本論文研製一具激磁能量回收之錯相順向式電源轉換器，此電路結合雙變壓器之順向式轉換器，電路架構具有較高降壓比可減少變壓器匝數以提高變壓器效率，再利用雙開關之錯相式操作將能量傳遞至輸出端，可進一步減少輸出電流之漣波，進而降低輸出漣波電壓。另外，於開關截止時，利用箝位二極體將變壓器的激磁能量回收至電容及輸入端，進而提升轉換器效率。本文首先簡介一般常見之順向式電源轉換器，再針對所使用之架構做操作模式分析，最後實作一輸入電壓為400V，輸出為24V/480W之轉換器以驗證電路特性。最後，實測於80%負載時可達最高效率94.57%，滿載效率達94.46%。

In this thesis, an interleaved forward converter with magnetizing energy recycled is implemented. The interleaved forward converter used for hardware implementation is mainly constructed by two transformers and two interleaved controlled power switches to reduce the output current ripple. The voltage stress on the primary windings is reduced to the half of the input voltage. Two additional voltage clamping diodes are used for recycling the transformer magnetizing energy to improve the system efficiency. The conventional forward converters are reviewed first and then the detail operating principles of the interleaved forward converter are analyzed in detail. Finally, an experimental prototype is implemented with 400V input voltage 24 V/480 W output to verify the feasibility of the interleaved forward converter. The experimental results reveal that the maximum efficiency is 94.57% at 80% load and the full load efficiency is 94.46%.

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