Energy Dynamics Laboratory’s Wireless EV Charger
NORTH LOGAN, Utah– Utah State University Research Foundation’s Energy Dynamics Laboratory recently operated the first high-efficiency, high-power wireless power transfer system capable of rapidly charging an electric vehicle. The system transferred five kilowatts over an air gap of 10 inches with 90% efficiency.
“This demonstration is an extraordinary and historic step in providing technologies to electric vehicle owners who will be able to pull their cars into garages at home and charge without having to plug in with cords,” said Jeff Muhs, director of the Energy Dynamics Laboratory. “Our scientists and engineers have proven that enough power can be transferred over large distances to safely and efficiently charge electric car batteries from a pad under the ground to a receiver attached to the undercarriage of a vehicle – and this is just the beginning.”
EDL’s wireless charger is an upgraded version of the wireless chargers currently used to charge toothbrushes and cell phones. Their system, however, has an efficiency that has not been seen until now. EDL also demonstrated that their system is can handle a lateral misalignment of up to six inches.
“In the not-so-distant future, we will see vehicles go from being charged by plugging into the electric grid, to wirelessly charging in garages, shopping centers and dedicated refueling stations, to mass transit vehicles that are charged as they are in motion and eventually wireless electric roadways where cars will travel at 75 miles per hour while being charged,” stated Muhs. “Future versions of the system architecture developed at EDL have the unique potential to be embedded under pavement and transfer power wirelessly to vehicles at speeds of 75 mph or more and provide enough power to completely eliminate the range anxiety of electric vehicles. Wireless power transfer represents the disruptive technology that will eventually enable the safe and efficient electrification of highways, end our dependence on foreign oil, and enable a new era of enhanced mobility.”
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