基于Pspice的电动汽车用开关磁阻电动机建模与仿真

本文提出了一种基于通用电路分析软件Pspice的开关磁阻电动机(SRM)的动态仿真模型.模型中利用有限元计算的SRM磁化曲线数据,电路部分采用反电动势模型,并考虑了可变电感动态变化对绕组反电动势的影响,利用适当的控制源将SRM的电路和磁路相耦合.利用提出的Pspice仿真模型,对研制的12/8极20kW电动汽车用SRM进行了仿真计算,实验结果验证了该模型的正确性,对SRM的进一步优化设计、优化控制等均具有指导意义.

Pspice-Based Modeling and Simulation of SRM Applied to Electric Vehicles

This paper presents a new nonlinear model of SRM applied to electric vehicle using Pspice which is a general-purpose circuit simulator. For the modeling procedure, FEM data of flux linkage for different rotor positions from the aligned to the unaligned position for various stator winding excitation currents of the SRM are available. In the procedure, the electrical part of the motor is modeled by the induced back-electromotive force and the speed-induced voltage due to the dynamically changing variable inductance is considered. The electric circuit and magnetic circuit of SRM are coupled by proper controlled sources. The mechanical part is modeled by torque versus rotor position and stator winding current. Based on the proposed Pspice model, the dynamic characteristics of the 20kW, 12/8 SRM drive such as an exciting voltage, winding current, torque are obtained. The calculation values are compared with the measurement data, in order to evaluate the validity of the proposed Pspice model.