A Reduced Device Count Single DC Hybrid Switched-Capacitor Self-Balanced Inverter

摘要

Multilevel inverter (MLI) with switched-capacitor combinations have attained lots of attention for reducing the switch count, source count and control complexity. This brief discloses a cross-switched hybrid 13-level inverter (CHI) topology consisting of switched-capacitor circuits. The proposed CHI includes a single-dc source and only 12 switches to generate the 13-level triple voltage boost output. The desired output voltage levels are realized by self-balanced operation of the capacitors. The voltage across two capacitors is inherently maintained at input dc voltage (Vin) and other two capacitors are self-charged to 0.5Vin, which reduces the control complexity. Comparative assessment with prior-art MLIs indicates the merits such as fewer devices and low voltage stress of proposed CHI. To ascertain the operational principles simulation and experimental results are finally acquired under several steady and dynamic conditions.