摘要
永磁伺服系统采用的隐极式永磁同步电机(PMSM)存在参数未知或失配时电流控制性能下降和开关损耗增大的问题,因此提出加权型成本函数驱动的无模型预测电流控制(MFCC)策略。首先,针对电气参数未知或失配的问题,采用以电流误差变化速率为输入量的最小二乘法对电机参数分组辨识。然后应用比例积分微分(PID)控制原理设计权重系数调节器,完成对成本函数中电流成本和开关成本自调节。最终,实验结果表明该方法能减少电流成本,提高电流控制性能和系统鲁棒性,能减少开关成本,使开关频率和开关损耗下降。
The permanent magnet synchronous motor(PMSM)used in servo system has the problems of current control performance degradation and switching loss increase when parameters are unknown or mismatched,so the weighted cost function model-free predictive current control(MFCC)strategy is proposed.Firstly,to solve the problem of unknown or mismatched parameters,the recursive least square method based on the rate of change of current error is used to identify the motor parameters.Then,the weight coefficient regulator is designed by applying the principle of proportional integral differential(PID)control to adjust the current cost and switch cost in the cost function.Finally,the experimental results show that the proposed method can improve the system robustness and reduce the switching loss on the basis of improving the current control performance.
作者
闵琦
张懿
陈冠廷
MIN Qi;ZHANG Yi;CHEN Guan-ting(Jiangsu University of Science and Technology,Zhenjiang 212000,China)
出处
《电力电子技术》
2024年第1期23-26,56,共5页
Power Electronics
基金
国家自然科学基金(51977101)
江苏省重点研发计划产业前瞻性与共性关键技术重点项目(BE2018007)。
关键词
永磁同步电机
成本函数
开关频率
permanent magnet synchronous motor
cost function
switching frequency
