An Asymmetrical T-Type Boost Multilevel Inverter Topology

Abstract

Single-stage DC-AC power conversion is investigated due to high efficiency and a more straightforward structure than the two-stage equivalent system, where a boost DC-DC converter is needed. Moreover, multilevel inverters offer various advantages in terms of output voltage quality, electromagnetic interference, etc. Therefore, boost multilevel inverters can be used in many applications like renewable energy sources, electric vehicles, and battery applications. In this paper, a new boost multilevel inverter topology, in which boost ratio and the number of output voltage levels can increase to any number, is proposed. The asymmetrical voltage of capacitors in the proposed topology creates more voltage levels without increasing the number of components. In addition, capacitor voltages are automatically balanced and no extra voltage sensors or auxiliary supplies are required.