Abstract
The direct current (DC)–DC converter presents abundant nonlinear phenomena, such as periodic bifurcation and chaotic motion, under certain conditions. For a switched-inductor buck-boost (SIBB) converter with the memristive load, this paper constructs its state equation model under two operating statuses, investigates its chaotic dynamic characteristics, and draws and analyzes the bifurcation diagrams of the inductive current and phase portraits, under some parameter changing by the MATLAB simulation based on the state equation. Then, by applying certain minor perturbations to parameters, the chaotic phenomenon suppression method is explored by controlling peak current in continuous current mode (CCM) to keep the converter run normally. Finally, the power simulation (PSIM) verifies that the waveforms and the phase portraits controlling the corresponding parameters are consistent with those of the MATLAB simulation.
Highlights
Converter Based on the Memristor.Power electronic technology has developed rapidly in recent years
The purpose of this paper is to investigate the bifurcation and chaotic behavior of the switched-inductor buckboost (SIBB) converter with the memristive load when the peak current changes
The nonlinear behavior of the SIBB converter in continuous current mode (CCM) is observed by using the memristive load instead of the resistive load
Summary
One paper [11] studied the nonlinear phenomena in the switched-inductor buck-boost (SIBB) converter in continuous current mode (CCM). Another [12] investigated the various nonlinear behaviors of the SIBB converter under the resistive load in discontinuous current mode (DCM). A further study [13] has discussed chaos and its control of the current-mode switched-inductor converter Another part of the literature [14] indicated that the SIBB converter can shift from DCM to CCM, and can operate in steady period-one state by utilizing ramp compensation. The purpose of this paper is to investigate the bifurcation and chaotic behavior of the SIBB converter with the memristive load when the peak current changes. The harmful bifurcation and chaotic behavior are suppressed by controlling the peak current
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