Experimental Identification of Uncertainties in Dynamics of PWM Buck Converter

The paper is dedicated to the development of experimental bifurcation analysis and is focused on the research of uncertainties in dynamics of an operating process in application to PWM buck converters. The experimental bifurcation analysis follows the approach which allows to identify some qualitative thresholds through the successive evolution of the system behaviour caused by the complex interplay between bifurcation and noise components. In according to the approach the 2D-operating process domain is built and is divided onto three kinds of the uncertainty zones. The computational and experimental results are discussed from the practical experience concerning the ways to prevent the abnormal processes in dynamics of PWM buck converters.