Sleeve rotor synchronous reluctance electric machine

Patent metadata

Field	Value
Publication number	US-10439456-B2
Application number	US-201615367261-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Apr 25, 2016
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

According to various embodiments, a synchronous reluctance machine is disclosed. The synchronous reluctance machine includes a stator, a synchronous reluctance rotor disposed within the stator and configured to rotate relative to the stator, and a non-magnetic sleeve disposed circumferentially around the rotor, where sleeve thickness is between about 1 mm and 2 mm and an air-gap radius is between about 80 mm and 100 mm.

First claim

What is claimed is:

1. A synchronous reluctance machine, comprising:
a stator;
a synchronous reluctance rotor disposed within the stator and configured to rotate relative to the stator; and
a non-magnetic sleeve disposed circumferentially around the rotor, wherein sleeve thickness is between about 1 mm and 2 mm and an air-gap radius is between about 80 mm and 100 mm.

2. The synchronous reluctance machine of claim 1 , wherein the sleeve comprises carbon fiber or Inconel.

3. The synchronous reluctance machine of claim 1 , wherein an intermediate layer of fibers of the sleeve is arranged in an axial direction for every nine layers arranged in a circumferential direction.

4. The synchronous reluctance machine of claim 1 , wherein the machine is configured to provide maximum power at a top speed of about 14,000 rpm.

5. The synchronous reluctance machine of claim 1 , wherein the rotor further comprises rounded corners for each bridge.

6. The synchronous reluctance machine of claim 1 , wherein the rotor further comprises a plurality of non-conductive wedges disposed in an outer center section of each rotor pole.

7. A traction motor comprising:
a stator;
a synchronous reluctance rotor disposed within the stator and configured to rotate relative to the stator; and
a non-magnetic sleeve retained circumferentially around the rotor, wherein sleeve thickness is between about 1 mm and 2 mm and an air-gap radius is between about 80 mm and 100 mm.

8. The traction motor of claim 7 , wherein the sleeve comprises carbon fiber or Inconel.

9. The traction motor of claim 7 , wherein an intermediate layer of fibers of the sleeve is arranged in an axial direction for every nine layers arranged in a circumferential direction.

10. The traction motor of claim 7 , wherein the traction motor is configured to provide maximum power at a top speed of about 14,000 rpm.

11. The traction motor of claim 7 , wherein the rotor further comprises rounded corners for each bridge.

12. The traction motor of claim 7 , wherein the rotor further comprises a plurality of non-conductive wedges disposed in an outer center section of each rotor pole.

13. A synchronous reluctance machine, comprising:
a stator;
a rotor disposed within the stator and configured to rotate relative to the stator; and
a sleeve disposed circumferentially around the rotor, the sleeve comprising a plurality of layers of fibers arranged such that an intermediate layer of fibers is arranged in an axial direction for every one or more layers of fibers arranged in a circumferential direction.

14. The synchronous reluctance machine of claim 13 , wherein the intermediate layer of fibers is arranged in an axial direction for every nine layers of fibers arranged in a circumferential direction.

15. The synchronous reluctance machine of claim 13 , wherein the sleeve comprises carbon fiber or Inconel.

16. The synchronous reluctance machine of claim 13 , wherein the machine is configured to provide maximum power at a top speed of about 14,000 rpm.

17. The synchronous reluctance machine of claim 13 , wherein an air-gap radius is between about 80 mm and 100 mm.

18. The synchronous reluctance machine of claim 13 , wherein sleeve thickness is between about 1 mm and 2 mm.

19. The synchronous reluctance machine of claim 13 , wherein the rotor further comprises rounded corners for each bridge.

20. The synchronous reluctance machine of claim 13 , wherein the rotor further comprises a plurality of non-conductive wedges disposed in an outer center section of each rotor pole.

Assignees

• Gen Electric

Inventors

• Reddy Patel Bhageerath
• Grace Kevin Michael

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K3/18

  Windings for salient poles · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• H02K2201/03

  Machines characterised by aspects of the air-gap between rotor and stator · CPC title

• H02K19/103

  Motors having windings on the stator and a variable reluctance soft-iron rotor without windings · CPC title