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Transition from periodicity to chaos in a PWM-controlled buck converter with ZAD strategy
Angulo García, Fabiola; Fossas Colet, Enric; Olivar, Gerard
Universitat Politècnica de Catalunya. Institut d'Organització i Control de Sistemes Industrials; Universitat Politècnica de Catalunya. ACES - Control Avançat de Sistemes d'Energia
The transition from periodicity to chaos in a DC-DC Buck power converter is studied in this paper. The converter is controlled through a direct Pulse Width Modulation (PWM) in order to regulate the error dynamics at zero. Results show robustness with low output error and a fixed switching frequency. Furthermore, some rich dynamics appear as the constant associated with the first order error dynamics decreases. Finally, a transition from periodicity to chaos is observed. This paper describes this transition and the bifurcations in the converter. Chaos appears in the system with a stretching and folding mechanism. It can be observed in the one-dimensional Poincaré map of the inductor current. This Poincaré map converges to a tent map with the variation of the system parameter ks.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica::Automàtica i control
Electric current converters
DC-DC Buck power converter
Pulse Width Modulation (PWM)
Convertidors DC-DC
Modulació de l'amplada del pols
Modulación por ancho de pulsos
Convertidores DC-DC
Convertidors de corrent elèctric
Classificació INSPEC::Convertors::Power convertors::DC-DC power convertors
World Scientific Publishing

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