A basic algorithm of sensorless rotor position detection using fuzzy logic for the switched reluctance motor drives

This paper presents a simple method to estimate in a continuous way the rotor position of the switched reluctance (SR) motor without position sensors. It combines the well-tried flux/current method with basic fuzzy logic systems and a prediction of the position by linear interpolation. The estimation algorithm has been implemented on software under Matlab for a dynamic simulation of the motor drive system. A model of an 8/6 four phases SR motor has been developed for this purpose. The algorithm shows good results under the whole range of motor speed, for different operating conditions (chopping/single pulse mode, start-up/transient operations) in terms of accuracy and robustness.