• Title/Summary/Keyword: Modeling Fluorescent Lamps

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A SPICE Modeling and Simulation of Electrodeless fluorescent lamp Endura (SPICE를 이용한 무전극 램프의 모델링 및 시뮬레이션)

  • 박석인;한수빈;정봉만;유승원;장우진
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2002.11a
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    • pp.19-21
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    • 2002
  • Electroded lamps operated at a high enough frequency can usually be modeled for the purpose of ballast design, as a resistor. Electrodeless fluorescent lamps include other components such as the arc tube's inductance. But that's impedance is small and so will be neglected in this paper. So, electrodeless fluorescent lamps is modeled as a resistor. A SPICE compatible model was developed for an electrodeless fluorescent lamp(OSRAM SYLVANIA ICETRON/ENDURA 150W).

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A Study on the Modeling on the Dimming Control of Electrodeless Fluorescent Lamps (무전극 램프 조광제어를 위한 모델링 연구)

  • Jang, Tae-Eun;Kim, Hee-Jun
    • Proceedings of the KIEE Conference
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    • 2005.07b
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    • pp.1492-1495
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    • 2005
  • This paper presents a study on the modeling on the dimming control of electronic fluorescent lamp. The resulted models of the lamps were applied the two dimming control methods, one is the variable switching frequence and the other is the variable dc link voltage method. And the comparison of the dimming characteristics between the two methods was presented. Theoretical predictions were verified the experimental results on a 100w electrodeless fluorescent lamp.

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A Study on the Dimming Control of Electrodeless Fluorescent Lamps (무전극 형광램프의 조광제어에 관한 연구)

  • Jang, Tae-Eun;Kim, Hee-Jun
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.11
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    • pp.553-560
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    • 2005
  • This paper presents a study on the dimming control of electrodeless fluorescent lamp. To do this the equivalent model of electrodeless fluorescent lamp (ENDURA 100w Type) was first established. The resulted model of the lamp was applied to the two kinds of dimming control method, one is the variable switching frequency method and the other is the variable dc link voltage method. And the comparison results of the dimming characteristics between the two methods was presented. Theoretical predictions were verified by the experimental results on the ENDURA 100W type electrodeless fluorescent lame.

Analysis of characteristic through BLU modeling (BLU의 모델링을 통한 특성 해석)

  • Kim, Hyun-Sik;Song, Gee-Seok;Song, Sung-Geun;Park, Sung-Jun;Lim, Young-Cheol
    • Proceedings of the KIEE Conference
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    • 2008.07a
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    • pp.908-909
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    • 2008
  • A kind of fluorescent lamps CCFL(Cold Cathod Fluorescent Lamp) is used for backlight of LCD and the demand of backlight for TV is getting more. CCFL is also used in a backlight for TFT-LCD panel. BLU(Backlight Unit) has lots of components so it looks a electrical product. As the size of LCD display is larger with increasing of the demand, to drive CCFL inverter is more important. Therefore, a sort of modeling to drive 4 lamps with a transformer is used and we have a simulation test with proposed modeling so we can take some data from the test. The utility of the proposed modeling is verified through using for 30-inch LCD backlight with the data.

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Modeling and Simulation of an Electrodeless lamp system (무전극등 시스템의 모델 및 시뮬레이션 연구)

  • 한수빈;박석인;정봉만;정학근;김규덕;유승원
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2003.11a
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    • pp.237-239
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    • 2003
  • Characteristics of electrodeless 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.

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Modeling and Simulation of Endura Electrodeless lamp system (엔두라 무전극 램프용 안정기 개발을 위한 모델 및 시뮬레이션 연구)

  • Han Soo-Bin;Park Suck-In;Jung Hak-Kun;Kim Gue-Duck;Jung Bong-Man
    • Proceedings of the KIPE Conference
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    • 2004.07b
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    • pp.902-905
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    • 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.

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Modeling and Simulation of an Electrodeless lamp system (무전극등 안정기 시뮬레이션 연구)

  • Han, Soo-Bin;Park, Suck-In;Jung, Bong-Man;Jeoung, Hak-Guen;Kim, Kue-Duck
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.05a
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    • pp.131-134
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    • 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.

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A Study on Pspice Modeling with CCFL using Piezoelectric Transformer (압전변압기를 이용한 CCFL의 PSPICE 모델링에 관한 연구)

  • Hwang Lak-Hoon;Kim Ju-Rae;Lee Sang-Yong;shin yang-ho;Cho Moon-Taek
    • Proceedings of the KIPE Conference
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    • 2001.07a
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    • pp.630-633
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    • 2001
  • This paper presents a PSPICE circuit model for the simulation of both static and dynamic characteristics of fluorescent lamps. The model can by utilized for an electric ballast simulation with continuous dimming and transient mode simulation such as step dimming Characteristics of a Rosen-type piezoelectric transformer were analyzed by combining an equivalent circuit with piezoelectric equations and the relation between the characteristics and the dimension of the PT was studied.

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Growth Model of Common Ice Plant (Mesembryanthemum crystallinum L.) Using Expolinear Functions in a Closed-type Plant Production System (완전제어형 식물 생산 시스템에서 선형 지수 함수를 이용한 Common Ice Plant의 생육 모델)

  • Cha, Mi-Kyung;Kim, Ju-Sung;Cho, Young-Yeol
    • Horticultural Science & Technology
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    • v.32 no.4
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    • pp.493-498
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    • 2014
  • The objective of this study was to make growth and yield models for common ice plant (Mesembryanthemum crystallinum L.) using expolinear functional equations in a closed-type plant production system. Three-band radiation type fluorescent lamps with a 12-hours photoperiod were used, and the light intensity was $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$. Nutrient film systems with three layers were used for plant growth. Environmental conditions, such as air temperature, relative humidity and $CO_2$ concentration were controlled by an ON/OFF operation. Leaf area, shoot fresh and dry weights, light use efficiency of common ice plant as function of days after transplanting, accumulative temperature and accumulative radiation were analyzed. Leaf area, shoot fresh and dry weights per area were described using an expolinear equation. A linear relationship between shoot dry and fresh weights was observed. Light use efficiency of common ice plant was $3.3g{\cdot}MJ^{-1}$ at 30 days after transplanting. It is concluded that the expolinear growth model can be a useful tool for quantifying the growth and yield of common ice plant in a closed plant production system.

Development of a Planting Density-Growth-Harvest Chart for Common Ice Plant Hydroponically Grown in Closed-type Plant Production System (식물 생산 시스템에서 수경재배한 Common Ice Plant의 재식밀도-생육-수확 도표 개발)

  • Cha, Mi-Kyung;Park, Kyoung Sub;Cho, Young-Yeol
    • Journal of Bio-Environment Control
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    • v.25 no.2
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    • pp.106-110
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    • 2016
  • In this study, a planting density-growth-harvest (PGH) chart was developed to easily read the growth and harvest factors such as crop growth rate, relative growth rate, shoot fresh weight, shoot dry weight, harvesting time, marketable rate, and marketable yield of common ice plant (Mesembryanthemum crystallinum L.). The plants were grown in a nutrient film technique (NFT) system in a closed-type plant factory using fluorescent lamps with three-band radiation under a light intensity of $140{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ and a photoperiod of 12 h. Growth and yield were analyzed under four planting densities ($15{\times}10cm$, $15{\times}15cm$, $15{\times}20cm$, and $15{\times}25cm$). Shoot fresh and dry weights per plant increased at a higher planting density until reached an upper limit and yield per area was also same tendency. Crop growth rate, relative growth rate and lost time were described using quadratic equation. A linear relationship between shoot dry weight and fresh weights was observed. PGH chart was constructed based on the growth data and making equations. For instance, with within row spacing (= 20 cm) and fresh weight per plant at harvest (= 100 g), we can estimate all the growth and harvest factors of common ice plant. The planting density, crop growth rate, relative growth rate, lost time, shoot dry weight per plant, harvesting time, and yield were $33plants/m^2$, $20g{\cdot}m^{-2}{\cdot}d^{-1}$, $0.27g{\cdot}g^{-1}{\cdot}d^{-1}$, 22 days, 2.5 g/plant, 26 days after transplanting, and $3.2kg{\cdot}m^{-2}$, respectively. With this chart, we could easily obtain the growth factors such as planting density, crop growth rate, relative growth rate, lost time and the harvest factors such as shoot fresh and dry weights, harvesting time, marketable rate, and marketable yield with at least two parameters, for instance, planting distance and one of harvest factors of plant. PGH charts will be useful tools to estimate the growth and yield of crops and to practical design of a closed-type plant production system.