基于无传感器控制的内置式永磁同步电机系统自抗扰控制器适应性研究

Research on the Adaptability of Active Disturbance Rejection Controller for Interior Permanent Magnet Synchronous Motor System Based on Sensorless Control

为了提高无传感器控制的内置式永磁同步电机(IPMSM)暂态过程的响应能力和控制平稳性,引入自抗扰控制(ADRC)技术设计电流环,将交叉耦合项作为未知扰动进行观测,以提高控制精度,减少电流的振荡量与超调量;采用线性扩张观测器(LESO)技术提取位置信息,与滑模观测器相比,系统抖振小,具有更高的控制效率和稳定性。对比基于PI电流环无传感器控制系统的收敛速度及跟踪平滑性的仿真和试验结果表明,采用自抗扰控制技术设计的电流环无传感器控制系统适应性更好,电流谐波小,能够实现平滑跟踪。

In order to improve the response ability and control stability of the transient process of the interior permanent magnet synchronous motor(IPMSM)by the sensorless control,the current loop of the system is designed with active disturbance rejection control(ADRC)technology,and the cross-coupling term is observed as an unknown disturbance to improve control accuracy and reduce current oscillations and overshoots.At the same time,linear extended state observer(LESO)technology is used to extract the rotor position information.Compared with the traditional sliding mode observer,the former system has smaller chattering and higher control efficiency and stability.The proposed system is compared with a position sensorless system based on the PI current loop control,and the simulation results of the difference in convergence speed and tracking smoothness are analyzed.It can be concluded that the positionless control system designed with ADRC current loop has better adaptability and the transient state process is more stable,and the current can realize steady and smooth tracking.