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US Patent 5565763 - Thermoelectric method and apparatus for charging superconducting magnets
US Patent Issued on October 15, 1996
Estimated Patent Expiration Date:
November 19, 2013Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
November 19, 2013Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA method and apparatus for charging superconducting magnet coils using the Seebeck effect of thermoelectric materials. Superconducting magnet coils are wound from a superconducting material, such as niobium-titanium, and placed in a cryogenic dewar to cool the coil below the critical temperature at which the coil becomes superconducting. The coil can be charged by providing a suitable thermocouple junction outside the dewar and a reference thermocouple junction inside the dewar and connecting the junctions to the coil in a manner providing charging current flow to the coil in accordance with the Seebeck effect. This method is particularly desirable for use with lightweight magnet systems for use in such applications as magnetic levitation systems for trains, space applications, etc. where the present heavy switching power supplies are undesirable. | InventorsAssigneeApplicationNo. 154905 filed on 11/19/1993US Classes:323/360, Superconductive505/869Power supply, regulation, or energy storage system: (Class 323)Field of Search323/360, Superconductive361/19, Superconductor protective circuits361/141, Including superconductivity505/211, Electrical energy storage device (e.g., accumulator, etc.), inductor, transformer, magnetic switch, magnetic ring, sphere, coil, or magnetic arrangement505/851, Control circuit for electromagnetic device: (Class 361/141)505/867, Electric power conversion system: (Class 363)505/869, Power supply, regulation, or energy storage system: (Class 323)505/870Including transformer or inductor: (Class 323/360)ExaminersPrimary: Nguyen, MatthewAttorney, Agent or FirmUS Patent References3667029, 3848162, 4764834, Thin film magnetic transducer having a separate magnetically conductive layerIssued on: 08/16/1988 Inventor: Roscamp , et al.4994932, Superconducting current limiting apparatus Issued on: 02/19/1991 Inventor: Okamoto, et al.5250508Superconductor current-limiting apparatus Issued on: 10/05/1993 Inventor: Pham International ClassH01F 036/00 |
