DOI QR코드

DOI QR Code

Performance Assessment of a Temperature Control Unit used in a Lifecycle Testing System for LED Headlamps on Locomotives

철도차량용 LED전조등의 수명시험용 온도제어부의 성능평가

  • Ohn, Jung-Ghun (Metropolitan Transit System Research Division, Korea Railroad Research Institute) ;
  • Jeong, Ki-Seok (Metropolitan Transit System Research Division, Korea Railroad Research Institute) ;
  • Chung, Jong-Duk (Metropolitan Transit System Research Division, Korea Railroad Research Institute)
  • Received : 2015.10.07
  • Accepted : 2016.01.14
  • Published : 2016.02.29

Abstract

LED light sources have been known to have a long life and good energy efficiency compared to traditional light sources. Recently, headlamps using LED light sources have ensured the forward visibility and safe operation of high-speed rolling stock. However, assessing the lifespan of LED headlamps based on real test data is not easy because it depends on the multiple stress factors such as a fixed driving current, junction temperature, vibration and so on. Generally, LED headlamps have failed before their advertised life span mainly due to temperature. Thus, the performance assessment of a temperature control unit should be done before a life cycle test of LED headlamps. This study attempted to develop a prototype temperature control module for a lifecycle test system using a commercial LED headlight and verified the system through experiments.

Acknowledgement

Grant : 3세부 고휘도(100만 칸델라급) LED전조등 개발

Supported by : 국토교통부

References

  1. J.N. Suh, I.S. Yeo (2008) Investigation on the Life Test of LED Lighting Module, Proceedings of the Korean Institute of Electrical Engineers Annual Summer Conference, Hoengseong, pp. 1491-1492.
  2. J.-G. Ohn, K.-S. Jeong, J.-D. Chung (2015) Conceptual design for lifetime test system for LED headlamp on a rolling stock, Journal of the Korean Society for Railway, 18(2), pp. 111-116. https://doi.org/10.7782/JKSR.2015.18.2.111
  3. M.S. Ko, J.H. Lee, S.J. Oh, et al. (2009) Cooling performance of LED head lamp with heat sink and cooling fan, Transactions of the Korean Society of Mechanical Engineers-B, 33(12), pp. 947-951. https://doi.org/10.3795/KSME-B.2009.33.12.947
  4. J.M. Lim, H.Y. Lee, K. Lee, D.H. Kim, et al. (2013) International standard trends of computing life assumption value of a light source through lumen maintenance, Proceedings of The Korean Institute of Illuminating and Electrical Installation Engineers Annual Spring Conference, Wonju, pp. 122-123.
  5. IES Testing Procedures Committee (2008) Approved method for measuring lumen maintenance or LED light sources, Illuminating Engineering Society of North America, IES LM-80-08.
  6. B.C. Ahn, J.Y. Song (2010) Control characteristics and heating performance analysis of automatic thermostatic valves for radiant slab heating system in residential apartments, Energy, 35(4), pp.1615-1624. https://doi.org/10.1016/j.energy.2009.11.007
  7. H.S. Choi, J.S. Yoon, T.W. Lim, et al. (2010) Temperature control for LED with fan circulated air-cooling system, Journal of the Korean Society of Marine Engineering, 34(8), pp. 1100-1106. https://doi.org/10.5916/jkosme.2010.34.8.1100
  8. J.G. Ohn, J.D. Chung, J.U. Kim, I.K. Kim (2013) An analysis of the heat-sink module for rail vehicle's LED headlamp, Proceedings of the Korean Society for Railway Annual Spring Conference, Pyeongchang, pp. 416-421.
  9. konics.co.kr/upload/data/KRN100_KO_KEP-K-0120D_20150326.pdf (Accessed 12 December 2015).
  10. konics.co.kr/upload/data/1363930074_1493_DATA.pdf (Accessed 12 December 2015).