Wireless Power Transfer Closed-Loop Control for Low-Power Active Implantable Medical Devices

Fabiana Del Bono, Andrea Bontempi, Nicola Di Trani, Danilo Demarchi, Alessandro Grattoni, Paolo Motto Ros

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Near-field resonant inductive coupling is the most mature wireless power transfer (WPT) method for implantable medical devices. Common commercial WPT components are not optimized neither to deliver small amounts of power nor to work with other than small air gaps. In this paper, a closed-loop control is integrated with commercial off-the-shelf WPT components to efficiently recharge and power an implantable device for controlled active drug delivery. The system keeps the transmitted power stable and reliable, achieving a 26 % transfer efficiency with delivered power of tens of milliwatts, guaranteeing an autonomy of 5 days with a 4-hour recharge. Overheating is kept around the 2 °C safety limit.

Original languageEnglish (US)
Title of host publication2022 IEEE Sensors, SENSORS 2022 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665484640
StatePublished - 2022
Event2022 IEEE Sensors Conference, SENSORS 2022 - Dallas, United States
Duration: Oct 30 2022Nov 2 2022

Publication series

NameProceedings of IEEE Sensors
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229


Conference2022 IEEE Sensors Conference, SENSORS 2022
Country/TerritoryUnited States


  • Active implantable medical devices (AIMDs)
  • nanochannel Delivery System (nDS)
  • near-resonant inductive coupling (NRIC)
  • wireless power transfer (WPT)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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