本論文提出一新式雙電壓迴路調節脈寬調變控制單級雙開關順向型交-直流轉換器。本文首先探討各種具功因修正之單級交-直流轉換電路，並闡述各單級化技術及其優缺點。接續，針對本文所提之控制策略加以說明，分析電路操作模式並設計一實際控制電路，此控制電路具簡單實用之特點。最後實作一雛型電路，印證本文所提之控制策略可行性。實作結果，本文提出之雙電壓迴路調節脈寬調變控制於泛用輸入電壓下，可有效達到功率因數修正之目的，並穩定其直流鏈電壓與輸出電壓皆能達到穩定調節之效果，本¬雛型電路之最高效率約85%。

This thesis proposes a novel two-loop voltage regulation control, applied to single-stage two-switch forward AC-DC converter. First, this thesis introduce a kind of Single-stage AC-DC converter with PFC and feature of them. Then explains proposed control strategy, and operating principle. This control strategy is simple and functional. Eventually, a prototype circuit is implemented to verify the feasibility of proposed control strategy. Experimental results show high power factor with universal line input, output voltage and bus voltage regulation can be achieved. Maximum efficiency is up to 85%.

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