"The basic principle behind the system is magnetic resonance. The phenomenon was initially developed into a charging device a few years ago by Marin Soljačić, an assistant professor of physics at the Massachusetts Institute of Technology.
Soljačić was looking for an efficient way to power up cell phones and other small electronic goods wirelessly, over relatively short distances. The path he pursued was resonant coupling, which refers to the interaction between two objects that are tuned to the same frequency. The objects can exchange energy with each other, but have little effect on other objects.
Where Soljačić experimented with a 60-watt light bulb, the Stanford team is looking at slightly larger objects, namely, entire highways.
The Stanford team is headed by Shanhui Fan, an associate professor of electrical engineering, who envisions revamping basically the entire national infrastructure so that “you’ll be able to drive onto any highway and charge your car.”"
Mark Shwartz of the Precourt Institute for Energy at Stanford University explains: “Here’s how the system would work: A series of coils connected to an electric current would be embedded in the highway. Receiving coils attached to the bottom of the car would resonate as the vehicle speeds along, creating magnetic fields that continuously transfer electricity to charge the battery.”"
http://idealab.talkingpointsmemo.com/2012/02/an-electric-highway-to-charge-your-electric-vehicle-while-you-drive.php?ref=fpnewsfeed
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