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Low component merged cells cascaded-transformer multilevel inverter featuring an enhanced reliability

机译：低组件合并单元级联变压器多电平逆变器，具有增强的可靠性

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Requiring lots of components is the main demerit of multilevel inverters. This problem makes them expensive, bulky, and with a high possibility of failure. Therefore, the issue of components reduction in multilevel topologies is of great importance. Cascaded transformers multilevel inverter (CTMI) is a converter that employs only one DC-source, thus it eliminates the need for several DC-sources. Same as the other multilevel inverters, CTMI consists of lots of components. This disadvantage of CTMI has been resolved through a new reduced components topology introduced in the present work. This topology uses almost half the number of switching elements, such as power switch and gate driver, which are required to construct a conventional CTMI for the same output voltage levels. Furthermore, to the end of enhancing the reliability of CTMI, this paper, using Markov reliability evaluation approach and evaluating the reliability and the Mean Time To Failure (MTTF) of the converters, has investigated the reliability of both the conventional and the proposed structures. Additionally, in order to prove the feasibility and correctness of the suggested topology computer aid simulation results along with the experimental results have been provided.
机译：需要大量组件是多电平逆变器的主要缺点。这个问题使它们昂贵，笨重并且极有可能发生故障。因此，减少多级拓扑中的组件非常重要。级联变压器多电平逆变器（CTMI）是仅使用一个直流电源的转换器，因此无需多个直流电源。与其他多电平逆变器一样，CTMI由许多组件组成。 CTMI的这一缺点已通过本工作中引入的新的简化组件拓扑得以解决。这种拓扑几乎使用一半的开关元件（例如电源开关和栅极驱动器），而这些元件是构造具有相同输出电压电平的常规CTMI所必需的。此外，为提高CTMI的可靠性，本文采用马尔可夫可靠性评估方法，对转换器的可靠性和平均故障时间（MTTF）进行了评估，研究了传统结构和拟议结构的可靠性。此外，为了证明所建议的拓扑计算机辅助仿真结果的可行性和正确性，并提供了实验结果。

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