AC impedance of r65 type rails on 1520 mm track in the audio frequency range

Abstract

Knowledge of the exact AC rail impedance in a wide frequency range is necessary for designing and modeling audiofrequency track circuits, determining of the return traction current distribution in rails of high-speed railways, etc. Results of the rail impedance investigations were published in papers of Carpenter and Hill, Mariscotti and Pozzobon [1] and others. A theoretical analysis of frequency dependence of rail impedance is based mainly on the so-called Carson/Pollaczek model or simply Carson’s method that was proposed almost simultaneously by Carson and Pollaczek. Based on Carson’s work.