Dynamic wireless EV charging fed from railway grid: Magnetic topology comparison

Dynamic wireless charging is the process of supplying electrically driven vehicles along their driving path with electric energy via a wireless energy transfer system. To increase the range of electric vehicles, a dynamic charging lane is to be installed on a highway. With regard to the amount of power needed, supply of electric energy is a major concern. High-power overhead lines or cables are not regularly available. In many cases, electrified railway lines run in parallel to or cross motorways. Consequently, the railway energy supply system can be used to feed the wireless energy transfer system. This paper introduces a concept of supplying the wireless power system and appropriate magnetic layouts are selected according to a comparison of different magnetic design approaches. A companion paper introduces and discusses concepts for the link between the railway grid and the wireless charging system.