基于自抗扰控制器的永磁同步电机无位置传感器矢量控制系统

利用自抗扰控制器(ADRC)理论,提出一种新颖的永磁同步电动机(PMSM)无位置传感器矢量控制系统。控制系统的速度环采用ADRC速度调节器,将负载看作速度环的扰动量,由ADRC观测出并加以补偿,实现了"大误差,小增益;小误差,大增益"的非线性控制,提高了系统的动静态性能和抗扰动能力;采用ADRC速度观测器,将转速和d轴电流对转矩电流环的耦合作用看作转矩电流环的扰动量,由ADRC将其观测出来,从而估计出电机实际转速。仿真和实验表明在0~1500r/min的调速范围内,转速估计准确,系统对负载的变化具有很强的鲁棒性,系统具有良好的动静态性能。

A Novel Approach to Position Senseorless Vector Control of PMSM Based on Active-disturbance Rejection Controller

A novel approach to position sensorless vector control system of permanent magnet synchronous motor (PMSM) based on active disturbance rejection controller (ADRC) is presented in this paper.The speed regulator is an ADRC regulator,in which the effect of load in speed loop is regarded as an external disturbance.The disturbance is observed and compensated by ADRC,which lead to good dynamic and static performance and robust to load.The speed is also estimated by ADRC.The effect of speed and d-axis current in torque loop are regarded as a disturbance,which is observed by ADRC.The PMSM speed is then estimated based on the exactly observe value of torque loop disturbance. Simulation and experiment results show that the speed can be accurately estimated from Or/min to 1500r/min with load or not. A good dynamic and static performance of PMSM speed regulation is achieved by this method.