Here we go again - Page 1
Forum section: electronics / general

author: SF
author_rank: Newbie
timestamp: April 07, 2024, 06:44:07 pm
content: Hi all,I thought that this was a 1st April joke... It is not"Building the first highway segment in the U.S. that can charge electric vehicles big and small as they drive""Construction to begin on test bed in Indiana to develop wireless charging for electric vehicles traveling at highway speeds"https://www.purdue.edu/newsroom/releases/2024/Q1/building-the-first-highway-segment-in-the-u.s-that-can-charge-electric-vehicles-big-and-small-as-they-drive.htmlAre they flogging a dead cow again?SF

author: SiliconWizard
author_rank: Super Contributor
timestamp: April 07, 2024, 09:59:50 pm
content: There's a truckload of money to be made there as long as you have low ethics.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: April 07, 2024, 10:57:43 pm
content: At least this doesn't violate physical laws, the governors ignorant comments notwithstanding. It is hard to see how it makes economic sense. It isn't obvious to me, one way or the other.

author: CaptDon
author_rank: Super Contributor
timestamp: April 13, 2024, 01:55:44 pm
content: It only makes sense when the numbers are crunched by the same government who thought consuming 900,000 gallons of petrol to produce 1,000,000 gallons of ethanol was a win-win positive outcome!!! Too stupid to realize the total consequences of having burned 1,900,000 gallons of total carbon footprint fuel or the absolutely stupid consequence of adding 10% ethanol to gasoline also generates a 5% loss in fuel economy!!! But I see government sponsored 100 tanker car ethanol trains come through our town every day. As long as some worthless piece of shit is getting free government money they will keep telling 'advisors' to the politicians that it is a win-win!! Look at our transportation secretary, he doesn't have a pilot's license or a CDL but enacts rules 'proposed' to him by tax dollar leaches and he doesn't have the personal expertise to filter out the noise!!! Your government and your tax dollars at waste!!! Kind of like when Powell was head of the F.C.C., he couldn't identify any component of an R.F. circuit but was in charge of the rule making concerning R.F. circuits!!

author: Nominal Animal
author_rank: Super Contributor
timestamp: April 13, 2024, 02:15:21 pm
content: Quote from: CaptDon on April 13, 2024, 01:55:44 pmIn Iceland?! (Based on your current flag.)

author: mariush
author_rank: Super Contributor
timestamp: April 13, 2024, 03:12:54 pm
content: I assume it's gonna be horrible efficiencyPowering using fixed lines above would be cheaper :https://www.wired.com/2017/03/running-delivery-trucks-trolley-wires-isnt-crazy-sounds/I see just a couple issues with the above.. would have to be quite high up or you won't be able to do oversized (too high loads) and at least in US you'd no longer be able to land on highways in an emergency.Article suggests use near shipping ports... i can see trucks moving shipping containers from port to locations 20-50 miles around the port.Billing for the electricity could be an issue, but I suppose some kind of black box could log when truck starts charging and how much it takes in and send info by sms/internet to the company that manages the particular segment of power lines... you'd have to trust nobody hacks those devices (or maybe random weight scale places could also access the black box and check i guess, or put cameras on poles and have the black box in truck broadcast an ID to pair the photo with a black box id - any truck that pulls power and broadcasts no id means stealing electricity)

author: CatalinaWOW
author_rank: Super Contributor
timestamp: April 13, 2024, 05:35:14 pm
content: Quote from: mariush on April 13, 2024, 03:12:54 pmOverhead lines are cheaper for a limited routes in high traffic areas. It all comes down to how many kilometers can be transferred per charging station. If that number is large the wire costs of overhead will exceed the charging station costs. Other factors that are either unknown or hard to determine include maintenance, weather issues, and route service. For a simple example of how this affects cost compare a linear route between towns with a "node" configuration serving all roads in a town within within range of the charging station. In the linear case wire cost rises linearly with route length as does charging station cost. In the "node" case wire costs are proportional to town area, where charging station cost is not a function of the linear road distance, but something related to town radius and traffic density. This simple example of the complexity still oversimplifies. A wired solution allows essentially unhampered route planning within the wired network. The "node" configuration requires periodic passes past the charging location, but does allow for "off road" trips into driveways, parking lots and warehouses.One obvious thought is a hybrid solution, with the nodes being overhead wire routes instead of wireless transfer.One thing no one mentions in these comparisons. Many alternative energy solutions are facing headwinds for aesthetic reasons. I am sure this is a factor in this case also.

author: CaptDon
author_rank: Super Contributor
timestamp: April 14, 2024, 02:18:04 pm
content: Living on the 'North Coast' of the U.S.A., Lake Erie region. Heavy rail traffic along the 'shoreline'. I was a Purchase Services Agreement (PSA) contractor to a locomotive manufacturer in the area for the past 12 years. Retired now. Sticking around just for the fun.

author: Marco
author_rank: Super Contributor
timestamp: April 14, 2024, 04:54:38 pm
content: If you don't mind the kV voltages and obliterating some long wave spectrum capacitive could be doable.Roads are expensive, electronics are cheap. Some metal film below the road surface and some electronics every 10+ meter will hardly make a dent on road costs. It's the Litz coils which make wireless charging roads expensive.

author: Rick Law
author_rank: Super Contributor
timestamp: April 15, 2024, 06:33:25 pm
content: Quote from: Marco on April 14, 2024, 04:54:38 pmDon't forget the maintained cost, both in dollar terms and in pollution. Digging up the highway to do any electronics/electrical repair is not going to be cheap. The cost goes up significantly in heavily traveled road.

author: SiliconWizard
author_rank: Super Contributor
timestamp: April 15, 2024, 06:39:34 pm
content: Quote from: Rick Law on April 15, 2024, 06:33:25 pmYes, but that makes money circulate.

author: Marco
author_rank: Super Contributor
timestamp: April 15, 2024, 07:28:08 pm
content: Quote from: Rick Law on April 15, 2024, 06:33:25 pmWe have a lot of intentionally porous asfalt here, needs to be resurfaced every 10-15 years any way.After surface grinding, grind some parts a little deeper to embed the foil and cables.

author: EEVblog
author_rank: Unknown
timestamp: June 11, 2024, 11:11:44 pm
content: Quote from: SiliconWizard on April 07, 2024, 09:59:50 pmBingo.

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 12, 2024, 12:42:03 pm
content: Quote from: mariush on April 13, 2024, 03:12:54 pmThe simple solution is to only put up the lines above a toll road.