基于负载转矩观测器的PMSM前馈变补偿策略  

Feedforward Variable Compensation Strategy of PMSM Based on Load Torque Observer

作　　者：陈景文[1] 王培瑞 王红艳[2] 李英春[1] CHEN Jing-wen;WANG Pei-rui;WANG Hong-yan;LI Ying-chun(Shaanxi University of Science and Technology,Xi'an 710021,China;不详)

机构地区：[1]陕西科技大学,电气与控制工程学院,陕西西安710021 [2]陕西科技大学,信息与网管中心,陕西西安710021

出　　处：《电力电子技术》2021年第8期47-50,共4页Power Electronics

基　　金：陕西省自然科学基础研究计划(2020JM-511);西安市科技计划(2020KJRC003)。

摘　　要：为提高永磁同步电机(PMSM)的抗扰能力,改善其无位置传感器控制系统中因参数变化导致转速估算精度降低的问题,这里提出一种基于负载转矩观测器的PMSM前馈变补偿控制策略。基于卡尔曼滤波器设计负载转矩观测器与参数辨识器,对负载转矩、交轴电感和转子磁链进行在线辨识,并将辨识参数用于更新负载转矩观测器和前馈补偿系数中的参数变化,以消除因参数变化导致的估算误差。仿真和实验结果表明所提方法可提高系统的鲁棒性和转速估算精度,变补偿系数也使得系统拥有自适应前馈补偿能力,证明了所提策略的有效性。In order to improve the anti-disturbance capability of permanent magnet synchronous motor(PMSM)and improve the problem that the accuracy of speed estimation is reduced due to parameter changes in the sensorless control system,a feedforward variable compensation control strategy of PMSM based on load torque observer is proposed.Based on Kalman filter,the load torque observer and parameter identifier are designed,and the load torque,quadraxon inductance and rotor flux are identified online,and the parameters are used to update the parameter changes in the load torque observer and the feedforward compensation coefficient,so as to eliminate the estimation errors caused by parameter changes.Simulation and experimental results show that the proposed method can improve the robustness and speed accuracy of speed estimation of the system,and the variable compensation coefficient also enables the system to have adaptive feedforward compensation capability,which proves the effectiveness of the proposed strategy.

关 键 词：永磁同步电机 观测器 前馈变补偿 

分 类 号：TM351[电气工程—电机]