因近年來電子產品使用率逐年提升，為使電子產品於充電上能更加快速、簡單且安全，並去除電子接點充電所造成的各種缺點。本文提出一種電子產品充電應用的電場耦合式無線能量傳輸系統。本文首先分類各種無線能量傳輸系統，同時介紹各個無線能量傳輸系統的基本動作原理與比較各系統的優缺點。再來選擇電場耦合式無線能量傳輸系統為本文的傳輸方式，提出耦合極板的π型等效模型的推導與分析，並比較各電場耦合式無線能量傳輸系統的諧振架構。最終選用雙邊LCLC諧振式電場耦合式無線能量傳輸系統為本文的主架構，並分析其基本動作原理。
透過分析本文進一步提出一套設計流程，依照此流程進行設計，可確保電場耦合式無線能量傳輸系統於指定之距離、負載變動範圍以及適當的頻率變動頻率範圍內仍可以達到穩定的電壓輸出。最終實作出輸出入電壓均為100 V，輸出功率為440 W，傳送距離為5 cm且最高效率為72%之雙邊LCLC諧振式電場耦合式無線能量傳輸轉換器原型機。

Due to the usage rate of the consumer electronics product increases year by year. In order to charge the product faster, easier, safer and get rid of disadvantage cause by electric junction. This thesis proposed a capacitive (electric field based) wireless power transfer system for consumer electronics product. First, the fundamental principal for each wireless power transfer system has been introduced. Next, the precise π-type equivalent model for the capacitive power transfer system’s coupling plate has been proposed. Then each resonant structure for capacitive power transfer system has been compared and analyzed. Finally, Double-Sided LCLC resonant capacitive power transfer system has been chosen and analyzed.
By analyzing a design process that can guarantee capacitive power transfer system with steady output voltage between designated distance, load variation range and allowable frequency variation range has been referred in this thesis. Finally, a prototype of Double-Sided LCLC resonant capacitive power transfer system with 100V input and output voltage, 440W output power, 5cm plate distance, and 72% peak efficiency has been implemented and measured.

[1] J. M. Wang and S. T. Wu. “A Synchronous Buck DC-DC Converter Using a Novel Dual-Mode Control Scheme to Improve Efficiency,” in IEEE Transactions on Power Electronics, vol. 32, no. 9, pp. 6983-6993, September 2017.
[2] B. C. Wang, Y. Yuan, Y. Zhou and X. F. Sun. “Buck/Boost Bidirectional Converter TCM Control Without Zero-Crossing Detection,” in 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia), Hefei, May 2016.
[3] J. H. Jung, H. S. Kim, M. H. Ryu and J. W. Baek. “Design Methodology of Bidirectional CLLC Resonant Converter for High-Frequency Isolation of DC Distribution Systems,” in IEEE Transactions on Power Electronics, vol.28, no.4, pp. 1741-1755, August 2012.
[4] A. Esser and H.C. Skudelny. “A new approach to power supplies for robots,” in IEEE Transactions on Industry Applications, vol. 27, no. 5, pp 872-875, October 1990.
[5] A. Kawamun, K. Ishioka and J. Hirai. “Wireless transmission of power and information through one high frequency resonant AC link inverter for robot manipulator applications,” in Conference Record of the 13th IEEE Industry Applications Conference Meeting IAS ’95, vol. 3, pp 2367-2372, October 1995.
[6] T. Wang, X. S. Fu, J. Ma, T. Zhan, Q. J. Wang, X. Y. Yi, G. H. Wang, J. M. Li and T. Wang. “Analysis of impedance matching network on LED novel driving system based on the wireless power transfer,” in 2015 12th China International Forum on Solid State Lighting (SSLCHINA), Shenzhen, pp. 93-96, November 2015.
[7] V. T. Nguyen, S. H. Kang, J. H. Choi and C. W. Jung, “Magnetic resonance wireless power transfer using three-coil system with single planar receiver for laptop applications,” in IEEE Transactions on Consumer Electronics, vol. 61, no. 2, pp. 160-166, May 2015.
[8] V. T. Nguyen, S. H. Kang and C. W. Jung, “Wireless power transfer for mobile devices with consideration of ground effect,” in 2015 IEEE Wireless Power Transfer Conference (WPTC), Boulder, pp. 1-4, May 2015.
[9] S. Y. Jeong, V. X. Thai, J. H. Park and C. T. Rim, “Self-Inductance-Based Metal Object Detection With Mistuned Resonant Circuits and Nullifying Induced Voltage for Wireless EV Chargers,” in IEEE Transactions on Power Electronics, vol. 34, no. 1, pp.748-758, January 2019.
[10] A. Kumar, S. Pervaiz, C. K. Chang, S. Korhummel, Z. Popovic and K. K. Afridi, “Investigation of power transfer density enhancement in large air-gap capacitive wireless power transfer systems,” in 2015 IEEE Wireless Power Transfer Conference (WPTC), Boulder, May 2015.
[11] W. C. Brown, “The History of Power Transmission by Radio Waves,” in IEEE Transactions on Microwave Theory and Techniques, vol. 32, no. 9, pp. 1230-1242, September 1984.
[12] H. Zhang, F. Lu, H. Hofmann, W. Liu and C. Chris Mi, “Six-Plate Capacitive Coupler to Reduce Electric Field Emission in Large Air-Gap Capacitive Power Transfer,” in IEEE Transactions on Power Electronics, vol. 33, no. 1, pp. 665-675, January 2018.
[13] H. Zhang, F. Lu, H. Hofmann, W. Liu and C. Chris Mi, “A Four-Plate Compact Capacitive Coupler Design and LCL-Compensated Topology for Capacitive Power Transfer in Electric Vehicle Charging,” in IEEE Transactions on Power Electronics, vol. 31, no. 12, pp. 8541-8551, December 2016.
[14] S. Sinha, A. Kumar, B. Regensburger and K. K. Afridi, “A New Design Approach to Mitigating the Effect of Parasitics in Capacitive Wireless Power Transfer Systems for Electric Vehicle Charging,” in IEEE Transactions on Transportation Electrification, vol. 5, no. 4, pp. 1040-1059, December 2019.
[15] K. Yamada and T. Ohira, “Graphical Representation of the Power Transfer Efficiency of Lumped-Element Circuits Based on Hyperbolic Geometry,” in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 64, no. 5, pp. 485-489, May 2017.
[16] F. Lu, H. Zhang, H. Hofmann and C. Chris Mi, “A Double-Sided LC-Compensation Circuit for Loosely Coupled Capacitive Power Transfer,” in IEEE Transactions on Power Electronics, vol. 33, no. 2, pp. 1633-1643, February 2018.
[17] F. Lu, H. Zhang, H. Hofmann and C. Chris Mi, “A CLLC-compensated high power and large air-gap capacitive power transfer system for electric vehicle charging applications,” in 2016 IEEE Applied Power Electronics Conference and Exposition (APEC), Long Beach, March 2016.
[18] F. Lu, H. Zhang, H. Hofmann and C. Chris Mi, “A Double-Sided LCLC-Compensated Capacitive Power Transfer System for Electric Vehicle Charging,” in IEEE Transactions on Power Electronics, vol. 30, no. 11, pp. 6011-6014, November 2015.
[19] C. Zheng, J. S. Lai, R. Chen, W. E. Faraci, Z. U. Zahid, B. Gu, L. Zhang, G. Lisi and D. Anderson, “High-Efficiency Contactless Power Transfer System for Electric Vehicle Battery Charging Application,” in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 3, no. 1, pp. 65-74, March 2015.