Analytical comparision on inductive wireless power transfer system for biomedical devices

Abstract EN

This paper presents a comparative analysis for the four basic topologies of inductive link wireless power transmission, thereby allowing designers to select the most appropriate topology according to the requirements of the application.

Wireless energy transfer systems applied for diagnostic or monitoring signals in biomedical devices to eliminate the needs for tethering wires or implantable batteries.

Inductive link studied as main technique in wireless power transmission for biomedical devices.

In various applications, the maximum delivered power and maximum efficiency of an inductive link system are two important factors to be considered.

The efficiency expression for power transfer of the four topologies (series – series, parallel – series, parallel –parallel, series-parallel) has been derived.

For biomedical devices, theoretically the series – series topology has been identified as the most suited due to its independency on the coupling coefficient however, series-parallel topology is widely used in practice.

The circuits have been simulated using ADS simulator of keysight technology at a resonant frequency of 13.56MHz.