Transient control of dynamic inductive EV charging and impact on energy efficiency when passing a roadside coil section

This paper discusses the transient response of a system for dynamic inductive power transfer to a vehicle passing a road-side coil section. Using a series-series-compensated topology with minimum number of passive components,... [ view full abstract ]

This paper discusses the transient response of a system for dynamic inductive power transfer to a vehicle passing a road-side coil section. Using a series-series-compensated topology with minimum number of passive components, a simple, communication-less strategy for safe magnetization of the roadside coil and strictly controlled charging power is first presented. The dynamic response of the resonant currents and the power transfer is assessed by a small-scale experimental setup designed to represent a freight truck in scale 1:14. The results show how the efficiency of the power transfer process to the moving vehicle is effectively independent of the traveling speed. Experimental evaluation of the achievable energy transfer is performed under several operating conditions, showing that the proposed strategy results in very short initialization transients, allowing for close-to-optimal operation at rated power when the vehicle-side coil is passing above the road-side coil, even at relatively high traveling speed.