Stator coil, stator including said stator coil, and rotating electric machine including said stator

Patent metadata

Field	Value
Publication number	US-10666109-B2
Application number	US-201615755010-A
Country	US
Kind code	B2
Filing date	Jul 27, 2016
Priority date	Sep 2, 2015
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

The coil ends in a rotating electric machine are to be made smaller in size. A stator coil 60 inserted into a slot 420 in a stator of a rotating electric machine is formed with segment coils 28 connected to one another. In the stator coil 60 , the segment coils 28 each include an insulating coated portion coated with an insulating coating, and a slit 900 or a recess is formed in the insulating coated portion of each of the segment coils 28 at a coil end 140 . The slit 900 or the recess is preferably formed between a diagonal conductor portion 28 D and a conductor-end straight portion 28 E of each segment coil 28.

First claim

The invention claimed is:

1. A stator coil inserted into a slot in a stator of a rotating electric machine,
the stator coil being formed with a plurality of segment coils, the segment coils being connected to one another,
wherein
the segment coils each include an insulating coated portion coated with an insulating coating,
the segment coils each include an uncoated portion that is not coated with the insulating coating, and
one of a slit and a recess is formed in the insulating coating of the insulating coated portion of each segment coil at a coil end.

2. The stator coil according to claim 1 , wherein the one of the slit and the recess is formed between a diagonal conductor portion and a conductor-end straight portion of each segment coil.

3. The stator coil according to claim 2 , wherein the one of the slit and the recess is formed in a face of each segment coil on an end portion side in an axial direction.

4. The stator coil according to claim 3 , wherein each segment coil is rectangular in cross-section.

5. The stator coil according to claim 4 , wherein T 2 <T 1 ,
where T 1 represents a depth of the slit, and T 2 represents a thickness of the insulating coating.

6. A stator comprising:
the stator coil according to claim 1 ; and
a stator core including a slot into which the stator coil is inserted.

7. A rotating electric machine comprising:
the stator according to claim 6 ; and
a rotor facing the stator via a void.

8. The stator coil according to claim 1 , wherein for each segment coil, the one of the slit or the recess is disposed in a range of 1 to 2 millimeters (mm) away from the uncoated portion.

9. The stator coil according to claim 1 , wherein the one of the slit or the recess is configured to engage with a hook portion.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Nakayama Kenichi
• Fukuda Tomohiro
• Genmoto Takashi
• Okamoto Hiromitsu
• Mirumachi Mitsuaki
• Matsunobu Yutaka

Classifications

• H02K3/34 Primary

  between conductors or between conductor and core, e.g. slot insulation · CPC title

• H02K7/006

  Structural association of a motor or generator with the drive train of a motor vehicle · CPC title

• H02K9/193

  with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium · CPC title

• H02K3/38

  around winding heads, equalising connectors, or connections thereto · CPC title

• H02K15/085

  by laying conductors into slotted stators · CPC title