고출력 LED 탐조등의 설계 및 제작
Design and fabrication of a high power LED searchlight
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초록
본 논문에서는 기존 1kW 할로겐 탐조등을 대체하기 위한 고출력 LED 탐조등에 관하여 기술하였다. 설계사양은 KDS 6230-1046-1과 KS V 8469를 기준으로 하였으며, 요구 광도 800,000cd를 만족시키기위하여 지향각 6°의 렌즈를 사용하였다. 시제작 LED 탐조등의 방열은 공랭식으로써 팬이나 히트파이프를 사용하지 않았다. 시험결과, 시제작 LED 탐조등의 소비전력은 148W로 1kW 할로겐 탐조등에 비해85% 절감되었으며, 중심광도는 945,000cd로써 KS V 8469를 만족하였다. 광효율은 기존 탐조등보다 4.7배 향상되었으며, 지향각, 색온도 및 연색성은 각각 5.4°, 5,500K, 70이었다. LED 탐조등의 외함 온도는60℃ 이하이고, SMPS 주변 온도는 50℃ 이하로 IEC 60092-306을 만족하였다.
Abstract
This paper dealt with a retrofit high power LED searchlight to replace conventional 1kW halogensearchlights. The design specification meets KDS 6230-1046-1 and KS V 8469. An optical lens with thebeam angle of 6° was used to meet the luminous intensity of 800,000cd at 0° in horizontal line. Heat dissipationof the LED searchlight adopted a free air cooling type which does not use a fan or a heat-pipe. From the test results, power consumption of the prototype LED searchlight was 148W which was saved by85% comparing a halogen searchlight of 1kW. Luminous intensity was 945,000cd at 0° in horizontal line, satisfyingKS V 8469. Luminous efficacy was improved by 4.7 times higher than that of the halogensearchlights. Beam angle, color temperature, and color rendering index(CRI) was 5.4°, 5,500K, and 70,respectively. Surface temperature of the LED searchlight was below 60℃ and surrounding temperature of theSMPS installed inside was below 50℃ which were satisfied with the IEC 60092-306.
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