為延長電子電路的壽命，本論文以升壓轉換器為基礎架構，利用功率解耦合
技術，提出一無輸出大電解電容之高功因交流/直流轉換電路電路。電路中加入電
感作為能量調節槽，控制兩個主動功率開關，令其在交流輸入電源高壓處儲能，
低壓處釋能，使輸入電流為正弦波，同時達到功率因數修正(Power Factor
Correction, PFC)與輸出穩壓的功能。
本文詳細分析電路運作，推導各開關導通率及電感設計方程式，透過電腦模
擬驗證理論分析與可行性，並據以設計一個交流輸入電壓在90 V 至130 V 間，直
流輸出電壓225 V，功率為157 W 之雛型電路。實際製作之電路以微處理器控制開
關導通率，實現控制技術。實驗結果顯示，本文提出之PFC 架構之輸出濾波電路
採用金屬薄膜電容，在設定之操作範圍內，且輸出電壓之漣波因數(Ripple Factor)
低於18.83%時，功率因數可達0.99，總諧波失真率(Total Harmonic Distortion, THD)
小於12%。

A novel power-factor-correction (PFC) circuit based on boost conversion with
power decoupling is proposed to prolong the lifetime of electronic circuits by excluding
the electrolytic capacitor. An inductor with two active power switches is used as an
energy regulating tank for storing the energy from the ac input at the higher voltages
and releasing it at the lower voltages to accomplish the functions of PFC and voltage
regulation.
Theoretical analyses and computer simulations of the proposed PFC circuit are
made to derive the design equations for the inductor and duty-ratios of the active power
switches. A laboratory circuit is designed for the output ratings of 157 W and 225 V at
an input voltage range from 90 V to 130 V. The power decoupling algorithm for
controlling the duty-ratios of the active power switches is realized by a microcontroller.
Experimental results demonstrate that the PFC circuit with a metalized film capacitor as
the output filter can achieve an input power factor higher than 0.99 and a total harmonic
distortion (THD) less than12% at the designated operating range with a ripple factor of
18.83%

論文審定書 ....................................................................................................................... i
誌謝 ................................................................................................................................. ii
摘要 ................................................................................................................................ iii
Abstract ............................................................................................................................ iv
目錄 ................................................................................................................................. v
圖目錄 ............................................................................................................................ vii
表目錄 ............................................................................................................................. ix
第一章 緒論 .................................................................................................................. 1
1-1 研究背景與動機 .............................................................................................. 1
1-2 論文大綱 .......................................................................................................... 2
第二章 功率因數修正技術 .......................................................................................... 3
2-1 功率因數與總諧波失真 .................................................................................. 3
2-2 PFC 電路簡介 .................................................................................................. 5
2-3 主動式PFC 控制策略簡介 ............................................................................. 6
第三章 電路架構與分析 ............................................................................................ 12
3-1 電路架構 ........................................................................................................ 12
3-2 工作模式 ........................................................................................................ 13
3-3 導通率計算 .................................................................................................... 20
3-3-1 儲能階段 .............................................................................................. 20
3-3-2 釋能階段 .............................................................................................. 22
3-4 電感設計 ........................................................................................................ 25
3-5 控制策略 ........................................................................................................ 29
vi
3-6 控制與偵測電路 ............................................................................................ 29
第四章 實例驗證 ........................................................................................................ 33
4-1 電路規格與參數 ............................................................................................ 33
4-2 電腦模擬 ........................................................................................................ 34
4-3 電路波形量測 ................................................................................................ 36
第五章 結論與未來研究方向 .................................................................................... 41
5-1 結論 ................................................................................................................ 41
5-2 未來研究方向 ................................................................................................ 42
參考文獻 ........................................................................................................................ 43

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