Modeling of switching frequency instabilities in buck-based DC-AC H-bridge inverters

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Title:	Modeling of switching frequency instabilities in buck-based DC-AC H-bridge inverters
Author:	El Aroudi, Abdelali; Rodríguez Vilamitjana, Enric; Orabi, Mohamed; Alarcón Cot, Eduardo José
Other authors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits
Abstract:	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 multi-dimensional 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.
Abstract:	Peer Reviewed
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria electrònica::Microelectrònica::Circuits integrats -DC-AC converters -DC-AC H-bridge inverters -Convertidors de corrent elèctric
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Document type:	Article - Published version Article
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