Contactless energy transmission system for electrical vehicles batteries charging

In these years, Inductive Power Transfer (IPT) has progressed to be an effective system for electrical vehicles batteries charging because it offers significant benefits in terms of safe operations even in wet and dirty environment. This paper investigate the design of a disc structure for the energy transmission over an airgap of several hundred millimetres. The main characteristic of the proposed system is the low frequency (20 kHz) of the resonance inverter used to feed the system in order to allow an easy adaption of existing industrial converter. FEM and approximated circuital simulations have been performed to define the optimal design of the system. Preliminary experimental results are presented to validate the approach.