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


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.


Grant : 3세부 고휘도(100만 칸델라급) LED전조등 개발

Supported by : 국토교통부


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