Analysis of primary-side series compensation of inductive chargers for biomedical implantable devices

In this work, the use of series compensation only in the primary side of an inductive charger for biomedical implantable devices is proposed, in order to minimize the component count of the implantable part of the system and increase its lifetime and reliability. Comparison with series-series compensation shows that the proposed topology is an equal substitute for the latter, in terms of output power, when operating at the natural resonant frequency. Simulation results validate the detailed theoretical analysis, suggesting that this is a promising alternative for contactless chargers for medical applications.