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method for reducing the switching losses of an asymmetric half-bridge converter for a three-phase,

12/8 switched reluctance motor operated in low speed. In particular, this study aims to reduce the switching-off losses of chopping

switches in the converter when operated in the current regulated mode (chopping mode). The proposed method uses the mixed

parallel operation of IGBT (chopping switch) and MOSFET (auxiliary switch). MOSFET is precisely controlled to momentarily

conduct prior to the turn-off interval of the IGBT. Consequently, the voltage across the switches is clamped to approximately zero,

substantially decreasing the turn-off switching losses. The analytical expressions of power losses are extensively elaborated.

Compared with the conventional asymmetric half-bridge converter, the modified converter can effectively minimize the switching

losses. Therefore, the efficiency of the converter is eventually improved. Computer simulation and experimental results confirm the

effectiveness of the proposed technique.