3-레벨 NPC 인버터의 중성점 전압 제어를 위한 DPWM 기법의 옵셋 전압 인가방식

A study on the 3-phase inverter has increased nowadays. 3-Level NPC Inverter have series-connected two DC link capacitors and neutral-point, to structural. So DC link capacitors occur voltage imbalance problem. In this paper, we suggest the way how we can control neutral voltage by DPWM..