针对零低速下永磁直线同步电机（PMLSM）的无位置传感器控制方法存在精度低、稳定性差、算法复杂等问题，提出了一种改进的脉振高频注入法的无位置传感器控制方法。在利用PMLSM饱和凸极性进行初步位置估计的基础上，提出了特殊位置校正和磁极判断的方法，从而简便地获得较为准确的动子位置，实现PMLSM零低速下的无位置传感器运行。在此基础上，利用Simulink对PMLSM无位置传感器控制进行仿真建模，并搭建样机试验平台进行试验验证。通过仿真和试验结果表明，所提方法可以准确、快速地检测出PMLSM动子初始位置和低速运行时的动子位置，保证电机平稳起动运行，且具有良好的位置估计精度和动态性能。

There are problems of low precision, poor stability and algorithm complexity in the sensorless control of permanent magnet linear synchronous motor (PMLSM) at standstill and low speed. In order to solve these problems, an improved sensorless control method based on pulsating high frequency injection is proposed. Based on the preliminary position estimation using saturation saliency of PMLSM, the method of special position correction and magnetic pole judgment is proposed. In this way, more accurate mover position is obtained and the sensorless operation of PMLSM at standstill and low speed is realized. On this basis, the model of PMLSM sensorless control is established by Simulink, and a prototype experimental platform is built for experimental verification. The simulation and experimental results show that the proposed method can accurately and quickly detect the initial position of PMLSM mover and the mover position at low speed, ensure the smooth starting and running of the motor, and have good position estimation accuracy and dynamic performance.

国家自然科学基金项目（51607091）