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A Study on the High-frequency Operation Characteristics of the High-pressure Sodium Lamps
지철근,김훈,Chee, Chol-Kon,Kim, Hoon 대한전기학회 1986 전기학회논문지 Vol.35 No.11
The change of the discharge characteristics of the high-pressure sodium (HPS) lamps is investigated over a power source frequency range of 60 Hz to 30, 000 Hz. As the frequency increases, the light and electrical characteristics of the HPS lamps are improved since the re-ignition is not needed due to the constant electron density, and the cathode fall is reduced. But at the certain frequency range, the arc instability called acoustic resonance occurs, and the arc tube is damaged. Regarding these characteristics and the kind of the illuminating system, a proper frequency is selected to operate the HPS lamps. And a new measuring system using a computer and the storage-scope is developed to avoid the error of the ordinary gauges at high frequency power.
지철근,서국철,송언빈,김세동,최도혁 한국조명전기설비학회 1995 조명.전기설비 Vol.9 No.1
한국건설기술연구원(원장 이재명)과 한국조명.전기설비학회(회장 지철근)는 공동으로 종래 사용하여 오던 '건축전기설비공사 표준시방서'를 건설교통부의 지원으로 개정하였습니다. 앞으로 건설시장개방에 대응하기 위하여 건축전기설비공사 부문의 본 시방서가 계속 보완발전되도록 건축전기설비 기술자 제현의 많은 조건이 있으시기 바라오며, 표준시방서의 역할과 구성체계및 개정 내용에 대해서 간단히 소개하고자 합니다.
A Study on the AC Arc Model of High Pressure Mercury Discharge
지철근,김훈,이상우,Chee, Chol-Kon,Kim, Hoon,Lee, Sang-Woo 대한전기학회 1987 전기학회논문지 Vol.36 No.9
This study presents a model of the electrical characteristics of the high-pressure mercury vapour arc discharge. Energy balance equation per unit volume of the arc tube is converted into the one per unit length by assuming the parabolic radial temperature distribution and integrating over the cross-section of the tube. Using this energy balance equation, together with the circuit equation and Ohm's law, the arc voltage and current variation for 1 cycle is numerically calculated and a good result is obtained. A simple method to calculate the axis temperature of the arc tube and the radiation output is also presented.