Multilevel inverters (MLIs) are extensively used in industrial and renewable energy applications. They are a promising solution for the effective transformation of dc to ac. Researchers are developing auspicious topologies to mitigate the use of an output filter, which reduces cost and complexity. Hence, it is necessary to develop a topology that is capable of increasing output voltage levels with an optimum number of power electronic components. However, in developed topologies, a large number of switches, gate driver circuits, and dc sources are used. To solve this problem, a new MLI structure is introduced. The proposed structure is cascaded to form cascaded rectangular-type and circle-type topologies capable of engendering maximum output voltage levels and incorporating an optimum number of switches, gate driver circuits, and dc-sources. Moreover, conventional switching techniques have become more complex, while generating a staircase output contains a large number of levels. Therefore, this study proposes a novel switching technique that is easy to implement in MLIs with large output voltage levels. To show the competency of the proposed topology, a comprehensive comparison is performed with various structures. At the end of this study, validation of the proposed switching technique and topology is verified by simulations and experimentations.

中文翻译：

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一种新型开关技术的级联矩形和圆形多级逆变器的优化设计

多电平逆变器（MLI）广泛用于工业和可再生能源应用。它们是将直流电有效转换为交流电的有前途的解决方案。研究人员正在开发吉祥的拓扑结构，以减轻输出滤波器的使用，从而降低成本和复杂性。因此，有必要开发一种拓扑，该拓扑能够以最优数量的电力电子组件来增加输出电压电平。但是，在发达的拓扑结构中，使用了大量的开关，栅极驱动器电路和直流电源。为了解决这个问题，引入了一种新的MLI结构。所提出的结构被级联以形成级联的矩形和圆形拓扑，这些拓扑能够产生最大的输出电压电平并结合了最佳数量的开关，栅极驱动器电路和直流电源。此外，传统的开关技术变得更加复杂，而生成阶梯输出包含大量的电平。因此，本研究提出了一种新颖的开关技术，该技术易于在具有大输出电压电平的MLI中实现。为了显示所提出的拓扑的能力，对各种结构进行了全面的比较。在本研究的最后，通过仿真和实验验证了所提出的开关技术和拓扑结构的有效性。使用各种结构进行全面比较。在本研究的最后，通过仿真和实验验证了所提出的开关技术和拓扑结构的有效性。使用各种结构进行全面比较。在本研究的最后，通过仿真和实验验证了所提出的开关技术和拓扑结构的有效性。