US-12627197-B2 - Stator and rotating electric machine

US12627197B2US 12627197 B2US12627197 B2US 12627197B2US-12627197-B2

Abstract

A stator includes: an annular stator core having tooth portions; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of the corresponding windings. The stator is connected to an electrical connection target via the terminals. Each of the terminals has a connection terminal portion axially extending so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion extending between the connection terminal portion and the winding connection portion in a circumferential direction. Each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to maintain its posture.

Inventors

Katsuyoshi Miyaji
Seiichi Murakami

Assignees

DENSO CORPORATION

Dates

Publication Date: 20260512
Application Date: 20230713
Priority Date: 20210113

Claims (8)

1 . A stator comprising: an annular stator core that has a plurality of tooth portions extending radially inward and arranged in a circumferential direction; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions of the stator core with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of corresponding ones of the windings, wherein: the stator is configured to be connectable to an electrical connection target via the terminals; each of the terminals has a connection terminal portion extending in an axial direction so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion formed between the connection terminal portion and the winding connection portion and extending in the circumferential direction; each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to be capable of maintaining its posture; the insulator has a plurality of the supporting portions arranged in the circumferential direction; each of the supporting portions has a mounting hole extending in the axial direction; the extension portion of each of the terminals has a plurality of mounting pieces extending in the axial direction and fitted in the mounting holes of corresponding ones of the supporting portions; the plurality of mounting pieces include both a press-fitting piece press-fitted in the mounting hole of the corresponding supporting portion and an insertion piece loosely fitted in the mounting hole of the corresponding supporting portion; and the extension portion of each of the terminals has the press-fitting piece located closer to the winding connection portion than to the connection terminal portion in the circumferential direction, and has the insertion piece located closer than the press-fitting piece to the connection terminal portion in the circumferential direction.
2 . The stator as set forth in claim 1 , wherein: each of the terminals has, on at least one side of a proximal end portion of each of the mounting pieces, an abutting edge extending in a direction perpendicular to the axial direction; and the abutting edge abuts against an abutting surface of the corresponding supporting portion of the insulator in the axial direction.
3 . The stator as set forth in claim 1 , wherein the mounting holes of the supporting portions of the insulator are formed at equal intervals in the circumferential direction of the stator core.
4 . The stator as set forth in claim 1 , wherein in each of the terminals, the connection terminal portion and the winding connection portion are formed apart from each other by a distance corresponding to one of the tooth portions or longer.
5 . The stator as set forth in claim 1 , wherein in each of the terminals, the connection terminal portion is formed to be thinner than the extension portion.
6 . A rotating electric machine comprising a stator and a rotor, the stator comprising: an annular stator core that has a plurality of tooth portions extending radially inward and arranged in a circumferential direction; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions of the stator core with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of corresponding ones of the windings, the stator being configured to be connectable to an electrical connection target via the terminals, the rotor being configured to be driven, under a rotating magnetic field generated by the stator, to rotate, wherein: each of the terminals has a connection terminal portion extending in an axial direction so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion formed between the connection terminal portion and the winding connection portion and extending in the circumferential direction; each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to be capable of maintaining its posture; the insulator has a plurality of the supporting portions arranged in the circumferential direction; each of the supporting portions has a mounting hole extending in the axial direction; the extension portion of each of the terminals has a plurality of mounting pieces extending in the axial direction and fitted in the mounting holes of corresponding ones of the supporting portions; the plurality of mounting pieces include both a press-fitting piece press-fitted in the mounting hole of the corresponding supporting portion and an insertion piece loosely fitted in the mounting hole of the corresponding supporting portion; and the extension portion of each of the terminals has the press-fitting piece located closer to the winding connection portion than to the connection terminal portion in the circumferential direction, and has the insertion piece located closer than the press-fitting piece to the connection terminal portion in the circumferential direction.
7 . A stator comprising: an annular stator core that has a plurality of tooth portions extending radially inward and arranged in a circumferential direction; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions of the stator core with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of corresponding ones of the windings, wherein: the stator is configured to be connectable to an electrical connection target via the terminals; each of the terminals has a connection terminal portion extending in an axial direction so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion formed between the connection terminal portion and the winding connection portion and extending in the circumferential direction; each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to be capable of maintaining its posture; and in each of the terminals, the connection terminal portion and the winding connection portion are formed apart from each other by a distance corresponding to one of the tooth portions or longer.
8 . A rotating electric machine comprising a stator and a rotor, the stator comprising: an annular stator core that has a plurality of tooth portions extending radially inward and arranged in a circumferential direction; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions of the stator core with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of corresponding ones of the windings, the stator being configured to be connectable to an electrical connection target via the terminals, the rotor being configured to be driven, under a rotating magnetic field generated by the stator, to rotate, wherein: each of the terminals has a connection terminal portion extending in an axial direction so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion formed between the connection terminal portion and the winding connection portion and extending in the circumferential direction; each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to be capable of maintaining its posture; and in each of the terminals, the connection terminal portion and the winding connection portion are formed apart from each other by a distance corresponding to one of the tooth portions or longer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation application of International Application No. PCT/JP2022/000557 filed on Jan. 11, 2022, which is based on and claims priority from Japanese Patent Application No. 2021-003674 filed on Jan. 13, 2021. The entire contents of these applications are incorporated by reference into the present application. BACKGROUND 1 Technical Field The present disclosure relates to stators and rotating electric machines. 2 Description of Related Art There are known stators of rotating electric machines which employ terminals made of an electrically-conductive metal plate to connect end portions of windings to an electrical component such as a circuit board. The terminals are mounted to and thus supported by an insulator that is made of an electrically-insulative resin material and mounted to a stator core. SUMMARY According to a first aspect of the present disclosure, there is provided a stator which includes: an annular stator core that has a plurality of tooth portions extending radially inward and arranged in a circumferential direction; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions of the stator core with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of corresponding ones of the windings. The stator is configured to be connectable to an electrical connection target via the terminals. Each of the terminals has a connection terminal portion extending in an axial direction so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion formed between the connection terminal portion and the winding connection portion and extending in the circumferential direction. Each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to be capable of maintaining its posture. According to a second aspect of the present disclosure, there is provided a rotating electric machine which includes a stator and a rotor. The stator includes: an annular stator core that has a plurality of tooth portions extending radially inward and arranged in a circumferential direction; an insulator made of an electrically-insulative resin material and covering predetermined parts of the stator core; windings wound on the tooth portions of the stator core with the insulator interposed therebetween; and terminals made of an electrically-conductive metal plate and connected with end portions of corresponding ones of the windings. The stator is configured to be connectable to an electrical connection target via the terminals. The rotor is configured to be driven, under a rotating magnetic field generated by the stator, to rotate. Each of the terminals has a connection terminal portion extending in an axial direction so as to be connected to the connection target, a winding connection portion connected with the end portions of the corresponding windings, and an extension portion formed between the connection terminal portion and the winding connection portion and extending in the circumferential direction. Each of the terminals is supported, with part of the extension portion thereof abutting against a supporting portion of the insulator at a plurality of positions, so as to be capable of maintaining its posture. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a rotating electric machine according to an embodiment. FIG. 2 is an exploded perspective view showing the rotating electric machine according to the embodiment. FIG. 3 is a perspective view showing a stator according to the embodiment. FIG. 4 is another perspective view showing the stator according to the embodiment. FIG. 5 is a plan view showing the stator according to the embodiment. FIG. 6 is a connection diagram of windings according to the embodiment. FIG. 7 is another connection diagram of the windings according to the embodiment. FIG. 8 is a perspective view showing a terminal according to the embodiment. FIG. 9 is a perspective view showing another terminal according to the embodiment. FIG. 10 is a perspective view showing yet another terminal according to the embodiment. FIG. 11 is a perspective view showing a terminal according to a modification. FIG. 12 is a perspective view showing a terminal according to another modification. FIG. 13 is a perspective view showing a terminal according to another modification. FIG. 14 is a perspective view showing a terminal according to another modification. FIG. 15 is a perspective view showing a terminal according to another modification. FIG. 16 is a perspective view showing a terminal according to another modification. DESCRIPTION OF EMBODIMENTS In the above-descr