Multicell converters: Basic concepts and industry applications

Multicell converters were introduced ten years ago. This paper summarizes the main results obtained through the research done on these converters over this period: topology and derivation of multicell choppers and voltage-source inverters, harmonics cancellation, open-loop modulation techniques, self-balancing understanding, and optimization. During this same period, industrial products using this technique have been developed and the corresponding know-how has contributed to the field in various ways, such as modular design, low inductance busbars, specific drivers, etc.