Novel Topologies Creation and Technical Framework Reconstruction of Multilevel Power Converters

本文的研究成果如下：(1)发现了具有完全不同电路结构和工作原理的多电平功率变换器的新颖拓扑结构，对多电平技术的框架进行了扩展和重构。(2)综合比较了传统拓扑和新型拓扑的半导体数量、无源元件数量、电源数量、隔离驱动电路数量、功率转换效率以及实现和控制的难度。(3)采用了一些新的拓扑结构，以便在使用下一代半导体（如SiC-MOSFET）的功率变换器中使用。

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.