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넓은 입/출력 전압 이득 특성을 갖는 고효율 및 고전력밀도 전기자동차용 다중 모드 LDC
남경훈(Kyung-Hoon Nam),정준봉(June-Bong Jeong),금문환(Moon-Hwan Keum),한상규(Sang-Kyoo Han) 전력전자학회 2021 전력전자학술대회 논문집 Vol.2021 No.7
본 논문에서는 고효율 및 고전력밀도 회로에 적합한 LLC 공진형 컨버터를 넓은 전압 이득 특성이 요구되는 전기 자동차용 LDC(Low voltage DC-DC Converter)에 적용하기 위해 Two Switch Buck-Boost 컨버터(TSBB)와 LLC 공진형 컨버터로 구성된 회로를 제안한다. 또한 제안 회로는 입력 전압과 출력 전압의 조건에 따라 Buck Mode, Direct Mode, Boost Mode 총 3가지 모드 중 하나로 동작하며 넓은 입/출력 전압 범위에 대해 고효율을 달성할 수 있는 제어기법을 제안한다. 이러한 제안 회로와 제어기법의 우수성을 검증하기 위해 5kW/L의 전력밀도를 가지는 900W급 시작품을 제작하여 실험적으로 검증하였다.
남경훈,이강업,진경돈 대한건축학회 2003 대한건축학회논문집 Vol.19 No.2
This study considered the characteristics of Gian Lorenzo Bernini's inclusive architecture by means of the iconological interpretation of the relationship between his architecture and sculpture. There have been many studies of Bernini's sculpture and architecture apart, and it is the fact that especially studies of his architecture have remained at stylistic one. However it is not so much difficult to find the ensemble made by symbolic relationship between architecture and sculpture in Bernini's works. Therefore this study introduced Erwin Panofsky's Iconology methodologically to analyze his architectural works and to show that they could be interpreted from sculpture added to architecture. According to iconological analyses about Bernini's Sant' Andre al Quirinale and Scala Regia, followings were investigated. Firstly, The sculptures added to each architectural space are not simple baroque decorations but project symbolic meanings such as the religious symbolism, the historicity of site, and the needs of the time. Secondly, each architecture and sculpture organize spatial characteristics in harmony by means of the projected symbolic meaning. Thirdly, the motive which make him add many sculptures to architectural space are neo-platonism, city planning of Baroque, and political reasons which reinforce the papacy.