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RISS 인기검색어
- 검색키워드
- 저자 : 김은수(E.S Kim) (검색결과 160 건)
- 무료
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김은수(E S. Kim),최해영(H Y. Choi),조기연(K Y. Joe),김윤호(Y H. Kim) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
In this paper, an improved soft switching forward dc/dc converter is proposed. The proposed converter is constructed by using non-dissipate snubbers in parallel with the main switch and output diode of the conventional forward converter. Due to use of the non-dissipative snubbers, the proposed converter achieves zero-voltage switching for all switching devices and output diodes without switching losses. The complete operating principles and experimental results will be presented.<br/> <br/>
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무손실 스너버 적용 소프트 스위칭 Forward 컨버터
김은수(E S. Kim),김태진(K Y. Joe),최해영(T J. Kim),조기연(H Y. Choi),김윤호(Y H. Kim) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
To achieve high efficiency in high power and high frequency applications, reduction of switching losses and noise is very important. In this paper, an improved soft switching forward converter is proposed. The proposed converter is constructed by using non-dissipative snubbers in parallel with the main switch and output diode of the conventional forward converter. Due to the use of the non-dissipative snubbers in the primary and secondary, the proposed converter achieves zero-voltage and zero-current switching for all switching devices without switching losses and output diode recovery losses. The complete operating principles, theoritical analysis, experimental results will be presented.
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김은수(E.S Kim),이현관(H.K Lee),송정민(J.M Song),김병수(B.S Kim),차인수(I.S Cha) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
An 8㎾ L-Type boost dc/dc converter using a non-dissipative snubber is presented. L-Type boost converter is used to increase low input voltage (24VDC) to the isolated high output voltage (250VDC) and is selected because of its low switch counts, low conduction loss, simple transformer structure with low turns ratio and easy operation. In addition, due to the use of a non-dissipative snubber on the primary side, a L-Type boost converter has a significant reduction of switching losses in the main switching devices. he complete operating principles, analysis and experimental results in this paper are described.
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텝인덕터와 스너버 캐패시터를 이용한 영전압 영전류 스위칭 DC/DC 컨버터
김은수(E.S.Kim),변영복(Y.B.Byun),조기연(K.Y.Joe),김태진(T.J.Kim),김윤호(Y.H. Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
The conventional three-level high frequency phase-shifted dc/dc converter has a disadvantage that a circulating current flows through transformer and switching devices during the freewheeling interval. Due to this circulating current and RMS current stress, conduction losses of transformer and switching devices increases. To alleviate these problems, we propose an improved three-level Zero Voltage and Zero Current Switching (ZVZCS) dc/dc converter using a tapped inductor, a snubber capacitor and two snubber diodes attached at the secondary side of transformer. The proposed ZVZCS converter is verified on a 10 kW, 30kHz experimental prototype.
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김은수(E.S Kim),윤광호(G.H Yoon),강성인(S.I Kang),차인수(I.S Cha) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
Recently, new technologies of the PCS (Power Conditioning System) for energy generating using solar cells or fuel cell are required for smaller unit with low cost and high performance. In this paper, the proposed high frequency AC linked DC/AC converter which consisted of LLC resonant and LF cycloconverter is presented, described and verified through the experimental results of 1㎾ PCS.
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김은수(E.S. Kim),구대현(D.H. Goo),김종무(J.M. Kim),강도현(D.H. kang),신병철(B.C. Shin),공영수(Y.S. Kong),양승철(S.C. Yang) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
A contact-less power supply system (CPS) allows electrical energy to supply to mobile consumers without any electrical or mechanical contact. CPS works in the same principle as a transformer, With the track litz cable forming the primary circuit and the pickup as the secondary The track power supply generates the high frequency altemating current in the track cable The captured AC magnetic field generated by the track conductors produces electrical energy m the pickup coil and the pickup rectifier converts the high frequency AC power to DC while regulating the power to the load. This paper presents the theoretical analysis, simulation and experimental results of the series-parallel resonant converter working as contact-less power supply system
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