Rotary electrical machines
阅读：947发布：2022-06-27
专利汇可以提供Rotary electrical machines专利检索，专利查询，专利分析的服务。并且A synchronous alternating current machine having a superconducting field winding on a hollow cylindrical portion of a rotor which is joined by hollow frustoconical transition members to supporting stub shafts. The field winding is cooled by cryogenic fluid from a refrigerator, which may be wholly or partly within the rotor, and heat leak into the winding is minimized by the hollow transition members, which are themselves cooled, and a radiation shield mounted on the outside of the rotor.，下面是Rotary electrical machines专利的具体信息内容。
1. A synchronous altErnating current electrical machine comprising a stator, a rotor mounted for rotation within said stator, said rotor comprising a hollow cylindrical body of nonmagnetic material, end shaft portions at the two ends of said cylindrical body, and hollow transition members of nonmagnetic material connecting each end of the cylindrical body to one of said end shaft portions, said transition members being capable of transmitting the running torque of the machine, a superconducting winding supported on said cylindrical body, means for supplying cryogenic fluid to cool said superconducting winding and said transition members, and at least one radiation shield mounted on the outside of said rotor in spaced relation to said cylindrical body.
2. An electrical machine as claimed in claim 1 comprising a magnetic shield forming part of said stator.
3. An electrical machine as claimed in claim 1 in which said transition members are frustoconical.
4. An electrical machine as claimed in claim 1 comprising a casing mounted on the rotor and enclosing a vacuum space, said radiation shield being disposed in the vacuum space.
5. An electrical machine as claimed in claim 4 having pipes for cryogenic fluid disposed on said radiation shield.
6. An electrical machine as claimed in claim 1 wherein said superconducting winding is mounted on the interior of said cylindrical body.
7. An electrical machine as claimed in claim 1 wherein said hollow transition members are evacuated to reduce heat leakage into said rotor.
8. An electrical machine as claimed in claim 1 wherein said hollow cylindrical body and said hollow transition members are evacuated.
9. An electrical machine as claimed in claim 1 wherein the superconducting winding is distributed around the cylindrical body of the rotor with a changing radial depth whereby the current and hence the radial field change sinusoidally around the motor.
10. A machine as claimed in claim 9 having a dummy winding or packing supported on the cylindrical body to produce a uniform distribution of weight around the rotor.
11. A machine as claimed in claim 9 having means reinforcing the cylindrical body against distortion by electromagnetic forces acting on the superconducting winding.
12. A machine as claimed in claim 10 wherein the cylindrical body has a central hollow tubular member and radial webs extending between said tubular member and the body to resist distortion of the body by electromagnetic forces acting on the winding.
13. A machine as claimed in claim 1 wherein the means for supplying cryogenic fluid include a refrigeration stage mounted within the rotor, said refrigeration stage supplying cryogenic fluid to ducts within the superconducting winding.
14. A machine as claimed in claim 13 in which the means for supplying cryogenic fluid also include a compressor and a further refrigeration stage outside the rotor.
15. A machine as claimed in claim 14 having cooling coils on said transition members, said cooling coils being connected to said further refrigeration stage.
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