High‐efficiency LC‐S compensated wireless power transfer charging converter for implantable pacemakers
Sevilay Çetin, Yunus Emre Demirci
Abstract
Abstract This paper deals with wireless power transfer (WPT) based on magnetic coupling resonance in order to delivery power to a cardiac pacemaker from the outside of the body. The high‐efficiency power delivery, implantation, and safety are key parameters for a WPT system, designed for active implantable medical devices. Therefore, this paper is focused on high‐efficiency power transfer, implantation, and safety issues. For the wireless charging of the pacemaker, the LC‐S compensation topology is presented and designed based on high‐efficiency power delivery. The resonant components of the LC‐S compensation topology were extracted in order to ensure that WPT converter operates at resonance frequency. The operation of the presented WPT charging converter is validated by a prototype operating at 300‐kHz operation frequency. At 4.2 V output voltage and 0.45 A output current, the WPT efficiency of the prototype is measured as 82.39%. Finally, the safety evaluation of the proposed WPT converter is also discussed based on reference values presented in the literature.