An isolated bridgeless AC-DC PFC converter using a LC resonant voltage doubler rectifier |
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Authors: | Sin-woo Lee |
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Affiliation: | 1. Department of Electronic &2. Information Engineering, Seoul National University of Science and Technology, Seoul, South Korea |
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Abstract: | This paper proposed an isolated bridgeless AC–DC power factor correction (PFC) converter using a LC resonant voltage doubler rectifier. The proposed converter is based on isolated conventional single-ended primary inductance converter (SEPIC) PFC converter. The conduction loss of rectification is reduced than a conventional one because the proposed converter is designed to eliminate a full-bridge rectifier at an input stage. Moreover, for zero-current switching (ZCS) operation and low voltage stresses of output diodes, the secondary of the proposed converter is designed as voltage doubler with a LC resonant tank. Additionally, an input–output electrical isolation is provided for safety standard. In conclusion, high power factor is achieved and efficiency is improved. The operational principles, steady-state analysis and design equations of the proposed converter are described in detail. Experimental results from a 60 W prototype at a constant switching frequency 100 kHz are presented to verify the performance of the proposed converter. |
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Keywords: | Bridgeless converter power factor correction resonant converter zero-current switching |
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