Stator winding heat sink configuration

Patent metadata

Field	Value
Publication number	US-9748809-B2
Application number	US-201414187011-A
Country	US
Kind code	B2
Filing date	Feb 21, 2014
Priority date	Sep 23, 2008
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

In one possible implementation, a motor is provided including a rotor and a stator. Front cooling fins are thermally coupled to a front of the stator, and rear cooling fins are thermally coupled to a rear portion of the stator. The winding is between the front and rear cooling fins.

First claim

What is claimed is:

1. A motor comprising:
a) a rotor; and
b) a stator comprising:
i) front cooling fins thermally coupled to a front of the stator;
ii) rear cooling fins thermally coupled to a rear portion of the stator;
iii) a winding between the front and rear cooling fins;
iv) a front stator yoke mounted onto a front distal end of the winding, the front cooling fins being mounted to the front stator yoke; and
v) wherein the stator comprises a generally circular configuration disposed about a central axis defining the generally circular configuration, and wherein the front of the stator is spaced apart from the rear portion of the stator along the central axis.

2. The motor of claim 1 , wherein the front stator yoke is mounted to a front end of the winding and surrounds three sides of the front end of the winding.

3. The motor of claim 2 , wherein the front cooling fins are mounted to a front side of the front stator yoke.

4. The motor of claim 3 , wherein the front cooling fins have a solid front annular face, the front cooling fins being oriented radially and extending laterally between the front annular face and the front stator yoke.

5. The motor of claim 4 , wherein the stator comprises a rear stator yoke, and wherein the rear cooling fins are mounted to the rear stator yoke.

6. The motor of claim 1 , wherein the stator comprises a rear stator yoke, and wherein the rear cooling fins are mounted to the rear stator yoke.

7. The motor of claim 6 , wherein the rear stator yoke is mounted to a rear end of the winding and surrounds three sides of the rear end of the winding.

8. The motor of claim 7 , wherein the rear cooling fins are mounted to an outer surface of the rear stator yoke.

9. The motor of claim 1 , wherein the front cooling fins have an outer radius and an inner radius, the outer radius of the front cooling fins being about a same outer radius as the winding.

10. The motor of claim 9 , wherein the rotor comprises an outer rotor, and wherein the rear cooling fins have an outer radius and an inner radius, the inner radius of the rear cooling fins being about at a same radius as an outer radius of the outer rotor.

11. The motor of claim 1 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins are housed within the spinner.

12. A motor comprising:
a) an inner and outer rotor connected together; and
b) a stator between the inner and outer rotors, the stator comprising:
i) a winding comprising conductors encased in a thermally conductive material;
ii) a thermally conductive front yoke mounted to a front end of the winding;
iii) front cooling fins mounted to the front yoke;
iv) a thermally conductive rear yoke mounted to a rear distal end of the winding;
v) rear cooling fins mounted to the rear yoke; and
vi) wherein the stator comprises a generally circular configuration disposed about a central axis defining the generally circular configuration, and wherein the front end of the winding is spaced apart from the rear distal end of the winding along the central axis.

13. The motor of claim 12 , wherein the rear cooling fins are mounted to an outer surface of the rear yoke.

14. The motor of claim 13 , wherein the front yoke surrounds three sides of the front end of the winding, and wherein the rear yoke surrounds three sides of the rear end of the winding.

15. An aircraft motor comprising:
a) an inner and outer rotor connected together; and
b) a stator between the inner and outer rotors, the stator comprising:
i) a winding comprising conductors encased in a thermally conductive material;
ii) a thermally conductive front yoke mounted to a front distal end of the winding;
iii) front cooling fins mounted to the front yoke, the front cooling fins have a solid front annular face, the front cooling fins being oriented radially and extending laterally between the front annular face and the front stator yoke;
iv) a thermally conductive rear yoke mounted to a back distal end of the winding;
v) rear cooling fins mounted to the rear yoke the rear cooling fins have a solid outer annular face, the rear cooling fins oriented radially and extend radially between the rear stator yoke and the outer annular face; and
vi) wherein the stator comprises a generally circular configuration disposed about a central axis defining the generally circular configuration, and wherein the front distal end of the winding is spaced apart from the back distal end of the winding along the central axis.

16. The motor of claim 15 , wherein the front cooling fins have an outer radius and an inner radius, the outer radius of the front cooling fins being about a same outer radius as the winding.

17. The motor of claim 16 , wherein the rear cooling fins have an inner radius, the inner radius of the rear cooling fins being about at a same radius as an outer radius of the outer rotor.

18. The motor of claim 15 , wherein the rear cooling fins have an inner radius, the inner radius of the rear cooling fins being about at a same radius as an outer radius of the outer rotor.

19. The motor of claim 15 , further comprising a spinner, and wherein the front cooling fins are housed within the spinner.

Assignees

• Aerovironment Inc

Inventors

• Daboussi Zaher Abdallah
• Sheppard Lindsay Aspinwall
• Hibbs Bart Dean
• Rippel Wally Ewald

Classifications

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• H02K3/32

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

• H02K9/06

  with fans or impellers driven by the machine shaft · CPC title

• H02K3/14 Primary

  with transposed conductors, e.g. twisted conductors · CPC title

• H02K9/14

  wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle · CPC title