Experimental Identification of Uncertainties in Dynamics of PWM Buck Converter

Abstract

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.

Hysteretic Bifurcation Model of the Boost Converter

“…Researchers should keep in mind that steady-state responses in vicinity of hysteretic region are extremely sensitive on circuit parameters and initial conditions. Moreover, "small" variations of circuit parameters and initial conditions are not under control of researcher as is considered in [17].…”