基于转矩逆模型的SRM转矩脉动抑制研究

摘要

The precision of SRM torque inverse model has great influence on torque control based on current control,and this paper proposes the invertible torque model based on LSSVM optimized by BCC to approve the characteristic of current,torque and angle.Then it combines the torque invertible model with torque distribution function and current control loop to build the torque control system for SRM.The simulation experiment shows that the invertible model accurately reflects characteristic of the torque,angel and current,improves the accuracy of the current control loop in the switched reluctance motor control system,and plays an important role in the decrease of the torque ripple.%开关磁阻电机转矩逆模型的精度对于采用电流控制方式实现转矩控制的系统有很大的影响,文中采用经细菌群体趋药性算法优化后的最小二乘支持向量机建立开关磁阻电机的转矩逆模型,获得电流-转矩-角度特性;进而结合转矩分配函数和电流控制环构SRM转矩控制系统.通过仿真实验表明,该转矩逆模型准确地反映了电机的电流-转矩-角度特性,提高了开关磁阻电机控制系统中电流控制环的精度,并对该系统转矩脉动的抑制有重要作用.