Bifurcation investigation and stability analysis for peak current mode input-series output-parallel DC-DC converters

摘要

This paper investigates nonlinear bifurcation behaviors in the input-series output-parallel (ISOP) connected DC-DC converters under peak current control operating in continuous conduction mode. Circuit simulation demonstrates typical nonlinear phenomena occurring in the ISOP connected DC-DC converters. A precise discrete-time mapping model is presented to analyze the stability and bifurcation phenomena in the ISOP connected DC-DC converters. Interaction of the outside voltage loop and inner loop leads to coexisting slow-scale and fast-scale bifurcation which is investigated under two different values of the bandwidth.