A New Passive Snubber for Improvement of Efficiency in Soft Switched Boost PFC Converter for Battery Charging Systems
نویسندگان
چکیده
This paper proposes a new passive snubber for enhancing the power conversion efficiency on a single phase ac-dc power factor correction (PFC) converter based on boost topology for battery charging systems. Soft switching can be achieved in the proposed converter with the proposed auxillary passive snubber circuit which is added to the conventional boost PFC converter. The converter switch is provided with zero current switching turn ON. The converter is analysed in the continuous conduction mode. The proposed converter achieves high input power factor, low line input current harmonics, simple control and soft switching at turn ON. Contrasted with the conventional boost converter, the proposed PFC boost converter has lower switching stresses and higher voltage gain. The new prototype of 100 W / 20 kHz, 40 V dc output with 24 Vac input is verified experimentally with an efficiency of 96% with near unity power factor.
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