基于改进PI电压前馈补偿型电流控制器和MRAS的永磁同步电动机无传感器控制技术

Sensorless Control Technology of PMSM Based on Improved PI Voltage Feed-Forward Compensation Type Current Contoller and Model Reference Adaptive System

根据模型参考自适应理论,对永磁同步电动机进行在线转速估算,针对传统的电流PI控制器的精度问题,提出了改进的PI电压前馈补偿型电流控制器,即以永磁同步电动机的数学模型为基础,采用MRAS和改进的PI电压前馈补偿型电流控制器,进行在线的速度估计。仿真结果表明,采用MRAS和改进的PI电压前馈补偿型电流控制器,其速度误差小,收敛速度快,鲁棒性好。

According to the model reference adaptive theory, the speed of permanent magnet synchronous motor is estimatedd. For the accuracy of the conventional PI controller, it is proposed as an improved voltage feed-forward compensation type PI current controller. The paper is based on mathematical model of permanent magnet synchronous motor using MRAS and improved PI voltage feed-compensated current controller. Simulation results show that the speed error is small, fast convergence and good robustness.