• Title/Summary/Keyword: KAIST

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고효율 더블 엔디드 능동 클램프 영전압 스위칭 포워드 컨버터 (High-efficiency Double-ended Active Clamp ZVS Forward Converter)

  • 김정은;강정일;한상규;문건우
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 추계학술대회 논문집
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    • pp.124-128
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    • 2001

  • In this paper, a high-efficiency double-ended active clamp ZVS forward converter is proposed. This converter can be used in compact size AC/DC converter applications such as a notebook adapter. The principles of operation are described and the zero voltage switching characteristics are analyzed. High efficiency of this converter is verified by the experimental results.

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Bubble occurrence and interhemispheric plasma transport

  • Park, Jaeheung;Lee, Jae-jin;Lee, Ensang;Min, Kyoung-Wook
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2004년도 한국우주과학회보 제13권1호
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    • pp.72-72
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    • 2004

  • We have compared here the seasonal average of the plasma density with the EPB occurrence in a given longitude sector, using KOMPSAT-1 and DMSP data. It could be evidenced on a global scale that the EPB occurrence was nearly anti-correlated with the poleward drift speed parallel to B-field, and with the degree of asymmetry of the latitudinal plasma distribution. But, the seasonal-longitudinal change of the asymmetry was different from what the current theory expected. (omitted)

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