Initial position judgment of switched reluctance motors rotor based on high frequency pulse injection
                                                           ZHANG Yi, ZHANG Wei, YAO Shuchun
                                 (Electrical engineering college, Zhejiang university, Hangzhou 310027, China)

Abstract: In order to solve the problems of the traditional switched reluctance motor needs to install the hall position sensor to determine the initial position of the rotor, which not only increases the cost of the system hardware, but also reduces the anti-seismic activity of the system. no hall position sensor with high frequency pulse injection technique for initial rotor position judgment is studied, the improved high frequency pulse wasproposed based on phasephase pulse injection. The initial position judgment algorithm was obtained by comparison of three phase current response amplitude. The accuracy of this method was tested on a 12/8-1.5kW three-phase switched reluctance motor. The results indicate that comparing with the way which use hall signal, the improved high frequency injection method is more accurate upon the determination of the initial position, there are no reversal or other transition process in process of rapid starting from 0 to the initial given speed. the smooth starting of motor can be realized.

Key words: switched reluctance motor; sensorless control; high frequency pulse; initial position judgment