Power converter system and method

A three-phase power converter comprising:

• a converter configured to convert a three phase AC power input to a DC power output, the DC power output being provided to high and low sides of a DC bus;
• an inverter coupled to the DC bus and configured to convert the DC power to a three phase AC output, wherein the inverter comprises three legs and each leg comprises a pair of solid state switches and a respective output therebetween;
• and
• a common mode voltage control filter comprising three filter inputs and two filter outputs, each filter input coupled to an output of a respective leg of the inverter and each filter output coupled to a respective side of the DC bus;
• the common mode voltage control filter comprising an inductor, a resistor, and a capacitor in series for each filter input;
• wherein the common mode voltage control filter is coupled to a capacitor network extending across the DC bus.

A three-phase power converter comprising:

• a converter configured to convert a three phase AC power input to a DC power output, the DC power output being provided to high and low sides of a DC bus;
• an inverter coupled to the DC bus and configured to convert the DC power to a three phase AC output, wherein the inverter comprises three legs and each leg comprises a pair of solid state switches and a respective output therebetween;
• and
• a common mode voltage control filter comprising three filter inputs and two filter outputs, each filter input coupled to an output of a respective leg of the inverter and each filter output coupled to a respective side of the DC bus;
• the common mode voltage control filter comprising an inductor, a resistor, and a capacitor in series for each filter input;
• wherein the common mode voltage control filter is coupled to a capacitor network extending across the DC bus, wherein the capacitor network comprises two capacitors and is coupled to a common node of the inductor, the resistor, and the capacitor in series for each filter input.

A common mode voltage control filter adapted for use in a power converter system, the filter comprising:

• three filter inputs and two filter outputs;
• an inductor, a resistor, and a capacitor in series for each filter input;
• and
• a capacitor network coupled to a common node of the inductor, the resistor, and the capacitor in series for each filter input.