Aliasing effect in power electronics

After measuring digital signal it is necessary to deal with the aliasing effect (it´s a problem of overlapping side bands) and filtration of measured signal is needed. The electric drive needs implementation of frequency analysis, because of their technical development. In the field of the electromagnetic interference, there are certain traits in the frequency range of currents and voltages. This paper describes the results of an extensive series of measurements, which was carried out with anti-aliasing filter for different variable frequency of filter. Measurements were made with regard to the specific characteristics of semiconductor converters.