EMC Filtering of Three-Phase PWM Converters

In modern Power Electronics systems high switching

frequencies are employed to increase power density,

but EMC filter components are responsible for a large

volumetric occupation of the power system. In some

cases the EMC filters required to fulfill EMC

regulations cover more than 30% of the total system

volume. In a world where space gets expensive, the

volumetric reduction of the components in EMC filters

is of great importance aiming for reduced dimensions.

This work proposed modeling techniques for the

generation and propagation of conducted emissions in

three-phase converters and filter concepts aiming to

meet EMC standards and reduce the volume of the EMC

filters.

Optimizing EMC filters requires several steps to be

performed, which are described here focusing on

three-phase PWM converters.

Finally, a discussion quantifying how much filters

strongly impact the volume of three-phase PWM

converter systems is preformed.