本論文提出一新型錯相返馳式轉換器架構，此電路結合雙開關返馳式轉換器與傳統錯相返馳式轉換器之優點，以提高輸出功率與轉換效率。本架構係利用二個電容器串接，且分別並聯一組基本返馳式轉換器，於電路中加入箝位二極體可直接回收漏電感能量，並箝位切換開關之電壓，藉以提高轉換器效率。本文中將對常見之返馳式電路架構作簡介，並針對所提出之電路架構作特性分析。最後，研製一雙級式電源轉換器，藉以驗證理論分析之正確性。本電源轉換器之輸入交流電壓為90V ~ 264 V，輸出為直流電壓24 V，輸出功率為480 W。

In this thesis, a novel interleaved flyback converter combines the advantages of the two-switch flyback converter and the interleaved controlled technique. Thus, the output power can be increased and also the system efficiency is improved. There are two series capacitors in the front of input, and each capacitor is parallel with a basic flyback converter. Additionally, clamp diodes are employed to clamp the voltage stress on switches, and also recycle the energy stored in leakage inductors through clamp diodes. Several flyback topologies are introduced, and characteristic analysis of the proposed converter is discussed. Finally, a two-stage power converter is implemented to verify the theory, the specifications of the two-stage power converter are as follows: The input voltage is from 90 VAC to 264 VAC, the output voltage is 24 V and the output power is 480 W.

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