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Abdelali El Aroudi, Enric Rodriguez, Mohamed Orabi and Eduard Alarcón Modeling of switching frequency instabilities in buck-based DC–AC H-bridge inverters International Journal of Circuit Theory and Applications 39

Article first published online: 18 JAN 2010 | DOI: 10.1002/cta.627

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In this paper, the dynamical behavior of a full bridge DC-AC buck inverter controlled by fixed frequency and PWM is studied. After showing that the system can undergo both period-doubling and Neimark-Sacker bifurcation at the fast scale (switching period) by using the exact switching model, an exact solution discrete-time model able to predict both instability phenomena is derived. The model is obtained without making the quasi-static approximation and it can be used to obtain the useful operation region in the multidimensional design parameter space from time domain simulations in a very fast and accurate manner. Based on the study of the system, some design guidelines are provided. Copyright © 2010 John Wiley & Sons, Ltd.

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