volume | PIER Journals

Abstract

Offsets in the coupling mechanism and load fluctuations usually lead to instability in the output voltage of wireless power transfer (WPT) systems. Therefore, accurate and rapid identification of the mutual inductance and load parameters of the system is crucial for achieving stable output control for communication-free WPT systems. In this paper, a method based on the joint real-time identification of both mutual inductance and load parameters is proposed. By measuring the primary inverter current and the current on the shunt compensation capacitor, two current equations about the mutual inductance and load resistance are constructed, in which only the RMS values of the above two currents need to be determined. The traditional equations are too slow to be solved, and the amount of computation is too large; therefore, this paper combines this method with particle swarm algorithm, which transforms the problem of the system parameter identification into a function optimization problem. Through this method, the identification results of mutual inductance and load resistance can be obtained in real time, and then the conduction angle of the inverter can be calculated quickly to realize the constant voltage output control. Finally, a wireless power transmission experimental platform is built, and in the experiment, the recognition accuracy of mutual inductance and load reaches more than 96.7% and 96.4%, respectively, which verifies the feasibility and practicality of the design.

1. Yang, Lin, Kangshuai Dong, Yilin Wang, Changsong Cai, and Xuebin Zhou, "Analysis, design, and validation of a dual-channel high-power WPT system based on bilateral coil decoupling," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 12, No. 4, 4288-4295, Aug. 2024.

2. Jia, Yahui, Lei Zhao, Zhihui Wang, Chunsen Tang, Fengwei Chen, and Hui Feng, "Integrated LCC-LCC topology for WPT system with CC output regarding air gap and load variations," IEEE Transactions on Power Electronics, Vol. 39, No. 10, 11904-11915, Oct. 2024.

3. Hu, Jianghao, Jiankang Zhao, and Fei Gao, "A real-time maximum efficiency tracking for wireless power transfer systems based on harmonic-informatization," IEEE Transactions on Power Electronics, Vol. 38, No. 1, 1275-1287, Jan. 2023.

4. Liu, J., J. Huang, R. Sun, H. Yu, and R. Xiao, "Data fusion for multi-source sensors using GA-PSO-BP neural network," IEEE Transactions on Intelligent Transportation Systems, Vol. 22, No. 10, 6583-6598, Oct. 2021.
doi:10.1109/TITS.2020.3010296

5. Kamel, M. A., X. Yu, and Y. Zhang, "Real-time fault-tolerant formation control of multiple WMRs based on hybrid GA-PSO algorithm," IEEE Transactions on Automation Science and Engineering, Vol. 18, No. 3, 1263-1276, Jul. 2021.
doi:10.1109/TASE.2020.3000507

6. Yousaf, S., A. Mughees, M. G. Khan, A. A. Amin, and M. Adnan, "A comparative analysis of various controller techniques for optimal control of smart nano-grid using GA and PSO algorithms," IEEE Access, Vol. 8, 205696-205711, 2020.
doi:10.1109/ACCESS.2020.3038021

7. Cai, Jin, Xusheng Wu, Pan Sun, Qijun Deng, Jun Sun, and Hang Zhou, "Design of constant-voltage and constant-current output modes of double-sided LCC inductive power transfer system for variable coupling conditions," IEEE Transactions on Power Electronics, Vol. 39, No. 1, 1676-1689, Jan. 2024.

8. Li, Zhenjie, Hao Liu, Yuhong Tian, and Yiqi Liu, "Constant current/voltage charging for primary-side controlled wireless charging system without using dual-side communication," IEEE Transactions on Power Electronics, Vol. 36, No. 12, 13562-13577, Dec. 2021.

9. Wei, Yuchen, Fengjiang Wu, Siwei Wu, and Hongchen Liu, "Three-phase electrolytic-capacitor-LCC-S WPT system with wide operation range," IEEE Transactions on Power Electronics, Vol. 39, No. 9, 11803-11813, Sep. 2024.

10. Wang, Jigang, Song Yu, Yilang Huang, Baisen Lin, Guolong Liang, Xinhao Xie, and Congzhen Xie, "Communication-free long-distance wireless charging system for battery load with adaptive switching of constant voltage and constant current," IEEE Transactions on Transportation Electrification, Vol. 10, No. 2, 2653-2662, Jun. 2024.

11. Liu, Zhimeng, Lifang Wang, Yanjie Guo, and Shufan Li, "Primary-side linear control for constant current/voltage charging of the wireless power transfer system based on the LCC-N compensation topology," IEEE Transactions on Industrial Electronics, Vol. 69, No. 9, 8895-8904, Sep. 2022.

12. Wang, Lei, Pan Sun, Yan Liang, Jun Sun, Xusheng Wu, Haomin Shen, and Qijun Deng, "Joint real-time identification for mutual inductance and load charging parameters of IPT system," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 11, No. 4, 4574-4590, Aug. 2023.

13. Zeng, Junming, Jiayang Wu, Kerui Li, Yun Yang, and Shu Yuen Ron Hui, "Dynamic monitoring of battery variables and mutual inductance for primary-side control of a wireless charging system," IEEE Transactions on Industrial Electronics, Vol. 71, No. 7, 7966-7974, Jul. 2024.

14. Wu, Xiaorui, Shaonan Chen, Jiejun Huang, Jing Xiao, and Qianyi Chen, "A wide coupling range UAV WPT system based on voltage regulation and phase shift control strategy," 2024 IEEE 2nd International Conference on Image Processing and Computer Applications (ICIPCA), 135-140, Shenyang, China, 2024.

15. Wei, Zhihao, Bo Zhang, Xujian Shu, and Chao Rong, "A wireless power transfer system with hybrid control for constant current and voltage output," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 10, No. 5, 6317-6331, Oct. 2022.

16. Li, Xiaofei, Heshou Wang, Fan Zheng, Xin Dai, Yue Sun, and Aiguo Patrick Hu, "Wireless charging of substation inspection robots based on parameter estimation without communication," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 71, No. 2, 907-911, Feb. 2024.

17. Wei, Yuchen and Fengjiang Wu, "Indirect control strategy of secondary current for LCC-series compensated wireless power transfer system based on primary current closed-loop control," IEEE Transactions on Transportation Electrification, Vol. 8, No. 2, 1553-1565, Jun. 2022.

18. Yenil, Veli and Sevilay Cetin, "An improved pulse density modulation control for secondary side controlled wireless power transfer system using LCC-S compensation," IEEE Transactions on Industrial Electronics, Vol. 69, No. 12, 12762-12772, Dec. 2022.

19. Ji, Li, Ming Zhang, Buren Qian, and Hongjun Sun, "A series of hybrid WPT systems with automatic switching between constant-current and constant-voltage modes on the secondary side," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 11, No. 1, 361-371, Feb. 2023.

20. Zhang, Ming, Linlin Tan, Jiacheng Li, and Xueliang Huang, "The charging control and efficiency optimization strategy for WPT system based on secondary side controllable rectifier," IEEE Access, Vol. 8, 127993-128004, 2020.

21. Guo, Yanjie and Yuwang Zhang, "Secondary side voltage and current estimation of wireless power transfer systems," IEEE Transactions on Industry Applications, Vol. 58, No. 1, 1222-1230, Jan.-Feb. 2022.

22. Zheng, Kangxing, Jingzhi Ren, and Wenxing Zhong, "A soft-switching secondary-side control method without AC current detection for wireless power transfer systems," IEEE Transactions on Power Electronics, Vol. 40, No. 2, 3785-3797, Feb. 2025.

23. Yenil, Veli, "A wireless power transfer system with high misalignment tolerance based on dual side variable inductor control," IEEE Access, Vol. 12, 134937-134947, 2024.

24. Fu, Na, Junjun Deng, Zhenpo Wang, and Deliang Chen, "Dual-phase-shift control strategy with switch-controlled capacitor for overall efficiency optimization in wireless power transfer system," IEEE Transactions on Vehicular Technology, Vol. 72, No. 6, 7304-7317, Jun. 2023.

25. Wang, Lei, Pan Sun, Yan Liang, Li He, Xusheng Wu, and Qijun Deng, "Research on the control strategy of communication-free IPT system based on multiparameter joint real-time identification," IEEE Transactions on Power Electronics, Vol. 39, No. 1, 1912-1926, Jan. 2024.

26. Gu, Yu, Jiang Wang, Zhenyan Liang, and Zhen Zhang, "Communication-free power control algorithm for drone wireless in-flight charging under dual-disturbance of mutual inductance and load," IEEE Transactions on Industrial Informatics, Vol. 20, No. 3, 3703-3714, Mar. 2024.

27. Mao, Yuan, Yun Yang, and Kaiyuan Wang, "A primary-side fixed-frequency CC and CV output control for single-stage wireless battery chargers with series compensation receivers," IEEE Transactions on Transportation Electrification, Vol. 10, No. 2, 3407-3415, Jun. 2024.

28. Li, Huang, Xin Liu, Fei Gao, Yun Zhang, and Houjun Tang, "A parameter identification approach in inductive power transfer systems for light electric vehicles," IEEE Transactions on Transportation Electrification, Vol. 10, No. 2, 2766-2776, Jun. 2024.

29. Liao, Zhi-Juan, Bin Gao, Fan Yi, Zhi-Peng Liu, Zhi-Yong Jin, and Chen-Yang Xia, "A universal mutual inductance and load identification methodology for MC-WPT systems with arbitrary topology," IEEE Transactions on Power Electronics, Vol. 39, No. 12, 16943-16954, Dec. 2024.

30. Li, Zhe and Lijuan Li, "A digital twin based real-time parameter identification for mutual inductance and load of wireless power transfer systems," IEEE Access, Vol. 11, 55404-55412, 2023.

31. Feng, Yuchen, Fengwei Chen, Yue Sun, Tao Lin, Fanbin Meng, and Hongsheng Hu, "Identification and control of LCC-S WPT systems using a linear parameter varying model," IEEE Transactions on Power Electronics, Vol. 39, No. 9, 11862-11873, Sep. 2024.

32. Liu, Yuanyuan and Hongwei Feng, "Maximum efficiency tracking control method for WPT system based on dynamic coupling coefficient identification and impedance matching network," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 8, No. 4, 3633-3643, Dec. 2020.

33. Yang, Lin, Shuai Jiang, Changqing Wang, Yanyan Shi, Meng Wang, Changsong Cai, and Li Zhang, "A high-efficiency integrated LCC/S WPT system with constant current output," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 12, No. 1, 341-354, Feb. 2024.

34. Li, Zheng, Bo Xie, Yiding Zhu, Minglei Tang, Huixian Liu, Xiaoqiang Guo, and Hexu Sun, "Wireless charging constant power output system based on LCC/SS self-switching," IEEE Access, Vol. 10, 86435-86444, 2022.

35. Chen, Yafei, Hailong Zhang, Sung-Jun Park, and Dong-Hee Kim, "A switching hybrid LCC-S compensation topology for constant current/voltage EV wireless charging," IEEE Access, Vol. 7, 133924-133935, 2019.

36. Hu, Yongguang, Xiaotian Jin, Zhi Zhang, Yongzong Lu, and Qingmin Pan, "Research on controller of fresh tea leaves grading transport speed based on AW-CPSO-Fuzzy-PID," Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery, Vol. 56, No. 4, 275-283, 2025.

Dr. Zhongjiu Zheng

Dr. Qiangqiang Zhao

Dr. Hanxi Xu

Prof. Zhengyu Xue

Dr. Yanpeng Ma