Design and optimization of a 3-coil resonance-based wireless power transfer system for biomedical implants

Ying Yi, Ulrich Buttner, Yiqiang Fan, Ian G. Foulds

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

This paper presents a resonance-based wireless power transfer system using a single layer of inductor coil windings, in a pancake configuration, in order to obtain a compact system for implantable electronic applications. We theoretically analyzed the system and characterized it by measuring its inductance, self-resonant frequency, and quality factor Q. In our resonance-based wireless power transfer prototype, we proposed a 3-coil system, using two 15-mm radius implantable coils, with a resonance frequency of 6.76MHz. This system can effectively transfer power for a distance of up to 50mm. Moreover, our proposed 3-coil system can achieve a high Q-factor and has a comparable power transfer efficiency (PTE) to previously reported works about 3-coil and 4-coil systems. The experimental PTE can achieve 82.4% at a separation distance of 20mm and more than 10% PTE at a distance of 40mm.
Original languageEnglish (US)
Pages (from-to)1379-1390
Number of pages12
JournalInternational Journal of Circuit Theory and Applications
Volume43
Issue number10
DOIs
StatePublished - Sep 15 2014

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering

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