1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China; 2. Laboratory of Low-frequency Electro-magnetic Communication Technology with the 722 Research Institute CSIC Wuhan 430205 China
Abstract：Wireless power transmission (WPT) and electrical vehicle (EV) technology have been rapidly developed in recently decades. However, EVs are not widely accepted by consumers because of the battery bottleneck and recharging difficulties. Thus, the dynamic wireless charging solution is reconsidered. Aiming at the problem that the transmission power is easy to fluctuate with the coupling coils over large misalignment, a primary T-type compensation network from the perspective of smoothing the transmission power is proposed in this paper. Under the premise of ensuring high transmission efficiency and soft switching, the proposed T-type compensation network maintains a stable output characteristic over a wide misalignment. It also has an inherent current limiting ability under no-load operation. A 500W WPT prototype is built. The output power maintains almost constant within 40 percentage of horizontal misalignment, showing the effectiveness of the design method.
[1] 曹玲玲, 陈乾宏, 任小永, 等. 电动汽车高效率无线充电技术的研究进展[J]. 电工技术学报, 2012, 27(8): 1-13. Cao Lingling, Chen Qianhong, Ren Xiaoyong, et al. Review of the efficient wireless power transmission technique for electric vehicles[J]. Transactions of China Electrotechnical Society, 2012, 27(8): 1-13. [2] 杨庆新, 章鹏程, 祝丽花, 等. 无线电能传输技术的关键基础与技术瓶颈问题[J]. 电工技术学报, 2015, 30(5): 1-8. Yang Qingxin, Zhang Pengcheng Zhu LiHua, et al. Key fundamental problems and technical bottlenecks of the wireless power transmission technology[J]. Transactions of China Electrotechnical Society, 2015, 30(5): 1-8. [3] S Li, C C Mi. Wireless power transfer for electric vehicle applications[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2015, 3(1): 4-17. [4] Covic G A, Boys J T. Modern trends in inductive power transfer for transportation applications[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2013, 1(1): 28-41. [5] Huh J, Lee S W, Lee W Y, et al. Narrow-width inductive power transfer system for online electrical vehicles[J]. IEEE Transactions on Power Electronics, 2011, 26(12): 3666-3679. [6] 田勇. 基于分段导轨模式的电动车无线供电技术关键问题研究[D]. 重庆: 重庆大学, 2012. [7] Keeling N A, Covic G A, Boys J T. A unity- power-factor IPT pickup for high-power appli- cations[J]. IEEE Transactions on Industrial Elec- tronics, 2010, 57(2): 744-751. [8] 侯佳, 陈乾宏, 严开沁, 等. 新型S/SP补偿的非接触谐振变换器分析与控制[J]. 中国电机工程学报, 2013, 33(33): 2-8. Hou Jia, Chen Qianhong, Yan Kaiqin, et al. Analysis and control of S/SP compensation contactless resonant converters[J]. Proceedings of the CSEE, 2013, 33(33): 2-8. [9] Villa J L, Sallan J, Sanz Osorio J F, et al. High-misalignment tolerant compensation topology for ICPT systems[J]. IEEE Transactions on Industrial Electronics, 2012, 59(2): 945-951. [10] 程鹏天, 王健强, 杜秀. 电动汽车感应耦合充电系统一种新型拓扑的研究[J]. 电工技术学报, 2013, 28(2): 86-91. Cheng Pengtian, Wang Jianqiang, Du Xiu. Investi- gation of a novel topology for inductively coupled charging system in electric vehicles[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 86-91. [11] Zhao Jinbo, Feng Hao, Cai Tao, et al. The complex ratio transformer model and its application in magnetic resonant WPT[C]//IEEE Conference and Exp on Transportation Electrification Asia-Pacific, Beijing, 2014: 1-5. [12] Zhong W, Hui S Y R. Maximum energy efficiency tracking for wireless power transfer systems[J]. IEEE Transaction Power Electronics, 2015, 30(7): 4025- 4034.
2017, Vol. 32 
