a, and the second central portion is bent with respect to the first central portion 51b. The portion 51c is bent at an angle θ2, and the second edge portion 51d is bent at an angle θ3 with respect to the second central portion 51c. In addition, the description that “the cross section is bent so as to have a V shape” means “the first central portion 51 c and the second central portion 51 d are bent in a V shape”.

Next, an operation for inserting the interphase insulating member 50 into the slot 25 will be described.
In the present embodiment, the interphase insulating member 50 bent in a V shape is arranged such that the first edge portion 50a and the second edge portion 50b extend in the axial direction. That is, the first edge 50a of the interphase insulating member 50 is disposed on one side in the circumferential direction, and the second edge 50b is disposed on the other side in the circumferential direction.
The first edge 50a arranged on one side in the circumferential direction corresponds to the “first edge on one side in the circumferential direction” of the present invention, and the second edge 50b arranged on the other side in the circumferential direction is This corresponds to “the second edge portion on the other side in the circumferential direction” of the present invention.

As described above, when the stator winding 40 is wound in a state where the first end insulating member 100 and the second end insulating member 200 are arranged on both sides in the axial direction of the stator core 20, Specifically, the inner wall 120 of the first end insulating member 100, the inner wall 220 of the second end insulating member 200, and the teeth are placed in a space surrounded by the slot insulating member 30 inserted into the slot 35). A first gap S1 and a second gap S2 defined by the tip portion 24 are formed.
In the conventional concentrated winding stator, an interphase insulating member guide passage extending along the axial direction is formed in the inner wall portion of the end insulating member so as to communicate with the first gap S1 and the second gap S2. The first edge and the second edge of the interphase insulating member are disposed in one gap and the other gap via the interphase insulating member guide passage.
In the present invention, the interphase insulating member is inserted into the slot from the radially inner peripheral side through the slot opening, so that the first edge and the second edge of the interphase insulating member are inserted into one gap and It arrange | positions in the other clearance gap.

The operation of inserting the interphase insulating member 50 into the slot 25 from the radially inner peripheral side through the slot opening 25a will be specifically described with reference to FIGS.
In the present embodiment, the width L1 of the first edge portion 51a and the width L2 of the second edge portion 51d shown in FIG. 6 are the slot openings in a state where the interphase insulating member 50 is compressed. When moving from the radially inner peripheral side into the slot 25 through 25a, the length by which the first edge 50a is inserted into one gap and the second edge 50b by the elastic return force The length inserted into the gap is set. The length L1 of the first edge portion 51a is the length between the first edge portion 50a and the first central portion 51b, and the width L2 of the second edge portion 51d is the second edge portion. This is the length between 50b and the second central portion 51c. Preferably. The width L1 of the first edge portion 51a and the width L2 of the second edge portion 51d are set to be equal.
FIG. 9 shows a state before the first edge portion 50a and the second edge portion 50b pass through the slot opening 25a, and FIG. 9B shows the direction of FIG. 9A in the direction of the arrow (b). FIG. 9C is a cross-sectional view of FIG. 9A viewed from line (c)-(c). FIG. 10 shows a state in which the first edge 50a and the second edge 50b have passed through the slot opening 25a, and FIG. 10B shows FIG. 10A viewed from the direction of the arrow (b). FIG. 10 (c) is a cross-sectional view of FIG. 10 (a) viewed from line (c)-(c). FIG. 11 shows a state in which the first edge portion 51a and the second edge portion 51d have passed through the slot opening 25a, and FIG. 11B shows FIG. 11A viewed from the direction of the arrow (b). FIG. 11C is a cross-sectional view of FIG. 11A viewed from line (c)-(c).
In addition, 40a shown by FIGS. 9-11 is the boundary of the winding area | region prescribed | regulated by the inner wall part outer peripheral surface 122 of the inner wall part 120 of the 1st edge part insulation member 100. FIG.

First, as shown in FIG. 7, the interphase insulating member 50 is compressed so that the distance between the first edge 50a and the second edge 50b is shortened. At this time, the interphase insulating member 50 is compressed so as to pass through the slot opening 25a. For example, as shown in FIG. 8, the first central portion 51b is bent at an angle α1 (> θ1) with respect to the first edge portion 51a, and the second central portion 51b is bent with respect to the second central portion 51b. The central portion 51c is bent at an angle α2 (> θ2), and the second edge portion 51d is compressed so as to be bent at an angle α3 (> θ3) with respect to the second central portion 51c. At this time, when the compression force is released, the interphase insulating member 50 is compressed so as to be restored to the original shape by the elastic return force.
Then, the interphase insulating member 50 in the compressed state is radially inward from the second bent portion 52b between the first central portion 51b and the second central portion 51c via the slot opening 25a. To the slot 25.

In the state shown in FIG. 9, since the first edge portion 50a and the second edge portion 50b do not pass through the slot opening 25a, the interphase insulating member 50 maintains a compressed state.
In the state shown in FIG. 10, since the first edge 50a and the second edge 50b pass through the slot opening 25a, the first edge 50a is The first bent portion 52a between the edge portion 51a and the first center portion 51b is rotated in a direction away from the first center portion 51b, and the second edge portion 50b is Rotate in a direction away from the second central portion 51c around the third bent portion 52c between the edge portion 51d and the second central portion 51c. Here, since the elastic restoring force of the interphase insulating member 50, the width L1 of the first edge portion 51a, and the width L2 of the second edge portion 51d are appropriately set, the first edge portion 50a and the second edge portion 51d are appropriately set. When the edge 50b passes through the slot opening 25a and then returns to its original shape by the elastic return force, the first edge 50a and the second edge 50b have the first gap S1 and the second gap S2. Are automatically inserted into one and the other.
In the state shown in FIG. 11, the first edge portion 51a and the second edge portion 51d pass through the slot opening 25a. Therefore, the first central portion 51b and the second central portion 51c inserted so as to extend in the radial direction between the stator windings 40 of different phases in the slot 25 in a compressed state. Rotates around the second bent portion 52b between the first central portion 51b and the second central portion 51c in directions away from each other. Thereby, the first edge portion 51a and the second edge portion 51d are pushed into one gap and the other gap, and the movement along the axial direction and the movement along the circumferential direction of the interphase insulating member 50 are ensured. Be regulated.

As described above, in the present embodiment, the interphase insulating member 50 is moved from the radially inner peripheral side into the slot 25 through the slot opening 25a, whereby the first interphase insulating member 50 on the one side in the circumferential direction is moved. The first gap 50a and the second edge 50b on the other side in the circumferential direction are connected to the first gap S1 and the second gap defined by the inner wall portions 120, 220 of the end insulating members 100, 200 and the tooth tip 24. It arrange | positions so that it may arrange | position in the clearance gap S2.
Thereby, the interphase insulating member guide passage conventionally formed in the inner wall portion of the end insulating member becomes unnecessary. Therefore, the length along the radial direction of the inner wall portions 120 and 220 of the end insulating members 100 and 200 can be shortened, and the occupied area of the inner wall portions 120 and 220 in the slot 25 can be reduced. The number of turns of the stator winding 40 can be increased.
Further, the first edge portion 50a on the one side in the circumferential direction of the interphase insulating member 50 and the circumferential direction can be simply moved by moving the interphase insulating member 50 from the radially inner week side into the slot through the slot opening 25a. Since the second edge 50b on the other side can be automatically inserted into the first gap S1 and the second gap S2, the slot of the interphase insulating member 50 using a machine, which has been difficult in the past, has been difficult. The insertion work into 25 becomes possible.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
The configuration of the end insulating member is not limited to the configuration described in the embodiment.
The end insulating members arranged on both sides in the axial direction of the stator core may be end insulating members having the same structure or end insulating members having different structures.
As an interphase insulating member, a first edge portion including a first edge portion on one circumferential side, a second edge portion including a second edge portion on the other circumferential side, a first edge portion and a second edge portion An interphase insulating member having a first central portion and a second central portion provided between the edge portions and bent in a V shape is used, but the interphase insulating member is at least one in the circumferential direction. A first edge portion including a first edge portion on the side, a second edge portion including a second edge portion on the other circumferential side, and provided between the first edge portion and the second edge portion. The first edge and the second edge are disposed in one gap and the other gap of the first gap and the second gap, and the middle portions are adjacent to each other. What is necessary is just to be comprised so that arrangement | positioning is possible so that it may extend along a radial direction between the stator windings of a different phase.
The present invention can be configured as various types of electric motors.

DESCRIPTION OF SYMBOLS 10 Electric motor 20 Stator core 20A, 20B Core end surface 20a Rotor insertion space 21 Yoke 21a Yoke inner peripheral surface 22 Teeth 23 Teeth base 23a 1st teeth base side (The teeth base one side of the circumferential direction)
23b 2nd teeth base side (circumferential other side teeth base side)
24 Teeth tip 24a Teeth tip inner peripheral surface 24b First teeth tip side (circumferential one side tooth tip side)
24c 2nd teeth tip part side (circumferential other side tooth tip part side)
24d First teeth tip outer peripheral surface (circumferential one side tooth tip outer peripheral surface)
24e Second teeth tip outer peripheral surface (circumferential other side tooth tip outer peripheral surface)
25 slot 25a slot opening 26 positioning recess 30 slot insulating member 40 stator winding 50 interphase insulating member 50a first edge 50a second edge 50c first end 50d second end 51a first Edge portion 51b First central portion 51c Second central portion 51d Second edge portion 52a First bent portion 52b Second bent portion 52c Third bent portion 60 Insulating sheet 60A First surface 60B Second Surface 60a first edge 60b second edge 60c first end 60d second end 61a first part 61b second part 61c third part 61d fourth part 62a first fold Line 62b Second fold line 62c Third fold line 100, 200, 300, 400 End insulating member 100A Insulating member end surface 100a Rotor insertion space 110, 210, 31 , 410 outer wall 111 outer wall inner peripheral surface 112 outer wall outer peripheral surface 120, 220, 320, 420 inner wall 121, 321 inner wall inner peripheral surface 122, 322 inner wall outer peripheral surface 123, 323 first inner wall side surface (one circumferential direction) Side wall side)
124, 324 Second inner wall side surface (the inner wall side surface on the other side in the circumferential direction)
125 1st inner wall part end surface (inner wall part end surface of the circumferential direction one side)
126 Second inner wall end face (end face on the other circumferential side)
130, 230, 330, 430 Connecting part 131, 331 First connecting part side surface (circumferential one side connecting part side surface)
132, 332 2nd connection part side surface (circumferential other side connection part side surface)
133 Connecting portion inner peripheral surfaces 140, 240 Positioning projection 341 First notch (first interphase insulating member guide passage)
241a Notch surface 342 Second notch (second interphase insulating member guide passage)
342a Notch surface S1 First gap S2 Second gap

Claims (3)

A stator constituting an electric motor,
A stator core, a first end insulating member, a second end insulating member, a stator winding, and an interphase insulating member;
The stator core is provided on a radially inner peripheral side of the teeth extending from a yoke extending along the circumferential direction, a teeth base extending radially from the yoke toward the radial inner periphery, and the teeth base; A plurality of teeth formed by teeth tips extending along the circumferential direction, and a plurality of slots formed by teeth adjacent in the circumferential direction and having a slot opening between adjacent teeth tips,
The tooth tip has a tooth tip inner peripheral surface on the radially inner peripheral side, has a first tooth tip outer peripheral surface on one side in the radial direction, and on the radially outer peripheral side, A second tooth tip outer peripheral surface on the other circumferential side;
The first end insulating member and the second end insulating member are arranged on an outer peripheral wall portion extending along a circumferential direction and an axial direction, and on a radially inner peripheral side from the outer wall portion. A plurality of inner wall portions extending along the axial direction, and a plurality of connecting portions extending along the radial direction and connecting the outer wall portion and the inner wall portions;
The inner wall portion has an inner wall portion outer peripheral surface on the radially outer peripheral side, and an inner wall portion inner peripheral surface on the radial inner peripheral side,
The first end insulating member and the second end insulating member are arranged on the one axial side and the other axial side of the stator core, and the outer wall portion, the connecting portion, and the inner wall portion are the stator. Arranged to face the yoke of the core, the teeth base and the teeth tip,
The stator winding is wound in a state where the first end insulating member and the second end insulating member are arranged on one axial side and the other axial side of the stator core,
In the state where the stator winding is wound, the stator coil is disposed on the inner wall portion and the other axial side of the first end insulating member disposed on one side in the axial direction with the tooth tip portion interposed therebetween. Between the inner wall portion of the second end insulating member, the outer peripheral surface of the inner wall portion of the inner wall portion of the first end insulating member and the inner wall portion of the second end insulating member. A first gap defined by the outer peripheral surface of the inner wall portion and the outer peripheral surface of the first tooth tip portion of the tooth tip portion; the inner wall portion outer peripheral surface of the inner wall portion of the first end insulating member; A second gap defined by the outer peripheral surface of the inner wall portion of the inner wall portion of the second end insulating member and the outer peripheral surface of the second tooth tip portion of the tooth tip portion is formed,
The interphase insulating member includes a first edge portion including a first edge portion on one circumferential side, a second edge portion including a second edge portion on the other circumferential side, and the first edge portion. And a second central portion provided between the first edge portion and the second edge portion, wherein the first edge portion is bent so as to have a V-shaped cross section. Is arranged in one of the first gap and the second gap formed in the slot, and the second edge is arranged in the other gap, A central portion and the second central portion are arranged to extend along a radial direction between stator windings of different phases inserted into the slot;
The inner wall portion of the first end insulating member and the inner wall portion of the second end insulating member are connected to the first edge and the second edge of the interphase insulating member. A stator having no interphase insulating member guide passage for disposing in one gap and the other gap of the gap and the second gap. The stator according to claim 1,
The length along the circumferential direction of the first edge portion and the second edge portion of the interphase insulating member is such that the interphase insulating member is positioned between the first edge portion and the second edge portion. When the first edge is inserted into the slot through the slot opening from the radially inner peripheral side in a compressed state so that the interval of the first gap is reduced, And the second edge is set so as to be inserted into the other gap.   An electric motor comprising a stator and a rotor that is rotatably supported relative to the stator, wherein the stator according to claim 1 or 2 is used as the stator. Features an electric motor.

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