The present invention relates to a multi-level inverter and to a method for providing a multi-level output voltage with a multi-level inverter, the multi-level inverter comprising at least one cascaded H bridge multi-level module, each H bridge multi The level module comprises a first H bridge multilevel leg and a second H bridge multilevel leg connected in parallel and each of the first and second H bridge multilevel legs is connected via a coupled inductor A first inverter leg and a second inverter leg that are coupled in parallel and wherein the first and second inverter legs are coupled to each other to provide first and second input voltages having a plurality of voltage levels, Coupled to the primary winding and the secondary winding of the coupled inductor, the primary and secondary windings of the coupled inductor are connected in series It is, and junction node of the primary and secondary windings, forms the output terminal of the H-bridge multilevel legs, the first input voltage has a predetermined phase shift relative to the second input voltage. Multilevel inverters can have smaller changes in output voltage and therefore eliminate problems caused by large changes in output voltage.
展开▼
