Hysteresis current regulation of three phase flying capacitor inverter with balanced capacitor voltages

This paper presents a new hysteresis current regulation strategy for a three-phase three-level flying capacitor multilevel inverter, that uses the zero-crossing of the averaged phase leg output voltages to select the switched output level for each inverter phase leg. Consequently each phase leg requires only one hysteresis comparator to generate its switching signals, which significantly improves its performance compared to multiple band strategies.