Dynamical analysis and experimental verification of valley current controlled buck converter

doi:10.1088/1674-1056/19/5/050509

Abstract The dynamical behaviours of valley current controlled buck converter are studied by establishing its corresponding discrete iterative map model in this paper. Time-domain waveforms and phase portraits of valley current controlled buck converter are obtained by Runge--Kutta algorithm through a piecewise smooth switching model. The research results indicate that the valley current controlled buck converter exhibits rich nonlinear phenomena, and it has routes to chaos through period-doubling bifurcation and border-collision bifurcation in a wide parameter range. Interesting inverse nonlinear behaviours compared with peak current controlled buck converter are observed in the valley current controlled buck converter. Analysis and simulation results are verified by experimental results.

Keywords: buck converter bifurcation dynamical behaviour iterative map

Received: 28 August 2009
Revised: 29 October 2009
Accepted manuscript online:

PACS:	84.30.Jc	(Power electronics; power supply circuits)
	05.45.Gg	(Control of chaos, applications of chaos)
	02.60.-x	(Numerical approximation and analysis)

Fund: Project supported by the National Natural Science Foundation of China (Grant No.~50677056), the Doctoral Innovation Foundation of Southwest Jiaotong University of China, the Cultivation Project of Excellent Doctorate Dissertation of Southwest Jiaotong University of China, and the Natural Science Foundations of Jiangsu Province, China (Grant No.~BK2009105).

Cite this article:

Zhou Guo-Hua(周国华), Bao Bo-Cheng(包伯成), Xu Jian-Ping(许建平), and Jin Yan-Yan(金艳艳) Dynamical analysis and experimental verification of valley current controlled buck converter 2010 Chin. Phys. B 19 050509

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