Comparative study of resonant circuit for power transmission via inductive link

Wireless power transmission via inductive links has been more and more developed in the last years for low power applications. In this paper we will explore a solution to obtain a maximum output power and relative high efficiency for a Single input single output SISO coil system and for a multi-input single output MISO coil system using compensation capacitors in both sending and receiving sides. These compensation capacitors form four topologies: Series-Series, Series-Parallel, Parallel-Series and Parallel-Parallel. For the same reason a rectifier stage providing a DC output voltage is used. Investigation shows the dominance of the parallel-parallel topology for a maximum power and efficiency while using both single input single output and multi input single output coil system in case of fixed axial distance and variable lateral misalignment.