Patent ID: 7928592

Claim:
A power system for providing an output power to a load, the system comprising; a generator configured to generate an alternating current input power to a power converter system; a power converter system coupled to the generator and interconnected to generate an output power and provide the output power to the load, wherein the converter system includes a plurality of parallel converter threads; each parallel converter thread including, in series, a semiconductor bridge ac-to-dc converter and a semiconductor bridge dc-to-ac converter; a converter control system coupled to the power converter system and configured to drive the converter system to reduce harmonic components in the output power or the alternating current input power; and isolation means for the input power to the converter from the generator, preventing common mode current circulating between the parallel converter threads as powered by voltage differences between the parallel converter threads generated by switching of power semiconductors of the semiconductor bridges of the parallel converter threads, the isolation means including a plurality of sets of electrically isolated power windings on the generator wherein each set of the plurality of sets of electrically isolated power windings on the generator electrically interconnects only with a corresponding parallel converter thread of the plurality of parallel converter threads, and wherein the set of isolated power windings on the generator comprises a three-phase power winding and each of the plurality of parallel converter threads comprises a three-phase power input.