Rotor for an electric machine and electric machine
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.
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.