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Extending The Range of Electric Vehicles By En-route Induction Charging.

08/06/2008 12:38 AM

It is probable that I am violating some fundamental principles in making this suggestion.

I didn't have a good grasp of the technical challenges back in the 70's when I first became aware of this possibility and I still don't. That is why I am here. I know there are folks here that know this stuff.

Wheeled Vehicles:

I wonder if it would be possible to charge an electric vehicle by induction while it is moving. Where one or more lanes in each direction of the Interstate and other major roads have a low voltage induction cable just below the surface. This cable would be used to supply a rate changing magnetic field used to induce power in the charging circuit of the vehicle without physical contacts. In widespread application, this would extend the range of an electric vehicle to infinite value where the vehicle operates on battery stored power when operating on short trips (>100 miles) off the grid. The circuit would be part of the commercial power grid with the power metered at the vehicle.

Could the acceptance of the charging circuit be increased by super cooling the inductor?

What are we talking in terms of field change rates required to induce usable power through a distance of let's say - .05 meters?

Remember we could pull peak power demand of the vehicle off the vehicle storage device and allow charging at a near constant rate.

In my simplistic understanding the grid voltage would be stepped down before entering the transportation circuit and then stepped up again before being fed back into the commercial load grid. The purpose for this is to increase the ampere value (field) of the charging grid.

In widespread usage the instantaneous demand on the grid would vary quite slowly as vehicles moved on and off the grid.

The down side; because we use so much energy in transportation, it would require a very dramatic increase in power production capacity. Hopefully this increased demand for electrical energy could be somewhat offset with solar and wind power using hydro-storage technologies for meeting peak demand periods.

Would it be possible to reduce the carbon footprint of current transportation technologies in this way?

Electrical power production and distribution is notoriously low in efficiency, but because this technology may lend itself well to power averaging and regenerative braking; it may not be that crazy of an idea.

Airplanes:

I believe we should be flying 1/2 inch off of an enclosed guide-way instead of at 30000 feet. This would not only allow us to radically increase efficiency; but allow us to use electrical power instead of petroleum based fuels. Could this be accomplished by using electro-fan and aerodynamic lift in an enclosed non-evacuated guide-way. This being the first incremental step with the final evolution being the use of electromagnetic lift and electromagnetic propulsion in evacuated guide-ways?

So what do you folks think? I'm here to learn, don't worry about hurting my feelings or forcing me to a text book. I may be getting old but I am still on the learning curve.

Gavilan

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#1

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/06/2008 1:02 AM

Hello Gavilan

Wheeled Vehicles:

High strength magnetic fields are damaging to body cells, and there appears to be no practical way to have sufficient "Power by induction" into a fast-moving wheeled vehicle, which does not permanently damage the occupants in that strong magnetic field.

Electric Power:

Production via Hydro-power, Wind-power, Tidal-power, Solar cells is now reasonably efficient: Apart from construction, manpower, and maintenance costs, it is all free.

Electric power production from fossil fuels - Coal, Natural gas, oil, is not as efficient, and plunders the planetary energy Bank.

Electricity Distribution is quite efficient, particularly at EHV, 250kV and above, as the line voltage increases, the efficiency increases, albeit at increased cost of transformers tower spacing increases, insulators.

Airplanes:

Maglev devices have the magnetic field "bad for people" problem as per the Wheeled Vehicles".

Jet engines and airplanes using them become far more efficient flying at 30,000 feet and above.

General:

I realize there are commercially operating Maglev trains and such.

Magnetic field damage does cells damage, even at low intensity levels, but may take several or even many years for the damage to become obvious, by which time it is far too late to do anything about it.

If you value your good health, then steer well clear of high-level magnetic fields, of every sort.

If you are truly an older person, 60+, then it won't really matter your being exposed to high-strength magnetic fields, because statistically speaking, you are on a "downhill slope" regarding your health, as your cells have telomeres on the ends of their chromosomes, and after the telomeres are used up, and there is none left for cell repair, that cell dies suddenly.

That is why scientist are able to state that for each type of cell, for each species, there is a pre-designed number of cell divisions possible, before sufficient cells die in that creature, and it dies.

But also remember that the human body is designed to live for approximately 120 years, but we expose ourselves to all sorts of damage, which shortens the lifespan.

Kind Regards....

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#2
In reply to #1

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/06/2008 1:24 AM

Hey Sparky!

Lets say we can shield the occupants.

Please explain to me why it makes a difference if the vehicle is moving. Assume a 60 hz field.

Gavilan

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#3

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/06/2008 2:44 AM

Re Airplanes... landing would be less hazardous

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#4

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/06/2008 4:42 AM

So what's wrong with the Scalextric Technique, of collecting the power from a contact system?

  • Electric trams use this approach
  • Electric trains use this approach
  • The road vehicles in "Demolition Man" used this approach in the year 2037.

The problem then becomes simply one of energy storage density (or the number of kWh stored per tonne of overall vehicle weight):

  • NaS batteries?
  • Super high speed flywheels?
  • Electrolysis of water to store hydrogen?
  • What else?
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#5
In reply to #4

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/06/2008 11:21 PM

Compressed air?

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#7
In reply to #4

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/07/2008 11:03 AM

Life-size slot car tracks...well, why not? Wouldn't have to involve more than trunk roads, stored battery power could get you from there to your driveway and back. Probably the biggest problem would be retrofitting in the case of upgrades/changes.

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#6

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/07/2008 9:24 AM

I realize this is a "technical" forum, so I apologize for not addressing techical issues as others have done so well.

Biggest downside of the proposed system is economic. The "simple" overhead wire system used in trolley cars and light rail trains is a high cost item to install and operate. I can picture the induction system as being more expensive to install and operate.

And once it is installed, these power systems are fairly inflexible to move to a different location. The majority of operating transit systems always seem to have problems operating profitably without government subsidies (taxes for you and me).

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#8

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/07/2008 11:58 AM

But why not keep the 200 mile range and slot car recharging systems on the highways for x miles every so many miles. Even have a charging lane with a set speed say 55mph so multiple automobiles can use it.

Weigh scales or rest stops are about the right distance apart in the North West.

So leave the house with a full charge and travel 100-150 miles then pull onto the charging lane to top off the batteries and continue on your way.

Lots of details and standards to work out, and expect oil money to find every cult/group that opposes this idea for whatever reason.

Brad

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#9

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/07/2008 12:55 PM

I think others have addressed some of the problems with power transfer via induction: if the gap is large, then the field strength has to be extremely high: efficient transfer requires the the primary and secondary be in very close proximity. There are also issues with mechanical drag from magnetic coupling. (Use permanent magnets mounted in the pavement to generate power in car-mounted coils: suddenly, you've created a perpetual motion machine.) Typically, this involves a tremendous amount of copper for coils, health risks, damage to magnetically sensitive equipment, etc. Some of these risks can be overcome, and there have been prototypes of inductive systems like this, but the systems end up being very costly, albeit attractive from a more theoretical basis.

How about power transfer via high power lasers?

I'd like to see a slot car system. With a small onboard battery pack, you'd have energy for lane changes, for neighborhoods, etc. I suppose the slot contacts could be segmented, with each segment supplied by electronic switching so that the segments are on only when a vehicle is sensed as being above. This would reduce the hazard to pedestrians, as would a low voltage system, in which the long distance distribution is at high voltage, but in which local segments would be supplied by transformer every few hundred feet.

There are a gazillion possibilities for systems like this: given the state of the art in high-charge-rate prototype batteries, a system could be developed that would charge vehicles at intersections, or at pull aside charge lanes (like HOV lanes) at points along highways... maybe.

An electric vehicle designed for 5 mile or 10 mile range can, right now, (today!) be a really excellent vehicle: fast, quiet, light, more reliable, etc, with emissions about half that of current efficient cars (even given the primitive state of our mainly fossil fuel generating systems). It's only when you load down electric vehicles with tons of batteries and hope for long range, that problems such as astronomical cost and weight surface.

Of course, perhaps something like the EEstor will materialize -- although the EEstor seems scammier (stock pumping) as time goes on. If an EEstor-like unit were available, then our woes would be over -- the battery problem essentially disappears.

One hindrance to getting the funding for prototyping a slot car (etc) system on a small town or city level would be that many people will say: Why install all this infrastructure when we know the battery technology will improve enough to make the system obsolete soon?

How about hydrogen (wash my mouth with soap!)? We develop a burst mode electrolysis, in which a bang goes off and water is converted to high pressure H2 and O2, enough for 2 miles via fuel cell*. Every mile or so cars move over ultra high amperage, low voltage plate contacts (=/- 2 volts) -- safe to walk across in bare feet. Bang! Recharged.

* I am going to regret having mentioned this: The next HHO scam is going to be for a device based on "burst mode electrolysis, as promoted by engineers on CR4." "The incredible power of burst mode electrolysis can actually blast hair out of your skin, as can be seen in spas! Static electricity, which gives LIGHTNING its power, can only make hair stand up. Our rentacrank PhDs say "Burst mode electrolysis makes lightning seem like a child's toy, in comparison."

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#11
In reply to #9

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/09/2008 12:38 AM

Hello Blink

from me

Great explanation, and fine prose, as is your usual style.

Kind Regards....

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#10

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

08/07/2008 7:36 PM

If you have an electromagnetic field in the road surface (and permanent magnets in the vehicle) then you have a linear motor where "torque" would be proportional to the gap between your magnets and the field in the road surface. Don't bother wasting the inefficiency of charging the batteries.

Infrastructure costs for such a system would be HUGE, but the "alternate" suggestion gets the thought processes going.

There's always the questions in the background. Feasible? (Yes) Practical? (Not with current economic considerations) Serviceable? (Not realy with the conductors embeded into the road surface.) Safe? (I would not like to be inside the necessary magnetic fields for a few minutes.)

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#12

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

01/26/2012 1:11 PM

There is never a violation of fundamental principles in making any suggestion.

Possibility? You'll see it when you believe it.

Every technology, every idea, every invention began with a thought. A thought coupled with vision and perseverance prevailed where the thought manifested into reality.

Henry Ford proposed The car (horseless carriage)
"The horse is here to stay but the automobile is only a novelty, a fad" said the president of the Michigan Savings Bank advising Henry Ford's lawyer not to invest in the Ford Motor Co, in 1903

Wright brothers-Airplanes
"Flight by machines heavier than air is unpractical (sic) and insignificant, If not utterly impossible" said Simon Newcomb; The Wright Brothers flew at Kittyhawk 18 months later.

Radio
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to no one in particular" Associates of David and Sarnoff responding to a call for investment in the radio in 1921.


OUTSIDE THE BOX
It can really do that.

Charge an electric vehicle by induction while it is moving. Where one or more lanes in each direction of the Interstate and other major roads have a low voltage induction cable just below the surface.


"High strength magnetic fields are damaging to body cells, and there appears to be no practical way to have sufficient "Power by induction" into a fast-moving wheeled vehicle, which does not permanently damage the occupants in that strong magnetic field."

Lets say we can shield the occupants.

"Biggest downside of the proposed system is economic. The "simple" overhead wire system used in trolley cars and light rail trains is a high cost item to install and operate. I can picture the induction system as being more expensive to install and operate."

"Revolutionised wiring systems and conductor technology overcomes the economics of energy transmission."

slot car tracks

periodic slot car recharging systems

"If you can imagine it...it already exists"

Continue the passion to dream and present ideas.

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#13
In reply to #12

Re: Extending The Range of Electric Vehicles By En-route Induction Charging.

03/24/2013 1:07 PM

Thank You.

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