Wireless charging for vehicles-some key elements

In this paper so called wireless charging is investigated, primarily considering applications such as charging hybrid or electric vehicles at stand-still. The base concept investigated is a sending and a receiving coil at various designs. The theory behind wireless energy transfer and the needed components are described and analyzed, showing how design aspects, frequencies, height and vertical displacement affect the results. Analytical expressions, measurements, as well as FEM analyses in 2D and 3D with two different FEM programs have been compared, with a reasonable agreement between methods.