开关磁阻电机双目标降低转矩脉动方法

Multiple Target Torque Ripple Reduction Method for Switched Reluctance Motors

开关磁阻电动机(Switched Reluctance Motor,SRM)转矩脉动问题一直是开关磁阻电动机调速控制(Switched Reluctance Driver,SRD)系统应用于高性能电动车辆驱动的瓶颈问题。基于此,介绍了一种利用改进型非支配排序遗传算法(Non-dominated Sorting Genetic Algorithm-Ⅱ,NSGA-Ⅱ)的SRM转矩脉动抑制方法。针对四相8/6极7.5 k W的SRM,以及角度位置控制方式、PI算法、电流和速度的常规双闭环调速控制系统,以转矩脉动最小化和速度脉动最小化为总目标,电流为约束条件,引入NSGA-Ⅱ,进行速度与电流各自的PI参数整定优化,和电机各绕组通电开关角的优化选择。通过仿真与试验证实所提方法具备一定的实际意义。

The problem of torque ripple of switched reluctance motor（SRM） has been a bottleneck for switched reluctance drive（SRD） systems. The paper introduced a method based on non-dominated sorting genetic algorithm-Ⅱ（NSGA-Ⅱ）to minimize torque ripple. For four phase, 8/6-pole and 7.5 k W SRMs, with objectives of minimizing torque ripple and speed ripple, by taking current as the constraint, using NSGA-Ⅱthe paper optimized the parameters of PI gain and switching angles of motor windings. Finally, the certain practical significance of the proposed method is proved through simulations and experiments.