[특허]Superconducting device having cryosystem and superconducting switch

Siemens Aktiengesellschaft

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Superconducting device having cryosystem and superconducting switch

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-019/00 F17C-003/10 F17C-003/00 H01F-006/06 H01F-001/00 H01L-039/00
미국특허분류(USC)	062/051.1; 062/048.2; 505/163; 335/216
출원번호	US-0287198 (2005-11-28)
등록번호	US-7509815 (2009-03-31)
우선권정보	DE-10 2004 057 204(2004-11-26)
발명자 / 주소	van Hasselt,Peter
출원인 / 주소	Siemens Aktiengesellschaft
대리인 / 주소	Staas & Halsey LLP
인용정보	피인용 횟수 : 5 인용 특허 : 7

초록
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A superconducting device has a cryosystem to whose cryogenic medium a superconducting appliance and a superconducting switching path (which is electrically connected to it and can be activated thermally by means of a heater) of a superconducting switch are thermally coupled. A pipeline, to whose end the superconducting switching path is thermally coupled, is connected to a coolant area of at least one superconducting appliance. To ensure reliable heating of the switching path when the heater is activated, the pipeline has a cross-sectional constriction w...

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What is claimed is: 1. A superconducting device, comprising: at least one superconducting appliance with superconductors; a superconducting switch, including a superconducting switching path, formed of superconducting material, electrically connected to the superconductors, and heating means, associated with the superconducting switching path, for controlled changing of the superconducting material of the switching path to a normally conductive state; and a cryosystem with a cryogenic medium, including at least one refrigeration installation cooling the cryogenic medium and having a refrigeration power, a coolant area collecting the cryogenic medium cooling the superconductors of said at least one superconducting appliance, and a pipeline having an open first end connected to the coolant area of the cryogenic medium to access a part of the cooling medium and a closed second end thermally coupled to the superconducting switching path of said superconducting switch, having a constriction with a cross-sectional area such that the refrigeration power transferred by the cryogenic medium located in the coolant area through the cross-sectional constriction is less than the dissipated thermal losses caused on activation of the heating means. 2. The device as claimed in claim 1, wherein the cross-sectional area of the constriction is between 0.5 mm2 and 100 mm2. 3. The device as claimed in claim 2, wherein the cross-sectional area of the constriction is between 7 mm2 and 30 mm2. 4. The device as claimed in claim 1, wherein the constriction is located in a part of the pipeline facing said superconducting switch. 5. The device as claimed in claim 1, wherein said cryosystem further includes a coolant line system having coolant paths on or through said at least one superconducting appliance, the collection area being part of the coolant line system. 6. The device as claimed in claim 5, wherein the cryogenic medium in the coolant line system circulates based on the thermosyphon effect. 7. The device as claimed in claim 6, wherein said at least one refrigeration installation includes a cold head located in the coolant line system and introducing the refrigeration power into the cryogenic medium. 8. The device as claimed in claim 1, further comprising a common vacuum area substantially surrounding said at least one superconducting appliance and said superconducting switch. 9. The device as claimed in claim 8, wherein the cryogenic medium in the pipeline circulates based on the thermosyphon effect. 10. The device as claimed in claim 9, wherein the cryogenic medium is helium. 11. The device as claimed in claim 1, wherein said superconducting switch is a continuous-current switch. 12. The device as claimed in claim 1, wherein said at least one superconducting appliance is a magnetic resonance imaging magnet. 13. The device as claimed in claim 1, wherein the superconductors of said at least one superconducting appliance are formed of metallic low-Tc superconductor material. 14. The device as claimed in claim 1, wherein the superconductors of said at least one superconducting appliance are formed of oxidic high-Tc superconductor material. 15. A superconducting device, comprising: at least one superconducting appliance with superconductors; a superconducting switch, including a superconducting switching path, formed of superconducting material, electrically connected to the superconductors, and heating means, associated with the superconducting switching path, for controlled changing of the superconducting material of the switching path to a normally conductive state; and a cryosystem with a cryogenic medium, including at least one refrigeration installation cooling the cryogenic medium and having a refrigeration power, a coolant area collecting the cryogenic medium cooling the superconductors of said at least one superconducting appliance, and a pipeline having an open first end connected to the coolant area of the cryogenic medium to access a part of the cooling medium and a closed second end thermally coupled to the superconducting switching path of said superconducting switch, having a cross-sectional constriction, the square dimension of the cross-sectional constriction is provided so that the dissipated thermal losses caused on activation of the heating means are greater than the refrigeration power transferred by the cryogenic medium located in the coolant area through the cross-sectional constriction. 16. A superconducting device, comprising: at least one superconducting appliance with superconductors; a superconducting switch, including a superconducting switching path, formed of superconducting material, electrically connected to the superconductors, and heating means, associated with the superconducting switching path, for controlled changing of the superconducting material of the switching path to a normally conductive state; and a cryosystem with a cryogenic medium, including at least one refrigeration installation cooling the cryogenic medium and having a refrigeration power, a coolant area collecting the cryogenic medium cooling the superconductors of said at least one superconducting appliance, and a pipeline having an open first end connected to the coolant area of the cryogenic medium to access a part of the cooling medium and a closed second end thermally coupled to the superconducting switching path of said superconducting switch, having a constriction with a cross-sectional area limiting the refrigeration power transferred by the cryogenic medium located in the coolant area through the cross-sectional constriction to an amount less than the dissipated thermal losses caused on activation of the heating means. 17. A superconducting device, comprising: at least one superconducting appliance with superconductors; a superconducting switch, connected to the superconductors, to switch between a superconducting and normally conductive state; a cryosystem with a cryogenic medium to cool the superconductors; and a pipeline having an open first end connected to the cryosystem and a closed second end thermally coupled to the superconducting switch; wherein the pipeline includes a constricted area that reduces refrigeration power from the cryosystem required in response to heat dissipation from the superconducting switch.

인용문헌 (7)

이 특허를 인용한 특허 (5)

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Superconducting device having cryosystem and superconducting switch

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Superconducting device having cryosystem and superconducting switch

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