A unified equivalent circuit analysis of quasi resonant converters: high frequency network averaging

An approach of High Frequency Network Averaging (HFNA) is presented for analysis of Quasi Resonant Converters (QRC's). The elements whose currents (or terminal voltages) vary very fast are replaced by dependent sources controlled by low-frequency variables and nonlinear structure-invariant equivalent circuits of QRC's can be obtained. This new approach and its resulting models are circuit-oriented and helpful to the analysis and design of QRC's.<
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