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Patent Searching and Data


Title:
SUPERCONDUCTING SWITCH CIRCUIT
Document Type and Number:
Japanese Patent JPH0311775
Kind Code:
A
Abstract:
PURPOSE:To lessen switch circuit in cost and size and to obtain a large induc tion current by a method wherein a circuit which switches a superconductive path from a superconductor state to a normal conduction state and vice versa through the induction current of the path is provided to a part of the supercon ductor path. CONSTITUTION:An S-N switch circuit 1 is provided to a part of a superconduc tor path B to switches the path B from a superconductor state S to a normal conduction state N and vice versa by the induction current of the path B. The circuit 1 is composed of an alternate power source 2 and a transformer 3, and the transformer 3 takes out an induction current larger than the critical current of the path B from the current of the power source 2. At this point, the turns ratio of a primary winding 3a to a secondary winding 3b of the transformer 3 is so determined as to make an induction current larger than the critical current of the path B. By this setup, a superconduction state S can ber easily switched to a normal conduction state and vice versa by a small current. A large induction current can be obtained by a small and cheap switch.

Inventors:
HARADA NAKAHIRO
SATO ISANORI
YAMAMOTO KIYOSHI
TSUKAMOTO OSAMI
Application Number:
JP14698689A
Publication Date:
January 21, 1991
Filing Date:
June 09, 1989
Export Citation:
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Assignee:
FURUKAWA ELECTRIC CO LTD
International Classes:
H01F6/00; H01H33/00; H01L39/16; H01L39/20; (IPC1-7): H01F7/22; H01H33/00; H01L39/20
Attorney, Agent or Firm:
Shoji Kobayashi