具有死区补偿的自抗扰控制下PMSM转矩脉动抑制方法

Torque ripple suppression method of PMSM based on ADRC with deadtime compensation

空间矢量脉宽调制死区效应对永磁同步电机(PMSM)的调速控制系统及转矩脉动有一定影响,为了削弱其不利作用,在永磁同步电机矢量控制基础上,提出一种新型的具有死区补偿的自抗扰PMSM控制方案,针对传统自抗扰控制策略下电机转矩脉动较大的缺陷,在原有的自抗扰控制策略中加入死区补偿.仿真及实验结果表明,具有死区补偿的自抗扰PMSM驱动系统,谐波含量明显减少,速度驱动系统更加平稳,有效抑制了转矩脉动.

The permanent magnet synchronous motor（PMSM） speed control system and its torque ripple can be affected by the dead-time effect of space vector pulse width modulation（SVPWM）. To solve this problem, on the basis of the vector control method, a novel active-disturbance rejection controller（ADRC） with dead-time compensation is presented.By combining dead-time compensation with ADRC, the magnitude of torque ripple can be significantly reduced. Simulation results show that the harmonic content can be reduced dramatically, the speed control system is more stable, and the torque ripple can be suppressed effectively in the improved ADRC system.