LAUSR

The AC losses of high-temperature superconducting (HTS) coils have a large impact on the efficiency of superconducting power devices, so the research on AC losses of HTS coils has become a current hot topic. This paper mainly studied the effects of coil turns, inter-turn spacing, and coil radius of the same superconducting coil structure on its magnetization loss in the external alternating magnetic field environment. Using the finite element simulation software, the two-dimensional axisymmetric model of single-pancake coil with double-tape winding is built. Under the condition of external alternating magnetic field with the same frequency and amplitude, the three structural parameters of superconducting coil are changed, respectively, to calculate the magnetization loss under different conditions. The simulation results are also analyzed theoretically to clarify the main reasons for the change of magnetization loss of the superconducting coil caused by the three variables. The results show that the magnetization loss of the multi-turn superconducting coil is mainly focused on the hysteresis loss. Within a certain range, the more turns of superconducting coil, the smaller the magnetization loss, while the size of inter-turn spacing, and coil radius are positively correlated with the magnetization loss of HTS coils. The simulation results are consistent with the theoretical analysis, which provides ideas and references for the subsequent study of the magnetization loss of HTS coils.