Single-seater vehicle prototype experiment powered by high frequency electric field on an asphalt-paved roadway

Abstract

This paper presents a prototype development of a battery-less EV for dynamic wireless power transfer. To dynamically transmit HF power from the roadway, we propose a kind of capacitive coupling scheme called Via-Wheel Power Transfer (V-WTP). This scheme transmits HF power from a pair of rails consisting of metal plates under the roadway to the EV via steel belts in tires and wheels. To transmits HF power by V-WPT, we prototype front and rear wheels assembly, and mount it onto the EV. We remove all the onboard battery. In place of it, we mount onboard system composed of HF electric circuit we developed. We experiment dynamic wireless power transfer to the battery-less compact EV in motion, and demonstrate that the EV is runnning at 10 km/h on the roadway for 4 meters.