Optimal Setting of Primary Coil Current for Efficiency in Electromagnetic Inductive Wireless Power Transfer System
Yin Zhenggang, Shi Liming, Fan Manyi
Key Laboratory of Power Electronics and Electric Drives of Chinese Academy of Science Institute of Electrical Engineering Chinese Academy of Science Beijing 100190 China
Abstract：The electromagnetic inductive wireless power transfer system including many secondary pick-ups can realize the decoupling control of pick-ups by keeping the primary coil current constant. When the pick-ups control their outputs by DC-DC regulators, the primary track current can be set flexibly within certain range, which offers the potential to optimize the efficiency. In this paper the quantitative relationship between the primary coil current and the efficiency of the electromagnetic coupling mechanism is deduced, and the optimal current for the maximum efficiency is found out. Based on the system parameters, the efficiencies under different primary currents are calculated. Simulation system and experimental platform are both set up. The measured efficiencies in simulation system are the same as the calculated efficiencies. The measured efficiency waveforms and the maximum efficiency point of the experimental platform are essentially consistent with that of the calculation and simulation system. So the effectiveness of the primary coil current optimization method for increasing the efficiency of the coupling mechanism of electromagnetic inductive wireless power transfer system is proved.
殷正刚, 史黎明, 范满义. 电磁感应式无线电能传输系统一次电流效率优化配置[J]. 电工技术学报, 2021, 36(zk1): 46-53.
Yin Zhenggang, Shi Liming, Fan Manyi. Optimal Setting of Primary Coil Current for Efficiency in Electromagnetic Inductive Wireless Power Transfer System. Transactions of China Electrotechnical Society, 2021, 36(zk1): 46-53.
[1] Shi Liming, Yin Zhenggang, Jiang Longbin, et al.Advances in inductively coupled power transfer technology for rail transit[J]. CES Transactions on Electrical Machines and Systems, 2017, 1(4): 383-396. [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): 1-11. 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): 1-11. [3] Chen Liang Jerry, Boys John T, Covic Grant A.Power management for multiple-pickup IPT systems in materials handling applications[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2014, 3(1): 163-176. [4] 赵争鸣, 刘方, 陈凯南. 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 pro- gress of wireless charging technology for electric vehicles[J]. Transactions of China Electrotechnical Society, 2016, 31(20): 30-40. [5] 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. [6] Mi Chunting Chris, Buja Giuseppe, Choi Su Y, et al.Modern advances in wireless power transfer systems for roadway powered electric vehicles[J]. IEEE Transactions on Industrial Electronics, 2016, 63(10): 6533-6545. [7] Kim Jae Hee, Lee Byung-Song, Lee Jun-Ho, et al.Development of 1MW inductive power transfer system for a high-speed train[J]. IEEE Transactions on Industrial Electronics, 2015, 62(10): 6242-6250. [8] 耿宇宇, 杨中平, 林飞, 等. 用于混合储能系统供电的无线电能传输技术效率优化策略研究[J]. 电工技术学报, 2019, 34(增刊1): 424-432. Geng Yuyu, Yang Zhongping, Lin Fei, et al.Efficiency optimization strategy for wireless power transfer used in hybrid energy storage system[J]. Transactions of China Electrotechnical Society, 2019, 34(S1): 424-432. [9] 戴欣, 孙跃, 苏玉刚, 等. 非接触电能双向推送模式研究[J]. 中国电机工程学报, 2010, 30(18): 55-61. Dai Xin, Sun Yue, Su Yugang, et al.Study on contactless power bi-directional push mode[J]. Pro- ceedings of the CSEE, 2010, 30(18): 55-61. [10] Jiseong Kim, Jonghoon Kim, Sunkyu Kong, et al.Coil design and shielding methods for a magnetic resonant wireless power transfer system[J]. Pro- ceedings of the IEEE, 2013, 101(6): 1332-1342. [11] 王智慧, 胡超, 孙跃, 等. 基于输出能效特性的IPT系统磁耦合机构设计[J]. 电工技术学报, 2015, 30(19): 26-31. Wang Zhihui, Hu Chao, Sun Yue, et al.Design of magnetic coupler for inductive power transfer system based on output power and efficiency[J]. Transa- ctions of China Electrotechnical Society, 2015, 30(19): 26-31. [12] 范满义, 史黎明, 殷正刚, 等. 感应电能传输系统基于阶梯波合成技术的谐波消除和脉冲密度功率调节方法[J]. 中国电机工程学报, 2017, 37(22): 75-82, 322. Fan Manyi, Shi Liming, Yin Zhenggang, et al.Harmonic elimination and power regulation with pulse density modulation based on staircase wave- form for multilevel inverters in inductive power transfer system[J]. Proceedings of the CSEE, 2017, 37(22): 75-82, 322. [13] Fan Manyi, Shi Liming, Yin Zhenggang, et al.Improved pulse density modulation for semi- bridgeless active rectifier in inductive power transfer system[J]. IEEE Transactions on Power Electronics, 2018, 34(6): 5893-5902. [14] 蔡华, 史黎明, 李勇, 等. 基于谐波移相闭环控制的无线电能传输技术[J]. 电工技术学报, 2018, 33(增刊1): 1-8. Cai Hua, Shi Liming, Li Yong, et al.The closed-loop control of harmonic based phase-shifted control in wireless power transmission[J]. Transactions of China Electrotechnical Society, 2018, 33(S1): 1-8. [15] Barth D, Klaus B, Leibfried T.Litz wire design for wireless power transfer in electric vehicles[C]//2017 IEEE Wireless Power Transfer Conference (WPTC), Taipei, China, 2017: 1-4. [16] 麦瑞坤, 刘野然, 陈阳. 基于最优等效负载控制的感应电能传输系统效率优化方法研究[J]. 中国电机工程学报, 2016, 36(23): 167-174, 312. Mai Ruikun, Liu Yeran, Chen Yang.Studies of efficiency optimization methods based on optimal equivalent load control in IPT systems[J]. Pro- ceedings of the CSEE, 2016, 36(23): 167-174, 312. [17] Li Hongchang, Fang Jingyang, Chen Shuxin, et al.Pulse density modulation for maximum efficiency point tracking of wireless power transfer systems[J]. IEEE Transactions on Power Electronics, 2017, 33(6): 5492-5501. [18] Dai Xin, Li Xiaofei, Li Yanling, et al.Maximum efficiency tracking for wireless power transfer systems with dynamic coupling coefficient estimation[J]. IEEE Transactions on Power Electronics, 2017, 33(6): 5005-5015. [19] Narusue Y, Kawahara Y, Asami T.Maximum efficiency point tracking by input control for a wireless power transfer system with a switching voltage regulator[C]//2015 IEEE Wireless Power Transfer Conference (WPTC), Boulder, USA, 2015: 1-4. [20] Yeo Tae-Dong, Kwon Duk-Soo, Khang Seung-Tae, et al.Design of maximum efficiency tracking control scheme for closed-loop wireless power charging system employing series resonant tank[J]. IEEE Transactions on Power Electronics, 2016, 32(1): 471-478. [21] 刘方, 陈凯楠, 蒋烨, 等. 双向无线电能传输系统效率优化控制策略研究[J]. 电工技术学报, 2019, 34(5): 891-901. Liu Fang, Chen Kainan, Jiang Ye, et al.Research on the overall efficiency optimization of the bidirectional wireless power transfer system[J]. Transactions of China Electrotechnical Society, 2019, 34(5): 891-901. [22] Lee Jun-Ho, Lee Byung-Song, Lee Seung-Hwan, et al.A study on the control of output current to respond to the load changes of the wireless power transfer[C]// 2015 IEEE Transportation Electrification Conference and Expo (ITEC), Dearborn, USA, 2015: 1-4. [23] Borage M, Tiwari S, Kotaiah S.Analysis and design of an LCL-T resonant converter as a constant-current power supply[J]. IEEE Transactions on Industrial Electronics, 2005, 52(6): 1547-1554. [24] 国玉刚, 崔纳新. LCC-S型无线电能传输系统优化配置及特性研究[J]. 电工技术学报, 2019, 34(18): 3723-3731. Guo Yugang, Cui Naxin.Research on optimal con- figuration and characteristics based on LCC-S type wireless power transfer system[J]. Transactions of China Electrotechnical Society, 2019, 34(18): 3723-3731.
2021, Vol. 36 
