• 제목/요약/키워드: E-J power

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The operating system of high-power LED module with back-boost mode (Back-Boost 방식 고출력 LED 구동시스템)

  • Chung, J.H.;Song, S.G.;Choi, J.H.;Park, S.J.;Moon, C.J.
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.682-686
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    • 2005

  • Recently the study is being addressed on the energy economy as greatly as possible. The researches on light source that have higher efficiency than the exiting are performing. The high-power LED is the representative one among those. There are two fields in the research on the high-power LED, the ordinary illuminating apparatus and the night illuminating apparatus using wind and solar energy. In this paper, we validated the probability of using high-power LED as illuminating apparatus and proposed the novel LED power equipment that has more stability and better efficiency than the exiting method. By using the propose method the -R-E-A-C-T is reduced and the efficiency improved.

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High voltage pulse power supply using thyratron (Thyratron을 이용한 고압펄스 발생장치)

  • Kim, T.J.;Kim, S.C.;Kim, E.S.;Baek, J.W.;Pavlov, E.P.;Lee, H.S.;Jeon, S.J.
    • Proceedings of the KIEE Conference
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    • 1998.07f
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    • pp.2127-2129
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    • 1998

  • In this paper, discharging part of high voltage pulse power supply of E-beam generating device is simulated and experimented. It is composed of high voltage part and high voltage pulse part. High voltage part is AC 380, DC/DC converter, high voltage high frequency transformer. High voltage pulse part is double pulse forming network and Thyratron. In the result, computer simulation analysis is same to experimental result and high voltage pulse is obtained 10kV, 4A, 10uS.

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The Control Characteristics of Haenam-Cheju HVDC system at Ground Fault and Steady State (해남-전주 HVDC 계통의 정상상태 및 지락 고장시 제어특성)

  • Kwak, J.S.;Woo, J.W.;Shim, E.B.
    • Proceedings of the KIEE Conference
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    • 1999.07c
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    • pp.1331-1333
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    • 1999

  • In Haenam-Cheju HVDC link several modes of operations and controls are provided, which are constant frequency control, constant power control and constant current control. This paper describes basic control action of converters under three control modes and shows EMTDC simulation results at ground fault and steady state respectively.

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Performance Analysis and Degradation Characteristics of NCM LIB for ESS (ESS용 NCM계 LIB의 설계인자별 성능분석 및 열화특성 연구)

  • Kwon, S.J;Park, E.Y;Lim, J.H;Choi, J.H;Kim, J.H
    • Proceedings of the KIPE Conference
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    • 2018.07a
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    • pp.219-221
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    • 2018

  • ESS용 NCM계 $LIB(Li[Ni_xCo_yMn_z]O_2)$의 양극 전이금속 설계인자 조성비(x:y:z)를 5:2:3, 6:2:2로 달리하여 제작한 전지를 사용하여 C-rate별 방전시험을 통한 기본성능평가를 진행하였고, 가속열화 시험을 통한 수명특성을 분석하였다. EIS(Electrochemical Impedance Spectroscopy) 실험을 통하여 전지의 임피던스를 확인하였고, 열화되지 않은(Fresh) 전지와 열화된(Aging) 전지의 SOC(State-of-Charge)별 임피던스 특성을 비교 분석하였다.

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