PIER M
 
Progress In Electromagnetics Research M
ISSN: 1937-8726
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 69 > pp. 207-217

DESIGN AND OPTIMIZATION OF QUASI-CONSTANT MUTUAL INDUCTANCE FOR ASYMMETRIC TWO-COIL WIRELESS POWER TRANSFER SYSTEM WITH LATERAL MISALIGNMENTS

By Z. Li, W. Cheng, J. Yi, and J. Li

Full Article PDF (523 KB)

Abstract:
Magnetic resonant wireless power transfer (WPT) is an emerging technology that may create new applications for wireless power charging. However, the output voltage fluctuations resulting from lateral misalignments are main obstructing factors for promoting this technology. In this paper, an asymmetric two-coil WPT system is presented. The mathematical model of the proposed topology with lateral misalignments is built based on equivalent circuit method. The expression of the output voltage is then derived by solving the system equivalent equations. In addition, a method of optimization parameters is proposed. The mutual inductance between the receiving coil and transmission coil is nearly constant by the proposed method with lateral misalignments. Therefore, the output voltage can be kept nearly constant. The asymmetric two-coil WPT system via magnetic resonance coupling is designed. Simulated and experimental results validating the proposed method are given.

Citation:
Z. Li, W. Cheng, J. Yi, and J. Li, "Design and Optimization of Quasi-Constant Mutual Inductance for Asymmetric Two-Coil Wireless Power Transfer System with Lateral Misalignments," Progress In Electromagnetics Research M, Vol. 69, 207-217, 2018.
doi:10.2528/PIERM18042503

References:
1. Musavi, F. and W. Eberle, "Overview of wireless power transfer technologies for electric vehicle battery charging," IET Power Electronics, Vol. 7, No. 1, 60-66, Jan. 2014.
doi:10.1049/iet-pel.2013.0047

2. Chen, J., Z. Ding, and Z. Hu, "Metamaterial-based high-efficiency wireless power transfer system at 13.56 MHz for low power applications," Progress In Electromagnetics Research B, Vol. 72, No. 1, 17-30, 2017.
doi:10.2528/PIERB16071509

3. Shaw, T., A. Roy, and D. Mitra, "Efficiency enhancement of wireless power transfer system using MNZ metamaterials," Progress In Electromagnetics Research C, Vol. 68, No. 1, 11-19, 2016.
doi:10.2528/PIERC16081101

4. Choi, S. Y., et al., "Advances in wireless power transfer systems for roadwaypowered electric vehicles," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 3, No. 1, 18-36, Aug. 2015.
doi:10.1109/JESTPE.2014.2343674

5. Li, Z., et al., "A 3-kW wireless power transfer system for sightseeing car supercapacitor charge," IEEE Transactions on Power Electronics, Vol. 32, No. 5, 3301-3316, Jun. 2017.
doi:10.1109/TPEL.2016.2584701

6. Li, H., et al., "A maximum efficiency point tracking control scheme for wireless power transfer systems using magnetic resonant coupling," IEEE Transactions on Power Electronics, Vol. 30, No. 7, 3998-4008, Aug. 2015.
doi:10.1109/TPEL.2014.2349534

7. Huh, J., et al., "Narrow-width inductive power transfer system for online electrical vehicles," IEEE Transactions on Power Electronics, Vol. 26, No. 12, 3666-3679, Jun. 2011.
doi:10.1109/TPEL.2011.2160972

8. Choi, S. Y., et al., "Ultraslim S-type power supply rails for roadway-powered electric vehicles," IEEE Transactions on Power Electronics, Vol. 30, No. 11, 6456-6468, Jun. 2015.
doi:10.1109/TPEL.2015.2444894

9. Waffenschmidt, E., "Homogeneous magnetic coupling for free positioning in an inductive wireless power system," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 3, No. 1, 226-233, Jun. 2015.
doi:10.1109/JESTPE.2014.2328867

10. Zhang, Z. and K. T. Chau, "Homogeneous wireless power transfer for move-and-charge," IEEE Transactions on Power Electronics, Vol. 30, No. 11, 6213-622, Mar. 2015.
doi:10.1109/TPEL.2015.2414453

11. Su, Y. C., et al., "Asymmetric coil sets for wireless stationary EV chargers with large lateral tolerance by dominant field analysis," IEEE Transactions on Power Electronics, Vol. 29, No. 12, 6406-6420, Feb. 2014.
doi:10.1109/TPEL.2014.2305172

12. RamRakhyani, A. K., S. Mirabbasi, and M. Chiao, "Design and optimization of resonance-based efficient wireless power delivery systems for biomedical implants," IEEE Transactions on Biomedical Circuits and Systems, Vol. 5, No. 1, 48-63, Oct. 2011.
doi:10.1109/TBCAS.2010.2072782

13. Soma, M., D. C. Galbraith, and R. L. White, "Radio-frequency coils in implantable devices: Misalignment analysis and design procedure," IEEE Transactions on Biomedical Engineering, Vol. 34, No. 4, 276-282, Apr. 1987.
doi:10.1109/TBME.1987.326088

14. Zierhofer, C. M. and E. S. Hochmair, "Geometric approach for coupling enhancement of magnetically coupled coils," IEEE Transactions on Biomedical Engineering, Vol. 43, No. 7, 708-714, Jul. 1996.
doi:10.1109/10.503178


© Copyright 2010 EMW Publishing. All Rights Reserved