高速磁浮列车电磁力的软测量技术

Electromagnetic forces' soft measurement technology of high speed magnetic levitation vehicle

针对高速磁浮列车在运行过程中电磁力难以直接测量的困难,采用有限元分析软件AN-SYS建立了悬浮电磁铁的二维模型,并对模型进行了有限元分析与计算,得到了其内部的磁力线分布情况以及磁浮列车在不同运行情况下的电磁力数据,并总结了推力和悬浮力随功率角、气隙、定子电流和转子电流的变化规律,在此基础上采用最小二乘法建立了指数形式的电磁力软测量模型。采用该模型,列车在运行过程中所产生的电磁力可以通过气隙、定子电流和转子电流的测量结果计算得到。该模型的最大误差小于1%,为高速磁浮列车运行过程中电磁力的计算和控制提供了重要依据。

The electromagnetic forces of a high speed magnetic levitation vehicle are hard to be measured when the vehicle is running. The 2D model of the levitation electromagnet is established using finite element software ANSYS. The inner distribution of levitation electromagnet＇ s magnetic line of force is derived. The electromagnetic forces are also analyzed and calculated when the vehicle is experiencing various running conditions. The rules of driving force and levitation force varying with power angle, air gap, stator current and rotor current are summarized and the electromagnetic forces＇ exponential soft measurement model is established using the least square method. Using this model, the electromagnetic forces produced by the vehicle can be calculated according to air gap, stator current and rotor current. The maximum error of this model is less than 1%, which provides important evidence for the calculation and control of high speed magnetic levitation vehicle＇s electromagnetic forces.