Sensorless control of two-phase switched reluctance drive in the whole speed range

This paper deals with the variable structure control system which implements sensorless control for two-phase switched reluctance drive. The sensorless control method based on flux linkage estimation is considered. The method of the automatic angle adjustment was proposed for the optimization of the motor efficiency on various speeds and loads. Finally the sensorless control strategy for zero and low speeds was developed which is based on the estimation of the inductance in the switched off phase, using interrupted current mode in the flux linkage observer. Proposed solutions are followed by the experimental results which show their effectiveness.