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Modeling of a Transfer Function for Frequency Controlled Resonant Inverters
한무호,이치환,권우현 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.4
A linear transfer function for the output current control of frequency-controlled resonant inverters is proposed in this paper. The circuit of resonant inverters can be transformed into two coupled circuits through the complex phasor transform. The circuits consist of cross-coupled power sources and passive elements. The circuits are used to induce the state space equation, which is transformed into the 4th order cross-coupled transfer function. The 4th order cross-coupled transfer function is modeled into a 2nd order linear transfer function based on a behavior analysis of the pole and zero locations that facilitate a simple and intuitive linear transfer function. The feasibility and validity of the proposed linear transfer function were verified by simulation and experiment.