A passivity-based controller for an interleaved boost PFC converter

Abstract

This paper reveals a passivity-based control technique for the interleaved boost PFC converter. First, an Euler-Lagrange (EL) mathematical formulation for the interleaved boost PFC converter is developed. Then, the passivity-based control methodology is implemented in the system. The output voltage can be maintained constant via the introduction of the notion of the energy modification in passive components. In the controller design, the energy of the system is made non-conservative by adding damping factor. That makes the system become passive against disturbances. This paper develops a polynomial function for the damping injection to keep the desired output voltage constant against the variation of load current and input supply. The proposed controller offers several features such as ease of implementation, no tuning of parameters like proportion integral controller, robustness against disturbances as well. A Simulink model with the proposed controller is developed using MATLAB/Simulink block and its performances are investigated under various operating conditions. Further, real-time implementation, the stability analysis for the proposed controller is also carried out.