Coupling Mechanism Analysis for Multi-Transmitter Switching Wireless Power Transfer System
Tan Ping'an1, 2, Liu Chunxia1, Ye Liangwei1, Peng Tao1, Gao Xieping1, 2
1. School of Information Engineering Xiangtan University Xiangtan 411105 China; 2. MOE Key Laboratory of Intelligent Computing & Information Processing Xiangtan 411105 China
Abstract：The coil misalignment problem may reduce the mutual inductance between the coils and also induce the dynamic changes of system optimal load, resulting in a significant decrease in the transmission efficiency of the wireless power transfer (WPT) system. Therefore, this paper presented a multi-transmitter switching coupler to improve the tolerance of lateral misalignment for the WPT system, where in the multi-transmitter is composed of hexagon coils and the receiver is a circular coil. Firstly, the coil structure and working mode of this coupler were analyzed, and the mutual inductance calculation method of the coupler under the condition of axial symmetry and lateral misalignment was constructed. Meanwhile, the evolution law of the coupling coefficient with the lateral misalignment was quantitatively analyzed, and the switching criterion of the transmitting coil was determined. Consequently, the change of coupling coefficient after switching was determined and the dynamic matching conditions of the system optimal load was derived. The experimental results show that the multi-transmitter switching coupler can effectively solve the coil misalignment problem of wireless power transfer system, and can improve the transmission efficiency and stability of the system.
谭平安, 刘春霞, 叶良伟, 彭涛, 高协平. 多发射切换式无线电能传输系统耦合特性机理分析[J]. 电工技术学报, 2018, 33(22): 5244-5253.
Tan Ping'an, Liu Chunxia, Ye Liangwei, Peng Tao, Gao Xieping. Coupling Mechanism Analysis for Multi-Transmitter Switching Wireless Power Transfer System. Transactions of China Electrotechnical Society, 2018, 33(22): 5244-5253.
[1] 黄学良, 谭林林, 陈中, 等. 无线电能传输技术研究与应用综述[J]. 电工技术学报, 2013, 28(10): 1-11. Huang Xueliang, Tan Linlin, Chen Zhong, et al.Review and research progress on wireless power transfer technology[J]. Transactions of China Electrotechnical Society, 2013, 28(10): 1-11. [2] 李阳, 张雅希, 杨庆新, 等. 磁耦合谐振式无线电能传输系统最大功率效率点分析与实验验证[J]. 电工技术学报, 2016, 31(2): 18-24. Li Yang, Zhang Yaxi, Yang Qingxin, et al.Analysis and experimental validation on maximum power and efficiency in wireless power transfer system via coupled magnetic resonances[J]. Transactions of China Electrotechnical Society, 2016, 31(2): 18-24. [3] 张波, 疏许健, 黄润鸿. 感应和谐振无线电能传输技术的发展[J]. 电工技术学报, 2017, 32(18): 3-17. Zhang Bo, Shu Xujian, Huang Runhong.The development of inductive and resonant wireless power transfer technology[J]. Transactions of China Electrotechnical Society, 2017, 32(18): 3-17. [4] 苏玉刚, 赵鱼名, 谢诗云, 等. 电场耦合无线电能传输系统负载软切换控制技术[J]. 电工技术学报, 2017, 32(18): 44-51. Su Yugang, Zhao Yuming, Xie Shiyun, et al.Control of load soft-switched for electric-field coupled power transfer system[J]. Transactions of China Electro- technical Society, 2017, 32(18): 44-51. [5] 周洪, 蒋燕, 胡文山, 等. 磁共振式无线电能传输系统应用的电磁环境安全性研究及综述[J]. 电工技术学报, 2016, 31(2): 1-12. Zhou Hong, Jiang Yan, Hu Wenshan, et al.Review and research on health and safety issues for magnetically-coupled resonant wireless power transfer systems[J]. Transactions of China Electrotechnical Society, 2016, 32(2): 1-12. [6] Si P, Hu A P, Malpas S, et al.A frequency control method for regulating wireless power to implantable devices[J]. IEEE Transactions on Biomedical Circuits & Systems, 2008, 2(1): 22-29. [7] Hui S Y.Planar wireless charging technology for portable electronic products and Qi[J]. IEEE Proceedings, 2013, 101(6): 1290-1301. [8] 宋显锦, 刘国强, 张超, 等. 电动大巴动力电池组的谐振分组式无线充电[J]. 电工技术学报, 2013, 28(增刊2): 92-98. Song Xianjin, Liu Guoqiang, Zhang Chao, et al.Resonance wireless charging technology in separate groups for the power battery packs of electric buses[J]. Transactions of China Electrotechnical Society, 2013, 28(S2): 92-98. [9] 赵争鸣, 刘方, 陈凯楠. 电动汽车无线充电技术研究综述[J]. 电工技术学报, 2016, 31(20): 30-40. Zhao Zhengming, Liu Fang, Chen Kainan.New progress of wireless charging technology for electric vehicles[J]. Transactions of China Electrotechnical Society, 2016, 31(20): 30-40. [10] 张献, 章鹏程, 杨庆新, 等. 基于有限元方法的电动汽车无线充电耦合机构的磁屏蔽设计与分析[J].电工技术学报, 2016, 31(1): 71-79. Zhang Xian, Zhang Pengcheng, Yang Qingxin, et al.Magnetic shielding design and analysis for wireless charging coupler of electric vehicles based on finite element method[J]. Transactions of China Electro- technical Society, 2016, 31(1): 71-79. [11] Budhia M, Covic G A, Boys J T.Design and optimization of circular magnetic structures for lumped inductive power transfer systems[J]. IEEE Transactions on Power Electronics, 2011, 26(11): 3096-3108. [12] Elliott G A J, Raabe S, Covic G A, et al. Multiphase pickups for large lateral tolerance contactless power transfer systems[J]. IEEE Transactions on Industrial Electronics, 2010, 57(5): 1590-1598. [13] Mou Xiaolin, Groling O, Gallant A, et al.Energy efficient and adaptive design for wireless power transfer in electric vehicles[C]//2016 IEEE 83rd Vehicular Technology Conference, Nanjing, China, 2016:10.1109/VTCSpring.2016.7504220. [14] Tan Pingan, Cao Saiqi, Gao Xieping.Adjustable coupler for inductive contactless power transfer system to improve lateral misalignment tolerance[C]// IEEE Power Electronics and Motion Control Con- ference, Hefei, China, 2016: 2423-2426. [15] 关就. 多维旋转式无线输电装置的研究与设计[D]. 广州: 华南理工大学, 2014. [16] 戴欣, 李璐, 余细雨, 等. 基于正四面体的无线电能传输系统多自由度电能拾取机构[J]. 中国电机工程学报, 2016, 36(23): 6460-6467. Dai Xin, Li Lu, Yu Xiyu, et al.Multi-degree-of- freedom pick-up mechanism of wireless power transfer systems based on the regular tetrahedron[J]. Proceedings of the CSEE, 2016, 36(23): 6460-6467. [17] Chow J P W, Chen N, Chung H S H, et al. An investigation into the use of orthogonal winding in loosely coupled link for improving power transfer efficiency under coil misalignment[J]. IEEE Transactions on Power Electronics, 2015, 30(10): 5632-5649. [18] Chen W, Liu C, Lee C, et al.Cost-effectiveness comparison of coupler designs of wireless power transfer for electric vehicle dynamic charging[J]. Energies, 2016, 9(11): 906. [19] Rodriguez R, Dishman J M, Dickens F, et al.Modeling of two-dimensional spiral inductors[J]. IEEE Transactions on Components Hybrids & Manufacturing Technology, 1980, 3(4): 535-541. [20] Tavakkoli H, Abbaspour-Sani E, Khalilzadegan A, et al.Analytical study of mutual inductance of hexagonal and octagonal spiral planer coils[J]. Sensors & Actuators A Physical, 2016, 247: 53-64. [21] Zhong W X.Maximum energy efficiency tracking for wireless power transfer systems[J]. IEEE Transa- ctions on Power Electronics, 2015, 30(7): 4025-4034. [22] Mai Ruikun, Liu Yeran, Li Yong, et al.An active rectifier based maximum efficiency tracking method using an additional measurement coil for wireless power transfer[J]. IEEE Transactions on Power Electronics, 2017, 33(1): 716-728.
2018, Vol. 33 
