基于ESO的永磁同步电机直接转矩控制

Direct torque control of permanent magnet synchronous motors based on ESO

为了实现永磁同步电机(PMSM)无速度传感器直接转矩控制,本文提出了一种基于扩张状态观测器(ESO)的定子磁链和转速观测器。选取定子磁链作为状态变量,并将包含转速信息的不确定项扩张成为新的状态变量,通过ESO即可实现定子磁链及转速的实时估计。仿真及实验结果表明新型控制策略结构简单,显著地改善了系统的动、静态性能及鲁棒性,能够快速、准确地加工出符合设计需要的模型。

This paper proposed a method of estimating the stator flux and the rotor speed based on extended state observer（ESO） for permanent magnet synchronous motor（PMSM）.In this method,the stator flux is chosen as state variables,and the uncertain components including the rotor speed are extended into a new state variable.Then the stator flux and speed can be obtained by ESO timely.Simulation and experimental results show that the new control strategies improve the system dynamic,static performance and robustness significantly.