本論文旨在開發一套具備增強線圈錯位容忍能力之無線電能傳輸系統，此研究主要考量接收端感應線圈偏移時，可能影響傳輸端線圈磁場耦合情形，導致系統傳輸效率降低。因此，本文提出一套四線圈感應架構，並輔以四組高頻換流器同時調整責任週期，以穩定接收端線圈偏移時之耦合變化。此研究經由評估四組接收端對單組接收端之感應線圈幾何架構，據以設計感應線圈對稱配置方法，以達到高錯位容忍能力，而本系統藉由線圈間之互感耦合關係推導與分析，探討諧振補償電路之參數設計，輔以擬定一套具備偏移方位偵測與傳輸功率調變功能之控制策略，兼可有效調整各組傳輸模組功率，進而改善接收端偏移導致之傳輸效能降低情形。至為驗證所提系統設計可行性，本論文建構一套硬體測試平台與感應線圈模組及進行電能傳輸實測，測試結果顯示本研究之四線圈無線電能傳輸系統具有實用價值，並可協助無線電能傳輸系統研發及改良應用時之設計參考。

This thesis is aimed to develop a wireless power transfer system enhanced with the tolerance capability of coil misalignment, which is motivated because the inductive coil displacement at the receiver side often leads to the low magnetic coupling, reducing transmission efficiency of the system. Therefore, this study is endeavored to propose a quad-coil design aided by four high-frequency inverters along with the tuning of duty cycle in order to ensure that coupling variation is evenly maintained during the occurrence of misalignment. By evaluating geometric architecture of four transmitters and the single receiver, this research suggests a symmetrical coil placement method in anticipation of reaching a high tolerance capability of misalignment. It is followed by the analysis of mutual coupling between coils, through which the parameter design of resonance compensation circuit is investigated. Based on these analysis results, the thesis proposes a control strategy of the capability of misalignment detection and power modification, excelling at the adjustment the power of each transmission module and improving the transmission efficiency. To confirm the effectiveness of this proposed system, a hardware test platform and inductive coil module are realized and tested. Experimental results reveal the feasibility of this proposed method, which is useful for the development and improvement of wireless power transfer system applications.

[1]N. S. Jeong and F. Carobolante, “Wireless Charging of a Metal-Body Device,” IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 4, pp. 1077-1086, April 2017.
[2]Y. H. Zhang, “An Implementation of an Automatic Adjustment Power Transfer Position Wireless Battery Charging System for Mobile Devices,” IEEE Global Conference on Consumer Electronics (GCCE), pp. 1-2, Nagoya, Japan, October 2017.
[3]G. Buja, M. Bertoluzzo, and K. N. Mude, “Design and Experimentation of WPT Charger for Electric City Car,” IEEE Transactions on Industrial Electronics, Vol. 62, No. 12, pp. 7436-7447, December 2015.
[4]Z. Li, C. Zhu, J. Jiang, K. Song, and G. Wei, “A 3-kW Wireless Power Transfer System for Sightseeing Car Supercapacitor Charge,” IEEE Transactions on Power Electronics, Vol. 32, No. 5, pp. 3301-3316, May 2017.
[5]M. Mohammad, S. Choi, Z. Islam, S. Kwak, and J. Baek, “Core Design and Optimization for Better Misalignment Tolerance and Higher Range of Wireless Charging of PHEV,” IEEE Transactions on Transportation Electrification, Vol. 3, No. 2, pp. 445-453, June 2017.
[6]A. Ahmad, M. S. Alam, and R. Chabaan, “A Comprehensive Review of Wireless Charging Technologies for Electric Vehicles,” IEEE Transactions on Transportation Electrification, Vol. 4, No. 1, pp. 38-63, March 2018.
[7]R. G. Gago, S. F. Pinto, and J. F. Silva, “G2V and V2G Electric Vehicle Charger for Smart Grids,” IEEE International Smart Cities Conference, Trento, pp. 1-6, September 2016.
[8]K. W. Hu, P. H. Yi, and C. M. Liaw, “An EV SRM Drive Powered by Battery/Supercapacitor With G2V and V2H/V2G Capabilities,” IEEE Transactions on Industrial Electronics, Vol. 62, No. 8, pp. 4714-4727, August 2015.
[9]A. A. S. Mohamed, A. A. Marim, and O. A. Mohammed, “Magnetic Design Considerations of Bidirectional Inductive Wireless Power Transfer System for EV Applications,” IEEE Transactions on Magnetics, Vol. 53, No. 6, pp. 1-5, June 2017.
[10]S. Li, W. Li, J. Deng, T. D. Nguyen, and C. C. Mi, “A Double-Sided LCC Compensation Network and Its Tuning Method for Wireless Power Transfer,” IEEE Transactions on Vehicular Technology, Vol. 64, No. 6, pp. 2261-2273, June 2015.
[11]H. C. Son, J. W. Kim, Y. J. Park, and K. H. Kim, “Efficiency Analysis and Optimal Design of a Circular Loop Resonant Coil for Wireless Power Transfer,” Asia-Pacific Microwave Conference, pp. 849-852, Yokohama, Japan, December 2010.
[12]G. R. Nagendra, G. A. Covic, and J. T. Boys, “Sizing of Inductive Power Pads for Dynamic Charging of EVs on IPT Highways,” IEEE Transactions on Transportation Electrification, Vol. 3, No. 2, pp. 405-417, June 2017.
[13]L. Zhao, S. Ruddell, D. J. Thrimawithana, U. K. Madawala, and P. A. Hu, “A Hybrid Wireless Charging System with DDQ Pads for Dynamic Charging of EVs,” IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer, pp. 1-6, Chongqing, Chain, May 2017.
[14]K. Hwang, J. Cho, J. Park, D. Har, and S. Ahn, “Ferrite Position Identification System Operating With Wireless Power Transfer for Intelligent Train Position Detection,” IEEE Transactions on Intelligent Transportation Systems, Early Access, pp. 1-9, February 2018.
[15]A. Zaheer, G. A. Covic, and D. Kacprzak, “A Bipolar Pad in a 10-kHz 300-W Distributed IPT System for AGV Applications,” IEEE Transactions on Industrial Electronics, Vol. 61, No. 7, pp. 3288-3301, July 2014.
[16]M. Liu, M. Fu, Y. Wang, and C. Ma, “Battery Cell Equalization via Megahertz Multiple-Receiver Wireless Power Transfer,” IEEE Transactions on Power Electronics, Vol. 33, No. 5, pp. 4135-4144, May 2018.
[17]M. Fu, T. Zhang, X. Zhu, P. C. K. Luk, and C. Ma, “Compensation of Cross Coupling in Multiple-Receiver Wireless Power Transfer Systems,” IEEE Transactions on Industrial Informatics, Vol. 12, No. 2, pp. 474-482, April 2016.
[18]M. Fu, H. Yin, M. Liu, Y. Wang, and C. Ma, “A 6.78 MHz Multiple-Receiver Wireless Power Transfer System With Constant Output Voltage and Optimum Efficiency,” IEEE Transactions on Power Electronics, Vol. 33, No. 6, pp. 5330-5340, June 2018.
[19]G. Monti, M. Dionigi, M. Mongiardo, and R. Perfetti, “Optimal Design of Wireless Energy Transfer to Multiple Receivers: Power Maximization,” IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 1, pp. 260-269, January 2017.
[20]H. Yin, M. Fu, M. Liu, J. Song, and C. Ma, “Autonomous Power Control in a Reconfigurable 6.78-MHz Multiple-Receiver Wireless Charging System,” IEEE Transactions on Industrial Electronics, Vol. 65, No. 8, pp. 6177-6187, August 2018.
[21]P. K. S. Jayathurathnage, A. Alphones, D. M. Vilathgamuwa, and A. Ong, “Optimum Transmitter Current Distribution for Dynamic Wireless Power Transfer With Segmented Array,” IEEE Transactions on Microwave Theory and Techniques, Vol. 66, No. 1, pp. 346-356, January 2018.
[22]A. Kamineni, M. J. Neath, A. Zaheer, G. A. Covic, and J. T. Boys, “Interoperable EV Detection for Dynamic Wireless Charging With Existing Hardware and Free Resonance,” IEEE Transactions on Transportation Electrification, Vol. 3, No. 2, pp. 370-379, June 2017.
[23]B. Kallel, O. Kanoun, and H. Trabelsi, “Large Air Gap Misalignment Tolerable Multi-Coil Inductive Power Transfer for Wireless Sensors,” IET Power Electronics, Vol. 9, No. 8, pp. 1768-1774, June 2016.
[24]H. Matsumoto, Y. Neba, H. Iura, D. Tsutsumi, K. Ishizaka, and R. Itoh, “Trifoliate Three-Phase Contactless Power Transformer in Case of Winding-Alignment,” IEEE Transactions on Industrial Electronics, Vol. 61, No. 1, pp. 53-62, January 2014.
[25]K. Ahmed, M. Aamir, M. K. Uddin, and S. Mekhilef, “A New Coil Design for Enhancement in Misalignment Tolerance of Wireless Charging System,” IEEE Student Conference on Research and Development, pp. 215-219, Kuala Lumpur, Malaysia, December 2015.
[26]S. Kim, G. A. Covic, and J. T. Boys, “Tripolar Pad for Inductive Power Transfer Systems for EV Charging,” IEEE Transactions on Power Electronics, Vol. 32, No. 7, pp. 5045-5057, July 2017.
[27]X. Mou, O. Groling, and H. Sun, “Energy-Efficient and Adaptive Design for Wireless Power Transfer in Electric Vehicles,” IEEE Transactions on Industrial Electronics, Vol. 64, No. 9, pp. 7250-7260, September. 2017.
[28]S. Kim, G. A. Covic, and J. T. Boys, “Comparison of Tripolar and Circular Pads for IPT Charging Systems,” IEEE Transactions on Power Electronics, Vol. 33, No. 7, pp. 6093-6103, July 2018.
[29]Y. C. Hsieh, Z. R. Lin, M. C. Chen, H. C. Hsieh, Y. C. Liu, and H. J. Chiu, “High-Efficiency Wireless Power Transfer System for Electric Vehicle Applications,” IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 64, No. 8, pp. 942-946, August 2017.
[30]S. Samanta and A. K. Rathore, “Analysis and Design of Load-Independent ZPA Operation for P/S, PS/S, P/SP, and PS/SP Tank Networks in IPT Applications,” IEEE Transactions on Power Electronics, Vol. 33, No. 8, pp. 6476-6482, August 2018.
[31]T. S. Lee, S. J. Huang, R. Y. Chen, and Y. H. Yeh, “Enhancement of Plasma-Driven System with Piezoelectric Transformer-Based Feedback Control Approaches and a Contactless Power Source,” IEEE Transactions on Industrial Electronics, Vol. 62, No. 12, pp. 7469-7478, December 2015.
[32]T. Mishima, S. Sakamoto, and C. Ide, “ZVS Phase-Shift PWM-Controlled Single-Stage Boost Full-Bridge AC-AC Converter for High-Frequency Induction Heating Applications,” IEEE Transactions on Industrial Electronics, Vol. 64, No. 3, pp. 2054-2061, March 2017.
[33]S. J. Huang, Y. J. Li, B. G. Huang, T. H. Huang, and T. S. Lee, “Contactless Energy-Transfer System Design for Lithium Iron Phosphate Battery-Charging Circuits,” IEEE International Conference on Power Electronics and Drive Systems, pp. 217-220, Kitakyushu, Japan, April 2013.
[34]H. Ma, G. Chen, J. H. Yi, Q. W. Meng, L. Zhang, and J. P. Xu, “A Single-Stage PFM-APWM Hybrid Modulated Soft-Switched Converter with Low Bus Voltage for High-Power LED Lighting Applications,” IEEE Transactions on Industrial Electronics, Vol. 64, No. 7, pp. 5777-5788, July 2017.
[35]K. Ali, P. Das, and S. K. Panda, “Analysis and Design of APWM Half-Bridge Series Resonant Converter With Magnetizing Current Assisted ZVS,” IEEE Transactions on Industrial Electronics, Vol. 64, No. 3, pp. 1993-2003, March 2017.
[36]COMSOL Multiphysics，Pitotech Company, Ltd., March 2014.
[37]SCT2080KE Data Sheet, ROHM Semiconductor, 2015.
[38]RHRP30120 Data Sheet, Fairchild Semiconductor, 2013.
[39]TMS320F2833x, TMS320F2823x Digital Signal Controllers (DSCs), Texas Instruments Incorporated, 2016.
[40]HCPL-3120 Data Sheet, Avago Technologies, 2016.
[41]TL084CN Data Sheet, Texas Instruments Incorporated, 2014.
[42]LA55-P Data Sheet, LEM Corporation, 2015.