On the Chaotic Behaviour of Buck Converters

Author

Mehrizi-Sani, A. ; Kinsner, W. ; Filizadeh, S.

Author_Institution

Univ. of Manitoba, Winnipeg

fYear

2007

fDate

22-26 April 2007

Firstpage

1145

Lastpage

1149

Abstract

Power electronic circuits exhibit nonlinear dynamical behaviour due to their inherent inhomogeneity and switching. Among power electronic converters, the DC/DC buck converter is studied with constant-frequency pulse-width modulation feedback control in continuous conduction mode. Phase-space and time-domain plots for several periodic and chaotic orbits are presented. The bifurcation diagram is studied together with periodic orbits and chaotic behaviour of the circuit. Several simulation methods including exact solution and simulation in an EMTP-type program are used and the importance of accurate modeling is justified. Finally, a method for computation of Lyapunov exponents in discontinuous systems is reviewed and implemented.

Keywords

DC-DC power convertors; Lyapunov methods; PWM power convertors; bifurcation; chaos; feedback; nonlinear dynamical systems; power electronics; stability; DC-DC buck converter; EMTP-type program; Lyapunov exponent; bifurcation diagram; chaotic behaviour; nonlinear dynamical behaviour; power electronic circuit; pulse-width modulation feedback control; Buck converters; Chaos; Circuit simulation; Computational modeling; Feedback control; Orbits; Power electronics; Pulse modulation; Pulse width modulation converters; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2007. CCECE 2007. Canadian Conference on

Conference_Location

Vancouver, BC

ISSN

0840-7789

Print_ISBN

1-4244-1020-7

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2007.291

Filename

4232950