下記の通り、融合研究特別講究を共催いたしました。
日時：2024年5月7日（火）10：30～
場所：６号館11階会議室
主催：名古屋工業大学
技術共催：先端医用物理・情報工学研究センター
協賛：IEEE EMC-S Japan Joint/Sendai Chapter
講師：Mauro Feliziani先生（University of L’Aquila）
タイトル：Characterization and mitigation of magnetic field emission from WPT systems at intermediate frequencies
Abstract
The goal of the seminar is the analysis of the EMC and EMF safety aspects of near-field wireless power transfer (WPT) systems. These systems based on resonant inductive coupling are very useful because they allow a wireless charging procedure of the batteries in electrical and electronic devices. However, near-field WPT systems based on inductive coupling are intentional sources of magnetic field, and therefore any mitigation of the field can degrade the electrical performance of the WPT system. For this purpose, particular care must be taken in the use of consolidated shielding techniques such as conductive shielding, magnetic shielding, passive cancellation loops, active cancellation loops, etc. In the seminar, various shielding techniques will be revisited for their correct application to WPT systems. Finally, some application examples will be provided for automotive high-power WPT systems that can cause EMC, EMF and IMD problems.
Keywords： wireless power transfer (WPT); magnetic field; electromagnetic compatibility (EMC), electromagnetic field (EMF) safety, implanted medical device (IMD).
講師：Francesca Maradei先生 (Sapienza University of Rome, Italy)
タイトル：Resonant inductive technology for efficient wireless power transfer to implanted medical devices
Abstract
An overview of the latest advances in the field of wireless power transfer to implanted medical devices using resonant inductive technology is provided. This technology is now very widespread for transferring electrical energy, exploiting the coupling between two or more coils, in the range from a few milliwatts to a few watts, at an operating frequency between a few kilohertz and tens of megahertz. Inductive coupling is very suitable for powering medical devices implanted in the human body, even at significant depths, since biological tissues are highly penetrable by low frequency magnetic fields. Possible applications include:
– Battery recharging of Active Implantable Medical Device (AIMD), such as pacemakers and ICDs
– Continuous electric energy supply for medical devices that require considerable operating power, such as Left Ventricular Assist Devices (LVADs) or others artificial organs
– Battery recharging or continuous electric energy supply for deeply implanted devices with continuously variable position and orientation as endoscopic capsules.
The WPT technology is particularly beneficial in the aforementioned biomedical applications. It enables the avoidance of surgery to replace the ICD battery, addresses driveline infections, which are the most critical issue in patients with implanted LVAD, and enhances the performance of endoscopic capsules by ensuring greater energy autonomy for movement control and robotic features for diagnostics.
Key challenges to be tackled in the WPT system design include selecting the operational frequency, optimizing coils size and weight, determining the distance between coils, and ensuring Electromagnetic Field (EMF) safety compliance.
