The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Variation of Magnetic Field Intensity and Short Current by Coating Material of Spray in AF Track Circuits

AF궤도회로에서 코팅재에 의한 자계의 세기 및 단락전류 변화에 대한 연구

  • 김민석 (서울과학기술대학교 철도전문대학원 철도전기신호공학과) ;
  • 오세화 (서울도시철도공사) ;
  • 박용걸 (서울과학기술대학교 철도전문대학원 철도건설공학과) ;
  • 이종우 (서울과학기술대학교 철도전문대학원 철도전기신호공학과)
  • Received : 2010.08.27
  • Accepted : 2011.02.11
  • Published : 2011.03.01
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Abstract

There is a method for offering continuous information by AF track circuits. Magnetic fields are formed by current through rails in the AF track circuit systems. So, the continuous information is received by the magnetic fields on a on-board antenna. Coating materials of spray on rails are researched to decrease defects such as head check, shelling, corrugation, squats and so on in Germany. Currently, a coating method of rail construction is proposed by using the ceramics in Korea. When deciding physical characteristic of the coating material of spray, researches are required about variation of flux density and resistivity by using the coating material of spray. In case that the flux density is much lower than existing value, the information for train control is not transmitted to the on-board antenna. In this paper, inductance on rails is calculated and a model is presented about variation of the magnetic field intensity and resistivity in the AF track circuit. Standard permeability of the coating material of spray is proposed. Also, standard resistivity of the coating material of spray is presented by analyzing short current.

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References

  1. Jae-Young, Park, "Railway Signalling Engineering", Dong-il Publisher, pp.53-60, 2006.
  2. In-Kwon, Kang, "Electric Railway System Engineering", Sung-An-Dang, pp.105-110, 2007.
  3. Minseok Kim, "A Study on Coupling Coefficient between Rail and Reinforcing Bars in Concrete Slab Track," Journal of The Korean Society for Railway, Vol.12, No.3, pp.405-411, 2009.
  4. D.K. Cheng, "Fundamentals of Engineering Electromagnetics", Pearson Education, pp. 177, pp. 292-293, 2002.
  5. A.G. Olabi, A. Grunwald, "Computation of Magnetic Field in an Actuator", Simulation Modelling Practice and Theory, Vol. 16, Issue 10, pp.1728-1736, 2008. https://doi.org/10.1016/j.simpat.2008.08.014
  6. Min-Seok Kim, Jong-Woo Lee, "The Influence of Frequency on Wayside Transmitter of ATP System upon Reinforcing Bars in Concrete Slab Track", Journal of the Korean Society for Railway, Vol.11, No.6, pp.536-542, 2008.
  7. Mathew N. O. Sadiku, "Elements of Electromagnetics", Oxford University Press, Second Edition, pp.278-281, 1998.
  8. R. Feymman, "Lecture on Physics", Seung-San, Vol.2, pp.17:12-17:14, 2004.
  9. Paul G.Slade, "Electrical Contacts : principles and Applications", Marcel Deker, pp.3-10, 1999.
  10. Milenko Braunovic, "Electrical Contacts : Fundamentals, Applications and Technology", CRC Press, pp.7-8, 2006.
  11. R. Johm Hill, "Rail Track Distributed Transmission Line Impedance and Admittance: Theoretical Modeling and Experimental Results", IEEE Trans, vol.42, no.2, pp.225-241, 1993.
  12. Schelkunoff, S. A, "Transmission Theory of Plane Electromagnetic Waves", IRE. vol.25, pp.1457-1492, November, 1937. https://doi.org/10.1109/JRPROC.1937.228764
  13. Siemens, "Assembly for Track Circuit Measurement Test Track", pp.63-70, 2005.
  14. Eun-Sil, Han, "Maxwell 3D", Ansoft-Korea, Inc, pp.102-110, 2006.