Oak Ridge Lab engineers demonstrated a 120kW wireless charging system for electric vehicles, which, thanks to a new design and the addition of a silicon carbide device, achieves 97% energy transfer efficiency.
The Truth About Wireless Charging
The new technology has increased the power flow rate six times compared to their previous development. In parallel, they were able to achieve an efficiency rating comparable to traditional chargers. Tests were carried out with an air gap of 15 cm between the magnetic coils and the battery power system..
During operation, the system does not heat up and is completely safe, which minimizes charge loss. The device takes energy from the grid and converts it into a high-frequency alternating current that generates a magnetic field that can transmit power through a large air gap. Immediately after the energy enters the battery, it becomes a constant current and accumulates.
Researchers are looking to boost the device’s 350 kW power and improve wireless charging technology for electric vehicles while on the move. The dynamic power system will automatically charge vehicles through the pads installed under the road. However, this requires an increase in the power of such systems..
Other amazing inventions by young scientists will compete for the prestigious James Dyson Prize in November. Finalists include works such as potato plastic, an industrial ant nest, and a circular wind turbine that generates power from the wind in any direction..
text: Ilya Bauer, photo: cars-n