永磁同步电机无传感器启动过程研究

永磁同步电机(PMSM)无感控制启动过程中的转子位置的准确估算,对于电机控制有着重要影响。为此,提出了一种基于双预测控制的永磁同步电机无传感器控制方法。该方法通过使用二阶广义积分器代替带通滤波器作为高频电流提取器,并且通过模型速度预测控制与无差拍电流控制分别代替转速环与电流环中的PI控制器来补偿反馈信号的滞后影响。仿真实验表明,这种方法相对于传统无传感控制能够减少电机启动时估算的误差,并且改善电机启动过程的动态性能。

Research on sensorless starting process of PMSM

The accurate estimation of the rotor position during the start-up process of permanent magnet synchronous machine(PMSM) sensorless control has an important influence on motor control. Based on this, this paper proposed PMSM sensorless control method based on double predictive control. This method used a second-order generalized integrator instead of a band-pass filter as a highfrequency current extractor, and used model speed predictive control and deadbeat current control to replace the PI controllers in the speed delay and current delay to compensate for the feedback signal. Simulation experiments show that this method can reduce the error estimated when the motor start, and improve the dynamic performance of the motor starting process compared with the traditional sensorless control.