Comparison of Conventional and Magnetizable Concrete Core Designs in Wireless Power Transfer for Electric Vehicles

Most of the designs for wireless power transfer involve the utilization of ferrite bars or tiles as magnetic shielding. However, ferrite is expensive and fragile, making handling difficult and time-consuming. Therefore, for application areas where modularity and flexibility of installing the charging pads are the main requirements for the utilization of wireless power transfer, it could be helpful to have an alternative to the ferrite bars or tiles. This work presents a performance analysis and comparison of two otherwise identical geometrical designs of ground and vehicle assemblies. One model has a ground assembly with conventional ferrite core, whereas the other utilizes magnetizable concrete instead. The study uses three-dimensional finite element analysis for electromagnetic compatibility and system-level analyses.