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.
Highlights
All over the world particular attention is paid to human health concerns, which represents the first source of joy and well-being
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 Wireless Power Transfer (WPT)
In order to have a stable transmitter in frequency and temperature, we propose the use of multilayer ceramic capacitors
Summary
All over the world particular attention is paid to human health concerns, which represents the first source of joy and well-being. Heart or hearing troubles, vision loss or stomach pathologies in addition to other anomalies may engender in some cases serious issues and in some cases threaten life. All these health problems have highlighted a major and urgent need to find solutions that can overcome these complications, and increase patients’ life expectancy, improve their quality life and ensure their comfort and safety. Among the most important medical inventions, implants have realized a very wide scope of biomedical applications and have saved innumerable human lives. They must be removed only by medical
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