A flat bottom driving method for the full-bridge driven switched reluctance motor

Abstract

This paper proposes a flat bottom driving method for a switched reluctance motor (SRM) by using a full-bridge power converter. Based on a ring structure, an SRM is able to be driven by a full-bridge inverter. With the proposed driving topology, by adding harmonics in the sinusoidal current waveform from the space vector PWM (SVPWM) driving method, the flat bottom current waveform can be generated for driving an SRM. According to the theoretical analysis and calculation, the flat bottom method reduces the copper loss, compared to the SVPWM driving method. The proposed driving topology and flat bottom method are tested by simulation and experimental system, of which the results are compared to that of the SVPWM driving method. The comparison shows that the flat bottom driving method contributes to the reduction of SRM copper loss, and the simulated results match the experimental results well.