Zero Average Surface Controlled Boost-Flyback Converter

Juan-Guillermo Muñoz, Fabiola Angulo and David Angulo-Garcia
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Juan-Guillermo Muñoz: Instituto Tecnológico Metropolitano, Calle 54A # 30-01, Barrio Boston, Medellín 050013, Colombia
Fabiola Angulo: Departamento de Ingeniería Eléctrica, Electrónica y Computación-Bloque Q, Facultad de Ingeniería y Arquitectura, Campus La Nubia, Universidad Nacional de Colombia-Sede Manizales, Manizales 170003, Colombia
David Angulo-Garcia: Grupo de Modelado Computacional-Dinámica y Complejidad de Sistemas, Instituto de Matemáticas Aplicadas, Universidad de Cartagena, Carrera 6 # 36-100, Cartagena de Indias 130001, Colombia

Energies, 2020, vol. 14, issue 1, 1-18

Abstract: The boost-flyback converter is a DC-DC step-up power converter with a wide range of technological applications. In this paper, we analyze the boost-flyback dynamics when controlled via a modified Zero-Average-Dynamics control technique, hereby named Zero-Average-Surface (ZAS). While using the ZAS strategy, it is possible to calculate the duty cycle at each PWM cycle that guarantees a desired stable period-1 solution, by forcing the system to evolve in such way that a function that is constructed with strategical combination of the states over the PWM period has a zero average. We show, by means of bifurcation diagrams, that the period-1 orbit coexists with a stable period-2 orbit with a saturated duty cycle. While using linear stability analysis, we demonstrate that the period-1 orbit is stable over a wide range of parameters and it loses stability at high gains and low loads via a period doubling bifurcation. Finally, we show that, under the right choice of parameters, the period-1 orbit controller with ZAS strategy satisfactorily rejects a wide range of disturbances.

Keywords: boost-flyback converter; Zero Average Dynamics control; Zero Average Surface control; bifurcation diagram; Floquet multipliers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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