Retracted: Analysis of Suspension and Guidance System of EDS Maglev Based on a Novel Magnetomotive Force Model

Abstract

Due to the existence of the end effect of vehicle coils in the electrodynamic suspension (EDS) maglev, the fluctuation of the output parameters of the suspension and guidance system is common, which has an impact on the stability of the motor driving system. In this article, considering the end effect of vehicle coils, a new magnetomotive force (M.M.F) distribution model suitable for the suspension and guidance system of EDS maglev is proposed. First, considering the end effect of vehicle coils, an M.M.F model of array of vehicle coils is established. Then, based on the space harmonic method and the equivalent circuit of suspension and guidance loop, the expressions of levitation current, guidance current, drag force, levitation force, levitation stiffness, guidance force, and guidance stiffness are presented. Finally, the characteristics of the suspension and guidance system are analyzed under different running conditions. The numerical results are compared with the 3-D finite-element method simulation results and the experimental results of the Yamanashi test line. The relative error is almost within 10%, which verified the feasibility and accuracy of the M.M.F model and analytical method.