Nonlinear Analysis and Control of Interleaved Boost Converter using Real Time Cycle to Cycle Variable Slope Compensation

摘要

Switched-mode power converters are inherently\udnonlinear and piecewise smooth systems which may exhibit a\udseries of undesirable operations that can greatly reduce the\udconverter’s efficiency and lifetime. This paper presents a\udnonlinear analysis technique to investigate the influence of system\udparameters on the stability of interleaved boost converters. In this\udapproach, Monodromy matrix which contains all the\udcomprehensive information of converter parameters and control\udloop can be employed to fully reveal and understand the inherent\udnonlinear dynamics of interleaved boost converters, including the\udinteraction effect of switching operation. Thereby not only the\udboundary conditions but also the relationship between stability\udmargin and the parameters given can be intuitively studied by the\udeigenvalues of this matrix. Furthermore, employing the\udknowledge gained from this analysis a real time cycle to cycle\udvariable slope compensation method is proposed to guarantee a\udsatisfactory performance of the converter with extended range of\udstable operation. Outcomes show that systems can regain stability\udby applying the proposed method within a few time periods of\udswitching cycles. The numerical and analytical results validate the\udtheoretical analysis, and experimental results verify the\udeffectiveness of the proposed approach