Patent ID: 7602626
Filing Date: 2009-10-13
Classification: H02M

Abstract:
1. A power conversion apparatus comprising a plurality of single-phase inverters having respective AC and DC sides and that convert DC power from a plurality of DC power sources to AC power, the plurality of single phase inverters being connected in series, wherein the apparatus produces an output voltage that is a sum of generated voltages from a combination of single-phase inverters selected from the plurality of single-phase inverters, the plurality of single-phase inverters includes a first inverter having as an input an output voltage produced by a first DC power source producing the highest output voltage of the plurality of DC power sources, at least one second inverter is connected to a first terminal on the AC side of the first inverter, and at least one third inverter is connected to a second terminal on the AC side of the first inverter, and total output voltage of the second inverter is substantially equal to total output voltage of the third inverter.