ROTOR HAVING A SUPERCONDUCTING ROTOR WINDING AND AN INTEGRAL SLEEVE SURROUNDING THE ROTOR WINDING
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Abstract
A rotor for an electrical machine, in particular a synchronous machine has a rotor axis which defines a rotor shaft. The rotor has a winding support which is arranged on the rotor shaft such that they rotate together, in such a way that it surrounds the rotor shaft in a centre section with respect to the rotor axis. The winding support is fitted with a superconducting rotor winding. The rotor has a sleeve which at least radially surrounds the winding support and the rotor winding with respect to the rotor axis. At least in the area, in which it radially surrounds the winding support and the superconducting rotor winding, the sleeve is formed integrally from a metal alloy, which is non-magnetic, has an electrical conductivity of at least 60% of the electrical conductivity of copper at 20° C., has a mechanical tensile strength of at least 250 N/mm2 at 200° C. and has a 0.2% proof stress of at least 200 N/mm2 at 200° C.
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Citations
15 Claims
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1-7. -7. (canceled)
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8. A rotor for an electrical machine, in particular a synchronous machine, comprising:
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a rotor shaft defining a rotor axis, a rotor winding support, which is arranged fixed against rotation on the rotor shaft, with the result that it surrounds the rotor shaft in a central section, in relation to the rotor axis, a superconducting rotor winding which is supported by the winding support, and a sleeve, which surrounds the winding support and the rotor winding at least radially, in relation to the rotor axis, where the sleeve comprises integrally of a copper alloy which contains a maximum of 2.0 percent by weight of chromium, at least 0.1 and at most 0.5 percent by weight of zirconium and the remainder copper, at least in the region in which it surrounds the winding support and the superconducting rotor winding radially (lateral surface of the sleeve). - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A sleeve for a rotor of an electrical machine, comprising integrally of a copper alloy which contains a maximum of 2.0 percent by weight of chromium, at least 0.1 and at most 0.5 percent by weight of zirconium and the remainder copper, at least in the region in which it surrounds the winding support and the superconducting rotor winding radially (lateral surface of the sleeve).
Specification