基于间接转矩控制的无位置传感器开关磁阻电机转矩脉动抑制

Torque Ripple Suppression for Sensorless Switched Reluctance Motor Based on Indirect Torque Control

针对无位置传感器开关磁阻电机全速范围内的转矩脉动较大问题,设计了一种间接转矩控制方法分别对高低速不同区间内的转矩脉动进行抑制。首先对于无位置传感器控制方法,建立了低速角度估算法和高速简化磁链法的不同控制模型,对于不同转速范围区间的优劣势构建全速范围内无位置传感器的控制。通过模型分析和公式推导得出影响转矩的因素,即限制电流幅值和调节开通角度等两种间接转矩的控制方法,在低速和高速不同的转速范围应用相应的电流斩波控制方法和角度位置控制方法来对转矩的波动进行抑制。仿真试验结果表明,该方法能够有效抑制无位置传感器开关磁阻电机不同转速区间的转矩脉动。

Aiming at the problem of large torque ripple in the full speed range of sensorless switched reluctance motor,an indirect torque control method is designed to suppress the torque ripple in different high and low speed ranges.Firstly,for the sensorless control method,the different control models of low-speed angle estimation method and high-speed simplified flux linkage method are established.For the advantages and disadvantages of different speed ranges,the sensorless control in the full speed range is constructed.Through model analysis and formula derivation,the factors affecting torque are obtained.Two indirect torque control methods,limiting current amplitude and adjusting turn-on angle,are used to suppress torque fluctuation in different speed ranges of low speed and high speed.The simulation results show that the method can effectively suppress the torque ripple of sensorless SRM in different speed range.