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研究生：	李宗勳 Lee, Tsong-Shing
論文名稱：	兼具無線電能傳輸輔助之壓電變壓器與諧振電路設計研究 A Study of Piezoelectric Transformers and Resonance Circuit Design Aided with Wireless Power Transfer Capability
指導教授：	黃世杰 Huang, Shyh-Jier
學位類別：	博士 Doctor
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：	2015
畢業學年度：	103
語文別：	英文
論文頁數：	116
中文關鍵詞：	無線電力傳輸、頻率追蹤、感應線圈設計、電漿驅動電路、壓電變壓器、諧振電路、回授機制
外文關鍵詞：	wireless power transfer, frequency-tracking, inductive coil design, plasma-driven circuit, piezoelectric transformer, resonant circuit, feedback mechanism
相關次數：	點閱：165 下載：8
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伴隨科技進步，無線電能傳輸系統之不需與電極接觸的優點已漸被應用於電力傳輸及能量轉換裝置，而採用高壓電源激發電漿於清潔殺菌應用之概念，並已被工業界與家庭生活採用。因此，本論文主旨即在於研究無線電能傳輸系統於高壓電能轉換器應用，並針對所提之控制策略、回授機制、諧振架構與應用方法，予以深入分析探討。
本論文首先探討感應線圈之磁場耦合傳遞電能效率改善，並分析線圈距離改變與接收端負載阻抗變動時之電能轉換器輸出特性變化，進而藉由檢視諧振補償電路架構，整合提出適於本系統之操作頻率追蹤與回授機制。此外，由於感應線圈設計於無線電能傳輸中，扮演重要角色，因此在本論文研究中，已經由系統化設計概念提出一套感應線圈製作流程，將可隨著不同系統功率、傳輸距離、與線圈耦合之不同應用條件，妥善計算所需之感應線圈設計值。而由理論分析、數學運算模型建立、與硬體實作顯示本論文所提方法將可主動修正操作頻率以提昇電能傳輸效率與輸出穩定性，且所設計之感應線圈與諧振補償電路均能無線傳遞所需功率與達到柔性切換，確有助於無線電能傳輸相關應用領域之效能提昇參考。
其次，本論文考量電漿載子驅動電路中，電能轉換器常需仰賴龐大的磁性電感與電容作為諧振元件以產生高壓電源，而複雜的諧振電路設計與回授裝置則將影響運轉效能，致使侷限電漿載子驅動電路的開發競爭力。因此，本論文針對電漿驅動研究提出一整合壓電變壓器諧振電路之高壓電能轉換器，同時採用壓電變壓器以實現高壓諧振電路架構，不僅取代傳統磁性元件使用，並可達到模組化彈性擴充之優點。此方法經系統分析與實驗證實有效提高輸出電壓，符合激發電漿放電需求，有助於縮小電路體積與精簡諧振電路設計。
再者，為了增廣與延伸無線電能傳輸系統於高壓電能轉換器之應用領域，本論文融入一無線充電系統雛型，其所探討的操作頻率校正方法與直流轉換器之補償器優化設計，足以提供傳輸功率與穩定輸出電源供應至後級電漿驅動電路，另在此電路中加入電池模組充放電機制，以有助於所設計之系統具有備用電源與可攜式功能。綜由上述研究課題之控制策略與系統架構擬定，本論文所設計之整體電路系統具備電氣隔離與電極絕緣等安全性之優點，並兼備精簡化電路設計優勢。此論文研究成果兼可做為工業等級電漿驅動系統之商品開發與設計參考。

With a progress of technology, the merits of wireless energy transfer system is increasingly applied and witnessed in power transmission and energy conversion devices. In the mean time, the concept of plasma discharging through the firing of high-voltage source for cleaning and sterilization is widely adopted in industries and families. Therefore, this dissertation is aimed to investigate the application of wireless power transfer for high-voltage power converter applications, where the frequency-tracking control, the feedback mechanism, the resonant topology, and the design process are also included.
The thesis starts with the improvement of wireless power delivers, in which the inductive coil magnetic coupling and distance change that affecting the transmission efficiency are both analyzed. This is followed by the investigation of the resonance compensation structure and parameters, by which the feedback mechanism of phase-loop locked strategy is implemented to achieve the frequency-tracking of the system. Next, considering that the inductive coil design plays a critical role in the wireless power transfer, the dissertation proposes a manufacturing process and design approach, where the suitable values of coil for the applications under different source power, transmission gaps, and coupling coefficients can be calculated with ease. To verify the feasibility of this system, theoretical analyses are made and mathematical models are formulated along with hardware realizations. Test results indicate that the proposed method can adjust the operating frequency to promote the power transmission efficiency while the output voltage can be well stabilized. The coil design and resonance circuits suggested in this dissertation also ensure that the expected amount of power can be transferred in a wireless way, and the soft-switching is fulfilled. These outcomes are served as useful references for wireless power transfer applications.
Subsequently, in consideration of the plasma-driven circuit often employs the bulky magnetic inductors and capacitors as resonant elements to induce the high voltage, these complex circuit designs along with feedback device would affect the operating performance, restricting the industry competition for a further circuit development. Hence, this dissertation proposes a power converter with PT-based resonant architectures to replace conventional inductor-capacitor resonant tanks. The modular capacity operation made in this study helps increase the output power along with a higher flexibility. Experimental results indicate that the output voltage can be effectively increased to achieve the goal of plasma discharging, while the dimension of driving circuit is reduced and the resonant circuit design is simplified.
Next, in order to widely extend the application fields of wireless power transfer system for high-voltage power converters, this dissertation proposes a prototype design of contactless charging system platform. The dissertation includes an operating frequency correction method and a compensator design of converters such that sufficient amount of power can be supplied and the output voltage can be maintained for plasma-driven circuits. In addition, the circuit has added a battery module to reach the requirement of a portable plasma generator. Conclusively, from all of control strategies and system architectures proposed in this dissertation, the overall circuit system is seen to possess the merits of electrical isolation and electrode insulation, while the design process can be largely simplified. The research results gained from this dissertation can be also served as the reference of industrial design and development for plasma-driven systems.
Keywords: wireless power transfer, frequency-tracking, inductive coil design, plasma-driven circuit, piezoelectric transformer, resonant circuit, feedback mechanism.

摘要	I
Abstract	III
誌謝	VI
Contents	VII
List of Tables	X
List of Figures	XI
Symbols and Abbreviations	XVI
 Chapter 1 Introduction
1 Background and Motivation	1
2 Literature Survey	4
3 Contribution of Dissertation	7
4 Organization of Dissertation	8
Chapter 2 Theorem Analysis and Operating Principles of Proposed Systems
1 Introduction	12
2 Plasma Generation Mechanism	14
3 Resonant Property of the Piezoelectric Transformer	16
4 Inductive Magnetic Coupling Coils and Compensation Circuit	21
5 Control Approach of Asymmetrical Pulse-Width Modulation	27
6 Summary	29
 Chapter 3 Design of Piezoelectric Transformer-Based Plasma-Driven Circuits 
         with Inductive Power Transfer Enhancement
1 Introduction	30
2 Proposed Circuit Configuration	32
3 Design Principle and System Analysis	35
3.1 Inductive Power Transfer Circuit Design	35
3.2 Topology of Plasma-Driven Circuit	39
4 System Control Method	43
4.1 Feedback Method and Control Strategy of IPT Circuit	43
4.2 APWM Control Strategy of Plasma-Driven Circuit	47
5 Experimental Results	48
5.1 IPT Circuit Test	48
5.2 Plasma-Driven Circuit Test	51
6 Summary	56
Chapter 4 Design and Implementation of Contactless Charging System 
         Aided by A Bio-Inspired Algorithm
1 Introduction	57
2 Analysis of Coupling Circuit	57
3 Design Configuration and Analysis	59
3.1 Wireless Power Transmitter and Receiver	60
3.2 Design of Compensator	61
3.3 Li-ion Battery Charging Circuit	65
4 Shuffled Frog-Leaping Algorithm (SFLA)	67
4.1 Overview of SFLA	67
4.2 Model of SFLA Method	67
5 Experimental Results	71
6 Summary	74
Chapter 5 Wireless Power Transfer-Enhanced Plasma-Driven Circuits 
         with Piezoelectric Transformer-Based Feedback Control 
1 Introduction	75
2 Proposed Configuration and Circuit Analysis	75
2.1 Plasma-Driven Circuit and Feedback Control	76
2.2 Analysis of the PT-Based Resonant Circuit	79
2.3 Wireless Power Transfer and High-Frequency Coil Design	82
2.4 Resonant Circuit Analysis of Inductively Coupled Coils	85
3 Implementation of Control Strategies	89
3.1 Constant-Power Control of Plasma-Driven Circuit	89
3.2 Phase-Locked Loop Controller of Wireless Power Transfer Circuit	91
4 Experimental Results	94
4.1 Wireless Power Transfer Circuit Test	94
4.2 Plasma-Driven Circuit Test	98
5 Summary	101
 Chapter 6 Conclusions
1 Conclusions	102
2 Future Study	103
References	104
Biography	112
List of Publications	113
                                    

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