低速永磁直线电动机的稳定性分析及其控制方法研究

Study on stability and controlling of low-speed permanent magnet linear synchronous motor

在对低速永磁直线同步电动机的力角特性进行分析的基础上,确定了该电机的稳定工作区,得到了永磁直线同步电动机的稳定控制方法,即可通过改变电压和频率来实现低速永磁直线电动机的失步预防控制.实验结果表明,该方法具有算法简单、控制品质好等优点,可以有效地提高永磁直线同步电动机的稳定性,避免电机失步的发生.

Based on the analysis of power angle characteristics in the low - speed permanent magnet linear synchronous motor （PMLSM） , the motor steady operation sections is determined. The basic methods to prevent out of step for the low - speed PMLSM are obtained, which are through changing the voltage and frequency to realize motor out - of- step preventive control. Experimental results show that the method is simple and high quality. It can improve the stability of PMLSM effectively and avoid out- of-step occurrence.