Development of a Magnetic-field Generator with HTS Current Leads
—Application of Current Lead Equipment without a Gas Cooling System—

Abstract

The magnetic-field generators of electromagnetic vibration apparatus for MAGLEV ground coils operate in a persistent current mode for long periods of time. In addition, almost all of the time, the current lead of the generator acts as a route for heat leak to the inside; therefore, the authors have developed low-heat-load current lead equipment. This equipment consists of a high-temperature superconductor (HTS) lead and the low-duty metallic lead allows the generator to magnetize and demagnetize without a gas cooling system. This realizes labor savings and reliable operations for magnetizing and demagnetizing the generator. This result is also valuable for further improving the superconducting magnet(SCM) of the MAGLEV.