Patent ID: 8942019
Filing Date: 2015-01-27
Classification: H02M

Abstract:
1. A method of operating a multilevel inverter circuit, the method comprising: modulating a first main switch and a first neutral switch during generation of a positive half cycle of an output of the multilevel inverter circuit, the first main switch switching on and off to connect and disconnect an output node of the multilevel inverter circuit to a positive node, the first neutral switch switching on and off to connect and disconnect the output node of the multilevel inverter circuit to a neutral potential; detecting a flow direction of alternating current (AC) current output of the multilevel inverter circuit; and in response to detecting that the AC current output of the multilevel inverter is flowing in a positive direction towards a load, eliminating dead time between switching of the first neutral switch and the first main switch during the generation of the positive half cycle of the output of the multilevel inverter circuit.