• Proceedings of the IEEK Conference
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• 2002.06e
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• pp.319-322
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• 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.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2000.11a
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• pp.107-110
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• 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.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.05a
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• pp.133-135
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• 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.

• Proceedings of the KIEE Conference
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• 2000.11c
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• pp.568-569
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• 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.

• Journal of the Korea Safety Management & Science
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• v.9 no.6
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• pp.171-179
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• 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.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.47 no.2
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• pp.79-87
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• 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.

• Journal of Food Hygiene and Safety
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• v.34 no.2
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• pp.135-139
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• 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.

• Journal of the Korea Institute of Military Science and Technology
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• v.11 no.2
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• pp.136-143
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• 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.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.13 no.3
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• pp.7-13
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• 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.

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.5
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• pp.675-681
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• 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.