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A Study on the Method of preventing from Reduction of AF Track Circuit Signal Current on a Ferroconcrete Roadbed  

Hong, Hyo-Sik (한국철도대학 철도전기제어과)
Yoo, Kwang-Kiun (한국철도대학 철도전기제어과)
Rho, Sung-Chan (한국철도대학 철도전기제어과)
Publication Information
Journal of the Korean Society for Railway / v.13, no.5, 2010 , pp. 500-503 More about this Journal
Abstract
Until now, the track circuit with railroad which is a part of an electrical circuit wad used only for the detection of the train location, but as train speed is up to be higher, in order to overcome the limits of ground signal system the railway signal system has changed from the ground signal system to a cab signal system. The power source of the track circuit has also changed from a direct current or a high voltage impulse to an alternating current with high frequency which is a part of the audio frequency. To improve the maintenanability and according to the environment condition, the railway roadbed is rapidly changed to the ferroconcrete roadbed. In case of a track circuit to use an alternating current with high frequency as power source at a ferroconcrete roadbed, the characteristic of the track circuit is brought on a change from a loss of the magnetic combination instead of a leakage current from electric insulation which was caused by the reinforcing iron pod with lattice shape for durability. This paper is shown the influence and the loss of the signal current at AF track circuit on a ferroconcrete in the simulation sheets and presented a proposal for the preventive method from reduction of signal current.
Keywords
AF(Audio Frequency) track circuit; Ferroconcrete roadbed; Signal current;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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