Invention Grant
- Patent Title: Superconducting fault current limiter and cooling method for superconducting element within superconducting fault current limiter
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Application No.: US14767878Application Date: 2014-02-07
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Publication No.: US10178799B2Publication Date: 2019-01-08
- Inventor: Hajime Kasahara , Tomohiro Nakayama , Masakazu Matsui
- Applicant: FURUKAWA ELECTRIC CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: FURUKAWA ELECTRIC CO., LTD.
- Current Assignee: FURUKAWA ELECTRIC CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Amin, Turocy & Watson, LLP
- Priority: JP2013-025068 20130213; JP2013-025069 20130213
- International Application: PCT/JP2014/052855 WO 20140207
- International Announcement: WO2014/126006 WO 20140821
- Main IPC: H05K7/20
- IPC: H05K7/20 ; H02H9/02 ; H01L39/16 ; H02H7/00

Abstract:
A superconducting fault current limiter (10) is provided with superconducting elements (71, 72) that are in a superconducting state during electrification with a current value in a fixed range and in a normal conducting state during electrification with a fault current in which the current value exceeds the fixed range and is further provided with a coolant vessel (20), which accommodates a liquid coolant (60) and a plurality of superconducting elements, and a cooling means (40) that cools the liquid coolant within the coolant vessel. Within the liquid coolant, the superconducting element (71) for which the critical current is smallest among the plurality of superconducting elements is disposed on the upper side of any other superconducting elements (72). Thus, the superconducting element (71) is cooled, and the life of the superconducting fault current limiter as a whole is extended.
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