A Comparative Study on Hysteresis Losses in High $T_{ \rm c}$ Tapes for Superconducting Fault Current Limiter Applications

Hysteresis loss is an important parameter of high-temperature superconductors while designing inductive type superconducting fault current limiters (SFCLs). Furthermore, in high temperature superconducting (HTS) tapes, the major part of the magnetic field in a coil configuration is parallel to the tape face. To optimize the design of an SFCL based on HTS, the hysteresis losses should be minimum at the operating temperature and current. Therefore, we investigated M-H curves for Bi2223-based 1st generation (1G) and YBCO-based 2nd generation (2G) HTS tapes in magnetic fields applied parallel and perpendicular to the tape surface to obtain hysteresis losses. The temperature (35-77 K) and magnetic field (0-3 T) dependence of hysteresis loss and critical current together are analyzed for both 1G and 2G HTS tapes to assess their applicability to SFCL.