• Proceedings of the Korean Society for Quality Management Conference
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• 2006.11a
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• pp.327-332
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• 2006

A study to build a reliability model of electronic ballasts for the fluorescent lamp has been performed in this paper. We selected the widely being used specification, MIL-HDBK-217 for the study. We briefly reviewed the basic concepts of the electronic ballast with the selected reliability specification. We then developed a reliability model for the ballast using MIL-HDBK-217 and predicted the reliability.

• Proceedings of the Korean Society for Quality Management Conference
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• 2006.11a
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• pp.333-338
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• 2006

A simple but practical approach to evaluate the reliability of electronic ballasts for the low wattage fluorescent lamp has been presented in this study. We briefly reviewed the basic concepts of the electronic ballast. We then proposed a simple model and evaluated the reliability of the ballast using computer simulation.

• Proceedings of the Korean Society for Quality Management Conference
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• 2006.04a
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• pp.69-75
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• 2006

As the level of technology and the standard of living improve, product reliability plays an Increasingly significant role. This study has been performed to build a reliability model of electronic ballasts for the low wattage fluorescent lamp. Telcordia SR-332, one of the most widely used reliability specifications, was selected for the model development. We briefly reviewed the basic concepts of the electronic ballast. We then developed a reliability model for the ballast using SR-332 concepts and the reliability has been examined.

• Journal of Power Electronics
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• v.12 no.5
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• pp.731-738
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• 2012

A new fluorescent dummy load to replace one of the fluorescent lamps in a dual lamp type rapid-start ballast for halving the lamp power is proposed. Using a circuit composed of a fundamental compensation circuit and a harmonic filter circuit, a new fluorescent dummy load having superior characteristics than a conventional dummy load is developed. The design principle and architecture of the proposed fluorescent dummy load is explained and verified by experiments.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.10 no.5
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• pp.52-56
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• 1996

Fluorescent lamps are widely accepted to energy efficient commercial lighting applications. In designing a fluorescent lamp system, a ballast design heavily relies on the characteristic of a fluorescent lamp under consideration. Especially, at startup time, the transient characteristic of a fluorescent lamp puts much tighter specification of a design. In this paper, based on the transient characteristic at the startup time, a transient behavioral model of a fluorescent lamp is presented with an equivalent circuit. The model is applicable to the wide range of fluorescent lamps provided by different manufacturers. The experimental results are compared with the results provided by PSPICE simulation. The result shows the model is effective In practice. As a result, we could identify more accurate startup constraints to decide the design of either an electro mechanical or an electronic ballast.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1031-1033
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• 2006

In this study, in order to solve these problems, a new type of electronic ballast, which is composed of rectifier, active power factor corrector, series resonant half bridge inverter and piezoelectric transformer, was proposed for driving T5 fluorescent lamp. Driving of piezoelectric transformer was carried out with input region for the ring electrode and output region for the dot electrode. A 35W (T5) fluorescent lamp was successfully driven by the fabricated ballast with piezoelectric transformer.

• Journal of the Korean Vacuum Society
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• v.14 no.1
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• pp.49-57
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• 2005

The characteristics of current and voltage in a basic discharge experiment are investigated for a cold cathode fluorescent lamp with ballast capacitors attached at both ends of lamp and for a capacitive coupled external electrode fluorescent lamp. In the current-voltage characteristics for a cold cathode fluorescent lamp except ballast capacitors, it is shown that the typical glow discharge with the cathode fall follows after the dark current and Townsend firing discharge. However, in the characteristics for a cold cathode fluorescent lamp including ballast capacitors, the current increases as the voltage increases in the glow discharge region without representing a cathode fall since the most voltage is loaded at two capacitors. The characteristics for the external electrode fluorescent lamp shows the same as that of the cold cathode fluorescent lamp in the respect of glow discharge characters, and the external electrode itself roles the ballast capacitor.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.1
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• pp.9-14
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• 2015

Due to the declining LED price and environment-friendly energy policies, CO2 emission reduction and energy-saving, the LED lighting industry is accelerating rapidly. In particular, the needs for LED lamp, replacing the existing fluorescent lamp without exchange luminaire or driver circuits, are also rapidly increasing. Therefore, replacement for T8 fluorescent lamp, LED T8 lamp was developed and standardized. However, except LED T8 lamps, other lamps' regulations or standards were not enacted. Also, the stability of fluorescent lamp substitutable LED lamp is low due to the difference in electrical characteristics and mismatch between the existing fluorescent lamp ballast and LED lamp. Therefore, many are struggling while developing fluorescent lamp substitutable LED lamp. In this paper describes the properties of existing fluorescent lamp ballasts and the considerations while developing fluorescent lamp substitutable LED lamp : demonstrating its validity by experiments the developed fluorescent lamp substitutable LED lamp prototype.

• The Transactions of the Korean Institute of Power Electronics
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• v.13 no.2
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• pp.103-109
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• 2008

This paper presents a new method for designing a ballast that can provide dimming control of an electrodeless fluorescent lamp. Frequency control of lamp power is inappropriate because the lamp coefficients such as equivalent impedance, coupling coefficient of the transformer, and plasma resistance are a function of lamp power. In this paper, the dimming is achieved by controlling the DC_Link voltage in relation to the lamp power. The DC_Link voltage is controlled by a buck converter. Simulation and experimental results of the proposed design method are presented in order to validate the proposed method.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.13 no.2
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• pp.17-23
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• 1999

This paper is to present a selected method of circuit parameters in the inverter part of the electronic dimming ballast fer fluorescent lamps, that is adffIuate to use with the prevailing dimming controller IC. Through the experirrent result using the prototype of the electronic dimming ballast rroduced by this rrethod, its validity is verified from the electrical and light outplt characteristics on fluorescent lamps. Also, it is feasible to rerrnte automatic and passive control for dimming electronic ballast as using a micrqrocessor, and we easily recognize the lamp condition owing to rmke a program indicate abnormal behavior for fluorescent lamp at PC screen.screen.