长定子直线同步电机的牵引性能计算

长定子直线同步电机（LSM）是中速磁悬浮列车的关键部件，其牵引能力的计算很重要。本文基于考虑馈电电缆的长定子LSM等效电路建立了牵引特性计算模型，等效电路的参数通过集中参数公式或有限元进行计算。基于Matlab编制了仿真软件，考虑供电模式、牵引电源限制与变压器变比等条件，计算了LSM在系统单端与双端供电模式下的最大牵引能力，包括电机的推力、加速度、电压与电流特性，对比分析了供电方式对LSM性能的影响。仿真结果能够为该类磁悬浮列车长定子LSM的设计提供帮助。

Calculation of Traction Performance of Long Stator Linear Synchronous Motor

The long stator linear synchronous motor (LSM) is key part of middle speed Maglev train, and its calculation of traction ability is very important. This paper erects the calculation model of traction performance based on the equivalent circuit of long stator LSM combined with feeder cable, which parameter is obtained by lumped circuit equation or finite element method. The simulation software is compiled based on Matlab, the maximum acceleration ability is calculated under both single-end power supply and double-end power supply with considering power supply mode, the capacity constraints of traction power converter, transformer ratio and so on, which includes the thrust force, acceleration, voltage and current. By comparison, the influence of power supply mode on traction performance is analyzed. The simulation results can provide help for the long stator LSM design of this kind Maglev train.