Commutation technique for an ac-to-ac converter based on state machine control
This invention is a technique that resolves current commutation challenges in various types of ac-ac switching power converters. It also applies to inverters and rectifiers with high-frequency links. Direct ac-ac converters such as matrix converters and cycloconverters benefit from the approach. This technology commutates load current without inserting dead-time into the switching sequence or using large inductors to limit shoot-through current. Both of these prior techniques intrinsically compromise a converter's performance and efficiency.