The layered wireless charging system doubles its specific power.

Researchers have created and tested new layered designs of wireless charging devices that allow twice to increase their specific power and reduce the mass, compared with existing technologies.

Modern wireless charging systems of electric vehicles consist of two charging coils: one is attached under the vehicle, and the other is located at the ground level. When they are aligned, the transmitted power charges the battery.

The team of scientists from the National Laboratory of Ok-Ridge introduced a three-phase system project with rotating magnetic fields between coil layers, which works much more efficiently existing options.

According to the developers, the layered coil design transmits energy more evenly, which allows twice to increase the specific power. During the tests, the three-phase system successfully passed 50 kW of energy with an efficiency of 95%. As the system improves further, the efficiency will increase even greater.

This study brings the command to the creation of a device for charging an electric vehicle in 20 minutes.

In addition to electric vehicles, the technology is becoming increasingly popular for charging gadget batteries and a wireless charging device has been created.

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