Power maximization for capacitive wireless power transfer with two transmitters and one receiver

Inductive wireless power transfer from multiple transmitters to a single receiver has already been studied. However, for capacitive power transfer, an analysis of a multi transmitter setup has not yet been performed, even though useful applications are being developed for this technology. In this work, we determine the optimal solution for a capacitive wireless power transfer system in order to maximize the power transfer from two transmitter sources to a single load at the receiver side. As well the case for uncoupled as coupled transmitters is solved. We find that for the uncoupled configuration, a purely resistive load optimizes the system, whereas for the coupled configuration, a susceptance has to be inserted to maximize the power transfer. We confirm our results by circuit simulations.