本論文旨在提出一新型疊接式高效率高升壓比轉換器，特點在於藉由耦合電感與疊接架構技術，使其具有高效率及高升壓轉換比之優點。此外，所提電路架構亦具將漏感能量回收且傳送至輸出端之功能，並可降低功率元件應力，以提高整體效率。文中將就本新型疊接式轉換器，說明其動作原理，並分析轉換器在不同匝數比下之效率與電壓增益比，藉此獲得較佳系統參數。最後，研製一輸入電壓24 V；輸出電壓200 V；輸出功率100 W之電路雛型，並以模擬與實驗結果驗證所提疊接式轉換器電路架構之性能。

In this thesis, a novel cascoded high efficiency and high step-up converter is proposed. This converter has the advantages of high efficiency and high conversion ratio by using the coupled-inductor and cascoded technique. Additionally, the energy of leakage inductor can be transferred to the output terminal. Therefore the stress of the power devices can be reduced and the whole efficiency can be increased. The analysis of operating principle of the proposed converter is presented in this thesis. Then, the turn-ratio of the coupled-inductor is discussed for voltage gain and efficiency of the proposed converter. Finally, a prototype circuit with input voltage 24 V, output voltage 200 V and output power 100 W is simulated and implemented to verify the performance of the proposed converter.

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