Yasser Gaber A. Dessouky
Sensorless detection of rotor position in switched reluctance motors
This paper introduces a new sensorless rotor position detection technique for switched reluctance motor drives. Two unexcited phases are probed simultaneously with fixed length current pulses from the main converter and the resultant current magnitudes are used to determine the rotor position, independent of motor parameters. The operation of the new technique is explained and the drive system is detailed. The technique is applicable to SR motors of phase number of four and greater. The sensing circuit is modelled, and theoretical and experimental results are presented.