The paper presents three persistent-current switches which were developed for superconducting coils on Maglev vehicles. Superconducting wire is used for the switches whose electric resistances are 100 ohms off-state (normal state), and current capacities are over 600A on-state (superconducting state) in a magnetic field of 1.5T. They are constructed of ten slender switch elements connected in parallel. Test results show that two of the switches can pass a current of 700A without quenching under conditions such as momentary spring vibrations or even if one of the ten switch elements is heated by the manganin wire heater.
Development of Persistent-Current Switches for Superconducting Coils on Maglev Vehicles
1990
6 pages
Report
No indication
English
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