• Proceedings of the KIEE Conference
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• 2007.11a
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• pp.246-247
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• 2007

In recent, there have been several developments in lamp technology that promise savings in electrical power consumption and improved quality of the lighting space. Above ail, the advantage of ring-shaped electrodeless fluorescent lamp is the removal of internal electrodes and heating filaments that are a light-limiting factor of conventional fluorescent lamps. Therefore, the life time of ring-shaped electrodeless fluorescent lamps is substantially higher than that of conventional fluorescent lamps and last up to 60,000 hours and is intended as a high efficacy replacement for the incandescent reflector lamp in many applications. In this paper, when appling the electrodeless lamp in luminaire, We analyzed change of optical and electrical characteristics.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2003.11a
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• pp.161-163
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• 2003

Ring-shaped electrodeless fluorescent lamp is removed the internal electrodes and heating filaments that are a light-limiting factor of conventional fluorescent lamps. The ring-shaped electrodeless lamp is intended as a high efficacy replacement for the incandescent reflector lamp in many applications. In this paper, maxwell 3D finite element analysis program (Ansoft) was used to obtain electromagnetic properties associated with the coil and nearby structures. The electromagnetic emitting properties were presented by 3D simulation software operated at 250[㎑]and some specific conditions. The optical measurement measured luminance and a temperature and an optical spectrum distribution for 10 minutes in a one minute interval at the same time.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.11a
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• pp.465-466
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• 2007

In electrode-less lamp, The key point in creating an efficient light source based on RF discharge is to minimize the RF power loss in the RF coupler which for Anderson's type of RF lamp is due to losses in the ferrite core. This loss depends on the particular ferrite material, its size, geometry, frequency in this kind of inductive lamp shows that the correct choice of discharge current has a crucial effect on the core loss. In this study, we measured Ferrite temperature in normal state, then analyzed electrical and optical characteristics according to ferrite shape. We were able to know that was ferrite of the antenna had relate closely with temperature and luminous of the lamp. Also we appraised temperature and electrical, optical properties during turn on the lamp.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.453-453
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• 2007

Electrodeless fluorescent lamp exhibit two modes of operation: a low density mode in which the power is capacitively coupled to the plasma and which is known as the E-mode, and a higher density mode which is an inductive discharge known as the H-mode. The transition between these two(E to H) mode exhibits hysteresis. It is observed that transition currents change at different frequencies and hysteresis exists not only between the starting and minimum maintaining currents of the electromagnetic mode (H mode) discharge but also between the starting and minimum maintaining currents of the electrostatic mode (E mode) discharge. Hysteresis effect can be important role in dimming system.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1410-1412
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• 2005

A novel dimming algorithm for the electronic ballast of the electrodeless lamp is proposed. The proposed algorithm is based on the burst dimming method and controls the duty ratio for the two switches of the electronic ballast by pulse width modulated signal. The preposed algorithm was implemented by a fully digital circuit using EPLD device. To verify the validity of the proposed algorithm, the implemented control circuit was applied to the electronic ballast for a 100W electrodeless fluorescent lamp. As a result, the wide illumination dimming range from 5% to 100% was obtained.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.04a
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• pp.65-69
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• 2009

Generally Lighting system consists of lamp and luminaire. When a fluorescent lamp is installed in luminaire, power and light output is changed by ambient temperature. Particularly electrodeless lamp depends on the changes that are mercury pressure with amalgam temperature and magnetic properties with ferrite temperature. It has finally influence on optical efficiency. In this study, the temperature change of ferrite and cold spot, vessel are measured at transitional state and then same characteristics are measured with increase of ambient temperature. At transitional state, luminous flux is related to temperature change of cold spot that compare with behavior of mercury pressure and light output. At increase of ambient temperature, we analyzed change that efficiency and electrical, optical characteristics of electrodeless lamp are related to ferrite core and cold spot temperature.

• Proceedings of the KIEE Conference
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• 2003.10a
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• pp.65-67
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• 2003

This paper describes a design of power supply for electrodeless lamp system to be easy to control electric power widely keeping the high power factor. Proposed system is composed of power factor correction(PFC) circuit, half bridge(HB) inverter, high voltage transformer, full wave rectifier to supply dc number kV's magnetron(MGT) anode voltage in the second of high voltage transformer and magnetron. It was confirmed that the proposed circuits can correct the 99.8[%] power factor and control input power of the magnetron up to 33.3[%] linearly by adjusting of pulse frequency of the inverter through the experiment.

• Proceedings of the KIEE Conference
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• 2003.10a
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• pp.312-315
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• 2003

In recent, there have been several developments in lamp technology that promise savings in electrical power consumption and improved quality of the lighting space. Above all, the advantage of ring-shaped electrodeless fluorescent lamp is the removal of internal electrodes and heating filaments that are a light-limiting factor of conventional fluorescent lamps. The ring-shaped electrodeless lamp is intended as a high efficacy replacement for the incandescent reflector lamp in many applications. Therefore, the life time of ring-shaped electrodeless fluorescent lamps is substantially higher than that of conventional fluorescent lamps and last up to 60,000 hours. In this paper, maxwell 3D finite element analysis program (Ansoft) was used to obtain electromagnetic properties associated with the coil and nearby structures. The electromagnetic emitting properties were presented by 3D simulation software operated at 250[kHz] and some specific conditions.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.05a
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• pp.145-147
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• 2007

Fluorescent induction lamps are assembly of a Low Pressure Mercury discharge vessel and an inductive power coupler. A vessel containing at least a Low Pressure Mercury vapor, which will be energized by means of the Inductive Coupler. The Ultra Violet radiation from the resulting discharge is converted by a layer of fluorescent material into visible light. The discharge vessel may have means of mechanical fixation to position it to the Inductive power coupler. The component to transform High Frequency electrical energy, by means of induction, in order to energize the Low Pressure Mercury in the discharge vessel. The component includes electrical connection. Fluorescent induction lamps don't have international standards yet. So we try to correspond Korea standards to international standards.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.607-608
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• 2006

In recent, it became necessary to develop the technology about electrodeless fluorescent lamp according to demand of the electrodeless fluorescent lamp system that used higher efficiency and advantage of long lifetime. Inductively coupled plasma is commonly used for electrodeless lamp due to its ease of plasma generation. An electric power efficiency of electrodeless fluorescent lamp has big relative property of gas in lamp, gas pressure, lamp formation, ingredients of magnetic substance and shape and action frequency etc. We used magnetic substance that open self-examination material of electrodeless fluorescent lamp antenna. Ferrite that is used in this experiment was Mn-Zn type. We have examined temperature and flux characteristic by frequency. Considering using frequency 2.65[MHz], Frequency was changed from 2.05(MHz) to 3.05[MHz] to recognize flux and temperature change of lamp. I used LMS(Lighting Measurement System) to measure flux and IR Camera to measure temperature of lamp.