Difficulties in Choosing Sine-Wave Filter Capacitances and Inductances

Relevance of the work reflects the increased use in practice of variable frequency electric drive additional options, which include sine-wave filter. It is shown that due to the presence of a gain band in the Bode magnitude diagram of a sine-wave filter, some undesirable voltage harmonics are amplified regardless of the choice of parameters. Designs of magnetic cores of inductors in the filter are recommended, which help suppress not only differential-mode, but common-mode components of voltage and current too.