A method for transferring electric power from a primary side (5) to a secondary side (6) of a converter (11) and/or vice versa, in particular for the purpose of delivering electric power to a high power application such as to a driving motor of a railroad vehicle, wherein the converter (11) comprises at least one electric or electronic valve for repeatedly interrupting and closing an electric connection thereby operating the converter (11) wherein a detection signal is filtered by performing a filtering process (unit 50), wherein the filtered detection signal is used to control (units 4, 21) the operation of the converter (11) and wherein the filtering process is at least partly performed by a comb filter (in unit 50).