混合励磁磁通切换直线磁悬浮电动机电磁力的有限元计算

Finite Element Calculation of Electromagnetic Force of Hybrid Excitation Flux Switching Linear Magnetic Suspension Motor

研究了用于磁悬浮列车牵引系统的混合励磁磁通切换直线磁悬浮电动机(HEFSLMSM)。该电动机的永磁体、励磁绕组以及电枢绕组均位于初级短动子上,而次级长定子仅由导磁铁心构成,适合于长定子磁悬浮列车的应用场合,结构简单、价格低廉、坚固耐用,可大大降低系统成本。通过研究HEFSLMSM磁悬浮运行原理,建立HEFSLMSM的磁链方程、电压方程,并且根据磁链方程和电压方程推导出磁悬浮力和电磁推力的数学模型。对电动机静态特性以及电磁力进行有限元计算,结果验证了该电动机磁悬浮运行的可行性。

The hybrid excitation flux switching linear magnetic suspension motor(HEFSLMSM)used in the traction system of the maglev train is studied.The permanent magnets,excitation windings and armature windings of the motor are all located on the primary short rotor,while the secondary long stator is only composed of magnetic core,which is suitable for the application of the long stator maglev train.Moreover,the motor has a simple structure,low price,sturdiness and durability,which can greatly reduce the system cost.The magnetic levitation operation principle of HEFSLMSM is studied.By establishing the flux and voltage equations of HEFSLMSM,the mathematical models of magnetic levitation force and electromagnetic thrust are deduced.The static characteristics and electromagnetic force of the motor are analyzed by finite element method,and the results show the feasibility of the magnetic suspension operation of the motor.