Investigation and comparison of AC losses on stabilizer-free and copper stabilizer HTS tapes

摘要

Highlights?Measurement and simulation of Alternating Current (AC) losses on the Stabilizer-free (SF) and Surround Copper Stabilizer (SCS) Tape High Temperature Superconducting (HTS) Tapes.?Frequency dependence analysis (up to kilo Hz) of AC losses on SCS Tape and SF Tape according to the experimental and simulation results.?Measurement and calculation of eddy-current AC losses in copper stabilizer of SCS Tape.AbstractThis paper presents the measurement and simulation of Alternating Current (AC) losses on the Stabilizer-free and Copper Stabilizer High Temperature Superconducting (HTS) Tapes: SuperPower SF12100 and SCS12050. The AC loss measurement utilised electrical method to obtain overall losses with AC transport currents. The 2DH-formulation by COMSOL Multiphysics has been used to simulate the real geometry and multi-layer HTS tapes. Ferromagnetic AC losses of substrate have been assumed to be ignored as the substrates of SF12100 and SCS12050 are non-magnetic. Hysteresis AC losses in the superconducting layer, and eddy-current AC losses in copper stabilizer, silver overlayer and substrate were concerned in this investigation. The measured AC losses were compared to the AC losses from simulation, with 3 cases of different AC frequency 10, 100, and 1000?Hz. The eddy-current AC losses of copper stabilizer at frequency 1000?Hz were determined from both experiment and simulation. The estimation of AC losses with frequency at 10,000?Hz was also carried out using simulation method. Finally, the frequency dependence of AC losses from Stabilizer-free Tape and Copper Stabilizer Tape were compared and analysed.]]>