ARLA/CLUSTER: Carregar à distancia os carros electricos na banda dos 6m (52 MHz)

[João Gonçalves Costa]

The Buzz - Electric car and 52MHz

Peter Ellis VK1PE has found a story that may have a hidden threat for 6 metres, in Japan and potentially elsewhere.

>From "What's new in Electronics" magazine for March/April 2013, comes this story.

Conventional battery-based electric vehicles are not popular with drivers because of drawbacks that mostly stem from the need to store large batteries on-board cars, so there are strong demands for alternative means of powering electric cars.

In a novel approach, Takashi Ohira at Toyohashi University of Technology and colleagues are developing an innovative method for powering EVs that drastically reduces the number of batteries. The approach exploits the steel belt usually embedded in rubber tyres. The steel belt collects power excited from a pair of electrodes buried beneath the road surface. And, since the steel belt is electrically insulated by the rubber tread, the researchers used a displacement current at high frequency to penetrate from underground to the steel belt.

The researchers constructed a 1/32 scale electric vehicle to prove their concept. The car moved successfully with a power penetration efficiency exceeding 75% at... 52MHz. This is the world's first demonstration of electric power transfer via the car wheel to the vehicle.

So, will the frequency scale, too? Up, to 1.664GHz; or, down, to 1.625MHz. Or, will it just stay on 6 metres?

For National Radio News,
Peter Ellis VK1PE

Fonte: WIA

What's new in Electronics
http://www.electroline.com.au/
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