A Buck-Boost Common Ground Bridgeless PFC Rectifier with Power Decoupling Ability

Abstract

A buck-boost common ground bridgeless power factor correction rectifier (PFC) which can achieve the function of power decoupling has been proposed. The topology realizes the common ground connection between the power grid and the load, so the common-mode current can be completely eliminated. As well as, the converter also has the function of boosting and reducing voltage, which can achieve a wide output voltage range. It is worth mentioning that this converter can achieve the power decoupling function without any electrolytic capacitor or active pulsating-power-buffering. Then, detailed analysis was conducted on the operation mode of the PFC. Finally, the feasibility of this topology was demonstrated through steady-state and dynamic simulation results.