关键词: 常导高速磁浮列车, 长定子直线同步电机, 悬浮牵引耦合, 最小二乘方法

Abstract: The magnetomotive force produced by stator armature current and rotor excitation current of long stator linear synchronous motor ( LLSM) in electromagnetic suspension high-speed maglev train jointly generate the air gap magnetic field, and then the vehicle realizes the levitation and traction. Therefore, the coupling exists between levitation force and traction force. A simulation model of traction power supply system was established based on MATLAB / Simulink. The LLSM mathematical model without considering the coupling between levitation and traction was adoped, and then the performance of traction system was simulated and calculated under the condition of constant excitation current. The LLSM mathematical model considering levitation-traction coupling was adopted, which was derived by the linear regression least squares method based on sample data from finite element model. The performance of traction system was simulated and calculated while maintaining a constant levitation force. The impact of coupling effect was analyzed by comparing former two simulation results.

Key words: electromagnetic suspension high-speed maglev train, long-stator linear synchronous motor ( LLSM ), levitation and traction coupling, least square method