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Thermal Characteristics Analysis of Upper Arm Hybrid Structure of Lightweight Pantograph Considering Heat Source by Collecting Current

집전전류에 의한 열원을 고려한 경량 판토그래프 상부암 혼성구조체의 열 특성 분석 연구

  • Park, Chan-Bae (Department of Railroad Operation System Engineering, Korea National University of Transportation) ;
  • Jeong, Geochul (Department of Electrical Engineering, Hanyang University)
  • Received : 2017.07.26
  • Accepted : 2017.08.16
  • Published : 2017.08.31

Abstract

Recently, domestic railway related institutes are developing pantographs for high speed trains; to lighten the upper arm, this device has a composite structure of CFRP (Carbon Fiber Reinforced Plastic) and aluminum instead of conventional steel. In the case of KTX-Sancheon, the pantograph must have a large current capacity because this system is of power-car type, supplying all necessary power for the train through a single pantograph. If the thickness of the pipe is arbitrarily increased in order to increase the current carrying capacity, without analyzing the thermal characteristics of the aluminum pipe, the increase in the weight of the upper arm may cause degradation of the current collecting performance. Therefore, in this paper, using the thermal analysis technique, we analyze the temperature change characteristics of the aluminum pipe of the upper arm over time, while receiving power at the stationary state of the KTX-Sancheon; we also examine the adequacy of the minimum thickness of the aluminum pipe in accordance with the proposed pantograph flow capacity.

Acknowledgement

Supported by : 한국연구재단

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