Abstract：In the inductive power transfer (IPT) system, either the mutual inductance or the self-inductance will drift as the airgap variation of the electromagnetic coupling mechanism with magnetic core between the primary coil and secondary coil. Then, the required capacity of the source will increase and the efficiency of the overall system will decrease because of the detuning state of IPT system. In order to overcome this detuning problem, a dynamic tuning method is proposed in this paper to track the resonance of IPT system. Through tracking the minimum current ratio of primary coil and DC source as well as adjusting the frequency of IPT system dynamically by the controller, the system performance can be improved accordingly. Finally, various experiments are conducted against different airgaps between the primary side and the secondary side by a prototype setup. The test results show that IPT system can return back to resonance with different airgaps by the proposed method. Moreover, the required capacity of the DC source is limited, and the efficiency of the overall system increases up to 1.64%.
麦瑞坤, 徐丹露, 杨鸣凯, 何正友. 基于最小电流比值的IPT系统频率跟踪的动态调谐方法[J]. 电工技术学报, 2018, 33(6): 1276-1284.
Mai Ruikun, Xu Danlu, Yang Mingkai, He Zhengyou. Dynamic Tuning Method of Frequency Tracking Based on the Minimum Current Ratio for IPT System. Transactions of China Electrotechnical Society, 2018, 33(6): 1276-1284.
[1] 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. [2] 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): 1-9. Huang Xueliang, Tan Linlin, Chen Zhong, et al.Review and research progress on wireless power transfer technology[J]. Transactions of China Elec- trotechnical Society, 2013, 28(10): 1-9. [3] 李阳, 杨庆新, 闫卓, 等. 无线电能有效传输距离及其影响因素分析[J]. 电工技术学报, 2013, 28(1): 106-112. Li Yang, Yang Qingxin, Yan Zhuo, et al.Analysis on effective range of wireless power transfer and its impact factors[J]. Transactions of China Electro- technical Society, 2013, 28(1): 106-112. [4] 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 Qinxin, 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. [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, 31(2): 1-12. [6] 宋凯, 朱春波, 李阳, 等. 基于磁耦合谐振的自主无线充电机器人系统设计[J]. 电工技术学报, 2014, 29(9): 38-43. Song Kai, Zhu Chunbo, Li Yang, et al.Design and implementation of an autonomous wireless charging robot system using magnetically coupled resonance[J]. Transactions of China Electrotechnical Society, 2014, 29(9): 38-43. [7] 赵俊锋, 黄学良. 小功率无线电能传输系统应用研究[J]. 电工技术学报, 2015, 30(14): 470-474. Zhao Junfeng, Huang Xueliang.Application research of low-power wireless power transmission system[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 470-474. [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] 陈琛, 黄学良, 谭林林, 等. 电动汽车无线充电时的电磁环境及安全评估[J]. 电工技术学报, 2015, 30(19): 61-67. Chen Chen, Huang Xueliang, Tan Linlin, et al.Electromagnetic environment and security evaluation for wireless charging of electric vehicles[J]. Transa- ctions of China Electrotechnical Society, 2015, 30(19): 61-67. [10] Sallan J, Villa J L, Llombart A, et al.Optimal design of ICPT systems applied to electric vehicle battery charge[J]. IEEE Transactions on Industrial Elec- tronics, 2009, 56(6): 2140-2149. [11] 戴卫力, 费峻涛, 肖建康, 等. 无线电能传输技术综述及应用前景[J]. 电气技术, 2010, 11(7): 1-6. Dai Weili, Fei Juntao, Xiao Jiankang, et al.An overview and application prospect of wireless power transmission technology[J]. Electrical Engineering, 2010, 11(7): 1-6. [12] 马玲玲, 杨军, 付聪, 等. 电动汽车充放电对电网影响研究综述[J]. 电力系统保护与控制, 2013, 41(3): 140-148. Ma Lingling, Yang Jun, Fu Cong, et al.Review on impact of electric car charging and discharging on power grid[J]. Power System Protection and Control, 2013, 41(3): 140-148. [13] Zhong W X, Hui S Y R. Maximum energy efficiency tracking for wireless power transfer systems[J]. IEEE Transactions on Power Electronics, 2015, 30(7): 4025-4034. [14] 范兴明, 莫小勇, 张鑫. 无线电能传输技术的研究现状与应用[J]. 中国电机工程学报, 2015, 28(12): 75-82. Fan Xingming, Mo Xiaoyong, Zhang Xin.Research status and application of wireless power transfer via coupled magnetic resonances[J]. Proceedings of the CSEE, 2015, 28(12): 75-82. [15] 孙跃, 王智慧, 戴欣, 等. 非接触电能传输系统的频率稳定性研究[J]. 电工技术学报, 2005, 20(11): 56-59. Sun Yue, Wang Zhihui, Dai Xin, et al.Study of frequency stability of contactless power transmission system[J]. Transactions of China Electrotechnical Society, 2005, 20(11): 56-59. [16] 苏玉刚, 唐春森, 孙跃, 等. 非接触供电系统多负载自适应技术[J]. 电工技术学报, 2009, 24(1): 153-157. Su Yugang, Tang Chunsen, Sun Yue, et al.Load adaptive technology of contactless power transfer system[J]. Transactions of China Electrotechnical Society, 2009, 24(1): 153-157. [17] Lim Y, Tang H, Lim S, et al.An adaptive impedance-matching network based on a novel capacitor matrix for wireless power transfer[J]. IEEE Transactions on Power Electronics, 2014, 29(8): 4403-4413. [18] Namadmalan A.Self-oscillating tuning loops for series resonant inductive power transfer systems[J]. IEEE Transactions on Power Electronics, 2016, 31(10): 7320-7327. [19] 戴欣, 周继昆, 孙跃. 基于谐振电容阵列的CPT系统输出控制方法[J]. 电子科技大学学报, 2012, 41(5): 729-734. Dai Xin, Zhou Jikun, Sun Yue.Study on output voltage stability of CPT system based on resonant capacitor array[J]. Journal of University of Electronic Science and Science and Technology of China, 2012, 41(5): 729-734. [20] 麦瑞坤, 陆立文, 李勇, 等. 一种采用最小电压与最大电流跟踪的IPT系统动态调谐方法[J]. 电工技术学报, 2015, 30(19): 32-38. Mai Ruikun, Lu Liwen, Li Yong, et al.Dynamic resonant compensation approach based on minimum voltage and maximum current tracking for IPT system[J]. Transactions of China Electrotechnical Society, 2015, 30(19): 32-38. [21] 强浩, 黄学良, 谭林林, 等. 基于动态调谐实现感应耦合无线电能传输系统的最大功率传输[J]. 中国科学: 技术科学, 2012, 42(7): 830-837. Qiang Hao, Huang Xueliang, Tan Linlin, et al.Achieving maximum power transfer of inductively coupled wireless power transfer system based on dynamic tuning control[J]. Science China: Techno- logical Sciences, 2012, 42(7): 830-837. [22] 何正友, 李勇, 麦瑞坤, 等. 考虑阻感性负载IPT系统的动态补偿技术[J]. 西南交通大学学报, 2014, 49(4): 569-575. He Zhengyou, Li Yong, Mai Ruikun, et al.Dynamic compensation strategy of inductive power transfer system with inductive-resistive load[J]. Journal of Southwest Jiaotong University, 2014, 49(4): 569-575. [23] Sohn Y H, Choi, B H, Lee E S, et al. General unified analyses of two-capacitor inductive power transfer systems: equivalence of current-source SS and SP compensations[J]. IEEE Transactions on Power Electronics, 2015, 30(11): 6030-6045. [24] Erickson R W, Dragan M.Fundamentals of power electronics[M]. New York: Kluwer Academic Publi- shers, 2001. [25] 代小磊, 牛王强, 猛祥成. 非接触电能传输(CPT)系统频率分裂现象分析[J]. 电源学报, 2012, 41(3): 67-71. Dai Xiaolei, Niu Wangqiang, Meng Xiangcheng.Analysis of the frequency splitting phenomenon in contactless power transfer systems[J]. Journal of Power Supply, 2012, 41(3): 67-71. [26] Youndo T, Jongmin P, Sangwook N.Mode-based analysis of resonant characteristics for near-field coupled small antennas[J]. IEEE Antennas and Wireless Propagation Letters, 2009, 8(4): 1238-1241.
2018, Vol. 33 
