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Cyclic-averaging for high-speed analysis of resonant converters

By M P Foster, H I Sewell, Chris Bingham, D A Stone, D Hente and D Howe


Abstract—The paper describes the development and application\ud of a cyclic-averaging technique for the rapid analysis of\ud high-order resonant power converters. To provide a focus to the paper, particular emphasis is given to a 3rd-order LCC voltage output converter topology. The proposed methodology predicts steady-state voltages and currents throughout the circuit, and provides estimates of the stresses on the resonant circuit components. State-space simulations and experimental results from a 350 V-input/150 V-output converter are used to demonstrate a prediction accuracy comparable with time-domain integration-based\ud techniques is achievable, while requiring only 1/10,000th of the computation time. In addition, a comparison with Spice simulation results shows that cyclic averaging provides commensurate predictions of voltage and current stresses on the resonant circuit components. Issues arising from the stray capacitance associated with the resonant inductor, and the corresponding sensitivity of the predicted output voltage, are also considered

Topics: H610 Electronic Engineering
Publisher: Institution of Electronic and Electrical Engineers POWER ELECTRONICS SOCIETY
Year: 2003
DOI identifier: 10.1109/TPEL.2003.813763
OAI identifier:

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