Application of Vacuum Technology in High-temperature Superconducting Electrodynamic Suspension Transportation System
In a high-temperature superconducting(HTS)electrodynamic suspension(EDS)transportation system,the application of vacuum technology provides a perfect vacuum environment which can obtain and maintain the superconductive performance of the coils for HTS magnets,so that it can satisfy the requirements of the train propulsion,levitation,and guidance.In this paper,the EDS transportation system principle and the structure composition of onboard HTS magnets are introduced.Through vacuum system design and vacuum acquisition equipment selection,combined with vacuum measurement and leak detection technology,the high vacuum holding system with a vacuum degree of 1×10-5 Pa and a maximum leakage rate of 1.33×10-10 Pa·m3/s for superconducting magnet was developed.And it has been stably put into service in the full elements test system of HTS EDS which is the first self-developed in China.
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