Method for reducing AC loss in superconducting coils

Details Method for reducing AC loss in superconducting coils Method for reducing AC loss in superconducting coils

2005-12-13

2005-12-13

Arbes, Carl J. (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C174S125100, C505S700000, C505S704000, C505S705000

Reexamination Certificate

active

06973708

ABSTRACT:
A method for reducing ac loss in a superconducting coil of cable-in-conduit type superconductor made from chrome-coated compound superconducting strands, characterized in that when a superconducting coil is produced by the wind-and-react technique, bending or twist strain is applied in an amount of 0.15˜0.3% to the conductor cable portion after it has been heat-treated to form the superconducting compound, thereby separating the individual superconducting strands the chrome coat on which sintered as the result of heat treatment and further characterized in that the applied bending or twist strain is thereafter reverted to 0.1% or less, thereby reducing the ac loss of the superconducting coil.

REFERENCES:
patent: 5531015 (1996-07-01), Manlief et al.
patent: 5798678 (1998-08-01), Manlief et al.
patent: 6603379 (2003-08-01), Manlief et al.

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