Patent ID: 7956584

Claim:
An apparatus, comprising: an internal combustion engine; a first variable speed generator driven by the engine; a second variable speed generator driven by the engine; a first inverter to convert variable electric power from the first variable speed generator to provide a first controlled AC voltage at a first electrical output node; a second inverter to convert variable electric power from the second variable speed generator to provide a second controlled AC voltage at a second electrical output node, the first inverter and the second inverter being electrically connected together with a common electrical node to provide a third controlled AC voltage across the first output node and the second output node greater than each of the first controlled AC voltage and the second controlled AC voltage; and means for controlling the first inverter and the second inverter to provide a first power output waveform at the first electrical output node and a second power output waveform at the second electrical output node, the first power output waveform being approximately 180 degrees out of phase with the second power output waveform and the common node corresponding to a neutral line.