Abstract

This paper presents a study on the efficiency of wireless power transfer (WPT) via inductive coupling, used in implantable biomedical devices. The expressions for efficiency of four different topologies used for WPT have been derived and a topology has been identified that is best suited for use with biomedical implants. The efficiency derived for the chosen topology is maximized and is compared with simulation results from ADS and they correlate well. A method has been proposed to select the components for SS topology to transfer the required power at maximum efficiency.

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