基于锁相环原理的永磁同步电机无传感器控制方法

Sensorless Control Method of Permanent Magnet Synchronous Motor Based on Principle of Phase-Locked Loop

研究了一种基于锁相环原理的转子位置估计方法。该方法的实际转子位置与估计转子位置间的比较环节相当于锁相环模型中的鉴相器,从转速到转子位置的一次积分相当于锁相环模型中的压控振荡,通过系统输入信号和输出信号之间的误差来调整电机的转速。仿真结果表明采用该转子位置和转速估计的PMSM无传感器矢量控制系统表现出较好的动静态性能,基于锁相环原理的PMSM调速系统具有优良的性能。

A rotor position estimation method based on the principle of phase-locked loop was studied. In the method,compare link between actual rotor position and the estimated rotor position was equivalent to the phase detector in the phase-locked loop model and an integral from speed to the rotor position was equivalent to the voltagecontrolled oscillator phase-locked loop model. The speed of the motor was adjusted through the error between the input signal and the output signal of the system. The simulation results showed that sensorless permanent magnet synchronous motor vector control system which used the rotor position and speed estimation showed good performance.