EMS型磁浮列车驱动力和悬浮力的计算新方法

针对电磁悬浮(EMS)型磁浮列车用凸极直线同步电机定子和转子齿槽不连续分布的特点，提出一种基于解析的驱动力和悬浮力计算新方法.该方法在分析列车运行时所在位置处的定子和转子几何分布和载荷分布基础上，根据列车所在位置处的定子电流磁动势分布和磁场强度的分布，计算出所有驱动力的大小.通过研究列车所在位置处的定子与转子总的磁导率函数分布和励磁曲线分布，得出列车运行过程中所有悬浮力的大小.计算结果表明，驱动力和悬浮力的波动频率是定子电流变化频率的6倍.当转子极距大于定子极距时，可以获得较大的悬浮力和驱动力，驱动力和悬浮力的波动也相对较小.

New computational method of driving thrust and lift force for EMS maglev vehicle

Considering the alveolus discontinuous distribution of stator and rotor in salient pole synchronous motor applied to electromagnetic suspension(EMS) maglev train,a novel analytical computation method of thrust force and levitation force was put forward.Based on the geometrical and the load distributions of stator and rotor at the running position of the train in the method,all thrust forces were computed according to stator magnetomotive force and the magnetic field strength distributions of the train position.All levitation forces of the running train were obtained according to the distributions of overall magnetic conductance function and current charge curve for stator and rotor.The results show that the fluctuating frequencies of driving thrust and lift force are six times that of the stator current frequency.When rotor polar distances are bigger than stator polar distances,driving thrust and lift force become larger and fluctuations of driving thrust and lift force become relatively less.