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구동방법에 따른 세라믹 메탈 할라이드 램프의 전기적 및 방전특성 분석
장혁진(Hyeok-jin Jang),양종경(Jong-Kyung Yang),김남군(Nam-Gon Kim),박대희(Dae-Hee Park) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
The use of arc tubes made of ceramic material further enhanced some of the metal halide lamp's properties. These properties translate into higher efficacy with better color rendering, stable color through lamp long life. Recently, due to an increase in the application of the ceramic metal-halide lamp, the study for the property etc. according to Ballast's driving scheme and the study for arc tube material, optimization of gas and so on are being proceeded to improve the property of the lamp. Especially, to control ceramic metal-halide lamp, the vigorous study and practical use with respect to Electronic Ballast, which has been improved in the disadvantages of the conventional Magnetic Ballast are made. In this paper, Electrical characteristics and gas insulation destroy time are analyzed by comparing magnetic ballast with electronic ballast.
메탈핼라이드 램프용 세라믹 방전관의 구조적 열적 특성에 관한 연구
장혁진(Hyeok-Jin Jang),노재엽(Jae-Yeop Rho),신상욱(Sang-Wuk Shin),권기태(Kwon-Ki Tae),황명근(Myung-Keun Hwang) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
본 논문에서는 가속열화를 통하여 원통형 방전관을 지닌 세라믹 메탈헬라이드 램프의 신뢰성 및 성능저하의 요인을 알고 이를 뒷받침할만한 실험적 데이터를 통해 조명 설계시 기초자료로서 활용하고자 한다. 이 연구를 위해 원통형 세라믹 메탈헬라이드 램프를 선정하고, RS C0085를 기반으로 하여 ON/OFF(20분/20분)을 실시하여 세라믹 방전관의 구조적 열적 특성을 분석하였다. 그 결과, 전극의 심한 휘어짐이 발생하였고 전극과 봉입물들간의 화학적 재결합으로 인해 텅스텐의 증기압 저하와 요오드화합물의 증기압 상승으로 인한 압력의 평형이 이루어지지 않아 전극 주변의 온도분포의 변화가 심하게 발생하였다.
세라믹 메탈할라이드 램프의 전자식 안정기에 따른 전기적 및 광학적 특성에 관한 연구
장혁진(Hyeok-jin Jang),김남군(Nam-Goon Kim),이주호(Lee Joo Ho),양종경(Jong-Kyung Yang),박대희(Park Dae Hee) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.10
In recent. ceramic metal halide lamps that use the ceramic in arc tube material have the advantage of high rendering index, high efficacy, long life. According to increase applications, the research continue to improve various factor that is arc tube material, optimization of gas and metal halide. In oder to improve system characteristics of CMH Lamp with ceramic arc tube, when operating CMH lamp with magnetic and electronics ballast, we compared with electrical, optical characteristics in this paper.
물리학적 장의 개념을 통한 건축과 풍수 배치원칙의 조응관계 분석
장혁진 ( Jang Hyeok-jin ),심규영 ( Sim Kyu-young ),손동화 ( Shon Dong-hwa ) 충북대학교 건설기술연구소 2021 建設技術論文集 Vol.40 No.1
The outlook of east and west, influenced the mindset of the people of that era and various fields such as culture, philosophy, art, and architecture. These ideas were naturally expressed in life, and the West has changed its worldview many times, resulting in a variety of attitudes toward architecture. The West has changed its worldview with changes in science from ancient times, classical humanities, and modern humanities. On the other, the organic worldview that breathes east with nature for many years to build relationships has continued to this day. The organic worldview seeks harmony as an aim to breathe nature with humans, and this way of thinking is also naturally evident in architecture. However, in the 19th century, when rapid Westernization led to the embrace of the mechanical mindset of classical humanities in the West, traditional architecture began to be interpreted as Western ideas and mindsets. In the era of modern physiology, the Western worldview has changed to an organic worldview, but mechanical thinking and understanding methods still exist in interpreting traditional architecture and limiting the view of architecture and nature. Further, traditional architecture is a situation that confines the breadth of thinking in expressing the true value of traditional architecture because it is an architecture that reflects the organic worldview of the East in the selection of locations and arrangements in the Feng-shui system and values its relationship with nature. Therefore, the study looks at traditional architecture as a relationship between architecture and nature through various perspectives of organic relations, and this view is believed to be sufficiently valid to increase the true value of traditional architecture.
음향 공명 현상을 고려한 세라믹 메탈핼라이드의 특성 분석과 PSpice 시뮬레이션을 통한 인버터 설계
장혁진(Hyeok-Jin Jang),김남군(Nam-Goon Kim),양종경(Jong-Kyung Yang),이종찬(Jong-Chan Lee),박대희(Dae-Hee Park) 대한전기학회 2009 전기학회논문지 Vol.58 No.10
This study purposes are improvement of system (lamp & ballast) efficacy with and optical characteristics through the developed ceramic arc tube. The designed electronic ballast is substituted for conventional magnetic ballast. These electric signal and optical, thermal characteristics through the improving efficacy of lighting system compared with conventional magnetic ballast. properties of lamp by driving method is researching in ballast. Particularly, electronic ballasts, which improved against weakness of Magnetic Ballast, are researching and applying to control of ceramic metal-halide lamp. but One major limitation is the acoustic resonance problem in CMH lamps at high-frequency operation. In order to avoid acoustic resonance, driving frequency decided 21[kHz]. Before discharge in this paper. The PSpice simulation result obtained sufficient voltage gain and the ignition voltage obtained over 3[kV] at 75[kHz]. After discharge, driving voltage obtained approximately 90[Vrms] at 21[kHz].
아크튜브내의 구성물 손실이 세라믹 메탈 핼라이드 램프의 특성에 미치는 영향분석
장혁진(Hyeok-Jin Jang),양종경(Jong-Kyung Yang),박대희(Dae-Hee Park) 대한전기학회 2009 전기학회논문지 Vol.58 No.12
A Ceramic Metal-halide lamp is achieved by adding multiple metals to a basic mercury discharge. Because the vapor pressure of most metals is very much lower than mercury itself, metal-halide salts of the desired metals, having higher vapor pressures, are used to introduce the material into the basic discharge. The metal compounds are usually polyatomic iodides, which vaporize and subsequently dissociate as they diffuse into the bulk plasma. Metals with multiple visible transitions are necessary to achieve high photometric efficiency and good color. Compounds of Sc, Dy, Ho, Tm, Ce, Pr, Yb and Nd are commonly used. The maximum visible efficacy of a Ceramic Metal Halide lamp, under the constant of a white light source, is predicted to be about 450㏐/W. This is controlled principally by the chemical fill chosen for a particular lamp. Current these lamps achieve 130㏐/W and these life time are the maximum 16,000[hr]. So factors of performance lower are necessary to improve lamp performance. In this paper, we analyzed factors of performance lower by accelerated deterioration test. The lamp was operated with short duration turn-on/turn-off procedure to enhance the effect due to electrode sputtering during lamp ignition. The tested lamp that was operated with a longer turn-on/off(20/20 minutes) showed blackening, changed distance between electrodes and lowered color rendering & color temperature by losses of Dy at 421.18㎚, I at 511㎚, Tl at 535㎚ and Na at 588nm compared with the new lamp.