volume | PIER Journals

Abstract

In wireless power transfer (WPT) systems, the horizontal misalignment between coils and variations in the load result in significant fluctuations in the transmission efficiency of the system. In this paper, a reverse series triple coil (RTC) structure is proposed. The RTC structure offers improved resistance to deflection in the direction of vehicle motion because of the magnetic field interaction of the reverse series coils. This adjustment helps maintain a more stable system transmission efficiency when the coils are deflected. At the same time, when the load resistance varies within a certain range, the system's transmission efficiency remains almost unchanged. This is because the addition of relay coils makes the system more adaptable to load changes and improves the system's load compatibility. The experimental results indicate that the RTC structure corresponds to 300% of the load variation range of the conventional reverse series dual-coil structure, within the range where the system transmission efficiency is not less than 95%, in the load variation range that satisfies the load equivalent resistance from 15 Ω to 68 Ω. During the offset process, the maximum system transmission efficiency fluctuation rate is 1.19% for a distance of 55% of the core width of the offset transmitting coil on the horizontal Y-axis, and the maximum efficiency reaches as high as 97.26%.

1. Yan, Hua, Yunfei Chen, and Shuang-Hua Yang, "UAV-enabled wireless power transfer with base station charging and UAV power consumption," IEEE Transactions on Vehicular Technology, Vol. 69, No. 11, 12883-12896, 2020. Google Scholar

2. Triviño, Alicia, "Wireless power transfer technologies applied to electric vehicles: A review," Energies, Vol. 14, No. 6, 1547, 2021. Google Scholar

3. Cirimele, Vincenzo, Riccardo Torchio, Juan Luis Villa, Fabio Freschi, Piergiorgio Alotto, Lorenzo Codecasa, and Luca Di Rienzo, "Uncertainty quantification for SAE J2954 compliant static wireless charge components," IEEE Access, Vol. 8, 171489-171501, 2020. Google Scholar

4. Cirimele, Vincenzo, Jacopo Colussi, Juan Luis Villa, Alessandro La Ganga, and Paolo Guglielmi, "Modelling of a 100 kW-85 kHz three-phase system for static wireless charging and comparison with a classical single-phase system," 2020 IEEE International Symposium on Circuits and Systems (ISCAS), 1-5, 2020.

5. Zhang, Yiming, Shuxin Chen, Xin Li, and Yi Tang, "Design of high-power static wireless power transfer via magnetic induction: An overview," CPSS Transactions on Power Electronics and Applications, Vol. 6, No. 4, 281-297, 2021. Google Scholar

6. Bagchi, Anindya Chitta, Abhilash Kamineni, Regan Andrew Zane, and Richard Carlson, "Review and comparative analysis of topologies and control methods in dynamic wireless charging of electric vehicles," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 9, No. 4, 4947-4962, 2021. Google Scholar

7. Tan, Linlin, Wenxuan Zhao, Han Liu, Jiacheng Li, and Xueliang Huang, "Design and optimization of ground-side power transmitting coil parameters for EV dynamic wireless charging system," IEEE Access, Vol. 8, 74595-74604, 2020. Google Scholar

8. Cai, Changsong, Maryam Saeedifard, Junhua Wang, Pengcheng Zhang, Jiansong Zhao, and Yunshan Hong, "A cost-effective segmented dynamic wireless charging system with stable efficiency and output power," IEEE Transactions on Power Electronics, Vol. 37, No. 7, 8682-8700, 2022. Google Scholar

9. Li, Zhongqi, Xinbo Xiong, Liquan Ren, Pengsheng Kong, Yang Zhang, and Junjun Li, "Design and optimization of quasi-constant coupling coefficients for superimposed dislocation coil structures for dynamic wireless charging of electric vehicles," Progress In Electromagnetics Research M, Vol. 116, 23-38, 2023. Google Scholar

10. Duong, Thuc Phi and Jong-Wook Lee, "A dynamically adaptable impedance-matching system for midrange wireless power transfer with misalignment," Energies, Vol. 8, No. 8, 7593-7617, 2015. Google Scholar

11. Yuan, Zhaoyang, Qingxin Yang, Xian Zhang, Xianjie Ma, Ran Wang, Ming Xue, and Pengcheng Zhang, "A misalignment tolerate integrated S-S-S-compensated WPT system with constant current output," Energies, Vol. 16, No. 6, 2798, 2023. Google Scholar

12. Li, Zhongqi, Min Zhang, Shoudao Huang, and Jiliang Yi, "Design and optimization of structure of tower-type coil in wireless charging system for electric vehicles," Progress In Electromagnetics Research B, Vol. 85, 85-101, 2019. Google Scholar

13. Zhuang, T. and Y. Yao, "A ddq/dd-coupler-based wireless power transfer system for electric vehicles charging featuring high misalignment tolerance," Proceedings of the CSEE, Vol. 42, 5675-5684, 2022.

14. Shi, H. and W. Li, "Research on coil parameter optimization and misalignment characteristics of wireless charging system," Journal of Hefei University of Technology (Natural Science), Vol. 44, No. 9, 1179-1186, 2021. Google Scholar

15. Shi, Ke, Chunsen Tang, Hao Long, Xingchu Lv, Zhihui Wang, and Xiaofei Li, "Power fluctuation suppression method for EV dynamic wireless charging system based on integrated magnetic coupler," IEEE Transactions on Power Electronics, Vol. 37, No. 1, 1118-1131, 2022. Google Scholar

16. Jie, R. and Y. Liu, "Study on anti-misalignment inductive power transfer system based on parameter optimized method," Proceedings of the CSEE, Vol. 39, 1452-1460, 2019. Google Scholar

17. Mai, Jianwei, Yijie Wang, Yousu Yao, and Dianguo Xu, "Analysis and design of high-misalignment-tolerant compensation topologies with constant-current or constant-voltage output for IPT systems," IEEE Transactions on Power Electronics, Vol. 36, No. 3, 2685-2695, 2021. Google Scholar

18. Cheng, S. and Y. Wang, "Anti-misalignment characteristics of wireless charging magnetic coupler with large relay coil," Electric Power Automation Equipment, Vol. 43, 213-219, 2023. Google Scholar

19. Bui, Dai, Qi Zhu, Lei Zhao, and Aiguo Patrick Hu, "Concentric-coil hybrid IPT system with improved tolerance to coupling and load variations," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 10, No. 4, 4913-4922, 2022. Google Scholar

20. Lu, Yuanfang, Bin Yang, Shuangjiang He, Yuner Peng, Tianqi Lyu, Ruikun Mai, and Yang Chen, "Design of compensation topology for IPT system considering coils’ parameters and load variations for CC or CV output," IEEE Transactions on Transportation Electrification, Vol. 10, No. 1, 1583-1595, 2023. Google Scholar

21. Li, Z. and S. Li, "Mutual inductance calculation and optimization of multi-receiver positive and negative series coil structure in dynamic wireless power transfer systems," Transactions of China Electrotechnical Society, Vol. 36, 5153–5164, 2021. Google Scholar

22. Yıldırız, Emin, "Optimal design with generalized inductance calculation for IPTs using a spiral rectangular coil pair," Electric Power Components and Systems, Vol. 50, No. 19-20, 1212-1222, 2022. Google Scholar

23. Zhang, Yiming, Zhiwei Shen, Wenbin Pan, Hui Wang, Yuanchao Wu, and Xingkui Mao, "Constant current and constant voltage charging of wireless power transfer system based on three-coil structure," IEEE Transactions on Industrial Electronics, Vol. 70, No. 1, 1066-1070, 2023. Google Scholar

24. Luo, B. and W. Li, "Cross-coupling effects and reactance compensation for radio energy transmission in magnetically coupled resonant triple coils," Electric Power Automation Equipment, Vol. 39, 105-112, 2015. Google Scholar

Dr. Xiaohua Shu

Mr. Jianbin Wang

Mr. Chenxi Zhang

Dr. Zhongqi Li