A Wireless Power Transfer System for Biomedical Implants based on an isolated Class-E DC-DC Converter with Power Regulation Capability

Conference Paper (2020)
Author(s)

A. Celentano (Politecnico di Torino)

Fabio Pareschi (Politecnico di Torino, University of Bologna)

V. Valente (TU Delft - Bio-Electronics)

Riccardo Rovatti (University of Bologna)

Wouter Serdijn (TU Delft - Bio-Electronics)

Gianluca Setti (University of Bologna, Politecnico di Torino)

Research Group
Bio-Electronics
Copyright
© 2020 A. Celentano, Fabio Pareschi, V. Valente, Riccardo Rovatti, W.A. Serdijn, Gianluca Setti
DOI related publication
https://doi.org/10.1109/MWSCAS48704.2020.9184689
More Info
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Publication Year
2020
Language
English
Copyright
© 2020 A. Celentano, Fabio Pareschi, V. Valente, Riccardo Rovatti, W.A. Serdijn, Gianluca Setti
Research Group
Bio-Electronics
Pages (from-to)
190-193
ISBN (print)
978-1-7281-8059-5
ISBN (electronic)
978-1-7281-8058-8
Reuse Rights

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Abstract

In this paper, the design of a wireless power transfer system (WPT) targeting biomedical implants is considered. The novelty of the approach is to propose a co-design of the transmitter and receiver side based on the design of class-E isolated DC-DC converters. The solution, along with the simple introduction of a shunt regulator at the receiver, allows us to solve the problem of ensuring optimal efficiency in the WPT link. In conventional solutions, in order to cope with coupling factor and load variations, information from the receiver is needed, which is usually relayed back onto the transmitter by means of telemetry. With the proposed approach, a very simple minimum power point tracking (mPPT) algorithm can be used to maximize the WPT efficiency based on the information already available at the transmitter side. This reduces the complexity of the circuitry of the implant and thereby its power overhead and possibly its size, both being crucial constraints of a biomedical implant.

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