Water-cooled motor

Patent metadata

Field	Value
Publication number	US-9966818-B2
Application number	US-201514681917-A
Country	US
Kind code	B2
Filing date	Apr 8, 2015
Priority date	Jun 25, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A water-cooled motor may include a motor housing configured to be provided with a cooling water passage part in a circumferential direction and have one side surface provided with a radiation fin part, a stator configured to have a core wound with a coil along the cooling water passage part within the motor housing, and a rotor configured to have plates which each face a side of the stator and the radiation fin part and have one side provided with a turbulence generator in a direction of the radiation fin part side.

First claim

What is claimed is:

1. A water-cooled motor, comprising:
a motor housing comprising a first sidewall, a second sidewall and a circumferential wall that define an inner space of the motor, the first sidewall opposing the second sidewall, the circumferential wall interconnecting the first and second sidewalls;
a stator installed on an inner side of the circumferential wall and protruded into the inner space;
a rotor configured to rotate about a rotational axis, the rotor comprising a first plate, a second plate, and a cylindrical holder, wherein the cylindrical holder interconnects the first and second plates with a gap therebetween such that the stator is interposed between the first and second plates in the gap;
a cooling water passage integrated with the motor housing, the cooling water passage comprises a first passage section next to the first sidewall and a second passage section next to the inner side of the circumferential wall where the stator is installed,
wherein the first plate comprises at least one fin protruding toward the first sidewall and overlapping the stator when viewed along the rotational axis such that, as the rotor rotates, the at least one fin is configured to generate air turbulence inside the inner space,
wherein the first sidewall comprises an inner surface facing the at least one fin and an outer surface facing away from the inner surface, wherein the outer surface of the first sidewall is exposed to the first passage section such that cooling water in the first passage section contact the first sidewall.

2. The water-cooled motor of claim 1 , further comprising a radiation fin protruding from the first sidewall toward the first plate.

3. The water-cooled motor of claim 1 , wherein the first plate comprises two or more fins protruding toward the first sidewall.

4. The water-cooled motor of claim 1 , wherein the at least one fin is formed as any one of a radial fan type vertical to a rotation shaft of the rotor, a multi-blade fan type inclined in a rotation direction, and a turbo fan type inclined in a direction opposite to the rotation direction.

5. The water-cooled motor of claim 1 , wherein the at least one fin is formed as any one of a blade fan type having a blade shape and a limited load fan type having an ‘S’ shape.

6. The water-cooled motor of claim 1 , further comprising a discharge nozzle in fluid communication with the second passage section of the cooling water passage on a surface of the motor housing.

7. The water-cooled motor of claim 1 , comprising: an inverter housing next to the motor housing, the inverter housing comprising an inlet nozzle for introducing cooling water to first passage section of the cooling water passage.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Lee Sang Han

Classifications

• H02K5/18 Primary

  with ribs or fins for improving heat transfer · CPC title

• H02K9/22

  by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges · CPC title

• H02K9/19 Primary

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

• H02K5/20

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

• H02K9/08 Primary

  by gaseous cooling medium circulating wholly within the machine casing (H02K9/10 takes precedence) · CPC title