Patent ID: 9325252
Filing Date: 2016-04-26
CPC Classification: H02M

Claim Text:
1. A power conversion system, comprising: a multilevel converter including first and second DC nodes, an AC node, and a converter circuit including switching devices and a plurality of switched capacitors, the converter circuit operative according to a plurality of switching control signals to provide a plurality of distinct voltage levels at the AC node, the multilevel converter comprising: a controller providing the switching control signals to the multilevel converter, the controller configured to compare a plurality of carrier signals or values to at least one reference signal or value to determine a desired AC node voltage level for operation of the multilevel converter, and to select from a plurality of redundant switching states for at least one of the distinct voltage levels at the AC node at least partially according to a control objective; wherein the controller provides the plurality of switching control signals to the plurality of switching devices of the first switching circuit and to the capacitor switching devices to provide the multilevel voltage at the AC node, the controller configured to select from among a plurality of redundant switching states for at least one of the distinct voltage levels at the AC node at least partially according to the desired AC node voltage level and the control objective.