本論文旨在分析單級隔離型電流饋入全橋式功率因數修正器，適於大功率轉換應用。控制策略採用類比IC UC3854BN係用於功率因數修正相當普遍的市售IC，將UC3854BN控制信號擷取出來，輸入複雜可程式邏輯裝置，產生出具有交疊時間的控制信號來完成全橋功率因數修正器。本文實現一種，高效率、高功率因數、電路簡單的高功率轉換器。而詳細的操作原理與設計流程，在本文會有進一步的分析與論述。最後本文於實驗室實現一組1.2kW電路，而實驗結果顯示此電路具有高效能、高功率隔離型功率因數修正能力。

This thesis aims to study a single-stage isolated current-fed full-bridge power factor correction (PFC) converter for high power applications. A commercial PFC control IC UC3854BN is combined with an external Complex Programmable Logic Device (CPLD) circuit to realize the gating signals with overlapping-time design for the studied current-fed full-bridge converter. High efficiency, high power factor and simple circuit topology can be achieved by the proposed high-power converter. The operating principles and design criteria are analyzed and discussed in details. A 1.2kW laboratory prototype was implemented and tested. The experimental results are shown to verify the feasibility of the proposed high-performance high-power isolated PFC converter.

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