• Title/Summary/Keyword: Fluorescent Lamp

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Development of The LED FDL for Replacing Fluorescent Lamp (형광램프대체용 LED FDL 개발)

  • Yang, Byong-Moon;Jang, Woojin;Cha, Jae-Sang
    • 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.

2.5MHz Zero-Voltage-Switching Resonant Inverter for Electrodeless Fluorescent Lamp (무전극 램프 점등용 2.5MHz급 ZVS 인버터 개발에 관한 연구)

  • 박동현;김희준;조기연;계문호
    • Proceedings of the KIPE Conference
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    • 1997.07a
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    • pp.261-265
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    • 1997
  • Driving the electrodeless fluorescent lamp, the high ac voltage with high frequency is required. The linear power amplifier has been widely used as a driving circuit of electrodeless fluorescent lamp. However, the low efficiency of the power amplifier causes th driving circuit to be replaced by a PWM switching inverter. In order to use a PWM switching inverter as the driving circuit of an electrodeless fluorescent lamp, the high switching frequency is required. But due to the switching loss at switches of the inverter, the limitation of high switching frequency appears in the inverter. One solution to this limitation is to reduce the switching loss by using the zero voltage switching technique. In this paper, zero voltage switching resonant inverter for driving an electrodeless fluorescent lamp is discussed. The results of analysis about the inverter are presented and the equations for design are established. And the validity of the analyzed results are verified through the experiment.

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A Study of assessment criteria and reliability improvement for power supply of electrodeless fluorescent lamp (고효율 무전극형광등용 전원장치의 평가기준 및 신뢰성향상 연구)

  • 함중걸;신종욱
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2002.11a
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    • pp.181-185
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    • 2002
  • This paper gives an assessment criteria and reliability improvement for high frequency power supply of high efficacy electrodeless fluorescent lamp. The electrodeless fluorescent lamp system consist of electrodeless fluorescent lamp, high frequency power supply and lighting fixtures. The high frequency power supply has a shortest life at the system. Therefore It is need to assess the Failure Rate or Mean Time To Failure(MTTF) for the high frequency power supply of electrodeless fluorescent lamp system and improve the reliability at design. We suggest the assessment criteria and improve methods of the reliability on the design basis for the electodeless fluorescent system.

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Comparative Study of the Preheating Methods to Extend the Life of the Fluorescent Lamp (형광등의 수명 연장을 위한 예열 방식의 비교 연구)

  • Han, Jae-Hyun;Jo, Gye-Huyn;Park, Chong-Yeun
    • Journal of Industrial Technology
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    • v.23 no.A
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    • pp.29-33
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    • 2003
  • This paper proposed methods of filament preheating to extend a fluorescent lamp life. The ballast for the fluorescent lamp can be classified into two main groups magnetics and electronics. The electronic ballast is lighter and smaller than the magnetic ballast and it can dim up and down. There are two ways to start the fluorescent lamp in the electronic ballast: rapid start and instant start. Also there are two methods of the driving inverter self excited oscillation and force excited oscillation. The rapid starting is different from the instant starting in that the rapid start is preheating the filament before the steady state. If there is a preheating process before the lamp ignition, the life of the fluorescent lamp can be increased. This paper presented the preheating methods for self excited oscillating system and force excited oscillating system.

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Electrical characteristics of 28W fluorescent lamp ballast using piezoelectric transformer (압전트랜스포머를 이용한 28W 형광등 안정기의 전기적 특성)

  • 황상모;이정선;류주현;홍재일;정영호;손은영;박창엽
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.07a
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    • pp.198-202
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    • 2001
  • In this study, contour vibration mode piezoelectric transformer with size of 27.5${\times}$27.5${\times}$2.6mm$^3$ using PNW-PMN-PZT ceramic was fabricated. And the piezoelectric transformer was adopted to fluorescent lamp ballast circuit. Electrical characteristics of the piezoelectric transformer were investigated for fluorescent lamp ballast application. The electrical properties and characteristic temperature rise were measured using oscilloscope and infrared temperature sensor. A 28W fluorescent lamp was successfully driven by the fabricated ballast circuit. After driving the lamp using ballast circuit for 24 min, the output power, efficiency and characteristic temperature rise of piezoelectric transformer showed the appropriate values of 28.85[W], 86.3[%] and 15[$^{\circ}C$], respectively.

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Electrical and Optical Characteristics by Ferrite for Electrodeless Fluorescent Lamp (무전극 형광램프용 페라이트에 따른 전기적 및 광학적 특성)

  • Pack Kwang-Hyeon;Yang Jong-Kyung;Lee Jong-Chan;Park Dae-Hee
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.19 no.2
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    • pp.200-206
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    • 2006
  • An electric power efficiency of electrodeless fluorescent lamp depens on a big relative property of gas, gas pressure, lamp formation, ingredients of magnetic substance and shape and action frequency etc. in lamp. We used magnetic substance that opens self-examination material of electrodeless fluorescent lamp antenna. We used Mn-Zn type as the Ferrite. We have examined resistance, impedance and Q-factor's frequency characteristic by ferrite. Coil turns were changed from 13 to 15 turns to recognize brightness change of lamp by winding number. Optical equipment (LS-100) was used to measure brightness. We could know Q-factor's difference according to material is important part of antenna design. When an electrodeless fluorescent lamp was made using T company's PE22, it showed the highest brightness. As number of winding is increased the brightness increased, and starting characteristic became good.

A Study of assessment criteria and reliability improvement for power supply of electrodeless fluorescent lamp (고효율 무전극형광등용 전원장치의 평가기준 및 신뢰성향상 연구)

  • 함증걸;신종욱
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.17 no.2
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    • pp.34-40
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    • 2003
  • This paper gives an assessment criteria and reliability improvement for high frequency power supply of high efficacy electrodeless fluorescent lamp. The electrodeless fluorescent lamp system consist of electrodeless fluorescent lamp, high frequency power supply and lighting fixtures. The high frequency power supply has a shortest life at the system. Therefore It is need th assess the Failure Rate or mean Time To Failure(MTTF) for the high frequency power supply of electrodeless fluorescent lamp system and improve the reliability at design. We suggest the assessment criteria and improve methods of the reliability on the design basis for the electodeless fluorescent system.

A Study on LED Fluorescent Lamp applying Circuit Driven Method to Tubular LED Lamp Converter (직관형 LED램프 컨버터에 회로구동방식을 적용한 LED 형광등 연구)

  • Yang, Byongmoon;Cha, Jaesang
    • Journal of Satellite, Information and Communications
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    • v.10 no.1
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    • pp.77-82
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    • 2015
  • In this paper, we perform a study on LED Fluorescent Lamp applying Circuit Driven Method to Tubular LED Lamp Converter. The energy efficiency of LED fluorescent lamp converter requires exceptional protection circuit design, circuit design and structure, because it can not take advantage of Heat-sink structure of the heightened degree Reflector for Fluorescent Lamp. In this paper, we performed a study on LED fluorescent lamp applying circuit driven method to tubular LED lamp converter, Also, we designs LED lamp and converter which can supply DC power common commercial power source.

Effects of Artificial Light Sources and Light Intensities in Subway Stations on the Growth of Hedera rhombea and Saxifraga stolonifera (지하철 인공광원과 광도에 따른 자생 송악(Hedera rhombea)과 바위취(Saxifraga stolonifera)의 생육변화)

  • Ju, Jin Hee;Bang, Kwang Ja
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.11 no.6
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    • pp.73-80
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    • 2008
  • This research investigated appropriate indoor light sources and light intensities for Hedera rhombea and Saxifraga stolonifera, which are shade-tolerant and cold-resistant indoor plants. Plants were grown in wood flames of 1 m in width${\times}$1 m in length${\times}$1 m in height. Light sources were fluorescent lamp, three wave fluorescent lamp and halogen lamp that are being used in most of the subway stations in Korea, and light intensities were 200 Lux, 700 Lux and 1,000 Lux. Results are as following. 1. Hedera rhombea Hedera rhombea heights did not show differences statistically as responses to light sources and light intensities. It, however, tended to be greater with an order of 1,000 Lux, 700 Lux and 200 Lux and halogen lamp, fluorescent lamp, and three wave fluorescent lamp. Number of branch increased under fluorescent lamp than under halogen lamp or three wave fluorescent lamp, and increased under higher light intensities. Number of leaf was higher with an order of three wave fluorescent lamp 1,000 Lux, fluorescent lamp 1,000 Lux and halogen lamp 1,000 Lux. Leaf shape became wider under low light intensities regardless of light sources. Chlorophyl contents in leaf were not significantly different under three wave fluorescent lamp and halogen lamp. However, the contents increased with an order of 200 Lux, 700 Lux and 1,000 Lux under fluorescent lamp. 2. Saxifraga stolonifera The plants were dead or declined under fluorescent lamp regardless of light intensities. When light intensities went under 200 Lux, Saxifraga stolonifera showed poor growth for all the light sources. Plant height, number of shoot, number of leaf, leaf width and leaf length have increased with an order of halogen lamp 1,000 Lux, three wave fluorescent lamp 1,000 Lux and three wave fluorescent lamp 700 Lux. Chlorophyl content was greater with an order of three wave fluorescent lamp 700 Lux, three wave fluorescent lamp 1,000 Lux and halogen lamp 1,000 Lux.