基于锁相环的永磁同步电机无传感器位置检测

摘要

Sensorless control strategy for permanent magnetic synchronous motor(PMSM) has become a hot research point.The existent sensorless control algorithm is complicated and have a large calculation.To simplify the sensorless position detection algorithm,the module of PMSM is analyzed,a method that uses the motor's three-phase current to calculate the rotor's position is proposed.The module of phase-locked loop is used to eliminate the noise that caused by the calculation.This method uses the three-phase current to directly calculate the rotor's position and the module and the calculation is very simple.Simulation and experimental results verify the effectiveness of the method.%永磁同步电机(PMSM)无位置传感器控制已经成为一个研究热点,现有无传感器位置检测算法复杂,计算量大.为了简化PMSM无传感器位置检测算法,在分析电机模型的基础上,提出了一种利用三相定子电流估算转子位置的方法,同时采用锁相环(PLL)以消除位置估算噪声的影响.该方法直接利用采集的三相电流进行转子位置估算,模型简单,计算量少.仿真和实验结果验证了所提方法的有效性.