多頻線圈模組將能有效地實現多頻段、高功率或快速充電的無線功率傳輸系統。因此，它將成為未來無線功率傳輸的重要研究議題之一。本論文提出一雙頻線圈模組作為實現多頻無線功率傳輸應用的實例。不同於多線圈組的雙頻無線功率傳輸，本論文所提出的線圈模組僅使用一組線圈作為功率耦合傳輸，以避免產生不必要的交互耦合現象。依據所提出的雙頻線圈模組之設計方法，經由適當的線圈參數的選擇，將可提升無線功率傳輸在弱耦合狀態下的效率和避免發生強耦合狀態下的頻率分裂現象。
當兩工作頻率的比率值變大時，雙頻無線功率傳輸將無法有效地運作。為了克服這個問題，本論文進一步提出採用中繼線圈的改良式線圈模組。相對於應用在一般單頻的無線功率傳輸系統，本論文提出了適用於多樣化雙頻線圈模組的中繼線圈之電路分析。所提出的設計方法將可有效地運用在採用中繼線圈的雙頻無線功率傳輸系統。實驗結果的數據都能與所提出的電路設計方法吻合。因此，本論文實現了有效的雙頻線圈模組，而將有助於多頻無線功率傳輸系統的應用實現。

Multi-band coil modules facilitate efficient access to distinct-band, high-power, or rapid-charging wireless power transfer (WPT) systems. It will be one of the important WPT research topics in the future. A dual-band WPT coil module is presented as an example of multi-band WPT applications in this dissertation. Different from multi-coil dual-band WPT, no unwanted cross coupling exists in this dual-band coil module because it uses only one coil for power coupling. An analytical process of the dual-band coil module design guideline is presented. By selecting appropriate coil parameters, the improvement of coil power transfer efficiency in the weakly coupling region can be obtained and the frequency splitting in the strongly coupling region can be avoided.
When the frequency ratio between two operating frequencies is large, dual-band WPT do not function efficiently. To overcome this problem, the enhanced dual-band coil modules that adopt repeaters in the WPT system is proposed. In comparison to the conventional analysis of a single-band repeater, the circuit-based analysis for repeaters applied at various dual-band coil modules is presented. The analytical results provide a design methodology applicable to diverse types of dual-band coil modules with a repeater in the WPT system. The experimental results are consistent with the circuit-based analysis. Therefore, efficient dual-band coil modules are obtained in this dissertation and they facilitate the realization and application of multi-band WPT systems.

論文審定書 i
誌謝 iii
中文摘要 iv
ABSTRACT v
CONTENTS vi
LIST OF FIGURES viii
LIST OF TABLES xiii
CHAPTER 1 INTRODUCTION 1
1.1 Research Motivation 2
1.2 Overview 5
CHAPTER 2 DUAL-BAND WPT COIL MODULE 7
2.1 Dual-Band Coil Design 7
2.2 Dual-Band Coil Module 11
2.2.1. Dual-Band Impedance Matching 12
2.2.2. Dual-Band Coil Module PTE 23
2.3 Experimental Analysis 28
CHAPTER 3 DUAL-BAND EFFICIENCY DISCREPANCY AND WPT REPEATER 34
3.1 Efficiency Discrepancy 34
3.2 WPT Repeater 36
3.2.1 Effect of Repeater on WPT System 37
3.2.2 Coil Module With Odd Repeater 45
CHAPTER 4 DUAL-BAND COIL MODULE WITH REPEATER 47
4.1 Dual-Band TX Coil to Individual Single-Band RX Coils 47
4.2 Dual-Band TX Coil to Multiple Single-Band RX Coils 50
4.3 Dual-Band TX Coil to Dual-Band RX Coil 52
4.4 Experimental Analysis 54
4.4.1 Type-I 200-kHz and 6.78-MHz Experiment 57
4.4.2 Type-II 200-kHz and 6.78-MHz Experiment 59
4.4.3 Type-III Experiment 61
4.4.4 Experiment With Varied Distance and Load 65
CHAPTER 5 CONCLUSION 71
APPENDIX WPT PARAMETERS DERIVATION AND VALIDATION PROCESS 73
A.1 Main Parameters of Dual-Band Coil Design Guideline 73
A.2 Lossless Equality of Dual-Band WPT Impedance Matching 74
A.3 Validation Among Coil PTE and Conventional PTE Expressions 75
A.4 Lossless Coil PTE of WPT System With a Repeater 77
REFERENCES 78
VITA 85

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