摘要
为了改善矢量控制永磁同步电动机(PMSM)的d、q轴定子电流动态性能,介绍了一种应用于小电感永磁同步电动机的时间最优控制与PI混合式(TOC-PI)电流控制策略。基于时间最优控制(TOC)理论,推导出控制d、q轴电流的最优开关曲线;基于该曲线及电流误差获取d、q轴电压,从而使得d、q轴电流以最短时间到达给定值;利用模糊开关在TOC和PI控制间切换,以减小TOC控制稳态电流脉动。仿真及实验结果证明了这种控制方法比PI控制具有更好的动态性能,同时也改善了TOC控制的稳态性能。
A hybrid current control strategy was proposed for a vector-controlled PMSM drive to improve the d-q axiscurrent dynamics performance. Time optimal control （TOC） was employed to derive the time-optimal switch solution. Rea-sonable distribution d-q axis voltage was achieved by allowing the d-q axis current to converge in the shortest time to thegiven value. Control switching between the TOC and PI was realized by using fuzzy switch. The large current ripple problemwas reduced by using TOC control. The results of simulation and experiment show that this control method has better dynam-ic performance than the PI control,and the TOC control of the steady-state performance is improved.
出处
《微特电机》
北大核心
2014年第2期46-49,共4页
Small & Special Electrical Machines
关键词
永磁同步电动机
时间最优控制
混合式控制
电流控制
permanent magnet synchronous motor
time-optimal control（TOC）
hybrid control
current control
