Back in the seventies I had a friend of my who was a geo-physics' and a
geologist that work with Nikola Tesla back in the thirties. He map out the
dielectric rating of the ground path between two of the towers about a mile
apart in Colorado.
A good ground path of 80 or more dielectric constant is good which is the
dielectric of water. Not good is oil which is down to 3. Rock, gravel and
sand is in the 10 to 15 dielectric constant.
A radio frequency of 1000 cycle have a wave length of 100 meters in air. If
you take a antenna and ground the coil to earth and use another antenna 100
meters away that is also grounded to earth, you will get a ground path back to
the first antenna.
Using a field strength metal and a micro-micro amp meter, you can read the
return frequency of this signal. The frequency going through the air will have
about a constant 1k cycle frequency. On the return path, the frequency will
increase in a time constant which slows it down, thus calculating the
dielectric of the ground path.
Today, mining and oil companies use this method to determine what lays at
different formations.
This science is call Magnetic Ground Detection or is also use a Magnetic Air
Detection which sometimes is call M.A.D Science.
Roland
----- Original Message -----
From: Peter C. Thompson via EV<mailto:[email protected]>
To: [email protected]<mailto:[email protected]>
Sent: Monday, October 12, 2015 9:16 AM
Subject: Re: [EVDL] How to learn to love stoplights and your electric car
The standards for this "semi-dynamic" charging have not seriously
begun. We are only working on static charging right now. Of course,
there are experiments to test out dynamic and semi-dynamic charging,
there isn't anything set up yet for the command&control.
The other thing this article oddly leaves out is the cost. Adding in
inductive charging systems to stop lights is not going to be cheap. So
this leads to the really important question: who's gonna pay for this? :)
Cheers, Peter
On 10/12/15 12:45 AM, brucedp5 via EV wrote:
>
> http://muscatinejournal.com/news/opinion/how-to-learn-to-love-stoplights-and-your-electric-car/article_78d9def2-327e-5785-b676-54f93da923af.html<http://muscatinejournal.com/news/opinion/how-to-learn-to-love-stoplights-and-your-electric-car/article_78d9def2-327e-5785-b676-54f93da923af.html>
> How to learn to love stoplights and your electric car
> [20151002] • Llewellyn King
>
> Ever thought you’d be pleased to wait at a stoplight?
>
> Well, the day is coming when the stoplight may also be a refueling point for
> your electric car. It won’t be the key point, but it might give your car a
> little boost until you get home, or to your parking garage or the
> supermarket.
>
> Electric cars are much in the news these days, as the big automakers like
> Mercedes and General Motors try to catch up with the space, and notoriety,
> that Elon Musk and his Tesla Motors occupy.
>
> But the bugaboo for electric cars, whether they are the super-refined Tesla
> or the more utilitarian Nissan Leaf, is charging. Batteries are getting
> better all the time, but they still need frequent charging. You wouldn’t
> want to try to go any distance without planning ahead for where you can plug
> in, whether it’s a high-speed, high-voltage charging station or a wire
> coming out of a kitchen window, which would need about eight hours to get
> you ready to speed off with that legendary electric car acceleration.
>
> Electric cars have been the dream of automakers since the first cars, some
> of which were electric, but the limits of lead-acid batteries doomed them to
> very narrow uses. When I lived in Britain, milk delivery vehicles, called
> milk floats, were electric; and Harrods, the great London department store,
> used electric delivery vans for decades. In this case the slow-moving,
> use-specific and very distinctive vehicles possibly were as much for
> advertising as anything else. Customers wanted to have them pull up at their
> homes, suggesting that they could afford the substantial prices that are
> still part of the mystique of Harrods.
>
> Over the decades, many new battery types have been tried, including some
> very far-out ideas like the aluminum-air battery. But the best, so far, is
> the lithium ion battery, a version of which you have in your cell phone or
> your computer, and which powers both pure electric cars and the electric
> component of hybrids such as the Toyota Prius.
>
> But there’s still the pesky issue of charging. A Nissan Leaf has a range of
> about 100 miles, and a Tesla Model S Performance car’s range is 265 miles.
> The test comes on a cold, wet night when you’re throwing everything at the
> electric system in addition to propulsion. Get it wrong and your only way
> home is by tow truck.
>
> But the technology is on the way. The limits, as in so many things, are not
> on the technology, but the institutions that will bring it to market. Anyone
> want to make a business of car charging?
>
>
> The technology, where the power is delivered by magnetic field without a
> direct connection to the wires, is called induction charging. You probably
> use it if you have an electric toothbrush, or a phone that charges in a
> cradle. Scaled up, it can be used to charge cars without a hard wire: a car,
> or other vehicle, drives over a plate in a parking lot or at a stoplight in
> the road and, miraculously, charging begins.
>
> The Department of Energy’s National Renewable Energy Laboratory in Golden,
> Colo., is working on induction charging; and in South Korea, the technology
> already is in use for buses. The South Koran buses charge, among other
> places on their routes, at bus stops. While the bus is loading passengers,
> it is also fueling. Very cool.
>
> Nikola Tesla, after whom the car is named, was the Serbian-American genius
> who briefly worked with Thomas Edison before selling several patent rights,
> including those to his alternating-current machinery, to George
> Westinghouse. Tesla claimed he’d found a way of distributing electricity
> without wires. But how he’d planned to do this remains one of science’s
> biggest mysteries because he left no plans when he died in 1943.
>
> It is fitting that Tesla, in some small way, may be vindicated as electric
> vehicles named for him could be among the early beneficiaries of wireless
> charging.
> [© muscatinejournal.com]
>
>
>
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