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研究生：	侯銘凱 Hou, Ming-Kai
論文名稱：	低頻主動式功率因數修正電路之設計與實現 Design and Implementation of Low Frequency Active Power Factor Correction Circuits
指導教授：	鄭銘揚 Cheng, Ming-Yang
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電機工程學系 Department of Electrical Engineering
論文出版年：	2008
畢業學年度：	96
語文別：	中文
論文頁數：	87
中文關鍵詞：	總諧波失真、梯形波近似電流、導通參數、功率因數修正
外文關鍵詞：	trapezoid current waveform, conduction parameters, total harmonic distortion, power factor correction
相關次數：	點閱：86 下載：5
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本論文主要著重在低頻主動式功因修正電路的分析與設計。近年來可以發現低頻主動式功因修正電路和高頻主動式功因修正電路相較起來，具有低電磁干擾和低切換損失等優點，且功因修正的性能比起被動式功因修正電路要優良許多。然而就現有的文獻而言，關於低頻主動式功因修正電路之主要的控制參數要如何選擇，及所設計出來的電路其功因修正之性能，卻是有限的。因此本論文在此提出一種利用梯形波近似電流的設計方法；此方法在電路的主要控制參數，亦即開關的導通時間點和導通多久決定之後，即可對電路的總諧波失真和功因做一大致的估測。另外針對電感值的選擇和開關導通參數之間的關係，已詳細推導並研究；設計者可以根據不同應用場合的需求進而選擇適當的導通參數和電感值。藉由理論上的分析，電腦模擬和實驗結果都可驗證本論文所提出方法的有效性。使用本論文所提出的設計方法，設計者可以在選擇電感值和控制參數上節省相當多的時間。

This thesis focuses on the analysis and design of low frequency active power factor correction circuits (LFAPFC). It has been recently reported that LFAPFC has attractive features such as low EMI and low switching loss when compared with high frequency active power factor correction circuits (HFAPFC). Moreover, its performance is better than that of passive power factor correction circuits (PPFC). However, studies on the major control parameters of LFAPFC and their corresponding performance are limited. This thesis proposes a design method that is based on a trapezoid current waveform. Using the proposed method, the output performance such as total harmonics distortion (THD) and power factor (PF) of LFAPFC can be approximately estimated when the major control parameters, i.e., the conduction timing and conduction period of the power switch are determined. In addition, the relationship between the value of the inductor and the conduction parameters of the power switch is derived and investigated. Designers can determine suitable values of conduction parameters and inductors for specific applications. Theoretical analysis, computer simulation, and experimental results demonstrate the effectiveness of the proposed method. Using the proposed method, designers can save considerable time choosing the value of control parameters and inductors.

中文摘要.....................................................................................................I
英文摘要.....................................................................................................II
誌謝............................................................................................................IV
目錄.............................................................................................................V
表目錄.....................................................................................................VIII
圖目錄.......................................................................................................IX

第一章 緒論................................................................................................1
1 研究背景...............................................................................................1
2 文獻回顧...............................................................................................3
3 研究目的與方法...................................................................................4
4 論文架構...............................................................................................5

第二章 功率因數修正電路之工作原理及分類........................................6
1 簡介.......................................................................................................6
2 功率因數的定義...................................................................................7
3 傳統橋式整流濾波電路.......................................................................8
4 被動式功因修正電路之工作原理.......................................................9
5 高頻主動式功因修正電路之工作原理.............................................12
5.1 乘法器控制法(Multiplier approach control).....................................13
5.2 非線性載波控制(Nonlinear carrier control).....................................18
5.3 單一週期控制(One-cycle control)...................................................18
5.4 電壓隨耦法(Voltage follower approach)..........................................19
6 低頻主動式功因修正電路之工作原理.............................................21
6.1 基於探討功因修正效果的設計方法..............................................21
6.2 基於探討降低電感體積的設計方法..............................................23
7 各功因修正方法的比較.....................................................................26

第三章 利用輸入電流的低頻主動式功因修正電路之設計..................28
1 前言.....................................................................................................28
2 利用輸入電流的設計方法.................................................................29
2.1 理論分析..........................................................................................29
2.2 電感的選擇......................................................................................31
2.3 輸出電壓..........................................................................................32
2.4 功率因數與開關切換策略..............................................................32
3 討論.....................................................................................................34

第四章 以梯形波近似電流分析輸入電流的低頻主動式功因修正電
              路之設計............................................................................................35
1 低頻主動式功因修正電路之電流波形探討.....................................35
2 以梯形波近似輸入電流波形之設計方法.........................................37
2.1 利用梯形波近似電流波形求輸入功率..........................................39
2.2 不同切換策略下所需的電感值......................................................41
2.3 梯形波近似電流和輸入電流的總諧波失真比較..........................43
2.4 電感選擇的影響和開關切換策略的決定......................................50
3 討論.....................................................................................................61

第五章 實驗架構與實驗結果..................................................................62
1 前言.....................................................................................................62
2 硬體電路.............................................................................................62
2.1 相位控制電路..................................................................................63
2.2 MOSFET閘極驅動電路...................................................................65
2.3 輸出濾波電容..................................................................................65
2.4 功率元件與電子式負載..................................................................66
3 實驗結果.............................................................................................67
3.1 實驗一：在相同Td和Ton下，探討負載變動對電流波形的影
       響...........................................................................................................67
3.2 實驗二：針對不同電感值求取最佳切換策略的功因修正效
       果...........................................................................................................73
4 實驗結果討論.....................................................................................79

第六章 結論與未來研究建議..................................................................80
1 結論.....................................................................................................80
2 未來研究建議.....................................................................................80

參考文獻...................................................................................................82
附錄...........................................................................................................85
自述...........................................................................................................87
                                    

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