US 11,695,317 B2
Converter control method, converter control apparatus, and readable storage medium
Jinfeng Gao, Ningde (CN); Guiying Lin, Ningde (CN); Weichen He, Ningde (CN); Zhimin Dan, Ningde (CN); Lijun Hang, Ningde (CN); Yuanbin He, Ningde (CN); Ke Chen, Ningde (CN); and Jiarui Liao, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Jul. 1, 2022, as Appl. No. 17/856,453.
Application 17/856,453 is a continuation of application No. PCT/CN2021/089402, filed on Apr. 23, 2021.
Prior Publication US 2022/0345023 A1, Oct. 27, 2022
Int. Cl. H02M 1/00 (2006.01); H02M 3/00 (2006.01); H02M 3/335 (2006.01)
CPC H02M 1/0003 (2021.05) [H02M 1/0025 (2021.05); H02M 3/01 (2021.05); H02M 3/33573 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A method for controlling a converter, wherein the converter comprises a switch tube, and the method comprises:
obtaining a real-time input voltage and a real-time output voltage of the converter;
determining a corresponding real-time closed-loop control output value of the converter based on the real-time input voltage and the real-time output voltage by using a closed-loop control algorithm;
determining a real-time control strategy of the switch tube from a plurality of control strategies based on the real-time closed-loop control output value; and
controlling the switch tube based on the determined real-time control strategy;
wherein when the converter is an isolated resonant direct current converter, determining the real-time control strategy of the switch tube from the plurality of control strategies based on the real-time closed-loop control output value comprises:
when the real-time closed-loop control output value is greater than or equal to a first preset value, determining the real-time control strategy as a pulse frequency modulation control strategy;
when the real-time closed-loop control output value is less than the first preset value and greater than a second preset value, determining the real-time control strategy as a pulse width modulation control strategy, wherein the first preset value is greater than the second preset value; and
when the real-time closed-loop control output value is less than or equal to the second preset value, determining the real-time control strategy as a pulse density modulation control strategy.