永磁同步电动机单闭环位置伺服系统设计

Design on Single Closed Loop Position Servo System of Permanent Magnet Synchronous Motor

针对三环永磁同步电动机位置伺服系统结构复杂、参数整定困难、抗扰性差等缺点,设计了一种基于自抗扰控制器的单闭环位置伺服系统,将自抗扰控制器的输出直接作为系统期望转矩角,简化了系统结构,提高了系统的鲁棒性;采用基于空间电压矢量调制的直接转矩控制策略,省去了电流控制环及坐标旋转变化,减小电机输出的转矩脉动,仿真实验证明了该系统代替传统三环系统的可行性。

Aiming at the disadvantage of triple closed loops position servo system of PMSM of which the structure is very complex and the parameters are difficult to set and the anti- disturbance is weak,a single closed loop position servo system was proposed based on active disturbance rejection controller（ ADRC）. This system regards the output of ADRC as the expected torque angel so that the structure was simplified and the robustness was improved. The direct torque control strategy based on space voltage vector module was adopted to reduce the torque ripple so the current control loop and axis rotation conversion were leaf out. Through simulation the method that Replacing the triple loops system with single loop is proved to be feasible.