TANG Guang xue, ZHU Xue zhong, ZHANG Lei

(Automatic Department，University of Aeronautics and Astronautics，Nanjing 211106, china)

Abstract: Aiming at the problem that the structure complexity was increased, and the cost of the system was raised, and the reliability was decreased by introduction of the position sensors of the switched reluctance motor, a new sensorless control based on sliding mode observer of switched reluctance motor was proposed: five point magnetic chain model was used, combining with sliding mode observer for rotor position sensorless control. In this method, the speed and position of rotor were taken as state variable and the deviation of measured flux linkage and estimated flux linkage was taken as sliding mode face, a sliding mode observer was constructed to detect the position of rotor indirectly. Then, 12/8 pole switched reluctance motor simulation model was built using Matlab simulation software, and simulation research on switched reluctance motor was carried out in Simulink environment. The results indicate that the sensorless control method can effectively estimate the speed and the position of the rotor: small measurement error of the position of the rotor, good robustness and anti interference ability, also dynamic performance.

 

Key words: switched reluctance motor; position sensorless control; sliding mode observer; five point magnetic chain model