公开(公告)号：US09859816B2

公开(公告)日：2018-01-02

申请号：US15279446

申请日：2016-09-29

申请人： Delta Electronics (Shanghai) Co., Ltd.

发明人： Feng Chen ,  Cheng Lu ,  Wei-Qiang Zhang ,  Hong-Yang Wu

IPC分类号： H02M7/537 ,  H02M7/5387 ,  H02M7/5395 ,  H02M7/487 ,  H02M1/00

CPC分类号： H02M7/537 ,  H02M7/487 ,  H02M7/53871 ,  H02M7/5395 ,  H02M2001/0025 ,  H02M2001/0054 ,  Y02B70/1491

摘要： A method for controlling modulation wave and a three-phase three-wire three-level circuit are provided. The method for controlling modulation wave is applied in the three-phase three-wire three-level circuit. Three bridge arms of the three-phase three-wire three-level circuit correspond to three modulation waves. The three-phase three-wire three-level circuit is controlled by comparing said three modulation waves and a carrier wave. The method for controlling modulation wave includes: obtaining a primary modulation wave from said modulation waves based on currents corresponding to each phase of the three-phase three-wire three-level circuit; and adding a shifting quantity to said three modulation waves such that the primary modulation wave is shifted to a peak value, a valley value, or a middle value between the peak value and the valley value of the carrier wave.