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In this article, an improved adaptive control strategy for the divided capacitor voltages of a full-bridge three-level (FBTL) dc/dc converter is put forward. First, a switching strategy is proposed and… Click to show full abstract
In this article, an improved adaptive control strategy for the divided capacitor voltages of a full-bridge three-level (FBTL) dc/dc converter is put forward. First, a switching strategy is proposed and the principles of the switching strategy are analyzed in detail. Second, the self-balance characteristics in four cases and the control strategy under large perturbation of the divided capacitor voltages in three cases are analyzed. Third, two methods to detect the divided capacitor voltages and one method to calculate the threshold voltages to convert different cases are investigated. Finally, a 600-KVA FBTL dc/dc based on MATLAB/SIMULINK and a 100-VA FBTL dc/dc converter experimental prototype are built and tested and the results verify the theoretical analysis.
Journal Title: IEEE Journal of Emerging and Selected Topics in Power Electronics
Year Published: 2021
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