Motor having a noise filter

Patent metadata

Field	Value
Publication number	US-9893599-B2
Application number	US-201414567053-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 11, 2013
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A motor may include a housing, a motor assembly accommodated in the housing, and a mold cover having an outer circumferential surface. The outer circumferential surface may be coupled to the housing, which has electrical conductivity. A noise filter is provided in the mold cover. A ground terminal of the noise filter is electrically connected to the outer circumferential surface of the mold cover.

First claim

What is claimed is:

1. A motor, comprising;
a housing;
a motor assembly provided in the housing;
a mold cover having an outer circumferential surface coupled to the housing;
a noise filter provided in the mold cover and including a ground terminal;
a conductive layer disposed on the outer circumferential surface of the mold cover;
a contact pin connecting the ground terminal of the noise filter and the conductive layer; and
a conductive tape by which the contact pin is attached to the conductive layer,
wherein a thickness of the conductive layer is less than a thickness of the conductive tape.

2. The motor of claim 1 , wherein the conductive layer is extended to a rear surface of the mold cover.

3. The motor of claim 1 , further comprising a solder portion electrically connecting the ground terminal of the noise filter to the contact pin.

4. The motor of claim 1 , wherein the sum of thicknesses of the contact pin, the conductive layer, and the conductive tape is 100 μm or less.

5. The motor of claim 1 , wherein the noise filter comprises a first electric storage unit connected to the ground terminal.

6. The motor of claim 5 , wherein the first electric storage unit comprises a first capacitor module connected to a first inductor and a second capacitor module connected to a second inductor.

7. The motor of claim 1 , wherein the motor assembly comprises a stator accommodated in the housing; a rotor; a commutator coupled to the rotor; and a rotational shaft which is rotated integrally with the rotor.

8. The motor of claim 1 , wherein the housing comprises a ground inner circumferential surface which is in contact with the mold cover, and
the ground inner circumferential surface has electrical conductivity.

9. The motor of claim 8 , wherein the housing comprises a conductive layer attached to the ground inner circumferential surface.

10. A motor, comprising;
a housing;
a motor assembly provided in the housing;
a mold cover coupled to the housing; and
a noise filter provided in the mold cover and including a ground terminal;
a conductive layer disposed on the outer circumferential surface of the mold cover;
a contact pin connecting the ground terminal of the noise filter and the conductive layer; and
a conductive tape by which the contact pin is attached to the conductive layer,
wherein the housing includes a ground inner circumferential surface which is electrically coupled to a ground terminal of the noise filter,
wherein the sum of thicknesses of the contact pin, the conductive layer, and the conductive tape is 100 μm or less.

11. The motor of claim 10 , wherein an area of the ground inner circumferential surface corresponds to an area of an outer circumferential surface of the mold cover.

12. The motor of claim 10 , wherein the conductive layer is extended to a rear surface of the mold cover.

13. The motor of claim 10 , wherein the conductive layer has a thickness which is less than that of the conductive tape.

Assignees

• Lg Innotek Co Ltd

Inventors

• Yeo Jae Young

Classifications

• H02K5/15 Primary

  Mounting arrangements for bearing-shields or end plates · CPC title

• H02K11/40

  Structural association with grounding devices · CPC title

• H02K11/028

  Suppressors associated with the rotor · CPC title

• H02K11/024

  Electricity · mapped topic

• H02K11/026 Primary

  Suppressors associated with brushes, brush holders or their supports · CPC title