Integrated contactless power transmission systems with high positioning flexibility

Contactless power transmission provides the vision for the future development of energy distribution in industrial, business or consumer electronics or where a constructive conditional air gap must be bridged. By using the inductive technology, sliding contacts, trailing cables or slip rings can be eliminated and the safety and reliability of the energy supply can be improved. To design the transmission system, the paper presents a possibility to design the magnetic system by using analytical and numerical analyses. Based on special FEA models it is shown in the paper how to analyse and minimise the power loss of coil configurations. Furthermore it is shown how to reach a higher positioning flexibility of two coils of a resonant transmission system by optimising the coil parameters and the compensation technique. The paper presents two solutions of contactless transmission systems in the power range of 60 W and 1 kW and by means of an experimental set up the theoretical investigations are demonstrated by measurements.