The Interaction Between a High-Temperature Superconducting Coil and In-Series Permanent Magnets

Due to excellent properties of large current-carrying capability and high critical magnetic field, high-temperature superconducting (HTS) materials play an increasingly important role in the field of energy storage. The superconducting magnetic energy storage generally needs power electronic converters to realize the power exchange, where the loss is inevitable. In this paper, the interaction between a closed HTS coil and in-series permanent magnets are investigated, which can realize the efficient storage and release of electromagnetic energy without power electronic converters. The working principle and performance of the proposed structure have been verified through both simulation and experimental tests. The results can provide an insight into constructing high-performance superconducting magnetic energy storage devices.