Microcontroller based single-phase SRM drive with high power factor

A novel high power factor drive of an single-phase switched reluctance motor (SRM) is presented. It achieves sinusoidal, near unity power factor input currents. The proposed SRM drive has no additional active switches. And a single-stage approach has a simple structure and low cost. A prototype to drive an SRM equipping a suitable encoder is designed to evaluate the proposed topology. The characteristics and validity of the proposed circuit is discussed with an experimental results.