Nonlinear Phenomena in Power Electronic: Chaotic Behavior of Buck Converters
نویسندگان
چکیده
Power electronic is rich in nonlinear dynamic. Its operation is characterized by cyclic switching of circuit topologies, which gives rise to different nonlinear behaviors. Among power electronic converters, DC/DC buck converters have been studied with constant-frequency pulse-width modulation feedback control in continuous conduction mode. Time-domain and phase-space plots for several periodic and chaotic orbits are presented. Bifurcation diagram is studied together with periodic orbits and chaotic behavior of the circuit. Two simulation methods including exact solution and EMTP simulation are used and the importance of accurate modeling is justified. Also a method for computation of Lyapunov exponents in discontinuous systems is reviewed and implemented.
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