Rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9825509-B2
Application number	US-201314389276-A
Country	US
Kind code	B2
Filing date	Mar 18, 2013
Priority date	Mar 30, 2012
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A rotating electrical machine is provided with: a plurality of bus bars that provide an electrical relay between an external power line, which is positioned on the outside of a housing, and a multiphase coil; an insulation cover that is mounted on the plurality of bus bars with a prescribed gap between each, and covers at least part of the bottom surface of each bus bar; and a coolant supply means that supplies a cooling fluid, which cools a stator, inside the housing. A through-hole, which vertically penetrates a bottom surface, is formed on the bottom surface of the insulation cover.

First claim

The invention claimed is:

1. A rotary electric machine comprising:
a stator with coils in a plurality of phases wound thereon;
a housing that houses the stator therein;
a plurality of bus bars configured to electrically join the coils in the plurality of phases and external electric power lines to each other, the external electric power lines disposed outside of the housing;
an insulating cover attached to the bus bars with gaps between the bus bars and the insulating cover, and configured to cover at least portions of lower surfaces of the bus bars; and
a coolant supply unit configured to supply a cooling fluid for cooling the stator to the inside of the housing,
wherein a through hole is defined in a bottom surface of the insulating cover and extends vertically through the bottom surface, and
wherein the through hole is disposed at a position remote from an outer circumferential surface of the stator in an axial direction of the rotary machine.

2. The rotary electric machine according to claim 1 , wherein the bus bars extend from an outer circumferential side of the stator along the axial direction, and
the insulating cover is disposed between the outer circumferential surface of the stator and the bus bars.

3. The rotary electric machine according to claim 1 , wherein the insulating cover includes a partition wall positioned between the bus bars,
the bottom surface of the insulating cover is inclined with respect to a horizontal plane, and
the through hole is positioned at a corner where the partition wall and the bottom surface cross each other.

4. The rotary electric machine according to claim 1 , wherein the bus bars are formed of plate-like members, and
each of the bus bars includes a bent portion, which is made up of a portion of the plate-like member that is bent in a direction along thickness of the plate-like member.

5. The rotary electric machine according to claim 1 , wherein one of the bus bars includes a stepped portion, which is formed in a height direction, and
the through holes of the insulating cover are formed on upper and lower sides of the stepped portion.

6. The rotary electric machine according to claim 1 , wherein the insulating cover comprises a lower cover that covers the lower surfaces of the bus bars, and
the insulating cover is coupled to an upper cover that covers upper surfaces of the bus bars.

7. The rotary electric machine according to claim 1 , wherein the bus bars extend from an outer circumferential side of the stator inward or outward with respect to the axial direction, and
the insulating cover is disposed between the outer circumferential surface of the stator and the bus bars.

8. A rotary electric machine comprising:
a stator with coils in a plurality of phases wound thereon;
a housing that houses the stator therein;
a plurality of bus bars configured to electrically join the coils in the plurality of phases and external electric power lines to each other, the external electric power lines disposed outside of the housing;
an insulating cover attached to the bus bars with gaps between the bus bars and the insulating cover, and configured to cover at least portions of lower surfaces of the bus bars; and
a coolant supply unit configured to supply a cooling fluid for cooling the stator to the inside of the housing,
wherein a through hole is defined in a bottom surface of the insulating cover and extends vertically through the bottom surface,
wherein one of the bus bars includes a stepped portion, which is formed in a height direction, and
the through hole of the insulating cover includes an upper through hole disposed on the upper side of the stepped portion and a lower through hole disposed on the lower side of the stepped portion.

9. The rotary electric machine according to claim 8 , wherein the bus bars extend from an outer circumferential side of the stator along an axial direction of the rotary electric machine, and
the insulating cover is disposed between an outer circumferential surface of the stator and the bus bars.

10. The rotary electric machine according to claim 8 , wherein the insulating cover includes a partition wall positioned between the bus bars,
the bottom surface of the insulating cover is inclined with respect to a horizontal plane, and
the through hole is positioned at a corner where the partition wall and the bottom surface cross each other.

11. The rotary electric machine according to claim 8 , wherein the bus bars are formed of plate-like members, and
each of the bus bars includes a bent portion, which is made up of a portion of the plate-like member that is bent in a direction along thickness of the plate-like member.

12. The rotary electric machine according to claim 8 , wherein the insulating cover comprises a lower cover that covers the lower surfaces of the bus bars, and
the insulating cover is coupled to an upper cover that covers upper surfaces of the bus bars.

13. A rotary electric machine comprising:
a stator with coils in a plurality of phases wound thereon;
a housing that houses the stator therein;
a plurality of bus bars configured to electrically join the coils in the plurality of phases and external electric power lines to each other, the external electric power lines disposed outside of the housing;
an insulating cover attached to the bus bars with gaps between the bus bars and the insulating cover, and configured to cover at least portions of lower surfaces of the bus bars; and
a coolant supply unit configured to supply a cooling fluid for cooling the stator to the inside of the housing,
wherein a through hole is defined in a bottom surface of the insulating cover and extends vertically through the bottom surface,
wherein the insulating cover includes a partition wall positioned between the bus bars,
the bottom surface of the insulating cover is inclined along a direction which intersects an extending direction of the partition wall extending along the bus bars, the bottom surface being inclined with respect to a horizontal plane, and
the through hole is positioned at a corner where the partition wall and the bottom surface cross each other, the corner being located on the upper side of the partition wall.

Assignees

• Honda Motor Co Ltd

Inventors

• Nagumo Toshiyuki

Classifications

• H02K9/19

  for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil · CPC title

• H02K3/52

  Fastening salient pole windings or connections thereto · CPC title

• H02K11/27 Primary

  Devices for sensing current, or actuated thereby (overcurrent protection responsive to temperature of the machines or parts thereof, e.g. windings, H02K11/25) · CPC title

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K3/522

  for generally annular cores with salient poles · CPC title