A two-phase switched reluctance motor with reduced stator pole-arc

The paper presents analysis of a 4/2 switched reluctance motor design solution with reduced stator pole-arc. The analyzed model is designed to be used in a high-speed (45,000 rpm) drive. The stator pole-arc value change was accompanied by asymmetric structure of rotor magnetic circuit to allow start the motor from any rotor position. Static characteristics of the designed motor have been determined. Based on a field/circuit model, waveforms of currents, voltages, and the electromagnetic torque were determined. Exemplary torque characteristics, current and voltage waveforms were determined in laboratory conditions. Finally, conclusions concerning the designed machine with reduced stator pole-arc were presented.