In this paper, a novel single phase switched capacitor-based multilevel inverter topology is presented. The proposed topology is able to generate nine-level and 21-level output voltages for symmetric and asymmetric configuration of dc sources, respectively. The auxiliary H -bridge is not necessary to generate negative voltage levels, which reduces the voltage stress on the switches. The proposed switching scheme ensures the self-balancing of capacitors without any additional circuit. In order to generate the higher number of levels, two extended topologies are proposed with necessary mathematical expressions for various parameters. The effective comparison in terms of switches, diodes, capacitors, total standing voltage and cost function shows the advantages of proposed topology against recently developed topologies. The performance of the proposed topology is studied in MATLAB\Simulink platform and validated through the laboratory experimental tests. The performance of proposed topology for different frequencies, modulation indexes and load is studied, and corresponding results are presented.

中文翻译：

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一种具有对称和非对称配置的新型基于开关电容器的多电平逆变器

在本文中，提出了一种新颖的基于单相开关电容器的多电平逆变器拓扑结构。所提出的拓扑能够分别为直流电源的对称和非对称配置产生 9 级和 21 级输出电压。辅助 H 桥不需要产生负电压电平，从而降低了开关上的电压应力。所提出的开关方案可确保电容器的自平衡，而无需任何附加电路。为了生成更多的层次，提出了两种扩展拓扑，其中包含各种参数的必要数学表达式。在开关、二极管、电容器、总常压和成本函数方面的有效比较显示了所提出的拓扑相对于最近开发的拓扑的优势。在 MATLAB\Simulink 平台上研究了所提出拓扑的性能，并通过实验室实验测试进行了验证。研究了所提出的拓扑在不同频率、调制指数和负载下的性能，并给出了相应的结果。