Advanced active dv/dt filter for inverter powered drives with charge pulse and motor sided capacitance

Abstract:
Passively damped dv/dt filters are state of the art to reduce voltage overshoot at the end of long motor cables. The charge pulse technique can be used to eliminate the damping resistor and to reduce the filter losses. In this paper, it is proposed to place the filter capacitances at the end of the motor cable. In this case, the cable behaves purely inductive, so it can be used instead of the filter chokes. The paper shows simulations and measurements with a fast switching inverter and long cables.