Converter filter for a frequency converter and method for filtering of a by means of at least one frequency converter is carried out by the surrounding the direction of and / or having a directional ends alternating current

摘要

A converter filter for a frequency converter to be connected between an electric network and a current consumer, in particular an electromotor, has a transformer with whose secondary side is associated a frequency-dependent circuit that at least approximately short-circuits the transformer at the secondary side in relation to the rated frequency of the electric network and that switches the transformer at least approximately as an open-circuit at the primary side in relation to the switching frequency of the frequency converter. A process for filtering an alternating current converted and/or to be converted by at least one frequency converter is characterised in that a transformer is used that is at least approximately short-circuited at the secondary side in relation to the rated frequency of the alternating current and that is operated at least approximately as an open-circuit at the primary side in relation to the switching frequency of the frequency converter.