Robust multiple frequency design on voltage-mode control of DC-DC boost converters

This paper develops robust multiple frequency voltage-mode control for a DC-DC boost converter with parameter uncertainties as well as load and source voltage disturbances. By frequency characteristics on the different types of disturbances, multiple frequency intervals are addressed in a small signal model of the DC-DC boost converter. Then the analysis on stability and robustness is presented over the multiple frequency intervals via an integral quadratic constraint method. A two-stage algorithm is designed to obtain a specific voltage-mode controller ensuring desired H infinity performance. Simulation results demonstrate the superiority of the proposed controller on the H infinity performance level, the maximum voltage fluctuation and the regulating time. Furthermore, some experiments are conducted to illustrate the superior performance of the proposed controller in actual voltage regulation. (c) 2022 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.