• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2007년도 추계학술대회 논문집
• /
• pp.9-10
• /
• 2007

This paper presents that what's the right EOLL(End of Lamp Life) phenomenon on fluorescent lamp and how to detect it according to the lamp status. In normal end of life situation for fluorescent lamps is emitter depletion of the cathodes. So, in most cases, the discharge will extinguish and the lamp will not start. But if the ballast is capable of sustaining the discharge, a new condition arise. Especially, the T4 and T5 lamp which has a short distance from cathode to socket of lamp future must have the EOLL Protection function.

• 조명전기설비학회논문지
• /
• 제13권3호
• /
• pp.14-16
• /
• 1999

본 논문은 수전설비 용량을 계산하기 위한 형광등 기구의 기초 자료룰 제공하고 잇다. 형광등기구는 전원전압 변동에 유효전력 및 무효전력이 비선형적으로 변환한다. 따라서 이들 자료는 실측에 의하여만 제공된다. 본 논문에서는 40[W] 형광램프를 사용하는 등기구를 대상으로 여러 가지 안정기 교류에 대하여 전원전압 교류 200∼240[V] 변동 범위 내에서의 유효전력 및 무효 전력을 측정한 데이터를 제공하고 있다.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2002년도 하계종합학술대회 논문집(5)
• /
• pp.311-314
• /
• 2002

In recent years, various power factor correction(PFC) circuits for the electronic ballasts have been proposed. In this paper, we have studied several passive PFC and compared with their characteristics, used in the electronic ballast for fluorescent. Especially, Improved Valley Fill Circuit (IVF) and the circuit IVF PFC combined with Charge Pumping Capacitors(CPCs) have been reaserched for High Power Factor. In conclusion, we have researched characteristics of Passive PFC and proposed the most effective PFC method.

• 전력전자학회논문지
• /
• 제9권3호
• /
• pp.285-293
• /
• 2004

본 논문에서는 능동역률보상(PFC)의 구조를 가진 SEPIC 컨버터를 이용한 무전극 형광램프(electrodeless fluorescent lamps)용 전자식 안정기를 제안하였다. SEPIC 컨버터는 입력 전류의 낮은 고조파와 고역률의 특성을 가진다. 제안된 제어방법으로는 UC3854의 적분회로를 이용한 것으로 이 기술은 전류연속모드로 동작하는 역률보상 및 과전류보호를 제공하는 매우 간단한 제어 회로이다. 제안된 무전극 형광램프용 전자식 안정기는 3개의 무전극 형광램프용으로 설계되어 기존의 무전극 형광램프용 전자식 안정기보다 에너지 및 제작비 절약 효과가 크다. 제안된 안정기의 특성을 측정하기 위해 실험을 실시하였으며 이를 통해 고역률과 낮은 THD를 확인하였다.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2002년도 전력전자학술대회 논문집
• /
• pp.237-240
• /
• 2002

A CCFL model for high frequency dimming electronic ballast simulation is presented in this paper. The model can be utilized for an electronic ballast simulation with continuous dimming and transient mode simulation such as step dimming. The piezoelectric transformer Is evaluated using an AC analysis. The electronic ballast composed of piezoelectric transformers and ZVS inverter was implemented. It enables a fluorescent lamp to be fumed on stably. Simulation of a high frequency electronic ballast which operates a fluorescent Imp at high frequency is proposed. Simulation is carried out using PSPICE program to illustrate the performance of the circuit

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 1998년도 학술발표회논문집
• /
• pp.156-161
• /
• 1998

The purpose of this paper is to determine circuit parameters in the inverter part of the electronic dimming ballast for fluorescent lamps, that is adequate to use with the prevailing dimming controller IC. Firstly, the operating frequency characteristics are investigated by varying circuit parameters of electronic ballasts and are matched with the output characteristics of dimming ballast controller. Secondly, circuit parameter values are determined by using PSpice simulation and operating frequency characteristics. Finally its validity is verified from the electrical and light output characteristics on the prototype of the electronic dimming ballast.

• 전기학회논문지
• /
• 제56권9호
• /
• pp.1584-1588
• /
• 2007

This paper proposed the voltage compulsion method that used chopper for light dimming control of fluorescent lamp. During the dimming period, electronic ballasts have the bad characteristics such as low power factor, high THD(Total Harmonic Distortion) and etc. The proposed dimmer improves power factor, THD of electronic ballast and has benefit such as low cost, simple build up.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
• /
• pp.54-56
• /
• 2007

In recent, modeling methods for fluorescent lamp are developed well in both static and dynamic state. The models help reliable ballast to be developed in more fast time. This paper reviews the concept and method for well developed models, especially, circuit oriented models using PSpice.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 2004년도 전력전자학술대회 논문집(2)
• /
• pp.902-905
• /
• 2004

Characteristics of electrodelss lamp as a load of the ballast is different compared to normal fluorescent lamp because the lamp includes the magnetics for inductive discharging process. So somewhat different modeling is necessary to make a proper power match between the lamp and ballast. Modeling of an electrodeless lamps, Endura of Osram, is presented in this paper. Simulation with a result of experiment is given for a verification of proposed model.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2004년도 춘계학술대회 논문집
• /
• pp.131-134
• /
• 2004

Characteristics of electrodelss lamp as a load of the ballast is different compared to normal fluorescent lamp because the lamp includes the magnetics for inductive discharging process. So somewhat different modeling is necessary to make a proper power match between the lamp and ballast. Modeling of an electrodeless lamps, Endura of Osram, is presented in this paper. Simulation with a result of experiment is given for a verification of proposed model.