Bifurcation and Chaotic Aspects in Peak Current Controlled Buck-Boost Converters

Abstract:- The paper investigates the bifurcation and chaotic behavior of a current-mode controlled Buck-Boost converter operating in continuous conduction mode (CCM). The analysis comprehends both open loop and proportional closed loop operation cases. Classical averaged dynamic models cannot predict the chaotic converters behavior which leads to typical phenomenology like period-doubling, quasiperiodic and chaotic operation. The most important dynamic behavior aspects are revealed by simulation, together with a rigorous mathematical description that exactly predicts the converters operation modes. Key-Words:- Non-Linear dynamics, bifurcation, chaos, subharmonic oscillation, dc-dc converters, buck-boost converter, current-mode control, power electronic