Design and optimization of a 3‐coil resonance‐based wireless power transfer system for biomedical implants. (15th September 2014)

• Record Type: Journal Article
• Authors: Yi, Ying; Buttner, Ulrich; Fan, Yiqiang; Foulds, Ian G.
• Is Part Of: International journal of circuit theory and applications. Volume 43:Number 10(2015:Oct.)
• Page Start: 1379
• Page End: 1390
• Publication Date: 2014-09-15
• Subjects: Electric circuit analysis -- Periodicals; 621.319205
• DOI: 10.1002/cta.2024
• Languages: English
• ISSNs: 0098-9886

Abstract

<abstract abstract-type="main"> <title>Summary</title> <p>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 <italic>Q</italic>. 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 6.76 MHz. This system can effectively transfer power for a distance of up to 50 mm. Moreover, our proposed 3‐coil system can achieve a high <italic>Q</italic>‐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 20 mm and more than 10% PTE at a distance of 40 mm. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract>