Triphase Cascaded Converters with Direct Synchronous Pulswidth Modulation

Three-level and multilevel converters are a subject of increasing interest in the last years due to some advantages compared with standard three-phase inverters. One of the most perspective topology of multilevel converters for high power adjustable speed drive application is a novel triphase cascaded (modular) converter that uses three standard triphase inverter modules along with an 0.33 p.u. output transformer [1–3].