Central Bulge Ferrite Core for Efficient Wireless Power Transfer

To improve the efficiency of wireless power transfer (WPT) system without increasing size, a central bulge ferrite core with novel configuration is proposed. The mutual inductance between magnetic coupling structures able to increase obviously, which approved by eigenfunction expansion method. In this paper, mathematical models planar and are established, respectively, as two types calculated in same condition. structure parameters further optimized Maxwell field simulation. Experiments conducted compare WPT cores improving system, influence transmission distance, lateral misalignment, load variation taken into account. results show that has better performance than one, even case long distance misalignment.