Stator of motor having insulation structure for separation of stator winding groups

Patent metadata

Field	Value
Publication number	US-9748812-B2
Application number	US-201615165771-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	Aug 16, 2011
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

Disclosed is a stator of an EPS motor, the stator including a stator core including a plurality of teeth protrusively formed toward a center of an inner circumferential surface, a plurality of coils wound on the teeth at a predetermined counts, an insulator coupled to an upper surface and a bottom surface of the stator core to insulate the coil from the stator core, and an insulation tube situated nearest to a coil wound on an adjacent stator core and inserted into a coil wound on an outmost side of the teeth.

First claim

What is claimed is:

1. A stator of a motor, the stator comprising:
a stator core including a first tooth and a second tooth spaced from the first tooth;
a coil unit including a first coil wound on the first tooth and a second coil wound on the second tooth, wherein the first coil comprises a body portion wound on the first tooth and a lead portion extended from the body portion and wherein the lead portion is not wound on the first tooth so that the lead portion is not overlapped with the first tooth in a vertical longitudinal direction of the first tooth; and
an insulation tube accommodating at least a portion of an outermost strand of the body portion of the first coil to insulate the body portion of the first coil from the second coil:
wherein all portions of the insulation tube are overlapped with the body portion of the first coil in the vertical longitudinal direction of the first tooth, and
wherein the insulation tube has a length corresponding to a length of the outermost strand of the body portion of the first coil.

2. The stator of claim 1 , wherein the insulation tube has a thickness smaller than a gap between the first coil and the second coil.

3. The stator of claim 1 , wherein the insulation tube has a length corresponding to a length of the outermost strand of the body portion of the first coil.

4. The stator of claim 1 , wherein the insulation tube is provided with a synthetic resin material.

5. The stator of claim 1 , wherein the insulation tube has an inner diameter corresponding with a diameter of the outermost strand of the body portion of the first coil.

6. The stator of claim 1 , wherein the stator core further includes a first spilt core formed with the first tooth and a second spilt core formed with the second tooth,
wherein the first spilt core includes a body coupled to the second spilt core, and
wherein the first tooth is inwardly protruded from the body.

7. The stator of claim 1 , further comprising:
an insulator coupled to the stator core to insulate the coil from the stator core.

8. The stator of claim 7 , wherein the insulator includes an upper insulation portion coupled to an upper portion of the stator core and a lower insulation portion coupled to a lower portion of the stator core.

9. The stator of claim 1 , wherein the insulation tube accommodates only one strand of the first coil.

10. The stator of claim 1 , wherein the insulation tube is not disposed on the lead portion of the first coil.

11. A motor, the motor comprising:
a stator core including a first tooth and a second tooth spaced from the first tooth;
a coil unit including a first coil wound on the first tooth and a second coil wound on the second tooth, wherein the first coil comprises a body portion wound on the first tooth and a lead portion extended from the body portion. and wherein the lead portion is not wound on the first tooth so that the lead portion is not overlapped with the first tooth in a vertical longitudinal direction of the first tooth; and
an insulation tube accommodating at least a portion of an outermost strand of the body portion of the first coil to insulate the body portion of the first coil from the second coil:
wherein all portions of the insulation tube are overlapped with the body portion of the first coil in the vertical longitudinal direction of the first tooth, and
wherein the insulation tube has a length corresponding to a length of the outermost strand of the body portion of the first coil.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Hyunseop
• Kim Byungyong

Classifications

• H02K3/34 Primary

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

• H02K3/32

  Windings characterised by the shape, form or construction of the insulation · CPC title

• H02K1/14

  Stator cores with salient poles · CPC title

• H02K3/325

  for windings on salient poles, such as claw-shaped poles · CPC title

• H02K3/345

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