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

Abstract：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.

Keyword：low-speed permanent magnet linear synchronous motor;characteristics of power angle;stability;controlling method;