Stator for rotating electric machine and manufacturing method for the same

• US 8,471,419 B2
• Filed: 11/05/2008
• Issued: 06/25/2013
• Est. Priority Date: 11/09/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Shimomura, Ryuichi, Akita, Hiroyuki, Nakaue, Takumi, Sakaue, Atsushi
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US12/741,312
• Publication Number:
  US 20110156512A1
• Time in Patent Office: 1,693 Days
• Field of Search: 310/71, 310/185
• US Class Current: 310/71
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 2203/09 Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

The present invention relates to a rotating electric machine stator that includes connecting members for connecting jumper wires to each other between neighboring magnetic pole coils of the rotating electric machine stator, and its manufacturing method. In a conventional connecting member, its portions to be connected to the jumper wires are figure-U shaped and have openings on the opposite side to a core'"'"'s end-face where the jumper wires are disposed, so that, in order to insert the jumper wires into the openings, complex drive controls have been required for the connecting portions being figure-U shaped. In order to simplify the drive controls, such connecting portions being made in curved shapes have openings each facing the end-face of a core. It is possible to generally apply the present invention to rotating electric machine stators that obey coil connection specifications.

Claims

1. A rotating electric machine stator, comprising:

a core having a plurality of magnetic pole portions;

coils wound around the respective plurality of magnetic pole portions;

jumper wires for electrically interconnecting the coils adjacent to each other by way of wires integral with the adjacent coils; and

connecting members for electrically connecting between the jumper wires placed at different positions, wherein

each of the connecting members includes a plurality of conductive coil-connecting terminals having the open-figured ports made of conductors that are opened toward an end-face of the core, and a conductive connection member for electrically connecting between the plurality of conductive coil-connecting terminals;

the plurality of conductive coil-connecting terminals each include, in addition to the open-figured ports, connection parts that are placed nearer to a radially inner side of the core than the open-figured ports and made of conductors connected to the conductive connection member, and extension conductor portions that connect between the open-figured ports and the connection parts;

the conductive connection member includes at least one arc-shaped conductor portion being a conductor of an approximately circular arc that is electrically connected to the respective connection parts of the plurality of conductive coil-connecting terminals to thereby interconnect between the connection parts; and

the jumper wires are inserted and fixed in the open-figured ports being directed toward the end-face of the core, to electrically connect the jumper wires to the open-figured ports.

2. The rotating electric machine stator as set forth in claim 1, wherein the respective connection parts are all placed at the same radial positions toward the radially inner side, with respect to at least more than one of the plurality of conductive coil-connecting terminals.

3. The rotating electric machine stator as set forth in claim 1, wherein the respective connection parts are placed at partly different radial positions toward the radially inner side, with respect to at least one of the plurality of conductive coil-connecting terminals, whereby the conductive connection member is constituted by joining together a plurality of said arc-shaped conductor portions.

4. The rotating electric machine stator as set forth in claim 1, wherein each of the connection parts is curved to have an open-figured port, and the conductive connection member is inserted and fixed into the open-figured port of at least one of the connection parts.

5. A method of manufacturing a rotating electric machine stator, comprising coil winding steps at which coils are wound for a plurality of respective magnetic pole portions disposed circumferentially along their core in accordance with a coil connection specification, wherein

the coil winding steps for the magnetic pole portions include a jumper-wire disposing step of disposing, between one and another magnetic pole portions, wires integral with the wound coils, as jumper wires, between coil winding processes for the respective magnetic pole portions, the method of manufacturing the rotating electric machine stator further comprising:

a preparing step of preparing connecting members for electrically connecting between the jumper wires placed at different positions, wherein each of the connecting members includes a plurality of conductive coil-connecting terminals having the open-figured ports made of conductors that are opened in one direction, and a conductive connection member for electrically connecting between the plurality of conductive coil-connecting terminals; and

the plurality of conductive coil-connecting terminals each include, in addition to the open-figured ports, connection parts made of conductors connected to the conductive connection member, and extension conductor portions that connect between the open-figured ports and the connection parts, and

a jumper-wire interconnecting step conducted after the coil winding steps, in which the connecting members are placed so that the connection parts are nearer to a radially inner side of the core than the open-figured ports facing an end-face of the core in accordance with the coil connection specification, and the jumper wires are passed through the open-figured ports and then fixed thereon for causing electrical connection, whereby the plurality of jumper wires are electrically connected to each other by way of the connecting members.

7. The method of manufacturing a rotating electric machine stator as set forth in claim 5, wherein each of the connection parts is curved to have an open-figured port, and the conductive connection member is inserted and fixed into the open-figured port of at least one of the connection parts.

6. A rotating electric machine stator comprising:

a core having a plurality of magnetic pole portions;

coils wound around the respective plurality of magnetic pole portions;

jumper wires for electrically interconnecting the coils adjacent to each other by way of wires integral with the adjacent coils; and

connecting members for electrically connecting between the jumper wires placed at different positions, wherein

the connecting members each include a plurality of open-figured ports made of conductors that are opened toward an end-face of the core, and an interconnection conductor that is a conductor for interconnecting the plurality of open-figured ports; and

the jumper wires are inserted and fixed in the open-figured ports being directed toward the end-face of the core, to electrically connect the wires to the open-figured ports;

and wherein the magnetic pole portions are attached thereon with respective coil bobbins each being a dielectric member;

the coils wound around the magnetic pole portions are those wound by means of the coil bobbins;

the coil bobbins attached on the magnetic pole portions each include, at around a circumference portion of the stator that corresponds to each of the magnetic pole portions, a first guide groove for guiding a coil'"'"'s winding-start lead wire that is a jumper wire from an adjacent magnetic pole portion, a second guide groove for guiding a coil'"'"'s winding-end lead wire that is a jumper wire to an adjacent magnetic pole portion, and a pass-through hole provided between the first guide groove and the second guide groove; and

the coil'"'"'s winding-start lead wire and the coil'"'"'s winding-end lead wire wound for each of the magnetic pole portions run through the pass-through hole, and are guided into the first guide groove and out of the second guide groove, respectively.