开关磁阻电动机的PWM控制理论与实践

介绍了开关磁阻电动机ＰＷＭ调速控制的基本原理．在电机磁路不饱和模型下，给出了反映电机平均电磁转矩、转速和相绕组供电电压之间关系的解析表达式．在不同转速和不同转矩下，对三相开关磁阻电动机进行了分散调制式和集中调制式两种ＰＷＭ控制策略的非线性仿真分析和对比．计算与试验结果表明，用分散调制式ＰＷＭ控制的开关磁阻电动机，换相性能好、功率开关器件少、成本低．

Theory and Practice of PWM Control for Switched Reluctance Motors

The principle of PWM control for the switched reluctance motors is given. The equation reflecting the relationship between the average electromagnetic torque, rotor speed of the motor and the supply voltage of the phase winding is also provided in the unsaturated mode. The two PWM control strategies, such as the dispersed modulation and the concentrated modulation, are analyzed and compared at the different rotor speed and the different output torque as taking the three phase switched reluctance motor for example. The calculations and experimental results have shown that the switched reluctance motor using the PWM control strategy of dispersed modulation has the advantages in the excellent performance of commutation, the few numbers of power semiconductor components and the low costs.