Analysis of Simple Single/Parallel Switched Dynamical Systems Based on Two Switching Strategies

Yuki ISHIKAWA  Daisuke KIMURA  Yasuhide ISHIGE  Toshimichi SAITO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A   No.8   pp.2076-2083
Publication Date: 2008/08/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.8.2076
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Nonlinear Problems
synchronization,  chaos,  parallel dc-dc converters,  

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This paper studies two kinds of simple switched dynamical systems with piecewise constant characteristics. The first one is based on the single buck converter whose periodic/chaotic dynamics are analyzed precisely using the piecewise linear phase map. The second one is based on a paralleled system of the buck converters for lower voltages with higher current capabilities. Referring to the results of the single system, it is clarified that stable multi-phase synchronization is always possible by the proper use of the switching strategies and adjustment of the clock period. Presenting a simple test circuit, typical operations are confirmed experimentally.