Analytical and experimental investigations of magnetic field distribution for wireless power transfer system with Ferrite core

Abstract

Inductive coupled wireless power transfer (WPT) system transfers energy through the magnetic field. The magnetics field distribution of WPT system has significantly influence on the transmission efficiency and misalignment tolerance. This study investigates the magnetic field distribution of WPT system and presents a magnetic field distribution analytical model for WPT system. The analytical model is based on Fourier analysis method, and it can be applied in the cases of coil with air core and with Ferrite core. Furthermore, the finite element simulation model and experiment are conducted. The results of analysis, simulation and experiment are in good agreement.