中文摘要：

摘要：为了获取无位置传感器伺服系统中永磁直线同步电机的动子位置和速度，采用基于磁链变化的动子位置检测方法，利用两次磁链中值代替传统滤波器来快速消除反电势纯积分造成的磁链漂移现象，并采用死区补偿算法解决低速状态下重构相电压与实际相电压差值较大的问题。以空心式永磁直线电机为研究对象，分析1～5Hz运行时的动子位置估算误差，以及电机参数对动子位置估算结果的影响。通过实验测得当运行速度为3Hz时动子位置估算结果的均方根误差为0．024tad，误差较小。实验结果表明，基于磁链变化的动子位置估算方法能够获得永磁直线电机在低速运行时的动子位置信息。

英文摘要：

Abstract： In order to estimate mover position and speed of permanent linear synchronous motor （PMLSM） without position sensor, position sensing via flux linkage variation had been used. During the calculation, mean value of flux linkage was used twice to eliminate the flux linkage drift caused by open- loop electromotive force （EMF） integration instead of traditional filter, and dead-time compensation algo- rithm was adopted to reduce the difference between calculated and actual phase voltage. Control circuit was built to research air-cored PMLSM, estimation error was analyzed during the operation from 1Hz to 5Hz, and influence of motor parameters like resistance and inductance were analyzed finally. By meas- urement, root mean square error of mover position estimation reduced to 0. 0240 rad at 3 Hz. It is showed mover information of PMLSM could be obtained based on flux linkage variation.