Re: Any alternatives for conventional gasoline?

On Mon, 12 Jun 2006 15:38:48 +0100, Pooh Bear
<rabbitsfriendsandrelations@xxxxxxxxxxx> wrote:



Josh Hill wrote:

On Mon, 12 Jun 2006 11:23:39 +0100, Pooh Bear
<rabbitsfriendsandrelations@xxxxxxxxxxx> wrote:

Josh Hill wrote:

Another possibility -- the batteries could be recharged as one drives
by induction.

Not possible. It's technically infeasible. Just somebody's funny idea based on a poor
understanding of physics/ / electricity.

Please tell me you're kidding: the technology to power electric cars
by induction has been available for years.

Can you elaborate ? I read the previous post as referring to 'induction coils' to recharge the
battery. The best kind of induction coil for energy transfer is a transformer of course. Coils
positioned in free air don't have remotely enough coupling to transfer any useful power.

The coils needn't be positioned in free air -- they can be wound on
cores.

Inductive charging paddles are already used on some battery-powered
vehicles. Here's a brief writeup of a proposal to charge electric
vehicles with coils under a driveway:

http://home.earthlink.net/~bdewey/EV_chargedebate.html

The proposals I've seen for inductive roadways posit a guidance system
that keeps the car centered in its lane (not sure how they handle snow
.. . . ) I found a brief discussion here:

http://home.earthlink.net/~fradella/car.htm

Seems the DOT/DOE studied them, but I wasn't able to find the study
online, or much information of any kind -- most of the search results
I get are about induction motors.

And here's a (completely obvious, but what else is new) patent:

http://www.freepatentsonline.com/5311973.pdf

--
Josh

"I love it when I'm around the country club, and I hear people talking about the debilitating
effects of a welfare society. At the same time, they leave their kids a lifetime and beyond
of food stamps. Instead of having a welfare officer, they have a trust officer. And instead
of food stamps, they have stocks and bonds."

- Warren Buffett
.

Relevant Pages

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  • Re: Any alternatives for conventional gasoline?
    ... Inductive charging paddles are already used on some battery-powered ... vehicles with coils under a driveway: ... Those induction charging paddles involve very small airgaps. ... On cost, perhaps, although the coils would need to be present on only ...
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