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研究生： 謝蓓薇
Hsieh, Bei-Wei
論文名稱： 以數位晶片化技術實現具單週期控制之無橋式昇壓型高功因交-直流轉換器
A Digital Approach to Realize One-Cycle Control for Bridgeless High Power Factor Boost AC-DC Converters
指導教授： 張簡樂仁
Chang-Chien, Le-Ren
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： 2012
畢業學年度： 100
語文別： 英文
論文頁數： 104
中文關鍵詞： 單週期控制 、功率因數校正 、無橋式功率因數轉換器 、數位帶拒濾波器
外文關鍵詞： One-cycle control (OCC), Power factor correction (PFC), Bridgeless PFC boost converter, Digital notch filter
相關次數： 點閱：140  下載：16 
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    • 本論文以數位晶片化技術實現具單週期控制之無橋式昇壓型高功因交‐直流轉換器。由於傳統平均電流控制法，演算法複雜且須乘法器電路及檢測輸入線電壓，難以實現於無橋式功率因數轉換器。因此，本論文採用離散時間單週期控制技術，演算法簡單且無須檢測輸入電壓，俾以應用於無橋式昇壓型功率因數交‐直流轉換器。此外，為濾除市電兩倍頻漣波對電壓迴路之影響，本文加入數位帶拒濾波器於電壓迴路，以達到系統最佳輸出電壓暫態特性。本論文首先闡述單週期控制技術之理論基礎，透過分析單週期控制應用於無橋式功率因數轉換器之工作原理，利用電路模擬軟體Matlab/Simulink 建立控制架構之模型，以模擬結果驗證其理論分析及控制策略之可行性。
    最後，實作一1000W 無橋式昇壓型高功因交‐直流轉換器雛型電路，利用FPGA Altera DE2-70 數位晶片實現離散時間單週期控制技術，以進行硬體驗證。實驗結果顯示Discrete-time OCC 技術具有高功率因數及動態響應佳之特性。

    A digital approach to realize one-cycle control (OCC) technique for bridgeless power-factor-correction (PFC) boost AC-DC converter is proposed in this thesis. Because the complex multiplier circuit and the input AC voltage sensing are generally required, the conventional average current-mode control is difficult to be implemented in the bridgeless PFC converter. Therefore, this thesis adopts the other alternative for continuous conduction mode bridgeless PFC converter.
    The discrete-time OCC scheme does not require input AC voltage sensing for the controller reference. The control scheme can operate in peak current mode, which overcomes the complexity of bridgeless high power factor boost AC-DC converters using the conventional average current-mode control. Compared with the conventional OCC, the proposed discrete-time OCC scheme can enhance dynamic responses of the output voltage using a digital notch filter to eliminate the second harmonic component from the output voltage loop.
    This thesis starts with the theoretical analysis of the one-cycle control by illustrating the working principle of the bridgeless PFC boost AC-DC converter. Following that, using the Matlab/Simulink simulation software, the simulated model of the proposed discrete-time OCC scheme is constructed and verified. The simulation results validate the theoretical analysis and the effectiveness of the control strategy.
    Finally, the proposed discrete-time OCC scheme has been implemented using an FPGA Altera DE2-70 to realize a 1000 W prototype of bridgeless PFC boost AC-DC converter. Experimental results show that the proposed discrete-time OCC scheme can achieve both in high PF and fast dynamic response.

    CHINESE ABSTRACT I ENGLISH ABSTRACT II ACKNOWLEDGEMENTS IV CONTENTS V LIST OF TABLES VIII LIST OF FIGURES IX CHAPTER 1 INTRODUCTION 1 1.1 Motivation 1 1.2 Research Goals and Contributions 5 1.3 Thesis Organization 6 CHAPTER 2 BRIDGELESS PFC BOOST AC-DC PFC CONVERTERS 7 2.1 Introduction 7 2.2 Fundamentals of Power Factor Correction 7 2.3 Review of the Single Phase PFC converter 11 2.4 Control Strategies of the Single-Phase PFC Boost Converter 20 2.4.1 Average Current-mode Control 20 2.4.2 Peak Current-mode Control 22 2.4.3 Hysteresis Current-mode Control 23 2.5 Basic Bridgeless PFC Boost AC-DC Converters 25 2.5.1 Review of the Basic Bridgeless PFC Boost Converter 29 2.5.2 Challenges of the Basic Bridgeless PFC Boost Circuit 33 2.5.3 The Proposed two-Phase Bridgeless PFC Boost Converter 37 2.6 Summary 39 CHAPTER 3 ANALYSIS AND DESIGN OF DISCRETE-TIME ONE-CYCLE CONTROLLED BRIDGELESS PFC CONVERTERS 40 3.1 Introduction 40 3.2 Concept of One-Cycle Control 40 3.3 Continuous-time One-Cycle Control 45 3.4 The Proposed Discrete-time OCC scheme 47 3.4.1 Analysis of Discrete-time OCC scheme 48 3.5 Simulation Model of the Proposed Discrete-time OCC 50 3.5.1 Power Stage 51 3.5.2 Digital Notch Filter Design 54 3.5.3 Digital Voltage Compensator Design 57 3.6 Summary 59 CHAPTER 4 HARDWARE AND SOFTWARE IMPLEMENTATION OF DISCRETE-TIME ONE-CYCLE CONTROLLED BRIDGELESS PFC CONVERTERS 60 4.1 Introduction 60 4.2 Implementation of the Hardware 60 4.2.1 Power Stage Circuit 62 4.2.2 Interface Circuit of the FPGA 65 4.2.3 Analog-to-Digital Converter Circuit 66 4.2.4 Voltage Sensor and Current Sensor Circuit 67 4.3 Implementation of the Software 69 4.3.1 Main Process of the FPGA-Based Control Algorithm 70 4.3.2 Counter - A Fixed Saw-Tooth 71 4.3.3 Digital Notch Filter 72 4.3.4 Digital Voltage Compensator 73 4.4 Summary 74 CHAPTER 5 SIMULATION AND EXPERIMENTAL RESULTS 75 5.1 Introduction 75 5.2 Simulation Results for the Proposed Discrete-time OCC scheme 75 5.3 Experimental Results for the Proposed Discrete-time OCC scheme 80 5.3.1 Test Results under Steady State Condition 82 5.3.2 Test Results under Load Transient State 90 5.3.3 Test Results for Step Line Voltage Change 93 5.4 Summary 96 CHAPTER 6 CONCLUSIONS AND FUTURE WORKS 97 6.1 Conclusions 97 6.2 Future Works 98 REFERENCES 99 VITA 104

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