A Modified Wireless Power Transfer System for Medical Implants

Yosra Ben Fadhel, Sana Ktata, Khaled Sedraoui, Salem Rahmani and Kamal Al-Haddad
Additional contact information
Yosra Ben Fadhel: Research Laboratory of Biophysics and Medical Technology (BMT) at High Institute of Medical Technologies of the University of Tunis El-Manar, 1002 Tunis, Tunisia
Sana Ktata: Research Laboratory of Biophysics and Medical Technology (BMT) at High Institute of Medical Technologies of the University of Tunis El-Manar, 1002 Tunis, Tunisia
Khaled Sedraoui: Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia
Salem Rahmani: Research Laboratory of Biophysics and Medical Technology (BMT) at High Institute of Medical Technologies of the University of Tunis El-Manar, 1002 Tunis, Tunisia
Kamal Al-Haddad: Canada Research Chair in Energy Conversion and Power Electronics CRC-ECPE École de Technologie Supérieure, 1100 Notre-Dame, Montréal, QC H3C 1K3, Canada

Energies, 2019, vol. 12, issue 10, 1-21

Abstract: Wireless Power Transfer (WPT) is a promising technique, yet still an experimental solution, to replace batteries in existing implants and overcome the related health complications. However, not all techniques are adequate to meet the safety requirements of medical implants for patients. Ensuring a compromise between a small form factor and a high Power Transfer Efficiency (PTE) for transcutaneous applications still remains a challenge. In this work, we have used a resonant inductive coupling for WPT and a coil geometry optimization approach to address constraints related to maintaining a small form factor and the efficiency of power transfer. Thus, we propose a WPT system for medical implants operating at 13.56 MHz using high-efficiency Complementary Metal Oxide-Semiconductor (CMOS) components and an optimized Printed Circuit Coil (PCC). It is divided into two main circuits, a transmitter circuit located outside the human body and a receiver circuit implanted inside the body. The transmitter circuit was designed with an oscillator, driver and a Class-E power amplifier. Experimental results acquired in the air medium show that the proposed system reaches a power transfer efficiency of 75.1% for 0.5 cm and reaches 5 cm as a maximum transfer distance for 10.67% of the efficiency, all of which holds promise for implementing WPT for medical implants that don’t require further medical intervention, and without taking up a lot of space.

Keywords: wireless power transfer; active implant; resonant inductive coupling; power transfer efficiency; form factor; coil; DC/AC converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/10/1890/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/10/1890/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:10:p:1890-:d:232234

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().