Characteristics Analysis of Integrated Linear Motor Combined Propulsion Levitation and Guidance Used for Superconducting Electrodynamic Suspension Train

Superconducting electrodynamic suspension (EDS)system has the advantages of large suspension gap and high drag ratio, which is one of the development directions of high-speed maglev transportation system. Connecting the propulsion current to the double side parallel null flux coils and form the linear synchronous motor system combined propulsion-levitation and guidance (PLG), can greatly reduce the construction cost and improve the commercial competitiveness of the superconducting EDS system. At present, there are few studies on the comprehensive characteristics of PLG system. In this paper, a numerical model for the comprehensive characteristics analysis of PLG system was proposed, and the accuracy of the model was verified by finite element method and test results. Then, taking the PLG system developed by Yamanashi Test Line as the research object, the characteristics of PLG system were analyzed in terms of lift-to-drag ratio, five-degree of freedom stiffness characteristics, levitation- propulsion coupling characteristics, traction characteristics, and disturbance characteristics of superconducting (SC) coils, etc. The characteristics of the PLG system was compared with the existing levitation coil and double-layer propulsion coil separation (LG-LSM) system of Yamanashi Line, and analyzed the advantages and disadvantages of PLG system.