级联模块化多电平变换器与交交变频器驱动系统的扩展频率范围运行

The cascaded modular multilevel converter (MMC) and cycloconverter (CCV)-based machine drive system is a promising solution for high-power machine drive applications. However, its output frequency is limited due to the characteristics of CCV. In this article, an extended frequency range operation for the cascaded MMC- and CCV-based drive system is proposed. The proposed operation scheme includes t...