# US 2021/0344254 A1 · Motor structure

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- Number: US 2021/0344254 A1
- Document ID: US20210344254A1
- Status: Published application
- Kind: A1
- Application number: 17/237,020
- Filed: 2021-04-21
- Published: 2021-11-04
- Earliest claimed: 2020-04-30
- Assignees: Techway Industrial Co., Ltd.
- Applicants: Techway Industrial Co.,Ltd.
- Inventors: FU-HSIANG CHUNG; SHIH-WEI HUNG; YU-CHIN LIN; WEI-LIN HSU
- Web page: https://patentgrep.com/patent/US20210344254A1

## CPC

- H02K 9/223: {Heat bridges}
- H02K 1/146: {consisting of a generally annular yoke with salient poles}
- H02K 5/15: Mounting arrangements for bearing-shields or end plates
- H02K 11/25: Devices for sensing temperature, or actuated thereby
- H02K 21/16: having annular armature cores with salient poles (with homopolar co-operation H02K21/20)
- H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A motor structure includes a housing, a stator winding and at least one thermal conductive pad. The housing includes an internal space. The stator winding is received in the internal space. The at least one thermal conductive pad is abutted against the stator winding. The heat of the stator winding can be transmitted by the at least one thermal conductive pad.

## Claims

### Claim 1

A motor structure, comprising:
a housing, comprising an internal space;
a stator winding received in the internal space; and
at least one thermal conductive pad abutted against the stator winding.

### Claim 2 (depends on 1)

The motor structure of claim 1, further comprising:
a stator located within the internal space; and
a winding seat disposed at one end of the stator and comprising:
an annular frame; and
at least one winding post protruding radially and inwardly from the annular frame;
wherein at least one wire of the stator winding is wound around the at least one winding post and the stator, and the at least one thermal conductive pad is abutted against the at least one wire.

### Claim 3 (depends on 2)

The motor structure of claim 2, further comprising:
an end cap connected to one end of the housing;
wherein the at least one thermal conductive pad is located between the stator winding and the end cap.

### Claim 4 (depends on 3)

The motor structure of claim 3, wherein a number of the at least one thermal conductive pad is one and the thermal conductive pad is ring-shaped.

### Claim 5 (depends on 4)

The motor structure of claim 4, wherein the annular frame has an outer radius, the thermal conductive pad has an outer radius, and the outer radius of the annular frame is larger than the outer radius of the thermal conductive pad.

### Claim 6 (depends on 5)

The motor structure of claim 5, wherein the annular frame has an inner radius, and the inner radius of the annular frame is smaller than the outer radius of the thermal conductive pad.

### Claim 7 (depends on 4)

The motor structure of claim 4, wherein the end cap comprises an annular groove facing toward the stator winding, and the thermal conductive pad is restricted by the annular groove.

### Claim 8 (depends on 1)

The motor structure of claim 1, further comprising:
at least one thermal conductive sheet abutted against the at least one thermal conductive pad.

### Claim 9 (depends on 8)

The motor structure of claim 8, further comprising:
a stator located within the internal space; and
a winding seat disposed at one end of the stator and comprising:
an annular frame; and
at least one winding post protruding radially and inwardly from the annular frame;
wherein at least one wire of the stator winding is wound around the at least one winding post and the stator, and the at least one thermal conductive pad is abutted against the at least one wire.

### Claim 10 (depends on 9)

The motor structure of claim 9, wherein a material of the at least one thermal conductive sheet is metal.

### Claim 11 (depends on 9)

The motor structure of claim 9, further comprising:
an end cap connected to one end of the housing, wherein a receiving space is formed between the end cap and the at least one thermal conductive sheet.

### Claim 12 (depends on 9)

The motor structure of claim 9, wherein the at least one thermal conductive sheet comprises:
a thermal conductive sheet body; and
at least one pressing portion protruding radially and inwardly from the thermal conductive sheet body, the at least one pressing portion configured to press the at least one thermal conductive pad.

### Claim 13 (depends on 12)

The motor structure of claim 12, wherein the at least one pressing portion is correspondent to the at least one winding post, and a number of the at least one pressing portion is correspondent to a number of the at least one winding post.

### Claim 14 (depends on 12)

The motor structure of claim 12, wherein the at least one thermal conductive sheet further comprises at least one engaging portion disposed on the thermal conductive sheet body, the winding seat further comprises at least one engaging projection, and the at least one engaging portion is correspondent to the at least one engaging projection.

### Claim 15 (depends on 8)

The motor structure of claim 8, further comprising:
at least one thermal sensor connected to the at least one thermal conductive sheet.

### Claim 16 (depends on 1)

The motor structure of claim 1, wherein the at least one thermal conductive pad has a thermal conductivity ranged from 1.5 W/m·K to 17 W/m·K.