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This paper deals with design of a robust control for two level Boost DC-DC converter (TLBC) operating in continuous conduction mode (CCM). The switched model describing the converter operation is presented and the design procedure of sliding mode control taked as of robust law is described. For validation, Matlab/Simulink software has been used. The robustness of the controller is tested for input voltage variations and load changes. The simulation results show that the efficiency and robustness of this controller are better than those of the cascade PI controller.

This paper presents a robust linear quadratic regulator (LQR) based on deduction of Q-R matrix to find optimal gains for a DC-DC multilevel boost converter (MBC) operating in conduction continuous mode (CCM). Depending on converter's commutation states and using the electrical equivalent circuits, the mathematical model of MBC converter is built. A nonlinear reduced order model of two level boost converter is also obtained. For validation, Matlab/Simulink software has been used. The simulation results are presented and a comparaison studies with PI controller are perfomed. It has been shown that the robusteness of robust LOR controller is better than PI controller.