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研究生： 江欣瑋
Chiang, Hsin-Wei
論文名稱： 具正電壓輸出之無橋式Cuk功率因數修正器研製
Implementation of Bridgeless Cuk Power Factor Corrector with Positive Output Voltage
指導教授： 楊宏澤
Yang, Hong-Tzer
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： 2013
畢業學年度： 101
語文別： 英文
論文頁數： 81
中文關鍵詞： 無橋式整流器 、邱克轉換器 、功率因數修正器 、輸出正電壓 、總諧波失真
外文關鍵詞： Bridgeless Rectifier, Cuk Converter, Power Factor Correction, Positive Output Voltage, Total Harmonic Distortion (THD)
相關次數： 點閱：74  下載：2 
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    • 　　本論文提出一單相具有正電壓輸出之無橋邱克交流/直流功率因數整流器。該整流器被設計為高輸入電壓轉換低輸出電壓，可應用於低壓的電子產品。
    　　由於該整流器不需經由橋式二極體整流，因此所提出整流器可以降低輸入端二極體導通損，進而提升系統整體效率。本文提出的架構操作在不連續導通模式，則不需要電流迴路，並且使用單開關控制該電路，因此，可減少控制電路的複雜性。本文也提出了不需要任何外加的電壓反相電路，即可將邱克電路輸出負電壓轉換成正電壓的方法，俾減少整體電路元件數量及成本。
    　　本文詳細的描述所提電路操作原理、穩態分析及設計流程，最後模擬與實作一輸入電壓90 Vrms-130 Vrms (60 Hz)，輸出電壓48 Vdc，額定負載150 W之雛形電路，以驗證本論文所提出電路架構之可行性。

    　　This thesis proposes a single-phase, bridgeless Cuk AC/DC power factor correction (PFC) rectifier with positive output voltage. For low output voltage product applications, the rectifier is designed to convert high input voltage to low output voltage.
    　　Due to no bridge diodes required and thus decreased input conduction losses, the proposed rectifier efficiency can be improved. The proposed rectifier operates in discontinuous conduction mode (DCM) and the current-loop circuit is hence not needed. Also, only a single switch is used in the rectifier to simplify the control circuit design. A translation method to have the positive output voltage in the Cuk converter is presented in the rectifier to reduce the component counts and cost as well.
    　　The operational principles, steady-state analysis, and design procedure of the proposed rectifier are addressed in detail in the thesis. Simulation and experimental results obtained from a 150 W-rated prototype circuit with input 90 Vrms -130 Vrms (60 Hz) and output 48 Vdc have verified the validity of the proposed rectifier.

    CONTENTS CHINESE ABSTRACT I ABSTRACT II CHINESE ACKNOWLEDGEMENT III LIST OF TABLES VIII LIST OF FIGURES IX CHAPTER 1. INTRODUCTION 1 1.1. Backgrounds andMotivations 1 1.2. Literature Review 5 1.3. Research Method and Objectives 7 1.4. Organization of the Thesis 8 CHAPTER 2. REVIEW AND PRICINPLE OF BRIDGELESS RECTIFIER 9 2.1. Introduction 9 2.2. Fundamentals of Power Factor Correction 9 2.3. Review of the Single Phase PFC converter 14 2.4. Control Strategies of the Single-Phase PFC Converter 16 2.4.1. Average Current-mode Control [26] 17 2.4.2. Peak Current-mode Control [27] 18 2.4.3. Hysteresis Current-mode Control [28] 19 2.4.4. Voltage Follower [29] 20 2.5. Characteristic of the SEPIC and Cuk rectifier topology in DCM 24 2.6. Introduction of the Bridgeless PFC rectifier 24 2.6.1. Basic Bridgeless Architecture 25　 2.6.2. Two-Phase Architecture 27 2.7. Existing Bridgeless Cuk Power Factor Correction Rectifier 28 2.8. Summary 30 CHAPTER 3. THE PROPOSED BRIDGLESS CUK PFC 31 3.1. Introduction 31 3.2. The Proposed Cuk PFC Rectifier 32 3.3. Analysis and Design of the Proposed Cuk Power Factor Correction Rectifier 40 3.3.1. Input Inductors Design 40 3.3.2. Voltage Conversion Ratio M 40 3.3.3. Boundaries Between CCM and DCM 42 3.3.4. Input Capacitors Selection 43 3.3.5. Output Capacitor Design 44 3.4. Analysis and Control of the Proposed Rectifier 44 3.4.1. Control of the Proposed Rectifier 47 3.4.2. Proportional-Integral Controller Design 48 3.5. Summary 51 CHAPTER 4. SIMULATION AND EXPERIMENTAL RESULTS 52 4.1. Specifications of the Proposed Prototype Circuit 52 4.2. Experimental verification 55 4.2.1. Introduction of the Voltage Mode 55 4.2.2. PWM IC UC 3525 (Voltage Mode) 56 4.2.3. Switch Driver Circuit 58 4.2.4. Simulation and Experimental Results 59 4.2.5. Power Factor of the Proposed bridgeless Rectifier 72 4.2.6. Efficiency of the Proposed bridgeless Rectifier 73 4.2.7. Component counts comparison of the proposed and existing reference topology 75 4.3. Summary 76 CHAPTER 5. CONCLUSIONS 77 5.1. Summary 77 5.2. Future works 78 REFERENCES 79

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