We fabricated a persistent current HTS magnet wound with conductors composed of four Ag-sheathed Bi2223 wires and an insulated stainless-steel tape. The HTS magnet is composed of 12 racetrack formed single-pancake coils and impregnated with epoxy resin. The magnet is the same size as a magnet for a Maglev train. The stored energy of the magnet is 0.34 MJ and the central magnetic field is 1.3 T at the rated current operation of 532 A. Cooling the magnet to less than 20 K, I-V characteristics in persistent current operations and AC losses in charging and discharging the magnet were investigated.
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Tasaki et al. (2005) studied this question.
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