Premium
Design and optimization of a 3‐coil resonance‐based wireless power transfer system for biomedical implants
Author(s) -
Yi Ying,
Buttner Ulrich,
Fan Yiqiang,
Foulds Ian G.
Publication year - 2015
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.2024
Subject(s) - electromagnetic coil , wireless power transfer , inductance , coil tap , maximum power transfer theorem , resonant inductive coupling , resonance (particle physics) , q factor , inductor , electrical engineering , power (physics) , radius , capacitor , wireless , coil noise , electronic engineering , materials science , engineering , computer science , physics , telecommunications , energy transfer , rogowski coil , resonator , computer security , engineering physics , particle physics , quantum mechanics , voltage
Summary 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 6.76 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 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 20 mm and more than 10% PTE at a distance of 40 mm. Copyright © 2014 John Wiley & Sons, Ltd.