一种改进型永磁同步电机无模型预测电流控制策略  

An Improved Model-Free Predictive Current Control Strategy for Permanent Magnet Synchronous Motors

作　　者：罗力岩 樊启高[1] Luo Liyan;Fan Qigao(School of IOT Engineering Jiangnan University,Wuxi 214122 China)

机构地区：[1]江南大学物联网工程学院,无锡214122

出　　处：《电工技术学报》2025年第4期1034-1045,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(62373168)。

摘　　要：针对有限集模型预测控制算法在电机参数失配时导致系统可靠性下降的问题,提出一种基于超局部模型的永磁同步电机无模型预测电流控制策略。然而,在以电流误差计算的方法对超局部模型参数进行辨识的过程中,存在电流更新停滞的问题,导致系统性能下降。因此,该文针对此问题提出了一种基于功率因数角计算的无模型预测电流控制策略,详细分析了电流更新停滞问题出现的机理,并提出了一种消除电流更新停滞的方法。仿真与实验结果显示,所提方法能够在电机参数未知的前提下,抑制电流更新停滞来实现电机的平稳运行。Permanent magnet synchronous motor(PMSM)has been widely used in industrial production,marine propulsion,and electric vehicle drive systems.To realize the high-performance control of PMSM,the finite control set model predictive current control(FCS-MPCC)algorithm has been applied to the speed control of PMSM by its single control mode and excellent dynamic performance.However,the prediction accuracy of this method largely depends on the accuracy of the mathematical model of the motor.In the actual control system,factors such as the magnetic saturation effect and temperature rise will cause parameter changes in motors,leading to the decline of model predictive control accuracy.The ultralocal model has been proposed as a model-free predictive control algorithm instead of the motor mathematical model to solve the parameter sensitivity problem in the FCS-MPCC algorithm.In this case,the current prediction can be realized by identifying the lumped parameters in the ultralocal model.The current sampling values of three consecutive sampling periods are subtracted successively to obtain the current error values for representing the lumped parameters in the ultralocal model.However,a stagnation problem exists in the current update.The specific phenomenon of this problem is that the phase current waveform appears to have an obvious peak,and the switching state of the inverter is no longer updated in several periods.This paper analyzes the mechanism of this phenomenon and then proposes a suppression strategy based on power factor angle calculation.The phenomenon of the current updating stagnation mainly occurs in the period with small phase current variation amplitude.During the initial several sampling cycles in this period,the current error value is unchanged even if the switching state of the inverter is different,which causes the lumped parameter expression to cross zero.The ultralocal model cannot accurately predict the current.The switching state of the inverter remains unchanged without updating under the inaccuracy pre

关 键 词：永磁同步电机 预测控制 超局部模型 

分 类 号：TM341[电气工程—电机]