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松耦合全橋諧振變換器的傳輸特性研究

摘要：本文對基于非接觸式感應(yīng)電能傳輸技術(shù)的全橋諧振變換器的傳輸特性進(jìn)行了研究。首先，本文以原副邊均采用串聯(lián)補(bǔ)償為例進(jìn)行分析，通過matlab仿真計算，得出了這種情況下補(bǔ)償電容的變化、負(fù)載的變化對原邊諧振頻率和傳輸特性的影響。其次，分析了發(fā)生頻率分叉現(xiàn)象時工作頻率該如何選擇，并利用反映阻抗的概念分析了變換器的功率傳輸能力。最后基于實驗樣機(jī)對文中分析與結(jié)論進(jìn)行了實驗驗證。 敘詞：補(bǔ)償；傳輸特性；諧振頻率；頻率分叉現(xiàn)象 Abstract：In this paper, the transfer characteristic of loosely coupled inductive power transfer full-bridge resonant converter is studied. Firstlywe obtain the conclusion that how the compensation capacitor and load influence on resonant frequency and transfer characteristic, making use of MATLAB, taking the situation that primary and secondary compensation is series for example. Secondly, how to choose the switching frequency when bifurcation phenomena occurs is analyzed, besides, the transfer capability is also analyzed using the conception of reflection impedance. Finally, experimental results from a prototype of full-bridge converter are given, which verify the correctness of analysis and conclusion in the paper. Keyword：compensation; transfer characteristic ; resonant frequency; bifurcation phenomena

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