Comparison of Planar and Solenoid Coil Arrangements for Inductive EV-Charging Application

摘要

In the last years the new application of wireless inductive electric vehicle (EV) charging is attended bya great improvement of inductive power transmission technology. Today, there are different solutionsfor inductive EV-charging systems available; charging via the number plate of the car and charging viacoils in bottom side (underbody) of the car. To meet the safety and efficiency requirements that aredefined in German and International technical proposals, the magnetic assembly, the powerelectronics and the communication components have to be designed very well and correctly. In thepresented work three different coil arrangements for the inductive EV-charging are investigated andcompared. Therefore, the magnetic coupling factor, the EMF-characteristic as well as the power lossin the car underbody are taken into account. As a result, pros and cons of different coil arrangementsare presented and discussed and different solutions of inductive EV-charging systems are presented.