A new time-sharing charge 5L inverter

Cascade multilevel inverter has been proposed for high voltage applications. However, such a topology always requires an isolated multiphase transformer for individual inverter cells, which increases the weight, volume and cost of equipment, as well as wiring complexity on transformer's secondary side. In this paper, a new flying capacitor 5 level (FC 5L) inverter with single DC source is proposed, utilizing switching pattern control as well as time-sharing charge concept. Validity during commutation period is also analyzed. Performance such as 5 level output phase voltage, voltage balancing of flying capacitors are verified by simulation.