Presentation Details
| Stabilization of Chaotic Dynamics in Current-Mode DC–DC Boost Converters via Simscape-Based Delayed Feedback Control Ammar Nimer Natsheh1, Sohad Abu-Elzait2, Bereket Kebede Bedada1, Yassine Benachour1. 1Higher Colleges of Technology, Dubai Academic City, Dubai, United Arab Emirates.2Appalachian State University, Boone, NC, USA |
Abstract
Current-mode controlled DC–DC boost converters are widely used in power electronic systems but are known to exhibit nonlinear dynamic behavior, including bifurcations and chaos, under certain operating conditions. Such chaotic operation can degrade performance and stability, motivating the need for effective control strategies. In this paper, the nonlinear dynamics of a current-mode controlled DC–DC boost converter are investigated using a physics-based Simscape modeling framework in MATLAB/Simulink. By varying the reference current, a sequence of operating regimes including period-1, period-2, period-3, and chaotic behavior is identified through time-domain waveforms, frequency spectra, and phase portraits. A delayed feedback control scheme is then applied to suppress chaos at a fixed reference current. The controller performance is evaluated for two different delay values, demonstrating successful stabilization of the chaotic orbit and recovery of periodic operation. The results highlight the effectiveness of delayed feedback control and demonstrate the suitability of high-fidelity Simscape simulations for analyzing and controlling nonlinear phenomena in power electronic converters.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.