Riding the Electromagnetic Wave of the Future

Marc

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#1
Riding the Electromagnetic Wave of the Future

Spiegel Online said:
"Speedway," as he calls the project, is simple. In city and local traffic, his cars will move under their own power, propelled by electric motors built for lower speeds. On one charge these vehicles could travel 200 kilometers -- more than enough for a short trip. For longer trips Förg envisions a system of highways outfitted with so-called linear induction motors, where his electric cars can link up quietly with an electromagnetic field, cruise for long distances, then exit again under their own power.
 
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WCHorn

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#2
In the late 50s, I remember reading in Popular Science about how people would be using flying cars by the 70s. Of course, given the way folks drive nowadays, I'm glad that little vision didn't come to fruition.

I think it's a great concept, as long as the energy comes from renewable sources.
 
M

MIREGMGR

#3
On one charge these vehicles could travel 200 kilometers -- more than enough for a short trip. For longer trips Förg envisions a system of highways outfitted with so-called linear induction motors, where his electric cars can link up quietly with an electromagnetic field, cruise for long distances, then exit again under their own power.
The short-trip aspect of his vision will be here within a year, except limited to a shorter range...currently known battery technology is too expensive, bulky, heavy and ambient-temperature sensitive to allow a range of 200 km except with a generator onboard. The Nissan Leaf and other vehicles will offer something like 60 km range, pure electric. Of course, if you allow the batteries to go dead, you'll need a tow. Or the Chevy Volt of course will allow 40 km battery range and have its own generator for backup and for long trips.

As to linear induction motors on long-distance roads: this is irrational from an engineering perspective. The cost of building and maintaining those tens of thousands of miles of low-efficiency motor-half would dwarf, by maybe two or three orders of magnitude, the cost of just building conventional 2011-technology bimodal vehicles and paying for conventional fuels to power them on long trips. His cost estimate of 8.5 million euros for installation of a linear induction system on an "autobahn route" doesn't seem to make sense, unless that's per km or so. In a Sandia Labs analysis, the cost of a similar technology in 1995 dollars was roughly estimated at $2 million per uncomplicated mile.

Linear induction motors also use massive amounts of energy non-productively when they're not coupled to the opposing motor-half. Thus they make sense from a control perspective for trains, where high complexity sensors and controls can energize just the part of the system that a train is over, with lots of high speed energy switching. Such a system deployed over tens of thousands of miles of highways with randomly spaced vehicles and very short lengths, requiring very short control sections, would be dauntingly expensive to implement.

In addition, of course, linear motor technology isn't even physically workable anywhere that roads might have a layer of snow and salt might be used for safety road-clearing.
 
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bobdoering

Stop X-bar/R Madness!!
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#4
We are still looking for some forward thinking data on the resources available for the increase in Mw of increase generation of power and the tons of raw materials for the batteries needed for the next 100 years or so if we were to jump into a electric propulsion lifestyle. The rush to own the mines for battery raw materials has been discussed. But, much in the same way we predict how long the oil deposits would last, how many cars, trucks, etc. can we practically build with the known resources. It would be shame to rush into the technology, then come to a dead end when the resources run out...because we didn't bother to calculate that out.
 
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