Circuit Simulator for Prediction of Electromagnetic Induction up to Data Transmission Frequency in Railway Environment

摘要

In the traction circuit, the feeding current causes inductive interference with metallic telecommunication lines. It is therefore necessary to reduce the influence of electromagnetic induction by the design using results of computer simulation. A circuit analysis program for the railway environment named ABTAC is available, although the calculation method is applicable only to low frequencies and conductors present in a structure are ignored. Nowadays, high speed data transmission systems by means of metallic telecommunication lines such as xDSL (Digital Subscriber Line) are being introduced and the frequencies used in these systems are higher than audio frequencies. Considering the electromagnetic screening effect of conductors in structures makes the prediction of electromagnetic induction more accurate. This study describes the development of a new circuit simulator. This tool will make it possible to take into account conductors in the structure and calculate voltage and current up to the data transmission frequency.