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AC/DC 12~254 V로 동작하는 방폭 LED Signal Lamp용 방폭 회로의 특성 분석
정민주,허인성,강인철,유영문,Jeong, Min-Joo,Her, In-Sung,Kang, In-Cheol,Yu, Young-Moon 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.11
In this paper, we develop a explosion-proof LED lighting (Ex circuit) circuit of Explosion-proof LED Signal Lamp (Ex LSL) to utilize the core module of the explosion-proof Local Control System (Ex LCS) for offshore plant applications. And then analyzed its electrical, optical and thermal characteristics. Ex circuit was applied input voltage from AC/DC(12~254) V. In this experiments, stable light-on characteristics were confirmed by eyes for the every input voltages with min. 78,462 and max. $517,975cd/m^2$ of luminance. also Output current and output luminance was made proportional. Because the measured maximum surface temperature of Ex circuit was $54.23^{\circ}C$ at AC 48 V, Ex circuit was rated with T6 of temperature class. Finally, Ex circuit was shown stable light on characteristics under the $-50^{\circ}C$ and $60^{\circ}C$ during 12 hours of test period.
CFD전산모사를 이용한 Al 6063 Heat Sink 최적화 설계와 열전도성 Polycarbonate와의 방열성능 비교 분석
허인성(In-Sung Her),이세일(Se-Il Lee),이아람(A-Ram Lee),유영문(Young Moon Yu) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.7
In the LED lighting applications, because LED packages are the origin of heat generation, there are thermal design problem on heat sinks. In the thermal design, it is important to consider the total volume and the total weight of heat sink simultaneously. In this study, an Al 6063 heat sink was optimized using Computational Fluid Dynamics(CFD) simulation tool for the cooling of 30W LED module, and then the cooling performance and the total weight of heat sinks with Al 6063 and Thermal Conductive Polycarbonate(TCP) were compared under the same conditions. As the result of simulation, an Al 6063 heat sink was optimized with 22 ea. of fins and 1.6 mm of fin thickness. LED Junction Temperature of the TCP Heat Sink was 5.6℃ higher, but total weight of it was 47 % less than the Al 6063.
Ne, Ar, Kr 혼합가스에서의 유도결합형 플라즈마 방전특성
허인성(In-Sung Her),최용성(Yong-Sung Choi),이종찬(Chong-Chan Lee),정영일(Young-Il Jeong),박대희(Dae-Hee Park) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
Recently, the environmental problem has received considerable attention. so, many lamps have been developing for environmental requirement and energy efficiency. also, at glow discharge lamp researchers try to reduce energy spending that is power saving lamp. this kind requirement agree with strong points of electrodeless fluorescent lamp has received to now lighting sauce. At low pressure as mTorr I.C.P make high density plasma easily, is good to maintain discharge, has high ionization and does not have failing lighting and losing ability of electron radiation by oxidation and volatilization of electrodes, because this tape does not have electrodes. This point of I.C.P can use at electrodeless fluorescent lamp in this study ICP display elements and Ar, Ne, Kr are researched for optical characteristic. each gas is looked into optical characteristic, also mixed gases is experiment for optical characteristic.
히트 스프레더를 적용한 150W급 고출력 투광등용 LED 광학엔진 연구
강민규(Min-Gyu Kang),허인성(In-Sung Her),유영문(Young Moon Yu),최희락(Hee-Lack Choi) 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.1
In this paper, design and heat dissipation of the LED lighting engine using the heat spreader were investigated to reduce weight and improve heat dissipation of 150W LED light. LED optical light engine A with heat spreader was lighter 3.8kg than LED optical light engine B with fin type heat sink. As a result of heat dissipation analysis, the maximum and average temperatures of the LED package using LED lighting engine A were lowered 2.16℃ and 3.45℃, than those using LED lighting engine B, respectively. The surface temperatures of the PCB in LED lighting engine A were lower than those of LED lighting engine B. The temperature difference between LED package and PCB of LED lighting engine A and B were 2.76℃ and 2.88℃, respectively. The thermal resistances of LED lighting engine A and B were measured 0.418K/W, 0.411K/W and junction temperatures were measured to be 80.47℃, 85.58℃, respectively. CFD analysis showed that thermal dissipation performance of LED lighting engine A were improved than LED lighting engine B in terms of thermal image surface temperature distribution and thermal resistance. The weight of LED lighting engine A was reduced by 45% compared to the LED lighting engine B.
LED터널등 모듈의 폐열활용을 위한 열전소자의 발전 성능 분석
정지영(Ji-Young Jeong),허인성(In-Sung Her),이세일(Se-Il Lee),김명호(Myeong-Ho Kim),유영문(Young Moon Yu) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.8
In this paper, we propose the LED(Light-Emitting-Diode) emergency lighting in a tunnel by using the thermoelectric devices. To achieve high generated power, thermoelectric device should be have high Seebeck coefficient and small contact area. Also, we reveal that a moderate heatsink required for high generated power. From the waste heat of LED tunnel lighting module (25W), the generated power was 0.062W by thermoelectric device, and it could illuminate for 1hour after charge the battery of emergency lighting during about 101hours.
히트 스프레더의 작동유체 충진율에 따른 열전달 성능에 관한 연구
강민규(Min-Gyu Kang),서우진(Woo-Jin Seo),허인성(In-Sung Her),유영문(Young Moon Yu),최희락(Hee-Lack Choi) 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.2
In this paper, the effect of thermal transfer depending on the filling ratio of working fluid in heat spreader was studied. The heat spreaders were filled with working fluid (acetone) rate of 0%, 5%, 15% and 40%, respectively. The temperature distribution according to the thermal transfer direction was measured. Finally the thermal transfer was analyzed for four different filling rates of working fluid and four different LED COB input powers of 5W, 10W, 15W, 20W. Then, the thermal resistivity and thermal transfer coefficients of heat spreaders were calculated. In result, it was found that heat spreader with 15% of filling rate was most effective in terms of the thermal transfer property, which are 0.49∼0.64K/W of thermal resistivity and 2071∼2719W/㎡K of thermal transfer coefficient.
아이스링크용 빙판 LED-디스플레이의 열특성 최적화 설계에 관한 연구
허인성(In-Sung Her),여정규(Jung-Kyu Yeo),유영문(Young-Moon Yu),이성재(Sung-Jae Lee) 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.3
Ice-rink in ice skating is increasingly demanding for a technology that can be used as a good display. When implementing an image by installing an LED-display below the Ice-rink, Various full color images and images can be displayed on Ice-rink with high visual immersion. Ice-rink users can be provided with various visual experiences. The purpose of this study is to prevent Ice-rink damage due to heat generation during operation of LED-Display. The temperature measurement of the ice link and the thermal characteristics of the SMPS were measured, Based on the measured data, thermal damage was predicted by ANSYS Icepak. At an ice temperature of -5℃, the temperature of the LED T<SUB>j</SUB> inside the LED-display is +5℃, However, the ice surface temperature is -2℃. ice is not damaged.