基于自抗扰控制器的永磁同步电机速度估计

Research on Speed Estimation of Pmsm Based on Active-disturbance Rejection Controller

利用自抗扰控制器理论,提出了一种新颖的永磁同步电动机无位置传感器矢量控制系统的转速估计方法。将转速和d轴电流对转矩电流环的耦合作用以及转动惯量的变化看作转矩电流环的扰动量,由自抗扰控制器将其观测出来并加以补偿,从而估计出电机实际转速。仿真表明在0r/min到1500r/min的调速范围内,本方法都能将转速准确地估计出来,并且对负载和转动惯量的变化具有很强的鲁棒性,系统具有良好的动静态性能和抗干扰能力。

A novel speed estimation approach to sensorless vector control of Permanent Magnet Synchronous Motor （PMSM） based on Active Disturbance Rejection Controller （ADRC） was proposed. The effect of speed, d-axis current and moment of inertia change in torque loop are regarded as a disturbance, which is observed and then compensated by the Extended State Observer （ESO） of ADRC. The PMSM speed is then estimated based on the exactly observe value of torque loop disturbance. Simulation results show that the speed can be accurately estimated from 0r/min to 1500r/min when load and moment of inertia is changed. A good dynamic and static performance of PMSM speed regulation is achieved by this approach.