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소프트 스위칭 모드에 의한 고역률의 AC-DC 강압형 컨버터 토폴로지
문상필(S.P. Moon),서기영(K.Y. Suh),전중함(J.H. Chun),김영철(J.H Kim),김준홍(Y.C Kim),이현우(H.W. Lee) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
This paper propsed that a AC-DC Converter topology of high power factor with soft switching mode operates with four chopper conoecting a number of parallel ciruit. To improve these, a large number of soft switching topologies included a resonant circuit have been proposed. And. some simulative results on computer is included to confirm the validity of the analytical results. The partial resonant circuit makes use of a inductor using step up and a condenser of laos-less snubber. The result is that the switching loss is very low and the efficiency of system is high. And the snubber condenser used in partial resonant circuit makes charging engergy regenerated at input power source for resonant operation. The proposed conversion system is deemed the most suitable for high power applications where the power switching devices are used.
박경원(K.W. Park),김영철(Y.C. Kim),김준홍(J.H. Kim),서기영(K.Y. Su),고희석(H.S. Koh),이현우(H.W. Lee) 한국조명·전기설비학회 1997 한국조명·전기설비학회 학술대회논문집 Vol.1997 No.-
Power conversion system must be increased switching frequency in order to achieve a small size a light weight and a low noise. However, the switches of converter are subjected to high switching power losses and switching stresses. As a result of those, the power system brings on a low efficiency. In this paper, the authors propose a DC-DC boost converter of high power by partial resonant switch method (PRSM). The switching devices in a proposed circuit are operated with soft switching and the control technique of those is simplified for switch to drive in constant duty cycle. The partial resonant circuit makes use of a inductor using step up and a condenser of loss-less snubber. Also the circuit has a merit which is taken to increase of efficiency, as it makes to a regeneration at input source of accumulated energy in snubber condenser without loss of snubber in conventional circuit. The result is that the switching loss is very low and the efficiency of system is high. The proposed converter is deemed the most suitable for high power applications where the power switching devices are used.