SRD小信号模型的建立与根轨迹分析

The Establishment of SRD Small Signal Model and the Root Locus Analysis

介绍了SRD的系统组成,并根据SR电动机状态方程及基尔霍夫电压电流定律推导出8/6极四相SR电动机主电路数学模型,它给出了SR电动机电压斩波控制方式下的传递函数,利用小信号拢动法对非线性的SRD进行局部线性化,并结合PID控制技术导出SRD系统的传递函数,其目的在于可运用线性系统理论简化SRD闭环系统的分析;MATLAB/SIMULINK绘制的系统根轨迹结果表明,此方法可以较好的分析系统的性能。

This paper simply describes a sy.stem con~. sed of the SRD, and based on the SRM state equations and Kirchhoff voltage and current laws. It derives 8/6 0de＇four-phase SR motor mathematical model of the main circuit and gives the transfer function of SRM under voltage Using the small signal dist/trbance, we turn the nonlinear SRD into partial linear. With PID corrtml technique, we can obtain the transfer function of SRD system.The aim is to simplify the use of linear system ~, MATLAB/SIMULINK drawing system root locus and better analyze the system performance. the analysis of closed-loop SRD system.we make use of analyze the system performance. ,which shows that method can