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State feedback linearized model for phase-controlled series-parallel resonant converters

Aboushady, A. A. and Ahmed, K. H. and Finney, S. J. and Williams, B. W. (2011) State feedback linearized model for phase-controlled series-parallel resonant converters. In: Proceedings of the 37th Annual Conference on IEEE Industrial Electronics Society (IECON 2011). IEEE, New York, pp. 1590-1595. ISBN 9781612849690

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This paper proposes a linearized large-signal state space model for phase-controlled series-parallel resonant converter. The model combines multiple-frequency and average state-space modeling techniques to generate a universal model with DC state variables that are easier to control compared to the fast resonant tank dynamics. In order to perform linearization, the proposed model utilizes a state feedback scheme from output filter inductor current. The model also serves as a tool for large signal prediction/estimation of converter state variables. The model accuracy was verified by comparing with a detailed switching model of the converter built in MATLAB simulation environment.