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Home»Automotive»Oak Ridge National Laboratory demonstrates 100-kW wireless charging from a automobile parking space
Automotive

Oak Ridge National Laboratory demonstrates 100-kW wireless charging from a automobile parking space

Jonathon RamseyBy Jonathon RamseyMarch 30, 2024No Comments3 Mins Read
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Oak Ridge National Laboratory Demonstrates 100 Kw Wireless Charging From A
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The white coats at Oak Ridge National Laboratories (ORNL) in Tennessee have hit a research milestone for the world of electrical vehicles that looks as if a plausible reality in the approaching decade. Earlier this month, after parking a Hyundai Kona EV over a brand new wireless charger design, the scientists and engineers registered a max wireless charging rate of 100 kW across a five-inch air gap at a claimed efficiency of 96%. In an earlier bench test, researchers hit 120-kW wireless charging speeds, but this test used a production automotive parked atop the prototype coil. The facility registered is comparable to a lower Level 3 plug-in system using an excellent cable, trouncing the very best commercially available wireless chargers and wall-mounted Level 2 systems — potent enough to revive about 350 miles in an hour of charging in comparison with around 42 miles. Within the case of the Kona EV, a full charge on the max rate would take lower than an hour.

The magic comes from a polyphase electromagnetic coupling coil, a design ORNL’s been working on for no less than three years. A paper the lab put out in 2022 claimed, “High-power wireless power transfer (WPT) systems with polyphase electromagnetic couplers” generally is a higher solution because of “very high surface power density,” high efficiency, more compact form aspects, and the flexibility to integrate automated charging processes that might serve autonomous vehicles.

The wireless charging for dummies explanation is that a sending coil takes AC (alternating current) electricity from the wall and turns that electricity into an alternating magnetic field. A second coil contained in the device to be charged then turns that magnetic field into electricity to charge the battery.   

The ORNL unit, at only 14 inches wide, comprises coils fabricated from various materials that create a magnetic field in the identical way utilized by consumer devices like cellphones and toothbrushes, called inductive charging. Receiving coils built right into a unit on the underside of the Kona EV turn that stronger, more uniform magnetic field into electricity, at a better efficiency than most wireless charging setups are able to. The truth is, a variety of EV charging tests showed plugged-in Level 2 and Level 3 charging losses of around 14% to twenty%.

ORNL didn’t explain how its “polyphasing” differs from the phased electromagnetic fields in traditional inductive charging, but did say “rotating magnetic fields generated by the coil phase windings boost the facility.” Along with the 100-kW rate, the five-inch gap is a giant deal; inductive wireless charging is generally constrained to a spot of a couple of millimeters (note, the Kona EV normally sits 5.9 inches off the bottom).  

What is going to it take to get this small, powerful box put into parking spaces and parking garages? The same old: Uniform wireless charging mechanisms and standards, materials vs. costs analyses, and the political and company will to foot the bill. Take the standards alone, a paper from December 2023 breaks down eight sorts of wireless power transfer technologies, all with their pros and cons. In contrast to the ORNL solution, as an illustration, MIT spun off the wireless EV charging company WiTricity that uses magnetic resonance charging for its Halo charger that maxes out at 11 kW. It’ll be a minute before we are able to enjoy ORNL’s breakthrough, however the achievement in real-world application gets the clock going.

This Article First Appeared At www.autoblog.com

100kW charging demonstrates laboratory National Oak parking Ridge Space wireless
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