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정학근(Hak-Geun Jeong),정봉만(Bong-Man Jung),한수빈(Soo-Bin Han),송유진(Yu-Jin Song),박석인(Sukin Park),김규덕(Kyu-Deok Kim),유승원(Seung-Won Yu) 한국에너지기후변화학회 2008 에너지기후변화학회지 Vol.3 No.1
Since a LED light source does not include the mercury(Hg) or a filament, it is expected as an environmentally friendly next generation Light source with its good reliability and long lifetime. A few ten mW white LED can substitute for the indicator light source, and it is required to study several watt multi-chip semiconductor light sources in order to replace the light sources for general illumination such as incandescent lights and fluorescent lamps. The light sources for illumination have a variety of applications in the indoor and outdoor, and the variation of optical power and color rendition of the light source limits their applications. Therefore, it is necessary to research the LED lamp and its luminaire to minimize the variation of dynamic characteristics due to that illuminating environment.
정학근(Hak-Geun Jeong),한수빈(Su-Bin Han),정봉만(Bong-Man Jung),박석인(Suk-In Park),유승원(Seung-Weon Yu),김규덕(Ku-Oeok Kim) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
에너지 절약과 환경 공해문제 그리고 최근에 부 각되고 있는 지구 온난화 문제 등을 해결하기 위해 고효율, 저공해 발전시스템인 연료전지가 주목을 받고 있다 . 연료전지는 연소과정 없이 화학에너지를 전기 화학적으로 직접 전기로 변환시키는 시스템으로 효율이 높고 공해 물질의 배출이 거의 없기 때문에 매우 이상적인 발전장치이다 연료전지 발전시스템의 최적 제어기 설계를 위해 필요한 운전 조건, 즉 운전 온도, 압력 등의 운전 조건과, 연료 농도, 공급량이 전지의 성능에 미치는 영향에 대한 특성을 분석하였고 이들을 정리하여 최적제어를 위 한 기본 방식을 얻기 위해 이용하였다. 실재 스택에 적용하기 위한 관련 측정시스템과 제어기는 dSPACE-l103과 ControlDesk를 사용하여 구성하였다.
해상용 LED(Light Emitting Diode) 등명기 연구개발
정학근(Hak-Geun Jeong),정봉만(Bong-Man Jung),한수빈(Su-Bin Han),유승원(Seong-Won Yu),김훈(Hoon-Kim) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.5월
A high light lantern system using LEDs is composed of power supply, flash controller, and daylight controller and proper case considering work condition. The performance of developed LED lantern is better than that of the existing marine lantern using an incandescent electric lamp and that of foreign products(Vega LED lantern made in New Zealand, Tideland system made in America). The electric consumption of our products is 30% compared with that of existing marine lantern using an incandescent electric lamp, and the luminous intensity of them is 200% to 400% compared with that of existing marine lantern and foreign LED lantern. In addition, our LED lantern system is easy to repairing something wrong and changing the LED module and other controllers on the sea when they are in accident.
정학근(Jeong Hak-Geun),장철용(Jang Cheol-Yong),조수(Cho Soo) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.1
Since a LED light source does not include the mercury (Hg) or a filament, it is expected as an environmentally friendly next generation light source with its good reliability and long lifetime. A few ten mW white LED can substitute for the indicator light source, and it is required to study several watt multi-chip semiconductor light sources in order to replace the light sources for general illumination such as incandescent lights and fluorescent lamps. The light sources for illumination have a variety of applications in the indoor and outdoor, and the variation of optical power and color rendition of the light source limits their applications. Therefore, it is necessary to research the LED lamp and its lumina ire to minimize the variation of dynamic characteristics due to that illuminating environment.