US 12,294,286 B2
Power conversion device and voltage control method
Xiaoping Fu, Shanghai (CN); and Xinghua Zhang, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Aug. 25, 2022, as Appl. No. 17/822,141.
Claims priority of application No. 202111481016.5 (CN), filed on Dec. 6, 2021.
Prior Publication US 2023/0179078 A1, Jun. 8, 2023
Int. Cl. H02M 1/00 (2007.01); H02M 1/42 (2007.01)
CPC H02M 1/0025 (2021.05) [H02M 1/0009 (2021.05); H02M 1/0012 (2021.05); H02M 1/4291 (2021.05)] 18 Claims
OG exemplary drawing
 
1. A power conversion device, comprising:
a first stage circuit configured to generate a first output voltage;
a second stage circuit configured to receive the first output voltage and generate an output current and a second output voltage; and
a control unit configured to control the first stage circuit according to a set value of the output current, thereby adjusting the first output voltage,
wherein the first stage circuit receives an input voltage, and the control unit is configured to further control the first stage circuit according to the input voltage, thereby adjusting the first output voltage,
when the input voltage is less than a second threshold, and the set value of the output current is less than a first threshold, the control unit is configured to adjust the first output voltage to a first voltage;
when the input voltage is less than the second threshold, and the set value of the output current is greater than or equal to the first threshold, the control unit is configured to adjust the first output voltage to a second voltage; and
when the input voltage is greater than or equal to the second threshold, the control unit is configured to adjust the first output voltage to the first voltage.