基于结构参数的开关磁阻电机非线性模型

开关磁阻电机(SRM)具有简单的结构,但其电磁关系却很复杂,且具有深度局部饱和效应,从而造成其高度的非线性。这是导致其精确数学模型难以建立的主要原因之一。文章根据给定的一套完整的电机结构参数,应用改进的快速非线性法和快速非线性仿真法,并给出相应的改进程序,将其应用在Matlab/Simulink环境下,建立了一种新型的开关磁阻电动机非线性仿真模型。仿真结果证明:该模型与现有的线性模型和准线性模型相比有很大改进,其结构较为简单,结果较为精确,能够准确反映开关磁阻电机的各项稳态性能,若在此模型基础上加上调速控制环节,对于有效分析开关磁阻电机各项性能和深一步研究SRM控制算法具有深刻意义。

A Nonlinear Model of Switched Reluctance Motor Based on Structural Parameters

Although a switched reluctance motor(SRM) has a simple structure,it involves complex electromagnetic interaction and parts of its magnetic path can be deeply saturated.As a result,a SRM has highly nonlinear characteristics,and building its accurate nonlinear model can be very difficult.This article proposes a nonlinear analytical model of SRMs based on the given structural parameters,improved the fast nonlinear method and the fast nonlinear simulation method.The model has been implemented in Matlab/Simulink.The simulation results show that the nonlinear model can produce satisfactory results.Especially it can accurately demonstrate various static characteristics of a SRM.Combination of a speed modulation control part with the nonlinear model might be very useful for the performance analysis and further research on control algorithms of SRMs.