Investigation of Low Frequency EMI Produced by Inverter-Fed Linear Induction Motor Drives in Railway Systems

The goal of this paper is to perform a characterisation of electromagnetic emissions produced by power converters feeding a linear induction motor drive used in railway systems. The lack of a standard measurement site has been taken into account through a preliminary characterisation of the electromagnetic ambient noise. A lot of measurements have been carried out in order to investigate the electromagnetic behaviour of the whole system and a time and frequency domain analysis for conducted electromagnetic emissions has been performed.