Abstract
This paper summarizes the multilevel power conversion technologies published in THE IEEJ TRANSACTIONS ON INDUSTRY APPLICATIONS and presented at IEEJ Technical Meetings on Semiconductor Power Converter or Japan Industry Applications Society Conferences (JIASC) as well as international conference proceedings and journals. This survey includes various types of circuit topologies from the first neutral-point clamped PWM converter to the hottest modular multilevel cascaded converters, and their applications. In addition, some new circuit topologies of multilevel converters for low voltage applications are also reported.
