Finite Element Modelling of Litz Wire Conductors and Compound Magnetic Materials based on Magnetic Nano-particles by means of Equivalent Homogeneous Materials for Wireless Power Transfer System

New magnetic composite based on ferromagnetic nano-particles embedded in a polymeric material can potentially offer significant electromagnetic advantages over the polymer used to protect the ferrite in Wireless Power Transfer systems. Since the nano-particles and the strands of the litz wire are very small, brute force simulation by Finite Element Method is not possible. In this work, a method to overcome these limitations is proposed based on the use of homogenization techniques that will allow replacing both the Litz and the magnetic compound material by homogenous equivalent materials that will behave, in a macroscopic sense, as the actual material.