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고강훈(Kang-Hoon Koh),김천식(Chun-Sik Kim),김수용(Soo-Young Kim),박정우(Jung-Woo Park),고희석(Hee-Suk Koh),이현우(Hyun-Woo Lee) 한국조명·전기설비학회 2000 한국조명·전기설비학회 학술대회논문집 Vol.2000 No.-
This paper is a study if remote control system with KEN that is not only superior-manufacture ability-hardware; that is to say, the hardware is HMI/SCADA solution and it has been developed to sub-station and power management system, which is easy, fast and suitable for users to work with, but also compatible solution with domestic environment. Futhermore, the hardware has been developed by completely domestic technology with knowledge from various actual experiences. In the long run, for uninterruptible power supply to train, building, and factory, real time tele-supervisory control to power facilities.
전류불연속 제어의 새로운 PFC 스텝-업 AC-DC 컨버터
곽동걸(Dong-Kurl Kwak),김춘삼(Choon-Sam Kim),김천식(Chun-Sik Kim),이현우(Hyun-Woo Lee) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper is studied on a novel step-up AC-DC converter of power factor correction (PFC) by discontinuous current control. The converter operated in discontinuous current control eliminates the complicated circuit control requirement, and reduces a number of components. The input current waveform in proposed circuit is got to be discontinuous sinusoidal form in proportion to magnitude of ac input voltage under the constant duty cycle switching. Therefore, the input power factor is nearly unity and the control circuit is simple. Also the switching devices in a proposed circuit are operated with soft switching by the partial resonant method. The result is that the switching loss is very low and the efficiency of system is high. The partial resonant circuit makes use of a inductor using step up and loss-less snubber capacitor. The circuit topology of the converter is simplified. Some simulative results on computer and experimental results are included to confirm the validity of the analytical results.