本論文提出具漏感能量回收之新型錯相返馳式轉換器，此電路結合雙開關雙變壓器之返馳式轉換器，再利用箝位二極體回收變壓器漏感上之能量，將切換開關之電壓箝位在輸入電壓以降低切換開關之耐壓。此外，開關之控制訊號以錯相方式控制可降低輸出漣波電流，並可提高輸出功率。另外，電路具有較高的降壓比，可減少一次側變壓器匝數，因此可提升電路的轉換效率。本論文首先分析所提之錯相返馳式轉換器電路的動作原理，並推導此電路之穩態特性。最後實作一輸入電壓為400V，輸出為24V/300W之轉換器。實驗量測結果分析最高效率可達94.42%，滿載效率為92.7% ，10%載效率可達92.61%。

In this thesis, a novel interleaved flyback converter with leakage energy recycled is proposed. The proposed converter is combined with dual-switch dual-transformer flyback topology. Two clamping diodes are used to reduce the voltage stress on power switches to the input voltage level and also to recycle leakage inductance energy to the input voltage and capacitor. Besides, the interleaved control is implemented to reduce the output current ripple. In addition, the voltage on the primary windings is reduced to the half of the input voltage and thus reducing the turns ratio of transformers to improve efficiency. The operating principle and the steady state analysis of the proposed converter are discussed in detail. Finally, an experimental prototype is implemented with 400V input voltage, 24V/300W output to verify the feasibility of the proposed converter. The experimental results reveals that the highest efficiency of the proposed converter is 94.42%, the full load efficiency is 92.7%, and the 10% load efficiency is 92.61%.

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