变压器三相付方绕组数减至1/6，且不移相，还能四象限运行。

关键词：H桥级联变频器；5电平H桥；二极管整流；5L-AFE整流

Abstract: Conventional cascaded inverters based on 3-level H-bridge (3L-CHB) have been most widely applied for medium-voltage drives in China