US 12,249,905 B2
Serial-parallel converter protection system, controller, and converter
Zhen Cao, Shanghai (CN); Dong Chen, Shanghai (CN); and Xiaofeng Yao, Shenzhen (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Feb. 27, 2023, as Appl. No. 18/174,855.
Application 18/174,855 is a continuation of application No. PCT/CN2021/093999, filed on May 17, 2021.
Claims priority of application No. 202010899466.5 (CN), filed on Aug. 31, 2020.
Prior Publication US 2023/0223835 A1, Jul. 13, 2023
Int. Cl. H02M 1/088 (2006.01); H02J 3/38 (2006.01); H02M 1/32 (2007.01); H02M 3/158 (2006.01)
CPC H02M 1/088 (2013.01) [H02J 3/38 (2013.01); H02M 1/32 (2013.01); H02M 3/158 (2013.01); H02J 2300/24 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A serial-parallel converter protection system; comprising:
a controller;
a drive;
a first switching transistor, wherein an input terminal of a converter is connected to an output terminal of the converter through the first switching transistor and the controller is connected to the first switching transistor through the drive and is configured to control the first switching transistor;
a second switching transistor, wherein the output terminal of the converter is connected in parallel with the second switching transistor, the controller is connected to the second switching transistor through the drive and is configured to control the second switching transistor; and
a voltage sensor configured to separately detect an input voltage and an output voltage of the converter, wherein, after the output voltage of the converter is greater than a first threshold, the controller controls the first switching transistor to be turned off and controls the second switching transistor to be turned on.