An Inductive Power Transfer Highway System for Electric Vehicles

Electrical Vehicles (EVs) powered along their way are an attractive option since they are safer, lighter and unlimited cruising range. In this work a novel moving field inductive power transfer (MFIPT) system for on the road powering of electric vehicles is presented. The MFIPT is performed over a transformer system formed by a linear array of primary coils embedded in the roadway and a secondary coil in every electric vehicle. Primary and secondary coils are loosely coupled. The resulting high stray inductances are capacitively compensated. To minimize power loss only the primary coils under the vehicles are activated. The active primary coil acts as a switched resonant converter. When switching from one primary coil to the subsequent primary coil on the track, in order to follow the moving vehicle, the electric and magnetic energies stored in the coils and capacitors are passed on to the subsequent coils and capacitors in order to avoid loss of the stored energy. The system allows high-speed long-range cruise with a minimum on-board stored energy.     «

Electrical Vehicles (EVs) powered along their way are an attractive option since they are safer, lighter and unlimited cruising range. In this work a novel moving field inductive power transfer (MFIPT) system for on the road powering of electric vehicles is presented. The MFIPT is performed over a transformer system formed by a linear array of primary coils embedded in the roadway and a secondary coil in every electric vehicle. Primary and secondary coils are loosely coupled. The resulting high...     »