Synchronous reluctance electric machine

Patent metadata

Field	Value
Publication number	US-10116174-B2
Application number	US-201615145916-A
Country	US
Kind code	B2
Filing date	May 4, 2016
Priority date	Feb 5, 2016
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A synchronous reluctance electric machine is described, and includes a stator including a plurality of electrical windings and a rotor disposed in a cylindrically-shaped void formed within the stator. The rotor includes a plurality of steel laminations assembled onto a shaft, wherein the shaft defines a longitudinal axis. Each of the steel laminations includes a plurality of poles and each of the poles includes a plurality of slots disposed near an outer periphery. The slots of the steel laminations are longitudinally aligned. A plurality of packets assembled from anisotropic material are disposed in the slots.

First claim

The invention claimed is:

1. A synchronous reluctance electric machine, comprising:
a stator including a plurality of electrical windings;
a rotor disposed in a cylindrically-shaped void formed within the stator and including a plurality of steel laminations assembled onto a shaft,
wherein the shaft defines a longitudinal axis,
wherein each of the steel laminations includes a plurality of poles and wherein each of the poles includes a plurality of slots disposed near an outer periphery, and
wherein the slots of the steel laminations are longitudinally aligned; and

a plurality of packets assembled from anisotropic material and disposed in the slots, wherein each of the packets assembled from anisotropic material comprises a stack including a plurality of laminations fabricated from a grain-oriented steel material, wherein the grain-oriented steel material of the plurality of laminations are aligned along a common axis.

2. The synchronous reluctance electric machine of claim 1 , wherein the plurality of packets assembled from anisotropic material are disposed in the slots in an axial orientation relative to the longitudinal axis.

3. The synchronous reluctance electric machine of claim 1 , wherein the common axis associated with the grain-oriented steel materials of the plurality of laminations is parallel with a d-axis associated with one of the poles of the rotor.

4. The synchronous reluctance electric machine of claim 1 , wherein the common axis associated with the grain-oriented steel materials of the plurality of laminations is aligned with an axis of low magnetic reluctance associated with one of the poles of the rotor.

5. The synchronous reluctance electric machine of claim 1 , wherein the plurality of laminations fabricated from a grain-oriented steel material are layered radially.

6. The synchronous reluctance electric machine of claim 1 , wherein the plurality of laminations fabricated from a grain-oriented steel material are layered axially.

7. The synchronous reluctance electric machine of claim 1 , wherein the grain-oriented steel material comprises an iron-silicon magnetic alloy.

8. The synchronous reluctance electric machine of claim 1 , wherein each of the steel laminations comprises a disc-shaped steel lamination.

9. The synchronous reluctance electric machine of claim 8 , wherein each of the disc-shaped steel laminations are fabricated from an isotropic material.

10. A rotor for a synchronous reluctance electric machine, the rotor comprising:
a plurality of steel laminations assembled onto a shaft, wherein the shaft defines a longitudinal axis;
each of the steel laminations including a plurality of poles;
each of the poles including a plurality of slots disposed near an outer periphery, wherein the slots of the steel laminations are longitudinally aligned; and
a plurality of packets assembled from anisotropic material and disposed in the slots, wherein each of the packets assembled from anisotropic material comprises a stack including a plurality of laminations fabricated from a grain-oriented steel material, wherein the grain-oriented steel material of the plurality of laminations are aligned along a common axis.

11. The rotor of claim 10 , wherein the plurality of packets assembled from anisotropic material are disposed in the slots in an axial orientation relative to the longitudinal axis.

12. The rotor of claim 10 , wherein the common axis associated with the grain-oriented steel materials of the plurality of laminations is parallel with a d-axis associated with one of the poles of the rotor.

13. The rotor of claim 10 , wherein the common axis associated with the grain-oriented steel materials of the plurality of laminations is aligned with an axis of low magnetic reluctance associated with one of the poles of the rotor.

14. The rotor of claim 10 , wherein the plurality of laminations fabricated from a grain-oriented steel material are layered radially.

15. The rotor of claim 10 , wherein the plurality of laminations fabricated from a grain-oriented steel material are layered axially.

16. The rotor of claim 10 , wherein the grain-oriented steel material comprises an iron-silicon magnetic alloy.

17. The rotor of claim 10 , wherein each of the steel laminations comprises a disc-shaped steel lamination.

18. The rotor of claim 17 , wherein each of the disc-shaped steel laminations are fabricated from an isotropic material.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Stancu Constantin C
• Savagian Peter J
• Rahman Khwaja M
• Patel Nitinkumar R
• Dawsey Robert T

Classifications

• H02K1/246

  Variable reluctance rotors · CPC title

• H02K1/02 Primary

  characterised by the magnetic material · CPC title

• H02K21/02

  Details · CPC title

• H02K19/02

  Synchronous motors · CPC title

• H02K1/22 Primary

  Rotating parts of the magnetic circuit · CPC title