| 摘要 |
PROBLEM TO BE SOLVED: To provide a critical-current measuring method and system of a superconducting cable, capable of easily measuring critical current of the long superconducting cable. SOLUTION: The critical-current measuring method of the superconducting cable measures the critical current of the super-conducting cable having a plurality of power transmission paths. Reciprocating current-carrying is performed, by making one-directional current flow in one power transmission path (cable core 10A) to be measured of the plurality of power transmission paths and making reverse-directional current flow in another power transmission path (cable core 10B), and the critical current Ic in the power transmission path to be measured is determined. Due to this constitution, the power transmission path itself can serve as a function of a lead wire. Thus, it is not necessary to use a long lead wire, and can solve all the problems, such as a problem of pull of the lead wire accompanying it or a problem of requiring bulk direct current power supply. COPYRIGHT: (C)2007,JPO&INPIT
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