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Analysis of 4th-order LCLC resonant power converters

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6 Author(s)
Y. A. Ang ; Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK ; M. P. Foster ; C. M. Bingham ; D. A. Stone
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A methodology is presented for the high-speed, steady state analysis of 4th-order LCLC resonant power converters. Both current-output and voltage-output variants are considered. State-variable dynamic descriptions of the circuits are derived and subsequently employed to rapidly determine the steady-state cyclic behaviour and the voltage and current characteristics of the resonant-tank and output-filter, and to estimate the voltage and current stresses on resonant components. Simulated and experimental results for two prototype 4th-order converters (inductive and capacitive output variants) confirm that the accuracy of the model is comparable with SPICE simulations, while requiring less than 10-4 of the computational time.

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IEE Proceedings - Electric Power Applications  (Volume:151 ,  Issue: 2 )