Passivity-Based Control of the DC-DC Buck Converters in High-Power Applications

In this paper, a novel approach for control of the DC-DC buck converter in high-power and low voltage applications is proposed. Designed method is developed according to passivity based controller which is able to stabilize output voltage in a wide range of operation. It is clear that in high-power applications, parasitic elements of the converter may become comparable with load value and hence, in this paper all of the converted parasitic elements are modeled during development of the controller. In order to evaluate the accuracy and effectiveness of the proposed method, designed controller is simulated using MATLAB/Simulink toolbox. Presented simulation result proves that the developed controller has acceptable dynamic and steady-state responses which are compared with a standard PI controller in high-power applications.