近年來，如風力、太陽能和燃料電池等潔淨能源已經被積極研究且發展出各種再生能源發電系統。其中，燃料電池有高能量密度、大電流輸出能力、潔淨發電以及高效率操作的優點，然而由於在各種不同負載、溫溼度和電化學反應條件下，燃料電池係低壓輸出且會有相當大的輸出電壓範圍變化特性，為了提供負載穩定電壓源，因此必須在燃料電池與負載之間加入升壓型直流/直流轉換器。
本論文選用的架構為電流饋入式全橋直流/直流轉換器轉換器，在二次側使用倍壓電路。而在轉換器輸出端並聯一高壓磷酸鐵鋰電池，為了避免過電壓及過電流所影響電池使用壽命及確保系統的穩定，在回授端設計了兩種回授方式分別為定電壓和定電流。最後本論文設計和測試3kW電路驗證其可行性，效率可高於0.9。

Recently, clean energy resources such as wind turbines, photovoltaic arrays or fuel cells have been exploited for developing renewable electric power generation systems. In which, the fuel cells have numerous advantages such as high current output ability, high energy density, clean electricity generation and high efficiency operation. However, the fuel cell stacks present low voltage output and wide range of voltage variations under different load, temperature, humidity and electrochemical reaction conditions. In order to provide load a constant high voltage DC bus, a step-up DC/DC converter must be added between the fuel cell stack and the load.
In this thesis, a current-fed full-bridge DC/DC converter with secondary voltage-doubler rectification is studied. A high-voltage LiFePO4 battery is used as the load in experiments. The over-voltage protection (OVP) and over-current protection (OCP) functions are realized to prevent degradation of battery characteristics and ensure system reliability. A dual-mode control with constant voltage (CV) and constant current (CC) is also implemented in system feedback loop. A 3kW laboratory prototype is designed and tested to verify the feasibility of the studied system. The measured conversion efficiency can be above 0.9.

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