Zero-Current-Transition Bridgeless PFC Without Extra Voltage and Current Stress

In this paper, a new zero-current-switching high-power-factor (PF) rectifier with pulsewidth-modulation control is introduced. The auxiliary circuit provides soft switching for all semiconductor devices without any extra current and voltage stress on the main switches. The proposed converter is bridgeless, and all semiconductor devices are soft switched. In addition, there is no extra stress on the switches. Thus, the conduction and switching losses are reduced and maximum efficiency is achieved. The converter is designed and simulated, and a prototype is implemented to verify the system performance. The experimental results exhibit high PF and efficiency of the proposed converter.

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