• Title/Summary/Keyword: Lamp

Search Result 2,703, Processing Time 0.035 seconds

Development of Electronic Ballast for Automotive High Intensity Discharge Lamp (자동차 헤드라이트용 전자식 안정기 개발)

  • 박종연;배수호;조계현
    • Proceedings of the IEEK Conference
    • /
    • 2002.06e
    • /
    • pp.319-322
    • /
    • 2002
  • In this Paper, we suggested the Half-Bridge inverter for the automotive HID electronic ballast. electronic ballast for automotive HID lamp should be supplied by low-frequency square wave avoiding the acoustic resonance(11kHz ∼ 825kHz). When the HID lamp is hot state, the electronic ballast should supply the sufficient current for a few milli-second to the lamp at the re-strike ignition state. that is called take-over current. We have introduced the new take-over current control method that could have reduced the peak current and supplied the sufficient take-over current.

  • PDF

Development of Electronic Ballast for 150W High Pressure Sodium Lamp (150W 고압나트륨램프용 전자식 안정기 개발)

  • 김순기;노재엽;이용후;최현배;이진우
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
    • /
    • 2000.11a
    • /
    • pp.107-110
    • /
    • 2000
  • This paper deals with the design of the electronic ballast for high pressure sodium lamp, which consists of the ignitor and the resonant converter for driving the lamp. Also it contains PFC(Power Factor Controller) to improve such as power factor, low distortion etc. In this paper, we design the electronic ballast for the 150 watt high pressure sodium lamp.

  • PDF

A Stuty of Protection Circuit for Discharge Lamp Ballast (방전등 안정기의 보호회로 기술 현황)

  • Han, Soo-Bin;Park, Suck-In;Song, Eu-Gine;Jeoung, Hak-Guen;Jung, Bong-Man
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
    • /
    • 2008.05a
    • /
    • pp.133-135
    • /
    • 2008
  • In a design of ballast for discharge lamp, various kind of protection circuit are essential for safe operation. In this paper, overvoltage and current detection, no-load detection, lamp-fault detection, end of lamp detection for protection are introduced. Individual circuit operation and their function are described with the base that all circuit form is similar with overvoltage protection circuit.

  • PDF

Xe-free 8" class flat fluorescent lamp with good uniformity (8"평판형광램프에 관한 연구)

  • Park, S.G.;Kim, S.Y.;Choi, J.Y.
    • Proceedings of the KIEE Conference
    • /
    • 2000.11c
    • /
    • pp.568-569
    • /
    • 2000
  • By manufacturing 8" class $146{\times}96mm$ "flat fluorescent lamp" of new form that uses xenon gas, an electric optical characteristic has been analyzed. Lamp shows that the lamp surface brightness is 4900 cd/m2 and the birghtness uniformity degree is 90% under sine wave of 15khz and applied voltage of 1,000 Vrms.

  • PDF

Seatbelt alarm lamp lam-function improvement: Red-X a case application (시트벨트 경고등 점등불량 개선: Red-X 적용사례)

  • Moon, Chan-Oh;Kim, Chang-Eun
    • Journal of the Korea Safety Management & Science
    • /
    • v.9 no.6
    • /
    • pp.171-179
    • /
    • 2007
  • The objective of this GM Red-X project was to reduce customer complaints on Kalos, Lacetti, Magnus as reported through 2004.1 - 2005.1 warranty performance. Seatbelt alarm lamp mal-function problem is connected with safety. So it is critical issue. Seatbelt alarm lamp mal-function which caused by buckle occurred 22 cases from 2004.1 to 2005.1.

Design and performance estimation of fish-luring system using the water cooling typed LED lamp (채낚기 어선용 수랭식 LED 집어시스템의 설계 및 성능평가)

  • Bae, Bong-Seong;An, Heui-Chun;Kwon, Ki-Jin;Park, Seong-Wook;Park, Chang-Doo;Lee, Kyoung-Hoon
    • Journal of the Korean Society of Fisheries and Ocean Technology
    • /
    • v.47 no.2
    • /
    • pp.79-87
    • /
    • 2011
  • A fishing lamp is fishing gear to gather fish in the night. But the cost of oil which is used to a light fishing lamp, goes significantly up to almost one hundred million won for 50 tonnage vessels and forty million won in case of vessels less than 10 tonnages. This cost has almost taken 30.40% of total fishing costs. As oil price increases, the business condition of the fishery gets worse and worse. Therefore, it is very urgent to develop an economical fishing lamp, to solve the problem of fishery's business difficulty. This research aims at developing a fishing lamp for squid jigging fishery and hairtail angling fishery using the LED, which has excellent efficiency and durability. One fishing lamp has about 160Watt capacity and five fishing lamps are installed one aluminium panel in which sea water flows to emit generated heat from LED to outside. Developed fishing lamp lights to an effective direction of jigging and angling operation. This fishing lamp can be controlled to light the direction of fish shoal because the aluminium panel can be controlled to up and down direction. The wave length of fishing lamp has white and blue color. White color light is to gather fish shoal of horizontal direction and blue color light is to gather fish shoal of vertical direction. After development of this fishing lamp, 60.110 units are established on the boat, and operated fishing. Consequently, in the case of squid jigging, spent energy was reduced to 39%, in the case of hairtail angling, 68% of spent energy was reduced. And the catch was more than another boat.

Comparison of Loop-Mediated Isothermal Amplification and Real-Time PCR for the Rapid Detection of Salmonella Typhimurium, Listeria monocytogenes and Cronobacter sakazakii Artificially Inoculated in Foods (식품에 인위접종된 Salmonella Typhimurium, Listeria monocytogenes, Cronobacter sakazakii의 신속검출을 위한 Real-time PCR과 Loop-mediated isothermal amplification 비교)

  • Kim, Jin-Hee;Oh, Se-Wook
    • Journal of Food Hygiene and Safety
    • /
    • v.34 no.2
    • /
    • pp.135-139
    • /
    • 2019
  • The objective of this research was to compare loop-mediated isothermal amplification (LAMP) with real-time polymerase chain reaction (PCR) for the rapid detection of pathogens in foods. In this study, the limits of detection (LODs) for Salmonella Typhimurium, Listeria monocytogenes, and Cronobacter sakazakii were evaluated in various foods. Among 11 samples tested for S. Typhimurium, LAMP and real-time PCR had the same LODs in beef and duck meat whereas real-time PCR was more sensitive than the LAMP in 8 samples. However, S. Typhimurium in chocolate samples was not detected by real-time PCR. The sensitivity of real-time PCR was high in all samples inoculated with L. monocytogenes and C. sakazakii whereas LAMP was more sensitive than real-time PCR in oil-rich foods. Therefore, LAMP can be shown as an easrer, more convenient method, as well as effective analytical method for testing difficult samples when employed in PCR.

A Study on Numerical Analysis of Thermal Flow in Solar Lamp Bank (솔라 램프뱅크 내의 열유동 수치해석에 관한 연구)

  • Kim, Sung-Dae;Ryoo, Seong-Ryoul;Baek, Sang-Hwa;Lee, Jeong-Yong;Park, So-Jin;Kim, Chul-Ju;Ko, Han-Seo
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.11 no.2
    • /
    • pp.136-143
    • /
    • 2008
  • A three-wavelength solar bank is a very important part for a solar simulator with commercial superlux lamps. It is projected metal halide lamps to satisfy following points simultaneously: $\pm$10% of uniformity for irradiance of target area and irradiance in each wave region, and $1,232W/m^2$ of maximum solar irradiance in summer. The developed solar lamp bank has been analyzed numerically by commercial programs in this study to carry out experiments. In conclusion, designed B-type heat lamp is not concentrated in one place than designed A-type heat lamp, it is spreaded widely, and it was proved numerical computation. We suggest that solar simulator is applied to actual experiment test through heat flow numerical analysis in solar lamp bank and the lamp is applied private industry or the military using complex environmental assessment test.

A Design of Electronic Ballast for 70W Metal Halide Lamps (70W 메탈핼라이드용 전자식 안정기의 설계)

  • 최명호;임성훈;한병성
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.13 no.3
    • /
    • pp.7-13
    • /
    • 1999
  • In this paper, a low wattage high frequency operation electronic ballast for double ended 70W metal halide lamp has been investigated As an input source of the proposed ballast, 220V, 60 Hz ac voltage is used and is converted high frequency ac voltage by power processing system. To prevent a physical destruction of the lamp from acoustic resonance phenorrenon, the proposed ballast sLWlies alternating voltage of 22kHz frequency to a metal halide lamp. It shows sorre efficacious result that reduce the start up tiIre of lamp and electric power consumption. By testing the proposed ballast, lamp voltage and lamp current are 155Vpeak, O.64A, respectively. Lamp luminous flux is 5300lm with 82W input power and ballast efficiency is 64.63 Im/w. The average starting tiIre and restriking tiIre of lamp are 3.9 and 4.5 minutes, respectively.tively.

  • PDF

Development of an Ultra-Violet Lamp and a Ballast for Ship's Ballast Water Treatment (선박평형수 처리용 자외선 램프 및 안정기 개발)

  • Cheon, Sang-Gyu;Park, Dae-Won;Kil, Gyung-Suk
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.35 no.5
    • /
    • pp.675-681
    • /
    • 2011
  • In this paper, we dealt with the design and fabrication of a medium pressure ultra-violet (UV) lamp and a magnetic ballast which are main components for ballast water treatment systems (BWTS). To acquire an optimal discharge condition of UV lamp, electrical and optical characteristics depending on the argon gas volume and the amount of mercury were experimentally analyzed. Rated voltage, current and power consumption of a prototype lamp were 490 [V], 8.6 [A] and 4.0 [kW], respectively. UV intensity of the lamp was 15 [%] higher than that of an equivalent lamp which is used in a BWTS. The magnetic ballast was designed in a UI core type through theoretical analysis and simulation. The open voltage and the rated power consumption of the ballast were 920 [V] and 8.5 [kVA] respectively. The disinfection efficacy which is carried out in a BWTS equipped with the UV lamp and magnetic ballast was over 99.99 [%], and this satisfy the IMO regulations.