CR4® - The Engineer's Place for News and Discussion®


Previous in Forum: New Cars   Next in Forum: Kia Rio Sputters for Several Seconds Every Time I Fill w/ Petrol
Close
Close
Close
12 comments
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain, and now disconnecting ["brexit" - ugh] as Little England and Wales (not too sure about Wales bit, either). Kettle's on.
Posts: 26787
Good Answers: 703

Alstom Presents "Scalextric-like" Solution to Electric Road Transport

11/23/2017 8:50 AM
__________________
"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Power-User

Join Date: Sep 2016
Location: SPAIN
Posts: 181
Good Answers: 8
#1

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/23/2017 11:39 AM

To me tris looks very far inthe future. Rebuilding the roads to implement this infrastructure looks like complicated as hell, and the driving need to be so precise that autonomous vehicles would be required.

Finally, there is the safety problem. Rain means electric short circuit, and people getting out of the vehicle could get electrocuted on the road. Apart from the fact that those distances would require such a low voltage that the range would be useless.

There are so many issues with this design that I doubt it will EVER be implemented!

__________________
Building the future!
Register to Reply Score 1 for Good Answer
Guru

Join Date: Apr 2008
Location: Chicago
Posts: 2297
Good Answers: 73
#6
In reply to #1

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/23/2017 7:39 PM

Just wait by the side of the road with some BBQ sauce. You'll change your mind about this system when you taste what it has to offer.

__________________
High Tolerance is Beautiful
Register to Reply
Guru
Hobbies - CNC - New Member

Join Date: Jul 2013
Location: Lost Wages Nevada
Posts: 1515
Good Answers: 51
#12
In reply to #6

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/27/2017 4:27 PM

road kill grilled while you wait..... YUMMY.... Fried Nutria!!

__________________
Though it does seem he frequently has a Swiss Army knife or Leatherman and a roll of duct tape with him.
Register to Reply
Guru

Join Date: Aug 2005
Location: Hemel Hempstead, UK
Posts: 4182
Good Answers: 236
#2

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/23/2017 2:06 PM

I think I must have missed the bit where they said what voltage this runs at.

To deliver that much power you need either very high voltage or very high current (or moderately high voltage AND moderately high current).

To stay at a safe voltage, say 25V, you'd need to be drawing a few thousand Amps: those brushes would need to be pretty special.

__________________
We are alone in the universe, or, we are not. Either way it's incredible... Adapted from R. Buckminster Fuller/Arthur C. Clarke
Register to Reply
Power-User

Join Date: Sep 2016
Location: SPAIN
Posts: 181
Good Answers: 8
#7
In reply to #2

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/24/2017 1:14 AM

For low voltage you can deliver energy over a few meters, maybe tens of meters, but it will not work over kilometers (or miles for yankies out there).

The parasitics are too high, and the voltage drop between the brushes and the rails make the task literally impossible to work at 25V.

Unless you make it out of gold!

__________________
Building the future!
Register to Reply
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 19465
Good Answers: 1140
#3

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/23/2017 2:50 PM

I have seen in some videos of people dragging electric cars with regenerative braking to charge the batteries, so it seems it would be easy enough to make a gravity charging section in the road every so often.... a long sloping hill followed by an auto ferris wheel sort of setup would return the car to ground level....entering at the bottom and exiting at the top with an optional do-over....The wheel could be 3 or 4 lanes, maybe more...

An amusement park ride to make charging fun.....

...and while you're on the ferris wheel it could have a tire spinner that continued to charge the battery all the way back up....

__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20033
Good Answers: 753
#4

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/23/2017 3:37 PM

Lots of PR blather, few details or principles. Who gives a rip if Alstom has its own shipping depot somewhere?

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Guru

Join Date: Oct 2008
Posts: 40050
Good Answers: 1598
#5

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/23/2017 4:27 PM

Looks like "Scalextric" (second from bottom) has been around for awhile.

Register to Reply
Active Contributor

Join Date: Feb 2017
Location: Scotland, UK
Posts: 22
Good Answers: 1
#8

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/24/2017 2:32 AM

How about a short section at traffic lights, segmented so that sections not in use would not be switched on, each segment short enough to be covered by the vehicle being charged, a positioning mechanism on the vehicle to find the rails, communication with the power control to indicate 'I'm on it, switch this section on', interface to the traffic light controller to 'stop charging and retract' when the lights are going green or 'don't bother we don't have time', vehicle smarts which only charges when required, vehicle ID and link to credit card to charge for charging?

__________________
Prayer moves the hand that holds the universe
Register to Reply
Guru

Join Date: Apr 2008
Location: Chicago
Posts: 2297
Good Answers: 73
#10
In reply to #8

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/24/2017 9:12 AM

I like that idea a lot. ...except that a true autonomous roadway would not have vehicles that stop.

__________________
High Tolerance is Beautiful
Register to Reply
Guru
Engineering Fields - Optical Engineering - Member Engineering Fields - Engineering Physics - Member Engineering Fields - Systems Engineering - Member

Join Date: Apr 2010
Location: Trantor
Posts: 5223
Good Answers: 622
#9

Re: Alstom presents "Scalextric-like" solution to electric road transport

11/24/2017 7:17 AM

This might have limited use for specific installations, but I don't see this happening for public roads.

I really don't see any kind of powered road replacing the existing road system, except in isolated circumstances. The real answer will be to develop a safe rapid-recharging system, which would likely be far cheaper and happen a lot sooner.

If a powered road system was needed it would be safer to bury magnetic coils in the road surface and use induction to recharge a battery. There's no chance of electrocution, no shorting, it's safe for 'regular' vehicles to drive on, and sensors could be installed with the coils to power them on/off when an electric vehicle is over the coil to save power.

__________________
Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
Register to Reply
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 19465
Good Answers: 1140
#11

Re: Alstom Presents "Scalextric-like" Solution to Electric Road Transport

11/25/2017 3:41 PM

__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply
Register to Reply 12 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Copy to Clipboard

Users who posted comments:

DavidSA (1); Ivanov327950 (2); JE in Chicago (2); lyn (1); Original_Macgyver (1); Randall (1); SolarEagle (2); Tornado (1); Usbport (1)

Previous in Forum: New Cars   Next in Forum: Kia Rio Sputters for Several Seconds Every Time I Fill w/ Petrol

Advertisement