基于跟踪微分观测器的永磁同步电机控制系统

Permanent Magnet Synchronous Motor Control System Based on Tracking Differential Observer

传统PI控制无法实现永磁同步电机(PMSM)交直轴间的完全解耦。为此该文提出一种基于跟踪微分观测器(TD-NLESO)的永磁同步电机(PMSM)控制系统。采用线性自抗扰控制器(LADRC)对扰动的观测来抵消电感耦合项,实现电流环解耦,并对线性扩张状态观测器的结构进行改进,提高对扰动的观测速度;同时设计含预估因子的跟踪微分器以克服控制延时问题;最后,通过实验验证该策略具有可行性和良好的控制性能。

In traditional PI control systems,complete decoupling between the AC and DC axes cannot be achieved.This article proposes a permanent magnet synchronous motor(PMSM)control system based on tracking differential observer(TD-NLESO).Using a linear active disturbance rejection controller(LADRC)to counteract the inductive coupling term and achieve current loop decoupling,the structure of the linear extended state observer is improved to improve the observation speed of disturbances.Simultaneously design a tracking differentiator with an estimation factor to overcome control delay issues.Finally,the feasibility and good control performance of this strategy were verified through experiments.