期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 1, 页码 633-641出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3051551
关键词
Voltage control; Buck converters; Sliding mode control; Convergence; Heuristic algorithms; Switching frequency; Uncertainty; Cascade structure; dc-dc converter; hardware in loop; second-order sliding mode; super twisting algorithm (STA)
This article proposes a second-order sliding mode control law based on a super twisting algorithm for regulating the output voltage of a dc-dc buck converter. The performance of this method is compared with other sliding mode control algorithms, and it achieves the fastest convergence, consistent chattering reduction, smallest settling time, and small steady-state error during load changes.
This article proposes a second-order sliding mode control law, based on a super twisting algorithm (STA), aimed at regulating the output voltage of a dc-dc buck converter. A closed-loop system is designed consisting of two distinct nested loops organized within a cascaded STA structure. Several sliding mode control algorithms are here surveyed for the regulation of a dc-dc buck converter. The STA of second-order sliding mode is also experimented in an HIL system. The comparative evaluations include comparing the output voltage transient responses to load step changes for all developed sliding mode control algorithms and the start-up responses of the output voltage to step changes of the input voltage of the buck converter. Furthermore, theoretical considerations, numerical simulations, and experimental results from a laboratory prototype are compared, at different operating points, for all surveyed control methods. It results from the simulations and experiments that the designed STA achieves the fastest convergence, a consistent chattering reduction, the smallest settling time under loaded situations, and small steady-state error during load changes over all contrasted control methods.
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