Feasibility Analysis of Nanocrystalline Cores for Polarize and Non-Polarized IPT Charging Pads

Abstract

In this contribution, a feasibility analysis of using nanocrystalline ribbon as a replacement for ferrite in inductive power charger's cores is presented. As well, a method for the analysis of core loss of high frequency magnetic cores with anisotropic conductivity is analysed. FEM simulations and experimental validations are used to compare both materials as cores of inductive pads. Despite nanocrystalline's superior magnetic properties, both materials yield similar coupling factors and inductances. The improvement in M achieved with nanocrystalline cores is ~2.8%. Eddy current losses redefine the flux distribution in nanocrystalline cores and increase the overall core losses. About 20% higher core losses are expected. However, results suggest that due to the higher saturation point of nanocrystalline, a core miniaturization can be effectively achieved.