两种高频信号注入法与坐标系结合的无位置传感器运行研究

摘要

Based on the saliency tracking idea,the rotating high-frequency current signal injected into the estimated synchronous rotating coordinate system and the high-frequency pulsating current signal injected into the two-phase stationary coordinate system,which were used in permanent magnet synchronous motor operation control system without position sensor were discussed.The mathematical models of two new high-frequency injection method in rotor position estimation strategy were presented and the spatial position of the rotor demodulation principles using the two new combined high frequency injection method were established.Comparative study of simulation results showed that the pulsating high-frequency current signal injection method combination with the two-phase stationary coordinate system had simpler control structure system and better performance of rotor position estimation.%基于空间凸极效应的原理,讨论了采用旋转高频电流信号注入到估计的同步旋转坐标系,以及脉振高频电流信号注入到两相静止坐标系中,在永磁同步电机(PMSM)无位置传感器运行控制中的应用.分别给出了两种新结合的高频注入方法的转子位置估计数学模型,指出了获取转子空间位置的解调方法,并应用这两种新结合的高频电流信号注入方法,建立了PMSM无位置传感器矢量控制系统的仿真模型,并进行了仿真比较.仿真结果表明,采用脉振高频电流信号注入与两相静止坐标系结合的方法,具有易于实现的系统控制结构和更优的转子位置估计性能.