负载扰动下永磁同步电机控制系统设计与仿真

在高精密定位领域中,永磁同步电机外部负载连续波动或者突变对电机的输出精度和稳定性有着不可忽略的影响。为提高永磁同步电机在负载扰动工况下的输出精度和工作稳定性,提出了一种包含位置环、转速环以及电流环的三闭环控制策略,并采用高阶系统降阶方法简化了控制系统传递函数,根据控制系统动态响应要求确定了各控制器参数。利用仿真软件建立了电机和控制系统仿真模型并进行了仿真,仿真结果表明,采用三环控制策略有效的提高永磁同步电机在负载扰动工况下的输出精度以及工作稳定性。

Modeling and Simulation for Control System of Permanent Magnet Synchronous Motor under Load Disturbance

In the area of high precision positioning, the variable external load has a serious impact on the output accuracy and stability of permanent magnet synchronous motor. In order to improve the output precision and working stability of motor, the three-closed-loop control system for the PMSM which contains position-loop, speed-loop and current-loop was proposed. The transfer function of control system was simplified using high-order system reduction methods and the reasonable controller parameters were determined according to analysis the transfer function. The simulation model of motor and control system was established and the simulation experiment was carried out. The results getting by simulation shows that this control strategy can improve motor’s output precision and stability when PMSM working at load disturbance.