Abstract

In this paper, a nonlinear approach to modeling DC-DC PWM converters in continuous conduction mode (CCM) is presented. Specifically, a converter nonlinear model is implemented in MATLAB and SIMULINK for both the case without parasitic components (ideal case) and with parasitic components (non-ideal case). The implementation, which is based on the analytical computation of the periodic solutions in the high frequency steady-state operating condition, makes it possible to perform a systematic analysis of the dynamical behavior induced by the various perturbation sources acting on the converters. A comparison of the dynamics generated in the ideal and nonideal cases by step changes in duty cycle, input voltage and load resistance is reported for both the boost and buck converters.

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