http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유병우(B.W. Ryu),한정만(J.M. Han),이동욱(D.W. Lee),이종달(J.D. Lee),이병희(B.H. Lee),최성욱(S.W. Choi),문건우(G.W. Moon) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
최근 LCD 모니터, Note PC, 가정용 게임기, Mobile Phone, MP3 등의 소형 전자 제품의 사용이 증가함에 따라 이들 전자제품의 전원 공급에 필요한 다양한 AC/DC 어댑터가 요구된다. AC/DC 어댑터는 밀폐형의 구조를 가지므로, 열적인 문제 때문에 용량과 사이즈가 제한되어 왔다. 하지만 최근에는 소형전자제품의 용량이 점차 증가하고, 더불어 소비자의 휴대성 및 심미적 요구에 부응하기 위하여 소형 및 경량의 고밀도 AC/DC Adapter를 개발하여야 한다. 이를 위해서 높은 수준의 회로 설계 및 방열 기술이 필요하다. 본 논문에서는 Laptop PC에 적용되는 85W급 AC/DC Adapter용 고밀도전원을 개발하고 실험으로 검증하였다.
Shen, T.,Park, K.t.,Choi, J.g.,Moon, B.W.,Koo, J.M.,Seok, C.S. Pergamon Press 2017 Engineering fracture mechanics Vol.169 No.-
<P>The leak-before-break (LBB) concept was usually applied to design and estimate the piping system in nuclear power plant, which is based on the fracture resistance (J-R) curves of nuclear real pipe. However, the real pipe test is costly and difficult. Instead of the real pipe test, the J-R curves of standard specimens suggested in the ASTM El 820 were used. Nonetheless, the J-R curves obtained from the standard specimens are too conservative, owing to the differences in specimen geometries and loading configurations (constraint effect). Thus, in this study the equivalent stress gradient (curved ESG) specimens were developed to evaluate the J-R curves of nuclear real pipes (SA-312 TP304L) precisely. The curved ESG specimens were designed to show the same crack-opening stress gradients as those of the real pipes at the driving force J = J(Ic). The J(Ic) for stainless steel SA-312 TP304L was obtained by the J-R tests on standard compact tension (CT) specimens. Comparison of the J-R curves obtained from the curved ESG specimens and those obtained from the real pipes show that the curved ESG specimen can be used in the LBB concept to design and estimate the piping systems. (C) 2016 Elsevier Ltd. All rights reserved.</P>
3.3㎾ On Board Charger for Electric vehicle
H. J. Chae,W. Y. Kim,S. Y. YUN,Y. S. Jeong,J. Y. Lee,H. T. Moon 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
In this paper 3.3 ㎾ on-board charger is proposed for electric vehicles or plug-in hybrid electric vehicles. Considering the life time of charger, new topology which is not using the high-voltage electrolytic capacitors is proposed. This charger is comprised of two stages that one is boost converter stage for PFC control and the other is uncontrolled LLC resonant converter for galvanic isolation and step-down of voltage. Proposed charger is implemented and it is 7.1 liters in volume and 6.8㎏ in weight. The experimental result indicates 92.5% of the efficiency at input voltage 220Vac and 88.3% at input voltage 110Vac under 3.3㎾ of output power. And the output voltage ranges is from 150V to 450V.
Hgo07Cd0.3Te 박막의 LPE 성장시 성장시간에 따른 표면형상의 변화
김재묵,송원준,서상희,임성욱,최인훈,문성욱 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.2
HgCdTe is the most widely used material for infrared photodetectors. HgCdTe epi-layers were grown on CdTe substrates with (111) orientation, using a slider LPE(Liquid Phase Epitaxy) technique. The change of surface morphology during LPE growth of Hg_(0.7)Cd_(0.3)Te was investigated. The wave-like surface at the initial stage of growth has transformed gradually to the terrace-like surface and the terrace width has increased with increasing growth time. Infrared tansmission was used to determine the composition of HgCdTe epi-layers.
유찬욱(C. U. Ryu),이민우(M. W. Lee),문정하(J. H. Moon),김정렬(J. R. Kim),김정환(J. H. Kim),이영호(Y. H. Lee) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This paper is about structural analysis of globe valve for controling cryogenic LNG's flow or stop in normal temperature. The used valve is demanded safety resist inner pressure and temperature variation cause it uses in cryogenic, high pressure surrounding. This study evaluates for safety resist inner pressure and temperature variation by heat transfer analysis in cryogenic surrounding, heat stress analysis in temperature variation and deformation analysis in high pressure.