  Despite the advantages of capacitive power transfer (CPT), inductive power
transfer (IPT) is still preferred. The reason: IPT systems have a gap power
density in air that is 400 times greater. Conclusively, IPT can transmit more
power than CPT over greater distances in air, but what about other media? This
paper gives an answer on how media, different from air, influence the power
transfer over different distances. First, we analyze theoretically the
capacitive coupling with different media in the gap. Next, we simulate the CPT
system using finite element software and compared it with the theoretical
analysis. Finally, we employ the results of the finite element simulation in a
power electronic simulation to examine the influence of the medium on the
electrical power transfer.
