Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems

Masataka Ishihara, Shoma Ohata, Keita Fujiki, Kazuhiro Umetani, Eiji Hiraki

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

1 Citation (Scopus)

Abstract

Intermediate resonators (repeaters) for resonant inductive coupling wireless power transfer have been widely studied as a method of improving not only the transmission distance but also the output power. For the repeater to operate effectively, it is needed to induce a large current in the repeater to enhance the magnetic field far from a transmitting resonator. However, it is often difficult to induce a large current in the repeater due to frequency splitting phenomenon. This phenomenon easily occurs when the resonator having high quality factor such as the repeater is used. The frequency characteristic of the induced current in the repeater has multiple peaks when the frequency splitting phenomenon occurs. In addition, these multiple peaks shift according to slight variation in the parameters of the coil and the capacitor that constitute the resonator. This slight variation is easily caused by production error, temperature characteristic, and aging degradation of the coil and the capacitor. The induced current in the repeater is significantly decreased by the slight variation in the parameters, namely, the slight variation in the resonance frequency. Therefore, the repeater has low robustness against variation in the resonance frequency. To address these difficulties, we apply an auxiliary circuit to the repeater. The auxiliary circuit can dynamically adjust a phase of the induced current in the repeater, namely, the resonance frequency without complicated control. As a result, a large induced current can be maintained even if the frequencies corresponding to the peaks shift. Consequently, we can provide the repeater having a stable characteristic against the variation in the resonance frequency. The effectiveness of the repeater applied the auxiliary circuit and the appropriateness of analysis results are supported with simulation and experimental results.

Original languageEnglish
Title of host publication2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9789075815283
Publication statusPublished - Oct 30 2018
Event20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe - Riga, Latvia
Duration: Sep 17 2018Sep 21 2018

Other

Other20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe
CountryLatvia
CityRiga
Period9/17/189/21/18

Fingerprint

Telecommunication repeaters
Induced currents
Resonators
Networks (circuits)
Capacitors
Aging of materials

Keywords

  • Circuits
  • Contactless Energy Transfer
  • Wireless power transmission

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Renewable Energy, Sustainability and the Environment

Cite this

Ishihara, M., Ohata, S., Fujiki, K., Umetani, K., & Hiraki, E. (2018). Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems. In 2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe [8515386] Institute of Electrical and Electronics Engineers Inc..

Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems. / Ishihara, Masataka; Ohata, Shoma; Fujiki, Keita; Umetani, Kazuhiro; Hiraki, Eiji.

2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe. Institute of Electrical and Electronics Engineers Inc., 2018. 8515386.

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

Ishihara, M, Ohata, S, Fujiki, K, Umetani, K & Hiraki, E 2018, Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems. in 2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe., 8515386, Institute of Electrical and Electronics Engineers Inc., 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe, Riga, Latvia, 9/17/18.
Ishihara M, Ohata S, Fujiki K, Umetani K, Hiraki E. Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems. In 2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe. Institute of Electrical and Electronics Engineers Inc. 2018. 8515386
Ishihara, Masataka ; Ohata, Shoma ; Fujiki, Keita ; Umetani, Kazuhiro ; Hiraki, Eiji. / Improving Robustness Against Variation in Resonance Frequency for Repeater of Resonant Inductive Coupling Wireless Power Transfer Systems. 2018 20th European Conference on Power Electronics and Applications, EPE 2018 ECCE Europe. Institute of Electrical and Electronics Engineers Inc., 2018.
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