MOTOR POWER DISTRIBUTION APPARATUS

• US 20130069461A1
• Filed: 05/25/2011
• Published: 03/21/2013
• Est. Priority Date: 06/02/2010
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Arai, Kenji
• Granted Patent: US 9,331,539 B2
• Time in Patent Office: Days
• US Class Current: 310/71
• CPC Class Codes: H02K 15/00 Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• 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 3/38 around winding heads, equalising connectors, or connections thereto
• CPC Class Codes: H02K 3/522 for generally annular cores with salient poles
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

A motor power distribution apparatus includes first insulating holders and second insulating holders. The first insulating holders are disposed to retain every other one of a plurality of stacked power distribution members that are unified by insert molding. The second insulating holders are disposed to retain power distribution members other than the power distribution members retained by the first insulating holders.

Claims

1. A motor power distribution apparatus comprising:

first insulating holders that are disposed to retain every other one of a plurality of stacked power distribution members of a motor that are unified by insert molding; and

second insulating holders that are disposed to retain power distribution members other than the power distribution members retained by the first insulating holders.

2. The motor power distribution apparatus according to claim 1, wherein

the plurality of stacked power distribution members include three bus bars which distribute current to winding wires of a stator corresponding to each of a plurality of phases of the motor, and a neutral bus bar which connects neutral points of each of the winding wires;

the first insulating holders retain the outermost peripheral bus bar and the third from outermost peripheral bus bar in a radial direction of the stator; and

the second insulating holders retain the second from outermost peripheral bus bar and the innermost peripheral bus bar in the radial direction of the stator.

3. The motor power distribution apparatus according to claim 2, wherein

the first insulating holders and the second insulating holders respectively include three slots for retaining the power distribution members;

and

the slot at a center of the first and second insulating holders is larger in width and deeper in depth than the slots at either side of the first and second insulating holders.

4. The motor power distribution apparatus according to claim 1, wherein

the plurality of stacked power distribution members includes three bus bars which distribute current to winding wires of a stator corresponding to each of a plurality of phases of the motor;

the first insulating holders retain the outermost peripheral bus bar and the innermost peripheral bus bar in a radial direction of the stator; and

the second insulating holders retain a center bus bar disposed radially between the innermost and outermost peripheral bus bars.

5. The motor power distribution apparatus according to claim 4, wherein

the first insulating holders include three slots for retaining the power distribution members;

and

the slot at a center of the first insulating holders is greater in width and deeper in depth than the slots at either side of the first insulating holders.

6. The motor power distribution apparatus according to claim 5, wherein

the first insulating holders and the second insulating holders are disposed in generally alternating fashion without contacting one another.

7. The motor power distribution apparatus according to claim 1, further comprising

a third insulating holder for retaining an outermost peripheral bus bar and an innermost peripheral bus bar in a radial direction of the stator, without contacting a second from outermost peripheral bus bar and a third from outermost peripheral bus bar in the radial direction of the stator.

8. The motor power distribution apparatus according to claim 7, wherein

each of the first insulating holders and the second insulating holders includes a positioning portion for fixing the position with respect to the motor.

9. The motor power distribution apparatus according to claim 8, wherein

the positioning portion is fastened to a stationary die of an insert mold.

10. The motor power distribution apparatus according to claim 9, wherein

the bus bars define one of a plurality of recesses and a plurality of holes that are configured to interlock with the first insulating holders or the second insulating holders.

11. The motor power distribution apparatus according to claim 10, wherein

the plurality of power distribution members include a plurality of tabs for connection to the winding wires of each of the phases;

and

the first insulating holders and the second insulating holders are disposed in proximity to the tabs.

12. The motor power distribution apparatus according to claim 1, wherein

the first insulating holders and the second insulating holders are disposed in generally alternating fashion without contacting one another.

13. The motor power distribution apparatus according to claim 1, wherein

each of the first insulating holders and the second insulating holders includes a positioning portion for fixing the position with respect to the motor.

14. The motor power distribution apparatus according to claim 1, wherein

the bus bars define one of a plurality of recesses and a plurality of holes that are configured to interlock with the first insulating holders or the second insulating holders.

15. The motor power distribution apparatus according to claim 1, wherein

the plurality of power distribution members include a plurality of tabs for connection to the winding wires of each of the phases;

and

the first insulating holders and the second insulating holders are disposed in proximity to the tabs.

16. A method for producing a motor power distribution apparatus comprising:

positioning first insulating holders to retain every other one of a plurality of stacked power distribution members of a motor;

positioning second insulating holders to retain power distribution members other than the power distribution members retained by the first insulating holders; and

insert molding the stacked power distribution members while the stacked power distribution members are retained by the first and second insulating holders.