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Description
High-temperature superconducting (HTS) maglev has the advantages of strong suspension ability, high speed, and low operating cost, which is an important candidate technology for future high-speed rail transportation, and the on-board HTS magnet is one of its core components. In recent years, metal-insulated (MI) winding technology has brought better mechanical stability and good self-protection characteristics to the on-board magnet. In this paper, an on-board HTS magnet for a high-acceleration electrodynamic suspension (EDS) system was designed. Firstly, full-scale HTS racetrack coils were wound with second-generation (2G) HTS tapes co-wound with stainless steel tapes, and they were tested separately in a liquid nitrogen environment. These coils were then assembled and further tested, and these test data were compared and analyzed. Finally, based on these data, a persistent current switch (PCS) for this magnet was designed and fabricated. The closed-loop operation experiments of the on-board magnet were successfully completed under a liquid nitrogen environment, and the experimental results meet the application requirements. This work provides technical support for the application of closed-loop operation on-board HTS MI magnets in the future.
