US 11,863,067 B2
Bridge cascade system
Guoqing Cai, Anhui (CN); Jiacai Zhuang, Anhui (CN); Xinyu Wang, Anhui (CN); and Jun Xu, Anhui (CN)
Assigned to Sungrow Power Supply Co., Ltd., Hefei (CN)
Filed by Sungrow Power Supply Co., Ltd., Hefei (CN)
Filed on Nov. 17, 2021, as Appl. No. 17/528,273.
Claims priority of application No. 202011587863.5 (CN), filed on Dec. 29, 2020.
Prior Publication US 2022/0209659 A1, Jun. 30, 2022
Int. Cl. H02M 5/275 (2006.01); H02M 5/293 (2006.01); H02M 3/155 (2006.01); H02M 1/08 (2006.01)
CPC H02M 3/155 (2013.01) [H02M 1/08 (2013.01); H02M 5/275 (2013.01); H02M 5/293 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A bridge cascade system comprising at least one phase unit and a driving unit for the phase unit, wherein:
the phase unit comprises N bridge topologies cascaded on alternating current AC sides, where N is an integer greater than 1;
the driving unit comprises one driving power supply circuit, a plurality of bootstrap power supply circuits and 2N driving circuits;
in the phase unit, the driving power supply circuit powers the driving circuits directly or through corresponding bootstrap power supply circuits; and
the driving circuits are configured to provide driving signals for corresponding switch transistors in the phase unit.