Key factors for wireless power transfer

Jul 31, 2013

What happens to a resonant wireless power transfer system in the presence of complex electromagnetic environments, such as metal plates? A team of researchers explored the influences at play in this type of situation, and they describe in the American Institute of Physics' journal AIP Advances how efficient wireless power transfer can indeed be achieved in the presence of metal plates.

The team discovered that matching, alignment of the magnetic field, and impedance matching are the most important factors for efficient wireless power transfer. These findings are highly significant, they say, because one futuristic application of wireless power transfer would be to harness and use it via to charge electric vehicles.

Corresponding coils attached to the bottom of an electric vehicle would pick up energy as the vehicle passes over the coils embedded in the highway. With this type of dynamic charging, an electric vehicle's driving range could become unlimited and the size of its batteries would be greatly reduced.

Wireless power transfer technology may find use in a wide range of applications beyond powering electric vehicles, said Xiaofang Yu, an electrical engineer and postdoctoral fellow at Stanford University who led the research.

Other applications may include charging mobile devices, , or even medical devices implanted in the human body.

Explore further: Scientists invent award winning 2-in-1 motor for electric cars

More information: The article "Wireless power transfer in the presence of metallic plates: Experimental Results" by Xiaofang Yu, Torbjorn Skauli, Bjorn Skauli, Sunil Sandhu, Peter B. Catrysse, and Shanhui Fan appears in the journal AIP Advances. dx.doi.org/10.1063/1.4809665

add to favorites email to friend print save as pdf

Related Stories

Charging electric vehicles cheaper and faster

Apr 30, 2013

Researchers at Chalmers have developed a unique integrated motor drive and battery charger for electric vehicles. Compared to today's electric vehicle chargers, they have managed to shorten the charging time ...

Qualcomm's HaloIPT tech brings wireless charging for EVs

Jan 16, 2012

(PhysOrg.com) -- Qualcomm has demonstrated its new wireless power transmission system for electric vehicles (EVs) at the Consumer Electronics Show (CES). The system, including one pad for power transmitting, ...

Apple patents a 1-meter-range wireless charging system

Jun 15, 2011

(PhysOrg.com) -- According to a recently submitted patent application by Apple, wireless charging may be a whole new boost. That patent, which is entitled "Wireless power utilization in a local computing environment" is a syst ...

Recommended for you

First self-contained step dimming LED tube

17 hours ago

Samsung Electronics today introduced the industry's first AC Direct step-dimming LED linear replacement for T8 and T12 fluorescent tubes at the National Electrical Contractors Association (NECA) Convention ...

Battery system will be able to light 2,500 homes

17 hours ago

One of the largest, most environmentally-friendly, battery-based energy storage systems in the nation will be installed at the University of California, San Diego the campus announced today (Sept. 29).

NREL software tool a boon for wind industry

20 hours ago

Wind energy is blowing away skeptics—it's so close to achieving cost parity with fossil fuels that just a little extra efficiency is all that is likely needed to push it into the mainstream and past the ...

Harvesting energy from walking

20 hours ago

A device that fits into a shoe harvests the energy made by walking and successfully uses it in watch batteries.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

Thnder
not rated yet Jul 31, 2013
"Corresponding coils attached to the bottom of an electric vehicle would pick up energy as the vehicle passes over the coils embedded in the highway."
Sounds expensive. I could see it in certain areas, but this Country has a crap load of Highways.
Oh and how do you charge people for that? Taxes? Tolls? A meter?