Research on Startup of Synchronous Reluctance Motor Based on Square Wave Injection

For the position sensorless vector control of synchronous reluctance motor, the starting performance affects the control effect at medium and high speed. In order to improve the overall control effect, it is necessary to improve the starting performance. This paper studies and improves the starting effect of synchronous reluctance motor. Taking advantage of the salient pole characteristics of the synchronous reluctance motor rotor structure, the method used in this paper is the high frequency square wave injection method. By injecting a high frequency square wave voltage signal, the rotor position information is obtained from the high frequency response current. The method can accurately estimate the rotor position at zero and low speed, and realize the reliable starting of the synchronous reluctance motor. The simulation results show that the method improves the startup effect of the synchronous reluctance motor and verifies the correctness of the control algorithm.