基于扩张状态观测器的永磁直线同步电机改进模型预测电流控制  

Improved model predictive current control based on extended state observer for permanent magnet linear synchronous motor

作　　者：赵希梅[1] 孙文浩 金鸿雁 ZHAO Ximei;SUN Wenhao;JIN Hongyan(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870

出　　处：《电机与控制学报》2024年第7期34-42,共9页Electric Machines and Control

基　　金：辽宁省博士科研启动基金计划项目(2022-BS-177);辽宁省科技厅揭榜挂帅项目(2023JI1/11100004)。

摘　　要：针对永磁直线同步电机(PMLSM)模型预测电流控制(MPCC)中存在的电流脉动过大、在线计算复杂的问题,提出一种基于扩张状态观测器(ESO)的改进MPCC策略。利用最优电压矢量相角和重新划分后的电压矢量扇区,改进第一电压矢量的选取方式,减小第二电压矢量选择范围,以实现电压矢量的快速选取,进而降低电流脉动。同时,为了提高PMLSM抗负载扰动能力,通过ESO对扰动进行观测,将观测到的扰动转换为电流进行补偿,提高系统的鲁棒性,且补偿电流可起到进一步减小电流脉动的作用。仿真结果表明,所提出的控制方法切实可行,与MPCC相比,基于ESO的改进MPCC系统具有更好的控制性能、更小的电流脉动和较强的鲁棒性能。In order to solve the problems of excessive current ripple and complex online calculation in model predictive current control(MPCC)of permanent magnet linear synchronous motor(PMLSM),an improved MPCC strategy based on extended state observer(ESO)was proposed.Using the optimal voltage vector phase angle and the re-divided voltage vector sector,the selection method of the first voltage vector is improved,and the selection range of the second voltage vector is reduced,so as to realize the rapid selection of the voltage vector and reduce the current ripple.At the same time,in order to improve the anti-load disturbance capability of PMLSM,the disturbance was observed through ESO,and the observed disturbance was converted into current for compensation,which improves the robustness of the system,and the compensation current can further reduce the current ripple.The simulation results show that the proposed control method is feasible.Compared with MPCC,the improved MPCC system based on ESO has better control performance,smaller current ripple and stronger robustness.

关 键 词：永磁直线同步电机 改进模型预测电流控制 扩张状态观测器 最优电压矢量相角 电流脉动 鲁棒性 

分 类 号：TM351[电气工程—电机]