本論文提出一新型具耦合電感之高升壓比電流饋入型轉換器，此轉換器除了具有架構簡單及轉換效率高等優點外，輸出電壓採用電容疊接技術，因此能降低各功率元件耐壓；此外，此架構為電流饋入型，因此能減少輸入電流漣波。透過雙電容同時充電和串聯放電可達到高升壓比之目的，使開關導通率操控於0.5以上即可得到16倍以上之升壓比。此架構最高轉換效率達96.06%，且於輕載至滿載情況下，轉換效率均可達95%以上。本論文首先介紹不同類型之高升壓轉換器，其次分析本文電路之動作模式，並設計主電路功率元件參數。最後本文研製一輸入電壓24 V，輸出電壓為400 V，輸出功率200 W之新型高升壓轉換器，並由實驗結果驗證理論分析之可行性。

In this thesis, a novel high step-up current-fed DC-DC converter with coupled inductor has been proposed. This converter has advantages of simple structure and high efficiency. In addition, output-voltage stacking technique has been adopted, so that the voltage stress on each power device can be reduced. Besides, the converter is a current-fed type which can reduce input current ripple. By the means that two capacitors have been charged simultaneously and been discharged in series, it can achieve the purpose of high voltage conversion ratio. The converter can get high voltage ratio about 16 times by operating duty cycle above 0.5. The highest conversion efficiency of the proposed converter is 96.06%. Moreover, the conversion efficiencies are above 95% from light load to full load. First, different types of high step-up converters are introduced. Second, the analysis of operating principle of the proposed converter is performed. Then, design the power devices’ parameters of the main circuit. Finally, a prototype circuit with 24 V input voltage, 400 V output voltage and 200 W output power is implemented to verify the performance of the proposed converter.

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