基于滑模自抗扰的永磁同步电机电流环控制方法研究

为了提高永磁同步电机控制系统的稳定性,针对滑模控制存在的抖振现象以及系统运行时的扰动问题,给出了一种基于线性滑模自抗扰控制的电流控制器,所谓线性滑模自抗扰控制就是滑模控制与自抗扰控制的结合,其核心为扩张状态观测器,扩张状态观测器可观测系统的状态及扰动并对扰动进行补偿,能有效抑制系统扰动、提高系统的动、静态性能。搭建永磁同步电机滑模自抗扰矢量控制仿真模型,仿真结果表明,与传统滑模控制相比,该方法提高了永磁同步电机控制系统的稳定性,削弱了系统抖振,改善了系统扰动问题。

Research on current loop control of permanent magnet synchronous motor based on sliding mode auto-disturbance rejection

In order to improve the stability of permanent magnet synchronous motor control system, a novel current controller based on linear sliding mode active disturbance rejection is presented, the so-called linear sliding mode active disturbance rejection control is the combination of sliding mode control and active disturbance rejection control,which is based on the chattering phenomenon of sliding mode control and the disturbance of the system. Extended state observer is the core of active disturbance rejection control (ADRC),which can effectively suppress system disturbance and improve the dynamic and static performance of the system.The simulation model of permanent magnet synchronous motor (PMSM) sliding mode active disturbance rejection vector control is built.The simulation results show that compared with the traditional sliding mode control, this method improves the stability and disturbance problem of PMSM control system.