Differential and common mode link dampener

A common mode and a differential mode filter between a first Direct Current (DC) link and a second DC link, each link having a positive rail and a negative rail, the filter comprising:

• a first inductor respectively connected to each of the positive rail and the negative rail;
• a differential mode damping resistance connected in parallel to each of the first inductors, respectively;
• and
• a three-wire choke comprising a first wire connected in series with the differential mode damping resistance parallel to the positive rail, a second wire connected in series with the differential mode damping resistance parallel to the negative rail and a third wire connected to a common mode damping resistance, where the common mode damping resistance is galvanically isolated from differential mode transients flowing through the differential mode damping resistances of the positive and negative rails,
• wherein a differential mode inductance of the first inductor connected to the positive rail and the first inductor connected to the negative rail, and the differential mode damping resistances of the positive and negative rails, provide a differential mode filter for the positive rail and the negative rail, and
• a common mode inductance of the first inductor connected to the positive rail and the first inductor connected to the negative rail, and the common mode damping resistance coupled by the three-wire choke, provide a common mode filter.