Rotor for an electric machine and electric machine

Patent metadata

Field	Value
Publication number	US-9252635-B2
Application number	US-201214124454-A
Country	US
Kind code	B2
Filing date	May 24, 2012
Priority date	Jun 7, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

A rotor for an electric machine includes a pole core having a coolable magnetisable rotor section which is made of a super-conducting material. The rotor section has a rotationally symmetric geometry. The pole core is formed as a cylinder and the rotor section is arranged on an outer surface of the cylinder so as to be encircling.

First claim

What is claimed is:

1. A rotor for an electric machine, comprising a pole core having a coolable magnetisable rotor section made of super-conducting material and having a rotationally symmetric geometry, said pole core being formed as a cylinder, with the rotor section arranged in surrounding relation to an outer surface of the cylinder, said cylinder being formed as a hollow cylinder configured for introduction of a coolant into an interior of the hollow cylinder.

2. The rotor of claim 1 , further comprising a thermal coupling layer formed between the rotor section and the outer surface of the cylinder.

3. The rotor of claim 2 , wherein the thermal coupling layer includes glass fibers.

4. The rotor of claim 2 , wherein the thermal coupling layer is formed from a glass fiber bandage.

5. The rotor of claim 1 , wherein the super-conducting material has a protective layer against a centrifugal force formed during a rotation of the pole core.

6. The rotor of claim 5 , wherein the protective layer is formed as a glass bandage.

7. The rotor of claim 1 , wherein the rotor section is formed from at least one super-conducting tile.

8. The rotor of claim 1 , further comprising a heater arranged on the super-conducting material to heat the super-conducting material to a temperature above a critical temperature.

9. An electric machine, comprising:
a rotor including a pole core having a coolable magnetisable rotor section made of super-conducting material and having a rotationally symmetric geometry, said pole core being formed as a cylinder, with the rotor section arranged in surrounding relation to an outer surface of the cylinder, said cylinder being formed as a hollow cylinder configured for introduction of a coolant into an interior of the hollow cylinder; and
a magnetizing device for inducing a magnetic flux through the super-conducting material.

10. The electric machine of claim 9 , wherein the rotor includes a thermal coupling layer which is formed between the rotor section and the outer surface of the cylinder.

11. The electric machine of claim 10 , wherein the thermal coupling layer includes glass fibers.

12. The electric machine of claim 10 , wherein the thermal coupling layer is formed from a glass fiber bandage.

13. The electric machine of claim 9 , wherein the super-conducting material has a protective layer against a centrifugal force formed during a rotation of the pole core.

14. The electric machine of claim 13 , wherein the protective layer is formed as a glass bandage.

15. The electric machine of claim 9 , wherein the rotor section is formed from at least one super-conducting tile.

16. The electric machine of claim 9 , wherein the rotor includes a heater arranged on the super-conducting material to heat the super-conducting material to a temperature above a critical temperature.

17. The electric machine of claim 9 , wherein the magnetizing device includes at least one magnetizing coil energized by electrical current.

18. The electric machine of claim 9 , wherein the magnetizing device includes at least one stator winding.

Assignees

• Kummeth Peter
• Schmidt Heinz
• Siemens Ag

Inventors

• Kummeth Peter
• Schmidt Heinz

Classifications

• Y02E40/60

  Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment · CPC title

• H02K55/00 Primary

  Dynamo-electric machines having windings operating at cryogenic temperatures · CPC title

• H02K1/28 Primary

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• Y02E40/62

  Cross-Sectional Technologies · mapped topic

• H02K15/03

  having permanent magnets · CPC title