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Self-oscillating control methods for the LCC current-output resonant converter

By A J Gilbert, Chris Bingham, D A Stone and M P Foster


Abstract—A strategy for self-oscillating control of LCC current-output resonant converters, is presented, based on varying the phase-angle between the fundamental of the input voltage and current. Unlike other commonly employed control methodologies,the proposed technique is shown to provide a convenient, linear system input-output characteristic suitable for the design of regulators.\ud The method is shown to have a similar effect as controlling\ud the dc-link supply voltage, in terms of output-voltage/current control. The LCC converter variant is used as an application focus for demonstrating the presented techniques, with simulation and experimental measurements from a prototype converter being used to show the practical benefits. Third-order small and large-signal models are developed, and employed in the formulation of robust output-voltage and output-current control schemes.\ud However, notably, the presented techniques are ultimately generic and readily applicable to other resonant converter variants

Topics: H600 Electronic and Electrical Engineering
Publisher: IEEE Power Electronics Society
Year: 2008
DOI identifier: 10.1109/TPEL.2008.925198
OAI identifier: oai:eprints.lincoln.ac.uk:2308

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