Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지
DOI QR코드

DOI QR Code

Magnetic Resonant Wireless Power Transfer with Rearranged Configurations

  • Kang, Seok Hyon (Graduate School of Nano IT Design Fusion, Seoul National University of Science and Technology) ;
  • Jung, Chang Won (Graduate School of Nano IT Design Fusion, Seoul National University of Science and Technology)
  • Received : 2016.11.15
  • Accepted : 2017.03.25
  • Published : 2017.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

We investigate the indirect-fed magnetic resonant wireless power transfer (MR-WPT) system for wireless charging for mobile devices by rearranging the loops and coils. Conventional MR-WPT is difficult to apply to consumer electronic products because of the arrangement of the resonators. In addition, there are restrictions for charging using a wireless technology, which depend on the circumstances of the usage scenarios. For practical applications, we analyzed the transfer efficiency of the MR-WPT system with various combinations and positions of resonators. Three rearranged configurations (Out-Out, Out-In, In-In) have been considered and experimentally investigated using hollow pipe loops and wire copper coils. There were four types of loops and two types of coils; each one had a different diameter and thickness. The results of the measurements show that the trends of the transfer efficiencies for the three configurations were similar. A transfer efficiency of 82.5% was achieved at a 35-cm distance between the 60-cm diameter transmitter (Tx) and receiver (Rx) coils.

Keywords

References

  1. A. Kurs, A. Karalis, R. Moffatt, and J. D. Joannopoulos, P. Fisher, and M. Soljacic, "Wireless power transfer via strongly coupled magnetic resonances," Science, vol. 317, no. 5834, pp. 83-86, 2007. https://doi.org/10.1126/science.1143254
  2. A. P. Sample, D. T. Meyer, and J. R. Smith, "Analysis, experimental results, and range adaptation of magnetically coupled resonators for wireless power transfer," IEEE Transactions on Industrial Electronics, vol. 58, no. 2, pp. 544-554, 2011. https://doi.org/10.1109/TIE.2010.2046002
  3. H. C. Son, J. W. Kim, Y. J. Park, and K. H. Kim, "EffiEfficiency analysis and optimal design of a circular loop resonance coil for wireless power transfer," in Proceedings of Asia-Pacific Microwave Conference, Yokohama, Japan, 2010, pp. 849-852.
  4. G. Grandi, M. Kazimierczuk, A. Massarini, and U. Reggiani, "Stray capacitances of single-layer air-core inductors for high-frequency applications," in Conference Record of the 1996 IEEE Industry Applications Conference, San Diego, CA, 1996, pp. 1384-1388.
  5. B. H. Waters, B. J. Mahoney, G. Lee, and J. R. Smith, "Optimal coil size ratios for wireless power transfer applications," in Proceedings of 2014 IEEE International Symposium on Circuits and Systems (ISCAS), Melbourne, Australia, 2014, pp. 2045-2048.
  6. R. Tseng, B. von Novak, S. Shevde, and K. A. Grajski, "Introduction to the alliance for wireless power loosely-coupled wireless power transfer system specification version 1.0," in Proceedings of 2013 IEEE Wireless Power Transfer (WPT), Perugia, Italy, 2013, pp. 79-83.
  7. J. H. Kim, B. C. Park, and J. H. Lee, "New analysis method for wireless power transfer system with multiple n resonators," Journal of Electromagnetic Engineering and Science, vol. 13, no. 3, pp. 173-177, 2013. https://doi.org/10.5515/JKIEES.2013.13.3.173
  8. Y. Zhang, Z. Zhao, and K. Chen, "Frequency splitting analysis of magnetically-coupled resonant wireless power transfer," in Proceedings of 2013 IEEE Energy Conversion Congress and Exposition (ECCE), Denver, CO, 2013, pp. 2227-2232.
  9. H. Hwang, J. Moon, B. Lee, C. H. Jeong, and S. W. Kim, "An analysis of magnetic resonance coupling effects on wireless power transfer by coil inductance and placement," IEEE Transactions on Consumer Electronics, vol. 60, no. 2, pp. 203-209, 2014. https://doi.org/10.1109/TCE.2014.6851995
  10. R. K. Mongia, I. J. Bahl, and P. Bhartia, RF and Microwave Coupled-Line Circuit. Norwood, MA: Artech House, 2007.
  11. H. Hoang, S. Lee, Y. Kim, Y. Choi, and F. Bien, "An adaptive technique to improve wireless power transfer for consumer electronics," IEEE Transactions on Consumer Electronics, vol. 58, no. 2, pp. 327-332, 2012. https://doi.org/10.1109/TCE.2012.6227430
  12. T. P. Duong and J. W. Lee, "Experimental results of highefficiency resonant coupling wireless power transfer using a variable coupling method," IEEE Microwave and Wireless Components Letters, vol. 21, no. 8, pp. 442-444, 2011. https://doi.org/10.1109/LMWC.2011.2160163
  13. J. Kim, W. S. Choi, and J. Jeong, "Loop switching technique for wireless power transfer using magnetic resonance coupling," Progress In Electromagnetics Research, vol. 138, pp. 197-209, 2013. https://doi.org/10.2528/PIER13012118

Cited by

  1. A compact module-integrated wireless power transfer system with a square metal plate pp.08952477, 2019, https://doi.org/10.1002/mop.31747