Novel receiving coil structure for improving efficiency and power transfer capability of resonant inductive coupling wireless power transfer

T. Honjo, T. Koyama, Kazuhiro Umetani, Eiji Hiraki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Resonant inductive coupling wireless power transfer (RIC-WPT) is attractive as a convenient power supply method to small mobile apparatus. However, limited size of the receiving coil can limit the efficiency and the power transfer capability. This paper addresses this difficulty by proposing a novel receiving coil structure. The proposed structure has a coil wound on a drum core with a thin axis. The top and the bottom of the drum core has large surface area to effectively collect the magnetic flux for large mutual inductance. In addition, the thin axis can reduce the wire length, thus reducing the parasitic AC resistance. The AC resistance is further reduced by suppressing the proximity effect. Simulation supported probable improvement in the efficiency as well as the power transfer capability. In addition, experiment verified that the proposed structure improved the efficiency by 66% and the power transfer capability by 109%.

Original languageEnglish
Title of host publication19th International Conference on Electrical Machines and Systems, ICEMS 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9784886860989
Publication statusPublished - Jan 30 2017
Event19th International Conference on Electrical Machines and Systems, ICEMS 2016 - Chiba, Japan
Duration: Nov 13 2016Nov 16 2016

Other

Other19th International Conference on Electrical Machines and Systems, ICEMS 2016
CountryJapan
CityChiba
Period11/13/1611/16/16

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Keywords

  • Eddy current
  • Inductive coupling
  • Magnetic structure
  • Wireless power transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering

Cite this

Honjo, T., Koyama, T., Umetani, K., & Hiraki, E. (2017). Novel receiving coil structure for improving efficiency and power transfer capability of resonant inductive coupling wireless power transfer. In 19th International Conference on Electrical Machines and Systems, ICEMS 2016 [7837238] Institute of Electrical and Electronics Engineers Inc..