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林秉魯(Byoung-Noh Lim),張牧淳(Mog-Soon Jang),申東碩(Dong Seok Sin),朴鐘演(Chong-Yeun Park) 대한전기학회 2007 전기학회논문지 Vol.56 No.9
This paper presents a new modeling method using lamp output power and the modeling coefficients of the lamp. The proposed method utilizes the lamp modeling coefficients such as equivalent impedance Z(p), coupling coefficient of the transformer k(p), turns ratio of the transformer n(p), and plasma resistance Rp(p) as a function of lamp output power. The equivalent impedance Z(p) was developed from the equivalent resistance Req(p) and equivalent inductance Leq(p) of the lamp. Simulation and experimental results of the proposed model are presented in order to validate the proposed method. The modeling method can use to design an impedance matching circuit for a Class-D inverter.
HID 램프를 위한 전자식 안정기의 LCC 공진 인버터의 최적 설계
朴鍾演(Chong-Yeun Park),張牧淳(Mog-Soon Jang),林秉魯(Byoung-Noh Lim) 대한전기학회 2007 전기학회논문지 Vol.56 No.3
This paper presents a new method for determining L, Cs, and Cp in a series parallel resonant inverter. This inverter is suitable for driving high-intensity discharge (HID) lamps. The operating frequency is selected to avoid acoustic resonances which are governed by the size and shape of the arc tube. L, Cs and Cp, are chosen to satisfy the ignition and steady state requirements of the lamp. Equations are developed to analyze the starting condition and steady state operating condition of the lamp. For the prototype ballast for a 250W Metal Halide Lamp, experimental results are presented in order to validate the proposed method.
시동전류 제한을 통한 메탈헬라이드 램프용 안정기의 최적 설계
林秉魯(Byoung-Loh Lim),張牧淳(Mog-Soon Jang),林起勝(Ki-Seung Lim),朴鍾演(Chong-Yeun Park) 대한전기학회 2008 전기학회논문지 Vol.57 No.3
This paper proposed a new optimal design method of the electronic ballast with stable run-up current for Metal Halide lamp during the ignition condition. In order to avoid operation in the acoustic resonance frequency band and to supply the optimal ignition current without demage of inverter switching components during the ignition period, the values of the series inductor Ls, the series capacitor Cs, and the parallel capacitor Cp were determined by analysis of characteristics of inverter transfer function depend on Lamp operating power and resistance of ignition condition and steady state operating condition. For the prototype ballast for a 400W Metal Halide Lamp, experimental results are presented in order to validate the proposed method.
웨이블렛 변환을 이용한 비선형 부하 전원선에서의 직렬 아크고장 신호 분석
方善培(Sun-Bae Bang),朴鍾演(Chong-Yeun Park),張牧淳(Mog-Soon Jang),崔原豪(Won-Ho Choi) 대한전기학회 2008 전기학회논문지 Vol.57 No.8
In this paper, a new detection method of series arc-fault signals occurring at the wiring of home appliances is proposed. The discrete wavelet transform was used for the numerical analysis of the variation rate in peak, RMS, noise energy, shoulder of the arc-fault current wave. As a results, the arc distinction threshold value of these variation rates was about 0.1 in most cases. The arc-fault current of the loads with the active PFC circuit showed a high rate of variation in noise energy and shoulder, but arc-fault current of the loads without the active PFC circuit showed a high rate of variation in peak and RMS. The arc fault current in resistive loads showed a high rate of variation in shoulder.
Chan Won Park(朴贊元),Dae Weon Yoon(尹大遠),Chong Yeun Park(朴鍾演),Mog Soon Jang(張牧淳) 강원대학교 산업기술연구소 1993 産業技術硏究 Vol.13 No.-
To analyze dynamic characterics for a motorcar, the creating and the hammering test methods are introduced. This paper has studied the method of computing the natural frequency of the impulse wave on a tire, the decay constant which determines the absorption capability for the impulsive force. Moreover we have examined the reliability for the decay constant calculated, in this paper theoritical results are agreed with the simulated ones.
HID램프와 안정기 사이의 전선 길이에 따른 이그니션 전압 전달특성 분석
方善培(Sun-Bae Bang),金鍾旻(Chong-Min Kim),韓雲基(Woon-Ki Han),林秉魯(임병노),張牧淳(Mog-Soon Jang) 대한전기학회 2007 전기학회논문지 P Vol.56 No.3
In this paper, characteristics of ignition voltage and current by wire length of HID(High Intensity Discharge) lamp circuit are analyzed. In the construction field, decision of the wire thickness for HID lamp circuit has the problems, and these are presented. Through transmit parameters, equivalent model of the ballast and HID lamp circuit was derived. The graph of voltage reduction about length between the ballast and the lamp is shown. The simulation of proposed model and experimental results are presented in order to validate the proposed method. The proposed model and graph can use to choose the proper length of wire between the ballast and the lamp in the field.
尹大遠,朴鍾演,張牧淳,朴贊元 江原大學校 産業技術硏究所 1993 産業技術硏究 Vol.13 No.-
To analyze dynamic characterics for a motorcar, the creating and the hammering test methods are introduced. This paper has studied the method of computing the natural frequency of the impulse wave on a tire, the decay constant which determines the absorption capability for the impulsive force. Moreover we have examined the reliability for the decay constant calculated, in this paper theoritical results are agreed with the simulated ones.