Space vector pulse width modulation control of three-phase multi-level inverters

Abstract

An inverter system includes an inverter having a plurality of switching elements arranged with at least three levels, where the inverter is configured to receive a direct current input and output an alternating current to three phases. The inverter system also includes a controller configured to determine a reference voltage angle based on a first voltage and a second voltage that are orthogonal components of a reference voltage and determine a sector of a space vector map of the reference voltage based on the reference voltage angle. The controller is also configured to determine an active time pair of vector states associated with on-off states of the switching elements to modulate between based on the sector and the reference voltage angle and output a carrier waveform for each of the three phases to control modulation of the switching elements to achieve the reference voltage for the three phases.

Dependencies are inferred from the claim text.