Stator winding heat sink configuration

Patent metadata

Field	Value
Publication number	US-10103592-B2
Application number	US-201715668577-A
Country	US
Kind code	B2
Filing date	Aug 3, 2017
Priority date	Sep 23, 2008
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

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) a winding; and
ii) a front stator yoke mounted onto a front 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 rear stator yoke mounted onto a rear 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 front cooling fins are separated by the winding from the rear cooling fins.

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 rear stator yoke is mounted to a rear end of the winding and surrounds three sides of the rear end of the winding.

4. The motor of claim 3 , wherein the rear cooling fins are mounted to an outer surface of the rear stator yoke.

5. The motor of claim 4 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins are housed within the spinner.

6. The motor of claim 1 , 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.

7. The motor of claim 6 , wherein the rear cooling fins are mounted to an outer surface of the rear stator yoke.

8. The motor of claim 7 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins are housed within the spinner.

9. The motor of claim 6 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins are housed within the spinner.

10. 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.

11. The motor of claim 10 , 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.

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

13. 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.

14. The motor of claim 1 , 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.

15. The motor of claim 14 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins are housed within the spinner.

16. The motor of claim 1 , wherein the front cooling fins and the front stator yoke are separated by the winding from the rear stator yoke and the rear cooling fins.

Assignees

• Aerovironment Inc

Inventors

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

Classifications

• H02K3/47

  Air-gap windings, i.e. iron-free windings · CPC title

• H02K21/12

  with stationary armatures and rotating magnets · CPC title

• H02K9/14

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

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K3/32

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