Graph Sets Method for Multicoil Wireless Power Transfer Systems—Part I: Principles

A new approach to derive the equations of multicoil wireless power transfer (MCWPT) systems and to simplify and analyze them is proposed in this article. By parametrically solving the equations governing MCWPT systems and mapping the resultant transfer functions into graph sets (GSs), a set of rules is developed to form the transfer function among the voltages across and currents through the coils. Using these rules, some important aspects, such...