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Thermal Analysis and Test of Eddy-Current Braker for High-Speed Train  

정수진 (영남대 공대 전기공학과)
강도현 (한국전기연구원 Mechatroncis 그룹)
구대현 (한국전기연구원 Mechatroncis 그룹)
김동희 (영남대 공대 전기공학과)
방덕제 ((주) 신성이엔지 FAS 사업부 개발팀)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.52, no.5, 2003 , pp. 197-202 More about this Journal
Abstract
When a high-speed train reduces its operating velocity while decelerating from a maximum of 350 to 50 [km/h], the train applies eddy-current brakes, which results in a deceleration time of approximately 3minutes. Therefore, a high current is utilized in order to obtain a large braking force. Consequently, the temperature of the electromagnet and rail increases significantly. In this paper, The thermal characteristics on a single magnet pole with convection heat transfer coefficient are simulated by using 2D-FEM. To verify the analysis results, the computed temperatures are compared with the experimentally measured temperature at stationary state. Furthermore, transient-state thermal analysis is performed to predict the magnet temperatures as the train is decelerating.
Keywords
High-speed train; Eddy-current braker; Convection heat transfer coefficient; 2D-FEM;
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