Experimental verification of impedance matching method for repeater to improve spatial freedom of 6.78 MHz resonant inductive coupling wireless power transfer systems

Keita Fujiki, Masataka Ishihara, Kazuhiro Umetani, Eiji Hiraki

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

Abstract

Placing a repeater, which relays the magnetic field from the transmitter to the receiver, is promising as a method to increase the spatial freedom of resonant inductive coupling wireless power transfer systems (RIC-WPT) working at 6.78MHz. However, the capability of the repeater is often affected by a frequency splitting phenomenon. When this phenomenon occurs, the resonance in the repeater becomes sufficiently small at a fixed operating frequency and make it difficult to improve the spatial freedom. To solve this problem, we apply an impedance matching method using simple switching circuits to the 6.78 RIC-WPT system with the repeater. Then we carry out experiments to verify the effectiveness of the impedance matching method. The experimental results show that the repeater improves the spatial freedom of the 6.78 MHz RIC-WPT regardless of the frequency splitting phenomenon.

Original languageEnglish
Title of host publication2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9789075815313
DOIs
Publication statusPublished - Sep 2019
Event21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe - Genova, Italy
Duration: Sep 3 2019Sep 5 2019

Publication series

Name2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe

Conference

Conference21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe
CountryItaly
CityGenova
Period9/3/199/5/19

Keywords

  • Contactless Energy Transfer
  • Gallium Nitride (GaN)
  • Wireless power transmission

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electronic, Optical and Magnetic Materials
  • Control and Optimization
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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  • Cite this

    Fujiki, K., Ishihara, M., Umetani, K., & Hiraki, E. (2019). Experimental verification of impedance matching method for repeater to improve spatial freedom of 6.78 MHz resonant inductive coupling wireless power transfer systems. In 2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe [8915171] (2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/EPE.2019.8915171