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능동 클램프 ZVS 플라이백 컨버터의 역률개선에 관한 연구
최태영(T.Y.Choi),안정준(J.J.Ahn),류동균(D.K.Ryu),이우석(W.S.Lee),원충연(C.Y.Won),김수석(S.S.Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper analyzed PFC of active clamp ZVS flyback converter by adding two method PFC (Power Factor Correction) circuit - Two-Stage and Single-Stage.<br/> It improves on Flyback converter's disadvantage - loss increasing by switching, noise increasing, high voltage stress of switch - by adding active clamp circuit. Simulation results show to improve the input PF of 300W ZVS flyback converter by adding Single-Stage, Two-Stage PFC circuit.
ZCS 보조회로를 이용한 ZVT Boost 컨버터에 관한 연구
류동균(D.K. Ryu),이우석(W.S. Lee),최태영(T.Y. Choi),서민성(M.S. Seo),원충연(C.Y. Won),김영렬(Y.R. Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.-
Recently, a ZVT boost converter is embedded in a power factor correction system. The control circuit of the converter assures soft-switching for all the MOSFETs and load regulation The PFC system contains additional control circuits which assure the input voltage in a sinusoidal form and feed-forward line voltage regulation. In this paper, a soft switching boost converter with zero-voltage transition(ZVT) main switch using zero-current switching(ZCS) auxiliary switch is proposed. Operating intervals of the converter are persented and analyzed. The proposed results show that the main switch maintains ZVT while auxiliary switch retains ZVT whiles auxiliary switch retains ZCS for the complete specified line and load conditions.<br/> <br/>