摘要
不同的PWM调制方式对永磁同步电动机伺服系统性能有较大影响,而且当PI控制器参数固定时,位置(角度)给定值的大范围变化,会导致实际位置发生超调。以磁链、转矩闭环的电机矢量控制方法为基础,提出磁链跟踪控制(Space Vector PWM,SVPWM)和电流滞环跟踪控制的永磁同步电动机矢量控制系统仿真模型,高度模拟实际系统,在不同的位置(角度)给定下,进行了系统性能的对比分析,提出了新型的、简单有效的PI控制器。仿真结果表明磁链跟踪控制可以有效地减小电流和转矩的脉动,改善系统的动静态性能。新型的PI控制器作为位置处理器,使控制系统在位置(角度)给定快速大范围变化时,自动调节控制器PI参数,有效地抑制位置超调问题,并且使系统具备了快速动态响应和高稳态精度的理想控制效果。
Different PWM methods have an important effect on the performance for PMSM servo system.When the parameter of PI controller is invariable and the position(angle) reference is changed in large range,the real position will overshoot.Based on the closed loop of flux and electromagnetic torque in PMSM vector control systems,Simulation models of PMSM vector control systems with space vector PWM(SVPWM) method and current hysteresis tracking control method are proposed and realized.The models simulate real system highly and are contrasted and analyzed in performance for system by different position(angle) reference,the a new and effective PI controller is proposed.The simulation results show that the impulsive motion of current and electromagnetic torque can be decreased availably,and performance of dynamic and static condition for system can be improved by SVPWM method.As position controller, while position reference is changed in large range,the parameters of new PI controller are regulated automatically.Over control is restrained availably,and the new controller makes the servo system get satisfied effect of fast dynamic response and high accuracy of steady state.
出处
《控制工程》
CSCD
北大核心
2009年第S1期192-196,共5页
Control Engineering of China
