Stator and motor

Patent metadata

Field	Value
Publication number	US-12348089-B2
Application number	US-202017762705-A
Country	US
Kind code	B2
Filing date	Sep 1, 2020
Priority date	Sep 30, 2019
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions disposed across the teeth, a first pin and a second pin each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. Each of the working portions of the second pin and the third pin is disposed in one of an outermost stage and an innermost stage of the slot. A number of teeth straddled by the second pin is smaller than a number of teeth straddled by the first pin.

First claim

The invention claimed is:

1. A stator used in a motor, the stator comprising:
a stator core including an annular core back centered on a center axis and a plurality of teeth extending from the core back toward a radial inside;
a plurality of pins including a conductive working portion extending in an axial direction in a slot between the teeth; and
a plurality of bus bars electrically connected to the plurality of pins,
wherein in each of the slots, the working portions are disposed over a plurality of stages in a radial direction,
the plurality of pins include
a first pin including the two working portions disposed across the teeth,
a second pin including the two working portions disposed across the teeth, and
a third pin that includes the one working portion and is connected to the bus bar,
each of the first pin and the second pin includes
a crossing portion connecting the two working portions in a circumferential direction on one side in the axial direction, and
a connection portion connected to another pin on the other side in the axial direction of the working portion,
in the first pin, the two working portions are inserted into an identical stage or stages adjacent to each other in the radial direction,
each of the working portion of the second pin and the working portion of the third pin is disposed in one of an outermost stage and an innermost stage of the slot, and
a number of the teeth straddled by the second pin is smaller than a number of the teeth straddled by the first pin.

2. The stator according to claim 1 , wherein
the number of the teeth straddled by the two working portions included in the first pin is a number obtained by dividing the number of the teeth by the number of poles of the stator.

3. The stator according to claim 1 , wherein
the number of the teeth straddled by the two working portions included in the second pin is smaller by one than the number of the teeth straddled by the two working portions included in the first pin.

4. The stator according to claim 1 , wherein each of the third pins includes
a first connection portion electrically connected to the bus bar on the one side in the axial direction of the working portion, and
a second connection portion connected to another pin on the other side in the axial direction of the working portion.

5. The stator according to claim 1 , wherein
the number of the third pins is six.

6. The stator according to claim 1 , wherein
each of the bus bars includes
a power supply connection portion extending in the radial direction, an end on a radial outside of the power supply connection portion being directly or indirectly connected to a power supply device,
an arcuate portion extending in the circumferential direction from an end on a radial inside of the power supply connection portion, and
a pin connection portion that extends in the axial direction from the arcuate portion and is electrically connected to the third pin.

7. The stator according to claim 6 , wherein
the plurality of bus bars are disposed within a range of 90° in the circumferential direction.

8. A motor comprising:
the stator according to claim 1 ; and
a rotor that is disposed on the radial inside of the stator core and supported so as to be rotatably about the center axis.

Assignees

• Nidec Corp

Inventors

• Takada Hibiki
• Ueda Tomoya
• Hiwa Takahiro

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K15/066

  inserted perpendicularly to the axis of the slots or inter-polar channels · CPC title

• H02K3/28 Primary

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K3/12 Primary

  arranged in slots · CPC title