多参数变化下基于参数辨识的永磁同步电机偏差解耦控制方法  

A deviation decoupling control method of permanent magnet synchronous motor based on parameter identification under multi-parameter variation

作　　者：邓聪颖 舒杰[1] 陈翔 王頲 禄盛[1,2] Deng Congying;Shu Jie;Chen Xiang;Wang Ting;Lu Sheng(School of Advanced Manufacturing Engineering,Chongqing Universiy of Posts and Telecommunications,Chongqing 400065,China;Institutle for Adranced Sciences,Chongqing Unirersity of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学先进制造工程学院,重庆400065 [2]重庆邮电大学高等科学研究院,重庆400065

出　　处：《仪器仪表学报》2022年第6期260-268,共9页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51705058);重庆市教委科学技术研究项目(KJZD-K201900604)资助。

摘　　要：针对矢量控制下永磁同步电机d-q轴电流无法动态解耦,导致电机参数的动态变化影响其控制系统稳定性问题,提出一种基于参数辨识的永磁同步电机偏差解耦控制(PI-DDC)方法。以d-q轴电流控制器耦合系数为零推导完全解耦下偏差解耦项的传递函数,由此考虑电阻、电感和永磁体磁链等电机参数的动态变化对偏差解耦效果的影响,引入带遗忘因子递推最小二乘法在线辨识电机各参数,通过实时修正偏差解耦控制模型中的电机参数实现d-q轴电流解耦。以一台永磁同步电机为例,不同工况下的仿真和实验结果表明,所提的PI-DDC方法相比于传统偏差解耦控制方法,d-q轴电流响应时间缩短约50%,超调量分别减小约60%和70%,最大波动幅值分别减小约30%和37%,具有更好的控制精度和动态性能。The d-q axis current of the PMSM under the vector control cannot be dynamically decoupled, which brings difficulty in adapting to the dynamic changes of the motor parameters. The stability of the motor control system is affected. To address this issue, this article proposes a deviation decoupling control method of the PMSM based on the parameter identification(PI-DDC). First, taking the coupling coefficient of the d-q axis current controller as zero, and the transfer function of the deviation decoupling could be obtained under this condition. Then, the dynamic changes of the motor parameters that affect the decoupling effect of the deviation decoupling can be considered, such as the resistance, inductance and permanent magnet flux. The recursive least square method with the forgetting factor is introduced to online identify the motor parameters, which are further used to correct the corresponding values in the deviation decoupling control model real time and the current decoupling of d-q axis can be realized. A case study has been carried out on a PMSM. The simulation and experimental results under different working conditions validate the better control accuracy and dynamic performance of the proposed PI-DDC method comparing with the traditional deviation decoupling control method. The response time, overshoot and fluctuation amplitude of the d-q axis current are decreased about 50%, 60% and 70%, and 30% and 37% respectively.

关 键 词：永磁同步电机 矢量控制 偏差解耦 参数辨识 

分 类 号：TM341[电气工程—电机] TH139[机械工程—机械制造及自动化]