Rotating electric machine

Patent metadata

Field	Value
Publication number	US-12549043-B2
Application number	US-202318225268-A
Country	US
Kind code	B2
Filing date	Jul 24, 2023
Priority date	Apr 10, 2023
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

The rotating electric machine comprises: a stator core that has a first stator core portion and a second stator core portion, and an air gap portion, the first and the second stator core portions having slots and being divided in the axial direction, the air gap portion being formed between the first stator core portion and the second stator core portion by making the first stator core portion and the second stator core portion face each other in the axial direction; a plurality of coil conductors inserted into the slots; a wall portion covering the air gap portion on the inner circumference side of the air gap portion; and a coolant flow passage that sends a coolant supplied from the outer circumference side of the stator core to the air gap portion through between the plurality of coil conductors to both end surfaces of the stator core.

First claim

What is claimed is:

1 . A rotating electric machine comprising:
a stator core that has a first stator core portion and a second stator core portion, and an air gap portion, the first stator core portion and the second stator core portion having slots and being divided in the axial direction, the air gap portion being formed between the first stator core portion and the second stator core portion by making the first stator core portion and the second stator core portion face each other in the axial direction; a plurality of coil conductors that are inserted into the slots; a wall portion that covers the air gap portion on the inner circumference side of the air gap portion; and a coolant flow passage that sends a coolant supplied from the outer circumference side of the stator core to the air gap portion, through between the plurality of coil conductors to both end surfaces of the stator core, wherein
a partition that is inserted into the slot and that performs partition between the plurality of coil conductors and between the coil conductor and the stator core is provided,
the partition has a gap into which the coolant is made to flow between the partition and the coil conductor, and
the partition includes:
an annular portion that forms an annular shape and that is brought into abutment with teeth formed in the first stator core portion or the second stator core portion;
erection portions that are erected from the annular portion and that are inserted into the slots; and
the wall portion that is erected from the annular portion toward the air gap portion.

2 . The rotating electric machine according to claim 1 ,
wherein the erection portions have coil insertion portions into which the plurality of coil conductors are inserted, wherein the coil insertion portions are divided into a plurality of sections by partition walls in the radial direction, and wherein each of the coil conductors is inserted into each of the sections divided by the partition walls.

3 . The rotating electric machine according to claim 2 ,
wherein the partition is provided in each of the first stator core portion and the second stator core portion, and wherein the wall portion is configured such that the wall portion of the partition provided in the first stator core portion and the wall portion of the partition provided in the second stator core portion are brought into abutment with each other.

4 . The rotating electric machine according to claim 1 ,
wherein the partition has, in the annular portion, a coil surrounding portion that surrounds the coil conductors on the inside of the air gap portion, and has, in the connection portion of the annular portion and the coil surrounding portion, a communication path that communicates with the gap formed between the coil conductor and the partition.

5 . The rotating electric machine according to claim 1 ,
wherein the coil conductor is configured of a first coil conductor and a second coil conductor that are inserted from the end surface sides in the opposite directions with respect to the respective first stator core portion and second stator core portion, and wherein the first coil conductor and the second coil conductor are electrically connected in the air gap portion.

Assignees

• Hitachi Astemo Electric Motor Systems Ltd
• Hitachi Astemo Ltd

Inventors

• Koizumi Takayuki
• Ito Kiyoshi

Classifications

• H02K1/146 Primary

  consisting of a generally annular yoke with salient poles · CPC title

• H02K3/24

  with channels or ducts for cooling medium between the conductors · CPC title

• H02K1/20 Primary

  with channels or ducts for flow of cooling medium · CPC title

• H02K9/197

  in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator · CPC title

• H02K9/19

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