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Frank

6:01 PM on 21 July, 2009

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Last word I had on wireless electricity transmission was powering a ten watt bulb in some American university under limited conditions.

Am I out of touch ?

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John McLean

6:15 PM on 21 July, 2009

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Induction strips in the road will be prohibitive, but it would make an excellent solution for cark parks, garages, driveways, even for a quick two minute boost at a junction.

@Frank - I believe you are referring to wireless transmission of power. Induction uses fluctuating magnetic fields to induce current, and can be used at reasonably high efficiency to drive large loads, but only over short distances (say the distance from a charging pod raised slightly from the road surface to the underside of a car).

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Peter

6:24 PM on 21 July, 2009

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That is rubbish. I much prefer the method they use to make dodgems go at fair grounds. :)

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Hugo

7:25 PM on 21 July, 2009

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I fully endorse a UK-wide roll-out of dodgems!

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Chris

7:31 PM on 21 July, 2009

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Surely any magnetic field powerful enough to charge a car is going to be powerful enough to pull off your watch, jewellery, coins, tooth fillings, artificial hip joints, etc. Think MRI scanner. Sounds like just the kind of thing you want on a public road...

I suppose if the polarity is alternating fast enough and the distances are short then the field doesn't have to be as powerful while still transmitting enough energy. Still sounds nuts though.

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Tony Walker

8:05 PM on 21 July, 2009

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@Hugo

Come and have a go on the UK's only fully orbital motorway, the M60 round Manchester, (and then really in one direction as there's a roundabout (still on the motorway though) in the clockwise direction).

Makes the fairgroung ride quite boring. The stretch from the Eccles interchange through what is locally called "Death Valley" due to its notoriety, is particular (ahem) fun.

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Tony Walker

8:09 PM on 21 July, 2009

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EVs are useless to those of us without driveways and who cannot guarantee to be able to park outside our own houses.

Furthermore, we cannot stretch cables from our houses to the car without generating business for them lowlifes who advertise on national TV during the day. I'm sure the council is going to pay for kerbside power points for us all. Not.

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haim

9:21 PM on 21 July, 2009

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Why have they made an electric car, where range is a strong limitation, with such ridiculously poor aerodynamics?

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Chocoa

12:51 AM on 22 July, 2009

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Yea I go for Dodgems too.

Mind you I don't think they are emission free - judging by the coke, hot dogs lost in impacts and er 'human stomach projectile evacuation' on hard ass grudge matches...that I've seen at the Funfair.

- Still all technology has teething troubles ;)

BTW Nice moving brick in the picture - well done Nissan, Postman Pat must be well hot.

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Jay4d0

2:19 AM on 22 July, 2009

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@ Chris - nah its nothing like an MRI it does use magnetic fields to transfer the electricity but no magnets, just plain wires intersecting the field which transfers the electricity (if you get what I mean) so peoples watches wont be flying around

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Lance Uppercut

11:28 AM on 22 July, 2009

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@ Chris - the bottom of you car will act as a Farraday cage so containing any magnetic field from th electromagnetic induction effect. Also, the amount of current you'd need flowing through the wires to produce any magnetic field strong enough to physically move metallic objects would generate enough heat via resistance to melt the wires. This is one of the reasons MRI scanner windings are cooled with liquid helium to 4 degrees above absolute zero.

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evlover

5:36 PM on 22 July, 2009

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This is exactly the sort of news story that should be happening here in the U.S. The big three need to get the ball rolling on electric vehicles. Electric vehicles are safe, efficient, and clean. With a little more research, and a lot more commitment from the large automakers, electric cars become a very viable solution to reduce our oil consumptions, green house gas emissions, health care costs, and at the same time adding jobs and bolstering the economy. For more information about electric cars, their history (they’ve been around a long time, ask owners of the GM EV1 or RAV4-EV), and their advantages, check out the book “Two Cents Per Mile” by Nevres Cefo. The website for the book can be found at http://www.twocentspermile.com and you can read excerpts of it on Amazon at http://bit.ly/2centspermile

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Chris

6:08 PM on 22 July, 2009

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@Lance Uppercut - Yep, wasn't suggesting that anyone inside the car would be affected (more pedestrians), or that the field would realistically be anywhere near as powerful as an MRI scanner. It's just that an awful lot of energy would need to be transferred, and that just strikes me as requiring a rather strong field, superconductors or not, particularly if the distances involved are anything more than a few inches... Sounds a bit pie-in-the-sky, but I'd like to know how they plan to do it.

According to Wikipedia, there's an MIT project called WiTricity that might extend those distances without requiring an MRI-spec field.

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