New Topology of Three-phase Three voltage levels inverter using a novel precalculated switching method

This paper presents a New Topology of Three Phases voltage with three Levels Inverter (NTTPTVLI) using precalculated voltage levels and switching angles. We have developed a computing model which calculates the voltage levels and the switching angles only in the one-sixth of period. Voltage levels and switching angles are deduced in the remaining five-sixth of period by symmetries. The voltage levels and the switching angles are precalculated so as to eliminate a maximum number of successive low ranked harmonics for a given fundamental magnitude voltage and a given number of switching per one-sixth period.