Three-phase NPC inverter using three-phase coupled inductor

A new NPC three-phase inverter with three-phase coupled inductor is presented in this paper. Initially the power stage diagram is shown and discussed. Their main characteristics are described and the more relevant waveforms, generated by simulation, are shown. Next, the employed modulation and converter operation are discussed and some relevant figures are presented. After that, the presence of the three-phase coupled inductor to provide significant reduction in harmonic distortion is discussed. Finally, experimental results obtained from the implemented prototype are presented and briefly discussed.