Findings from Japan's First Public Road Experiments of Dynamic Wireless Power Transfer to Electric Vehicle

This research marks the first public road experiment of dynamic wireless power transfer (DWPT) to a moving electric vehicle (EV) in Japan. In the experiments, the prototype DWPT system succeeded in transmitting approximately 10kW of power to an actual automobile, recharging 63.3% of the power consumed in driving to the EV by the DWPT system, thereby suppressing the decline in the remaining battery energy. After 18 months of testing, the parameters of the transmission coil buried under the public road were stable against environmental changes without any undesirable behaviors such as false detection or false transmission to other general vehicles. Therefore, the prototype DWPT system can be effectively operated on public roads for a long period of time, and its usefulness was confirmed in an actual automobile on the public road.