本論文針對高功因交流對直流轉換器，將升壓式及降升壓式功因修正電路與隔離型半橋諧振轉換器的主動功率開關整合，實現兩種具高功因、高效率及低成本的新型單級對稱結構的高功因零電壓切換之交流對直流諧振轉換器。
本文應用基本波分析法與簡化之變壓器等效模型，建立負載等效電路，推導參數設計方程式與流程，並透過電腦模擬，分析電路的工作模式與原理。升壓式及降升壓式功因修正電路工作於不連續導通模式，以達成高功因；半橋諧振轉換器的諧振迴路工作於電感性負載，使所有主動功率開關皆可零電壓切換導通。最後經由電路實際製作與實驗量測，證實兩種轉換器均具有高效率，高功因的優點。

The research presents two novel high power factor ac-to-dc resonant converters with symmetrical topologies and zero-voltage-switching (ZVS) operation. The derived circuits are obtained from the integration of a dual-switch boost-type or buck-boost-type power factor corrector (PFC) into a half-bridge resonant converter. With symmetrical topology, the circuit is simple and the voltage and current stresses on the two active power switches are identical to each other.
The PFC is operated at discontinuous conduction mode (DCM) to achieve unity power factor. The resonant energy tank of half-bridge resonant converter is designed to be inductive to retain ZVS operation. The design equations are derived based on fundamental approximation. Prototypes of the two proposed converters designed for 100 W and 50 W, respectively, were built and tested to verify the computer simulations and analytical predictions. Satisfactory results are obtained experimentally.

中文摘要 I
英文摘要 II
目錄 III
圖表目錄 V
第一章 簡介 1
1-1 研究動機 1
1-2 論文大綱 3
第二章 交流對直流轉換器 4
2-1 雙級高功因交流對直流轉換器 4
2-1-1功因修正電路 5
2-1-2直流對直流轉換器 6
2-2 單級高功因交流對直流轉換器 8
第三章 升壓式高功因零電壓切換之交流對直流諧振轉換器 10
3-1 電路架構整合 10
3-2 工作原理 12
3-2-1 電路工作模式 12
3-2-2 工作模式綜合討論 17
3-3 電路分析 18
3-3-1 雙開關升壓式功因修正電路 18
3-3-2 隔離型半橋諧振轉換器 21
3-4 參數設計 25
3-5 電腦模擬 27
3-6 實驗量測 29
第四章 降升壓式高功因零電壓切換之交流對直流諧振轉換器 32
4-1電路架構整合 32
4-2 工作原理 33
4-2-1 電路工作模式 34
4-2-2 工作模式綜合討論 39
4-3 電路分析 40
4-3-1 對偶式降升壓功因修正電路 40
4-3-2 隔離型半橋諧振轉換器 43
4-4 參數設計 44
4-5 電腦模擬 46
4-6 實驗量測 48
第五章 結論與未來研究方向 51
5-1 結論 51
5-2 未來研究方向 52
參考文獻 54

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