Novel Topologies Creation and Technical Framework Reconstruction of Multilevel Power Converters

本文的主要研究成果如下：（1）发现了电路结构和工作原理完全不同的新型多电平功率变换器拓扑结构，扩展和重构了多电平技术的框架。(2)全面比较的半导体计数，无源元件计数，电源计数，隔离驱动电路计数，功率转换效率和实现和控制的难度之间进行了传统的和新的拓扑结构。以及（3）采用一些新颖的拓扑结构以可能用于使用下一代半导体（例如SiC-MOSFET）的功率转换器。

The achievements of this research work are as follows:(1) Novel topologies of the multilevel power converters that have completely different circuit configuration and operation principle have been discovered, and the framework of the multilevel technology has been expanded and reconstructed. (2) Comprehensive comparison of the semiconductor counts, the passive element counts, power supply counts, isolated drive circuit counts, power conversion efficiency and difficulty of implementation and control has been conducted between conventional and novel proposed topologies. and (3) Some novel topologies are taken up for possible utilization in power converters using next-generation semiconductors such as SiC-MOSFET.