Patent ID: 6708503
Filing Date: 2004-03-23
Classification: F25B,H02K,Y02E

Abstract:
A superconducting machine comprising:a superconductive device; a vacuum enclosure containing and thermally insulating said superconductive device; a cold-trap configured to condense gases generated within said vacuum enclosure; a coolant circulation system adapted to force flow of a cryogen to and from said superconductive device and said cold-trap, said coolant circulation system comprising a primary cooling line configured to cool said superconducting device, and a secondary cooling line configured to cool said cold-trap; and a cryogenic cooling system configured to cool the cryogen in said coolant circulation system upstream of said superconductive devices, wherein an inlet temperature of the cryogen in said primary cooling line is below an operating temperature of said superconductive device, wherein an exit temperature of the cryogen in said primary cooling line is about the operating temperature of said superconductive device, and wherein the inlet temperature in said primary cooling line is at least about ten degrees Kelvin (10Â° K) below the exit temperature in said primary cooling line.