US 12,244,222 B2
Power conversion circuit, power transmission system, and photovoltaic device
Yongbing Gao, Shanghai (CN); Dong Chen, Shanghai (CN); and Lei Shi, Shanghai (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Guangdong (CN)
Filed on Jan. 31, 2023, as Appl. No. 18/162,524.
Application 18/162,524 is a continuation of application No. PCT/CN2020/106375, filed on Jul. 31, 2020.
Prior Publication US 2023/0170792 A1, Jun. 1, 2023
Int. Cl. H02M 1/36 (2007.01); H02M 1/44 (2007.01); H02M 7/5387 (2007.01); H02J 3/00 (2006.01)
CPC H02M 1/36 (2013.01) [H02M 1/44 (2013.01); H02M 7/5387 (2013.01); H02J 3/00 (2013.01); H02J 2300/24 (2020.01)] 17 Claims
OG exemplary drawing
 
1. A power conversion circuit, comprising:
a first bridge arm, the first bridge arm comprising a first upper bridge arm and a first lower bridge arm, the first upper bridge arm comprises an upper switching component connected between an input positive end and an output end, the first lower bridge arm comprises a lower switching component connected between the output end and an input negative end, the upper and lower switching components comprise a switching transistor and a first diode anti-parallel connected to the switching transistor, a first end of an upper switching transistor of the first upper bridge arm is connected to the input positive end and a second end is connected to the output end, and a first end of a lower switching transistor of the first lower bridge arm is connected to the output end and a second end is connected to the input negative end; and
a unilateral conduction component, wherein one or both of the first upper bridge arm and the first lower bridge arm is/are separately connected in parallel to the unilateral conduction component, and a conduction direction of the unilateral conduction component is the same as a conduction direction of the first diode of the switching component of the first bridge arm, to at least divide an abnormal current flowing through the first diode when a fault occurs.