Dynamic Characteristic Analysis of a Subscale Linear Permanent Magnet Vehicle

This paper introduces a simulation method using MATLAB/SIMULINK to carry out analysis for the system of linear permanent magnet vehicle. Accounting for the asymmetry of flux chain and back electromotive force (EMF) caused by end effect, 2D finite element method (FEM) combined with time stepping and energy perturbation is used to calculate back EMF and inductance parameters properly. The dynamic performance of linear permanent magnet vehicle is simulated, and the phase current, thrust and velocity curves are presented. A prototype machine is fabricated on the basis of the results. Measured value shows a good agreement with the result of the simulation by MATLABSIMULINK and calculation by using time-stepping FEM. It verifies the validity of the method and provides a new way for the practical design.