基于转矩特性的开关磁阻电动机转矩控制

Torque Control of Switched Reluctance Motor Based on Torque Characteristics

开关磁阻电动机的电磁关系具有高度非线性,传统的电机性能分析方法很难应用到其中。一般的开关磁阻电动机控制方法都需要磁链特性,但是开关磁阻电动机的磁链特性不易获取,由磁链计算转矩也非常复杂。笔者提出了一种不需磁链控制开关磁阻电动机转矩的方法,由实验实际测试开关磁阻电动机的转矩/转子位置/电流特性,根据转矩电流特性控制开关磁阻电动机的转矩。为了验证控制效果,组建了基于转矩特性的开关磁阻电动机转矩控制系统,实验结果表明该方法能精确地控制转矩。

The electromagnetic characteristics of switched reluctance motor was nonlinear and it was difficult to apply the traditional motor function analysis to switched reluctance motor. The common control method of switched reluctance motor needed flux linkage characteristics. But the acquirement of flux linkage characteristics was difficult and the torque calculation by the flux linkage was complicated. This paper proposed a torque control method of switched reluctance motor, which didnt require flux linkage. The torque/rotor position/current characteristics were tested, the switched reluctance motor torque was controlled according to the torque characteristics. In order to verify the control effect, the torque control system of switched reluctance motor was built, which was based on the torque characteristics. The test results showed that the method could control the torque accurately.