A Furtherance of High-Power Adjustable-Speed Drive Systems: Medium-Frequency ac Link-Powered Machine Drive Systems

High-power machine drive systems are the heart of the modern power industry and have been used in a broad range of industry applications. Extensive R&D efforts have been carried out on the design and implementation of high-power machine drive systems. In this article, various converter topologies and research progress for high-power machine drive systems are reviewed. And a novel medium-frequency ac link (MFACL)-powered machine drive system is analyzed and discussed for a furtherance of high-power adjustable-speed drive systems. In addition, some prospects for future research are highlighted to provide a feasible reference for practitioners.