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넓은 입력 전압 범위를 가지는 벅-통합형 LLC 공진형 컨버터
유찬훈(Chan-Hun Yu),김형석(Hyoung-Suk Kim) 한국조명·전기설비학회 2018 조명·전기설비학회논문지 Vol.32 No.12
Half-Bridge (HB) LLC converter has low efficiency in wide input range because of large conduction and switch turn-off losses in the primary side caused by small magnetizing inductance (L<SUB>m</SUB>). In this paper, a buck-integrated LLC resonanat converter is proposed for high efficiency server power supply in the HVDC distribution system with wide input range. The proposed converter has higher efficiency than conventional converter because of the large L<SUB>m</SUB> which causes reduced conduction and switch turn-off losses. Moreover, it can be easily integrated by using conventional CLC output filter. To confirm the operation, features, and validity of the proposed converter, a 260V-400V input (nominal input = 336V) and 12V/750W output laboratory prototype is built and tested.