Evaluation of a high efficiency boost stage to supply a permanent LED emergency lighting system

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting. Pub Date : 2004-11-01 DOI:10.1109/IAS.2004.1348594

A. Calleja, M. Rico-Secades, J. Cardesín, J. Ribas, E. Corominas, J. Alonso, J. Garcia

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引用次数: 31

Abstract

The first LED diode was made around 1962 (red LED by Holonyank & Bevacqua). These initial LEDs and posterior developments are widely used in very-low lighting level applications. Ternary and quaternary alloys are the bases of the present high-brightness LED's. Currently power LEDs are used in low-medium lighting applications: for instance, permanent emergency lighting systems (PELS), traffic lights, emergency exit indications, lighting in critical or strategic points, i.e. the limited lamp life in classical lamps 10.000-20.000 hours for fluorescent lamps implies short lamp-replacement times and, therefore, high maintenance costs. To overcome this situation a boost converter to supply a PELS system based in LED was developed. The topology and proposed control assure a constant current through LEDs for all the battery conditions. The long operation life (above 100.000 hours) of high efficiency LED's and a very simple electronics circuitry implies an interesting solution for this type of applications. Finally, a 30 lumens and 1 hour PELS has been built and tested.

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用于永久性LED应急照明系统的高效升压级的评估

第一个LED二极管是在1962年左右制造的(Holonyank & Bevacqua的红色LED)。这些最初的led和后来的发展被广泛用于非常低的照明水平的应用。三元和四元合金是目前高亮度LED的基础材料。目前，功率led用于中低照明应用:例如，永久性应急照明系统(PELS)，交通信号灯，紧急出口指示，关键或战略点照明，即传统灯具的有限灯寿命(荧光灯为10,000 - 20,000小时)意味着更换灯的时间短，因此维护成本高。为了克服这种情况，开发了一种升压变换器来提供基于LED的PELS系统。拓扑结构和提出的控制保证了在所有电池条件下通过led的恒定电流。高效率LED的长工作寿命(超过100,000小时)和非常简单的电子电路意味着这类应用的有趣解决方案。最后，一个30流明和1小时的PELS已经建成和测试。

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Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.

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