Device to suppress disturbing currents of given frequency in current supply for railed vehicles has feedback through an analog to digital converter and a digital filter

摘要

A device to suppress disturbance currents of given frequency in current supply devices comprises means to send a representative signal (y(t)) into a feedback branch though an A-to-D converter (4) and for each unwanted frequency through a digital filter (Cr) with a given transmission function (C) and a controller (Cs).