臺灣博碩士論文加值系統

切換式直流-直流電能轉換器被廣泛應用於電力電子電路，可驅分為兩種類型：切換式電感直流-直流電能轉換器與切換式電容直流-直流電能轉換器。切換式電容直流-直流電能轉換器架構具有切換式電感所沒有的優點，因此應用較廣。
本論文於既有電路架構中，提出與分析一具零電壓與零電流切換之多階模組電容箝位式直流-直流電能轉換器，特點為所有的開關元件不需使用任何輔助開關即能達到零電壓與零電流切換，並在開關導通瞬間能消除米勒效應以減少驅動損失，且不增加電壓與電流應力。本文實作一兩百瓦四階三模組具雙向零電壓與零電流切換之多階模組電容箝位式直流-直流電能轉換器雛型電路，依據模擬與實驗結果證實，本論文所提出電能轉換器相較於既有電路架構能呈現出更好之性能。

Grouped into two main categories of switched-inductor and switched-capacitor DC-DC power converters, the switching-mode DC-DC power converter is one of the widely used power electronic circuits. With many advantages over the switched-inductor type, the switched-capacitor DC-DC power converter topologies have been widely employed.
In this thesis, on the basis of existing topology a zero-voltage and zero-current switching (ZVZCS) scheme for multilevel modular capacitor-clamped DC-DC converter (MMCCC) is proposed and analyzed. The proposed ZVZCS MMCCC circuit features that all switching devices of the circuit can achieve ZVZCS without the need of extra auxiliary switching devices. The proposed ZVZCS MMCCC can eliminate the Miller effect of the power MOSFETs during turn-on operation with the total driving losses reduced. Furthermore, there is no additional voltage and current stress on all switches out of the ZVZCS. A 200 W, four-level, three-module prototype ZVZCS MMCCC circuit has been implemented and verified through simulations and experiments. Superior performance of the proposed circuit to the existing topology has been demonstrated in the thesis.

ABSTRACT I
摘要 III
誌謝 IV
TABLE OF CONTENTS V
LIST OF TABLES IX
LIST OF FIGURES X
CHAPTER 1. INTRODUCTION 1
1.1. BACKGROUNDS AND MOTIVATIONS 1
1.2. LITERATURE SURVEY 2
1.3. CONTRIBUTION OF THE THESIS 3
1.4. THESIS OUTLINE 4
CHAPTER 2. THE EXISTING CIRCUITS OF MULTILEVEL MODULAR CAPACITOR-CLAMPED DC-DC CONVERTER AND RELATED SOFT-SWITCHING TECHNOLOGIES REVIEW 5
2.1. INTRODUCTION 5
2.2. MMCCC 6
2.3. ZCS MMSCC 7
2.4. SUMMARY 8
CHAPTER 3. PROPOSED ZVZCS MMCCC 9
3.1. INTRODUCTION 9
3.2. THE PROPOSED ZVZCS MMCCC 9
3.3. CIRCUIT DESCRIPTION AND OPERATION PRINCIPLES 11
3.3.1. Step-down Mode 12
3.3.2. Step-up Mode 23
3.4. DESIGN GUIDELINES 31
3.4.1. Capacitance 31
3.4.2. Stray Inductance 32
3.4.3. Switching and Resonant Frequencies 34
3.4.4. ZVS Cell 34
3.5. SUMMARY 37
CHAPTER 4. SIMULATION AND EXPERIMENTAL RESULTS 38
4.1. INTRODUCTION 38
4.2. SIMULATED RESULTS 38
4.2.1. Step-down Mode 39
4.2.2. Step-up Mode 44
4.3. EXPERIMENTAL SETUP 49
4.4. EXPERIMENTAL RESULTS 52
4.4.1. Elimination of the Miller Effect 54
4.4.2. Step-Down Mode 55
4.4.3. Step-up Mode 61
4.5. EFFICIENCY MEASUREMENTS 67
4.5.1. Efficiency Measurements of the System 67
4.5.2. Efficiency Measurements of the Power Stage 70
4.5.3. Measurements of the total driving losses 73
4.6. SUMMARY 75
CHAPTER 5. CONCLUSIONS AND FUTURE RESEARCH WORKS 76
5.1. CONCLUSIONS 76
5.2. FUTURE RESEARCH WORKS 77
REFERENCES 79
APPENDIX A. SCHEMATICS OF THE PROPOSED ZVZCS MMCCC 86
A.1. BLOCK DIAGRAM OF THE PROPOSED ZVZCS MMCCC 86
A.2. MAIN CIRCUIT SCHEMATICS OF THE PROPOSED ZVZCS MMCCC 87
A.3. MODULAR CELL SCHEMATICS OF THE PROPOSED ZVZCS MMCCC 90
APPENDIX B. SIMPLIS? SIMULATION SCHEMATICS 92
APPENDIX C. PCB LAYOUT OF THE PROPOSED ZVZCS MMCCC 94
APPENDIX D. SOURCE CODE OF MICROCHIP? DSPIC30F4011 MICROCONTROLLER IN C LANGUAGE 95

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