The system was operated for dynamic charging of the truck on a 50-meter section at a speed of up to 30 km/h. Credit: John NorrbyThe system was operated for dynamic charging of the truck on a 50-meter section at a speed of up to 30 km/h. Credit: John NorrbyElectReon has completed initial tests on dynamic wireless charging of a 40-ton long-haul electric truck in Sweden. The test was conducted on a public stretch of electric road that was deployed in November 2019, and took place over the course of a week and a half in winter conditions.

Initially, the charging management unit was installed on the side of the road and was connected to the electric grid and coils under the road. Communication with the coils was tested and then static charging of the truck was tested via its five receivers.

Finally, the system was operated for dynamic charging of the truck on a 50-meter section at a speed of up to 30 km/h. The system was automatically operated and remotely monitored.

The technology includes a Dynamic Wireless Power Transfer system, coils placed under the road at the center of the traffic lane, a receiver located under the vehicle chassis and a communication system to provide real-time communication with each vehicle. The power station includes an underground system that transmits the energy to the road’s infrastructure.The technology includes a Dynamic Wireless Power Transfer System, coils placed under the road at the center of the traffic lane, a receiver located under the vehicle chassis and a communication system to provide real time communication with each vehicle. Credit: ElectReon The technology includes a Dynamic Wireless Power Transfer System, coils placed under the road at the center of the traffic lane, a receiver located under the vehicle chassis and a communication system to provide real time communication with each vehicle. Credit: ElectReon

ElectReon Wireless, which developed the system, said test results were satisfactory - the system operated while the truck was moving and all the receivers functioned and transferred 45 kW to the truck's battery.

During the coming months the amount of transferred power and vehicle speed will be increased in order to reach the goal of 125 kW and highway speed. Additional electric road segments also will be deployed.

The tests were done as part of Smartroad Gotland, which is one of the world's first wireless electric roads for trucks and buses on public roads. Smartroad Gotland is supported and financed by the Swedish Transport Administration and is led by ElectReon AB, a Swedish unit of Israeli company ElectReon Wireless.