Autonomous Resonant Frequency Tuning Controller for Repeater Resonator in Resonant Inductive Coupling Wireless Power Transfer System

Akihiro Konishi, Kazuhiro Umetani, Masataka Ishihara, Eiii Hiraki

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

Abstract

The resonant inductive coupling wireless power transfer technique (RIC-WPT) is emerging as a promising wireless power transfer method for small mobile devices with comparatively high-power transfer capability and good efficiency. However, the performance of the RIC-WPT system is severely deteriorated by the resonant frequency detuning of the transmitter, repeater, and receiver resonators, which can be naturally caused by the manufacturing tolerance and the aging effect of these resonators. Particularly, the detuning of the repeater resonator tends to severely affect the performance due to its high-quality factor, which should be solved for practical application of RIC-WPT technology. This paper addresses this difficulty by proposing an autonomous resonant frequency tuning controller circuit for the repeater resonator. The controller tunes the resonant frequency of the repeater resonator to the operating frequency of the inverter, driving the transmitter, without an external power supply and wireless communication with the inverter controller, which restricts the freedom of the installation location and therefore preferably be avoided in the wireless power transfer system. The operating principles of the proposed controller were confirmed by the circuit simulator, supporting the feasibility of the proposed controller.

Original languageEnglish
Title of host publicationProceedings of 2021 IEEE 30th International Symposium on Industrial Electronics, ISIE 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728190235
DOIs
Publication statusPublished - Jun 20 2021
Event30th IEEE International Symposium on Industrial Electronics, ISIE 2021 - Kyoto, Japan
Duration: Jun 20 2021Jun 23 2021

Publication series

NameIEEE International Symposium on Industrial Electronics
Volume2021-June

Conference

Conference30th IEEE International Symposium on Industrial Electronics, ISIE 2021
Country/TerritoryJapan
CityKyoto
Period6/20/216/23/21

Keywords

  • Control circuit
  • Frequency Synchronization
  • Hill climbing method
  • Resonant frequency
  • Wireless power transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering

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