In this paper, three viable multilayer rectangular coil structures, namely the spiral, concentrated and uneven compound types, are proposed and analyzed. In the multiple-receiver multiple-frequency wireless power transfer system, the compact coil topologies are particularly preferable and should fulfill the required performance of magnetic field with the compact size design. In order to minimize the variation of magnetic fields that can be picked up by multiple receivers, the uneven compound type is newly derived by combining the merits of both the spiral and concentrated types. Because of providing more uniform magnetic flux density distribution, the uneven compound type can achieve better tolerance of misalignment. Without any misalignment, its transmission efficiency can reach up to 92%. Moreover, their electric potential distributions are analyzed to provide guidance for the maximum input current at the desired operation frequency. Both finite element analysis and experimental results are given to verify the validity of the proposed coil structures.
2. Robichaud, A., M. Boudreault, and D. Deslandes, "Theoretical analysis of resonant wireless power transmission links composed of electrically small loops," Progress In Electromagnetics Research, Vol. 143, 485-501, 2013.
doi:10.2528/PIER13102306
3. Jang, B.-J., S. Lee, and H. Yoon, "HF-band wireless power transfer system: Concept, issues, and design," Progress In Electromagnetics Research, Vol. 124, 211-231, 2012.
doi:10.2528/PIER11120511
4. Park, S. I., "Ehancement of wireless power transmission into biological tissues using a high surface impedance ground plane," Progress In Electromagnetics Research, Vol. 135, 123-136, 2013.
doi:10.2528/PIER12110902
5. Jiang, C., K. T. Chau, C. Liu, and C. H. T. Lee, "An overview of resonant circuits for wireless power transfer ," Energies, Vol. 10, No. 7, 894:1–20, Jun. 2017.
6. Zhang, Z., H. Pang, A. Georgiadis, and C. Cecati, "Wireless power transfer --- An overview," IEEE Transactions on Industrial Electronics, 2018, doi: 10.1109/TIE.2018.2835378.
7. Mi, C. C., G. Buja, S. Y. Choi, and C. T. Rim, "Modern advances in wireless power transfer systems for roadway powered electric vehicles," IEEE Transactions on Industrial Electronics, Vol. 63, No. 10, 6533-6545, Oct. 2016.
doi:10.1109/TIE.2016.2574993
8. Zhang, Z. and K. T. Chau, "Homogeneous wireless power transfer for move-and-charge," IEEE Transactions on Power Electronics, Vol. 30, No. 11, 6213-6220, Nov. 2015.
doi:10.1109/TPEL.2015.2414453
9. Poon, A. S. Y., "A general solution to wireless power transfer between two circular loop," Progress In Electromagnetics Research, Vol. 148, 171-182, 2014.
doi:10.2528/PIER14071201
10. Kim, J., W.-S. Choi, and J. Jeong, "Loop switching technique for wireless power transfer using magnetic resonance coupling," Progress In Electromagnetics Research, Vol. 138, 197-209, 2013.
doi:10.2528/PIER13012118
11. Jiang, C., K. T. Chau, C. Liu, and W. Han, "Design and analysis of wireless switched reluctance motor drives," IEEE Transactions on Industrial Electronics, 2018, doi: 10.1109/TIE.2018.2829684.
12. Han, W., K. T. Chau, Z. Zhang, and C. Jiang, "Single-source multiple-coil homogeneous induction heating," IEEE Transactions on Magnetics, Vol. 53, No. 11-7207706:1-6, Nov. 2017.
13. Jiang, C., K. T. Chau, Y. Y. Leung, C. Liu, C. H. T. Lee, and W. Han, "Design and analysis of wireless ballastless fluorescent lighting," IEEE Transactions on Industrial Electronics, 2017, doi: 10.1109/TIE.2017.2784345.
14. Li, C. J. and H. Ling, "Investigation of wireless power transfer using planarized, capacitor-loaded coupled loops," Progress In Electromagnetics Research, Vol. 148, 223-231, 2014.
doi:10.2528/PIER14071705
15. Fan, Y., L. Li, S. Yu, C. Zhu, and C.-H. Liang, "Experimental study of efficient wireless power transfer system integrating with highly sub-wavelength metamaterials," Progress In Electromagnetics Research, Vol. 141, 769-784, 2013.
doi:10.2528/PIER13061711
16. El Badawe, M. and O. M. Ramah, "Efficient metasurface rectenna for electromagnetic wireless power transfer and energy harvesting," Progress In Electromagnetics Research, Vol. 161, 35-40, 2018.
17. Zhang, Z., K. T. Chau, C. Liu, C. Qiu, and T. W. Ching, "A positioning-tolerant wireless charging system for roadway-powered electric vehicles," Journal of Applied Physics, Vol. 117, 17B520:1-4, 2015.
doi:10.1063/1.4915337
18. Chau, K.-T., C. Jiang, W. Han, and C. H. T. Lee, "State-of-the-art electromagnetics research in electric and hybrid vehicles," Progress In Electromagnetics Research, Vol. 159, 139-157, 2017.
doi:10.2528/PIER17090407
19. Zhang, Z., K. T. Chau, C. Qiu, and C. Liu, "Energy encryption for wireless power transfer," IEEE Transactions on Power Electronics, Vol. 30, No. 9, 5237-5246, Sep. 2015.
doi:10.1109/TPEL.2014.2363686
20. Ahn, D. and S. Hong, "A study on magnetic field repeater in wireless power transfer," IEEE Transactions on Industrial Electronics, Vol. 60, No. 1, 360-371, Jan. 2013.
doi:10.1109/TIE.2012.2188254
21. Huang, S., Z. Li, Y. Li, X. Yuan, and S. Cheng, "A comparative study between novel and conventional four-resonator coil structures in wireless power transfe," IEEE Transactions on Magnetics, Vol. 50, No. 11, 1-4, Nov. 2014.
22. Jiang, C., K. T. Chau, C. Liu, and W. Han, "Wireless DC motor drives with selectability and controllability," Energies, Vol. 10, No. 1, 49:1-15, Jan. 2017.
23. Jiang, C., K. T. Chau, T. W. Ching, C. Liu, and W. Han, "Time-division multiplexing wireless power transfer for separately excited DC motor drives," IEEE Transactions on Magnetics, Vol. 53, No. 11, 1-5, Nov. 2017.
doi:10.1109/TMAG.2017.2695656
24. Qiu, C., K. T. Chau, C. Liu, T. W. Ching, and Z. Zhang, "Modular inductive power transmission system for high misalignment electric vehicle application," Journal of Applied Physics, Vol. 117, No. 17, 17B528:1-4, Apr. 2015.
25. Casanova, J. J., Z. N. Low, and J. Lin, "A loosely coupled planar wireless power system for multiple receivers ," IEEE Transactions on Industrial Electronics, Vol. 56, No. 8, 3060-3068, Aug. 2009.
doi:10.1109/TIE.2009.2023633
26. Qiu, C., K. T. Chau, C. Liu, W. Li, and F. Lin, "Quantitative comparison of dynamic flux distribution of magnetic couplers for roadway electric vehicle wireless charging system," Journal of Applied Physics, Vol. 115, No. 17, 17A334:1-3, May 2014.
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