• 전기학회논문지
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• 제59권5호
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• pp.904-911
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• 2010

This paper presents the design of acoustic resonance free and over current limit during transient state consideration electronic ballast for 1.5kW Metal-Halide Lamp(MHL) that employs frequency modulation (FM) technique. The proposed ballast consists of a Full-Bridge(FB) rectifier, a passive power factor correction (PFC) circuit, a full-bridge inverter, an ignitor using LC resonance and a control circuit for frequency modulation. The frequency modulation technique is the most effective solution to eliminate acoustic resonance among other technique. It spreads power spectrum of lamp to reduce the supplied power spectrum under the energy level of eigen-value frequency. Moreover, the proposed ballast is simple and cost effective above conventional ballast. A new PFC circuit is proposed which combines with LCD type and PCSR filter. A new PFC circuit has higher PF and lower THD than conventional LCD type and secure high reliability. Finally, to protected switching components in transient state, the surge current into ballast is limited by increase the switching frequency. Performance of the proposed ballast was validated through computer simulation using Pspice, experimentation and by applying it to an electronic ballast for a prototype 1.5kW MHL.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.936_937
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• 2009

본 논문은 시뮬레이션을 이용하여 1.5kW MHL(Metal Halide Lamp) 전자식 안정기 설계 및 해석하였다. 일반적으로 사용되고 있는 1.5kW MHL용 안정기는 여러 개의 자기식 안정기로 구동하여 국가적으로 많은 에너지 손실을 발생되고 있다. 따라서 본 논문에서는 1.5kW MHL용 전자식 안정기를 설계하였으며, 이론 및 시뮬레이션을 통하여 제안한 전자식 안정기의 성능을 검증하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.1493-1494
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• 2008

최근 메탈할라이드 램프에서 방전관 재료에 세라믹을 사용하는 세라믹 메탈할라이드 램프가 고연색성과 고효율, 장수명 등의 장점에 을 가지고 있다. 최근 이러한 세라믹 메탈할라이드 램프의 적용이 증가함에 따라 개선을 위하여 계속적으로 방전관 재료, 가스 및 메탈할라이드의 최적화, 구동방식에 따른 특성 등 다양한 요소에 대한 연구가 진행되고 있다. 본 논문은 이러한 세라믹 메탈할라이드의 구동방식에 따른 특성을 알아보기 위하여 자기식 안정기와 전자식 안정기의 구동 시 나타나는 전압, 전류 파형과 광학적 특성, 열적특성을 비교 분석하였다.

• 한국기계가공학회지
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• 제16권4호
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• pp.140-146
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• 2017

As energy conservation and environmental issues are emerging as a hot topic around the world, consumers are demanding high-efficiency, eco-friendly products. In this study, the author proposed 120W LED lighting system that replace metal halide lamp (MHL) which is currently used in the industry. Furthermore, it would be possible to provide a perfect opportunity for Korea to rise as a global leader in the LED lighting industry through soundness evaluation of the LED lighting system that is applied.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2010년도 하계학술대회 논문집
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• pp.544-545
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• 2010

전자식 안정기의 초기구동 시, 발생되는 입력단의 높은 돌입전류는 전자식 안정기 내의 전파정류다이오드 및 능동 역률보상회로의 파손원인이 되며, 제품의 신뢰성을 감소시키는 큰 요인으로 지목된다. 따라서 안정기의 입력에서 발생되는 돌입전류를 분석하고 제한하는 방법이 필요하다. 본 논문은 250W CDM(Ceramic Discharge Metal-halide) 램프용 DBI(Dual Buck Inverter) 구조의 전자식 안정기에서 초기 구동 시 높은 돌입전류가 발생되는 원인을 분석하고, 해결책을 제시하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 E
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• pp.2414-2416
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• 1999

기존 무전극 황전등의 방전광은 500 nm 보다 짧은 파장에서 최대 세기를 가지기 때문에 푸른색을 띤다. 본 연구에서는 각각 588 nm, 671 nm. 767 nm에서 방전광을 발생하는 Na, Li, K를 메탈할라이드의 형태로 황 방전구에 첨가하여 황과 같이 방전시킴으로써 전체 방전광의 분광분포를 장파장으로 이동시켜 방전광을 좀더 온화한 색으로 조절코자 한다. 첨가한 세가지 종류 모두 무전극 황전등의 방전광을 온화한 색으로 바꿀 수 있었다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2006년도 춘계학술대회 논문집
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• pp.228-229
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• 2006

본 논문에서는 250W 메탈핼라이드램프와 250W 고압나트륨램프에 대하여 전원전압 변동에 따른 수명측정시험을 수행하였다. 시험 전압은 220V와 220V의 80%인 176V 두 가지 전압을 사용하였다. 시험 방법은 100시간 에이징 후, 일주일마다 광속을 측정하였다. 전원전압을 변경하여 연속점등시 조도측정시험 결과는 메탈핼라이드램프의 경우 정격전압의 80%에서는 정격전압의 경우보다 초기광속의 70%에 도달하는 시간이 약 30% 단축되는 것으로 조사되었다. 그러나 고압나트륨램프의 경우는 전압변동과 수명과의 관계를 파악할 수 없었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1077-1078
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• 2007

본 논문은 고출력 MHL(Metal Halide Lamp) 전자식 안정기에 적합한 새로운 형태의 수동 PFC 회로를 제안하였다. 제안한 수동 PFC 회로는 저단가로 구현할 수 있으며 수동 소자의 사용으로 인해 신뢰성을 향상시켰다. 또한 기존의 수동 PFC 회로보다 입력 전류의 THD 및 역률을 개선하였다. 제안된 수동 PFC 회로에 사용된 소자값의 결정 방법을 수식적으로 제시하였으며 P-spice를 이용한 컴퓨터 시뮬레이션 및 1000W MHL 전자식 안정기에 실제 적용한 실험을 통하여 제안된 수동 PFC의 성능을 증명하였다.

• 수산해양기술연구
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• 제47권3호
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• pp.183-193
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• 2011

This study made a comparative analysis of behavioral reaction of squid to red (624nm), green (524nm), blue (460nm) & white LED light, its arrival time for the shadow section by making the shadow section in the central section of a water tank just like the bottom part of a squid jigging vessel, and on-site catching efficiency of LED fishing lamp with control fishing vessel. The color LED light showing the highest squidgathering rate as against the shadow section was found to be blue LED light with 39.3% rate under the dark (0.05lx) condition. Under the brighter condition than 0.05lx, white LED light was found to have the highest gathering rate of 41.5%. In addition, it was found that squid gathering rate was high at the shadow section which showed 6.3-fold brightness difference between the shadow section and bright section. As for the arrival time for the shadow section, blue LED light was found to be the fastest in attracting squids in 192.7 seconds under the dark condition while the red LED light was the fastest in luring squids in 164.6 seconds under the bright condition. The ratio of the squid-jigging operation and sailing in fuel consumption of the fishing vessel loaded with LED fishing lamp is about 7 to 1, showing most of the fuel is consumed more in sailing than in squid-jigging operation. As for a catch of squid, the control vessel loaded with MH (Metal Halide) fishing lamp had more catch of 600-7,080 squids than the vessel loaded with LED fishing lamp having a catch of 260-1,700 squids. In addition, even in the comparison of a catch per automatic jigging machine, the catch of the vessel loaded with MH fishing lamp excelled that of the vessel loaded with LED fishing lamp in 6 operations of squid jigging out of 9 operations. The ratio of hand-jigging and automatic jigging machine (one line) in the LED fishing lamp vessel was 1:1.1 excepting the case of having a catch only using an automatic jigging machine, showing almost the same with each other in catches, while in case of a MH fishing lamp vessel, its ratio against hand-jigging was 1 to 5.8, showing hand-jigging excelled in catches.

• 수산해양기술연구
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• 제48권3호
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• pp.187-194
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• 2012

This study surveyed the fishing efficiency for Japanese common squid based on improvements made to LED fishing lamps by utilizing the training ship of Gangwon Provincial College. The training ship, Haesong-ho (24 tons), was equipped with seventy-two 150W electric power LED fishing lamps (10.8kW), and their fishing efficiency and fuel consumption level were surveyed for a total of ten times during the period between June 15, 2009 and July 27, 2009. In addition, the training ship was equipped with seventy-one 300W electric power LED fishing lamps (21.3kW) and their fishing efficiency and fuel consumption level were surveyed for a total of five times during the period between January 17, 2010 and August 4, 2010. In order to compare the fishing efficiency of LED fishing lamps, the catch of another fishing vessel equipped with Metal Halide (MH) fishing lamps of 120kW for the same period and at the same fishing grounds. The fuel consumption levels during the fishing operation of Haesong-ho was about 1,047.7 liters which was approximately 19.9% of the total fuel consumption level of 5,262.6 liters, and the fuel consumption level per operation hour was on average 9.2 liters. The number of Japanese common squid caught by the LED fishing lamp-equipped fishing vessel ranged from 12 to 1,640 squid for each fishing trial and the average quantity was 652. The number of Japanese common squid caught by the MH fishing lamp-equipped 10 fishing vessels ranged from 40 to 4,800 squid and the average quantity was 2,055. The fishing of Japanese common squid was done by the use of hand lines and an automatic jigging machine. The number of Japanese common squid caught per hand line and a single roller of the automatic jigging machine was in the proportion of 50.8% to 49.2% with respect to the LED fishing lamp-equipped fishing vessel. However, the number of Japanese common squid caught per hand line and a single roller of the automatic jigging machine was in the proportion of 86.4% to 13.6% with respect to the MH fishing lamp-equipped fishing vessel where most of the catch was made by hand lines. On the other hand, in comparing the number of Japanese common squid caught per automatic jigging machine, the number of squid caught by the LED fishing lamp-equipped fishing vessel was about the same or greater than the number of squid caught by the MH fishing lamp-equipped fishing vessel.