This article presents a modular switched-capacitor multilevel inverter which uses two capacitors and a single dc source to obtain triple voltage gain. It is worth noting that the inherent inversion capacity removes the H-bridge, which can efficaciously diminish the voltage stress of switches, and the maximum voltage stress (MVS) on devices is kept within 2V_dc. Additionally, the proposed topology is able to integrate inductive load, and the capacitor voltage self-balancing can be achieved. Moreover, the modular structure also has an expandable topology which can generate more levels and raise the voltage gain by using multiple switched-capacitor units, meanwhile the voltage stress on power switches can be kept within 2V_dc. Furthermore, comprehensive analysis and comparison with other multilevel inverters have been implemented to certify the superiority of the proposed topology. Finally, the steady-state and dynamic performance of the proposed topology is examined through a seven-level inverter prototype, the validity and practicability of the topology are verified by simulations and experiments.

本文介绍了一种模块化开关电容多电平逆变器，该逆变器使用两个电容器和一个直流电源来获得三倍电压增益。值得注意的是，固有的逆变能力去除了H桥，可以有效地降低开关的电压应力，器件上的最大电压应力（MVS）保持在2 V _dc以内。此外，所提出的拓扑结构能够集成感性负载，并且可以实现电容器电压自平衡。此外，模块化结构还具有可扩展的拓扑结构，可通过使用多个开关电容单元产生更多电平并提高电压增益，同时功率开关上的电压应力可保持在 2 V _dc以内. 此外，通过与其他多电平逆变器的综合分析和比较，证明了所提出拓扑的优越性。最后，通过一个七电平逆变器样机检验了所提出拓扑的稳态和动态性能，并通过仿真和实验验证了该拓扑的有效性和实用性。