Non-Smooth Bifurcation and Chaos in a DC-DC Buck Converter

1School of Science, Beijing University of Aeronautics and Astronautics, Beijing 1000832School of MEE, Hebei University of Science and Technology,Shijiazhuang 050054

Received Date: July 06, 2006

Published Date: March 31, 2007

Abstract

A direct-current--direct-current (DC-DC) buck converter with integrated load current feedback is studied with three kinds of Poincare maps. The external corner-collision bifurcation occurs when the crossing number per period varies, and the internal corner-collision bifurcations occur along with period-doubling and period-tripling bifurcations in this model. The multi-band chaos roots in external corner-collision bifurcation and often grows into 1-band chaos. A new kind of chaotic sliding orbits, which is more complex for non-smooth systems, is also found in this model.

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