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Wireless Charging Roads?
- Thread starter MOE J
- Start date
Waste of money. This is going to dramatically increase road maintenance costs, while offering little benefit to road users. This is just a test section, but I have serious doubts about its scalability, long term maintainability, and value proposition.
Busses could certainly benefit from wireless charging at stops, depots and maybe in dedicated bus-only lanes.
Dumbest idea ever. There are SOOO many problems.
The amount of wire used for coils in the road would be ludicrous. Even running an extra set of high current wires the length of the road would be prohibitive.
Billing will be a nightmare, if possible at all. Driving at, lets say 30 mph(aka 44fps)(which NO ONE will do), you'll be encountering a new coil that needs to get authenticated and energized every 100ms. Sure, there can easily be SOME predictivity, maybe even a LOT, since the road has a given direction and typical speed. Even so, you need computing to deal with that, and you need individual control over about 1000 coils per mile.
The video has a van loaded with an enormous charging coil, and its going SIX whole miles per hour, and is occasionally getting 12kw moments of charge. There are ZERO private vehicles that have the space for such a coil, and even if vehicles want to add a coil at the design stage, this coil-in-road technology is going precisely nowhere. Don't get me wrong, coil-in-garage or coil-at-public-parking-space may have a future.
And of course, there's always the tinfoil hat folks who will worry about the EMF emanating from the road before and/or after the EV goes by(before, since the road needs to predict the cars arrival and energize the coil, and after because the coil shouldn't turn off until the car is gone.
The amount of wire used for coils in the road would be ludicrous. Even running an extra set of high current wires the length of the road would be prohibitive.
Billing will be a nightmare, if possible at all. Driving at, lets say 30 mph(aka 44fps)(which NO ONE will do), you'll be encountering a new coil that needs to get authenticated and energized every 100ms. Sure, there can easily be SOME predictivity, maybe even a LOT, since the road has a given direction and typical speed. Even so, you need computing to deal with that, and you need individual control over about 1000 coils per mile.
The video has a van loaded with an enormous charging coil, and its going SIX whole miles per hour, and is occasionally getting 12kw moments of charge. There are ZERO private vehicles that have the space for such a coil, and even if vehicles want to add a coil at the design stage, this coil-in-road technology is going precisely nowhere. Don't get me wrong, coil-in-garage or coil-at-public-parking-space may have a future.
And of course, there's always the tinfoil hat folks who will worry about the EMF emanating from the road before and/or after the EV goes by(before, since the road needs to predict the cars arrival and energize the coil, and after because the coil shouldn't turn off until the car is gone.
Max Spaghetti
Member
I look forward to seeing the efficiency figures.
Efficient inductive charging over significant air gaps is, as far as I know, still an unsolved problem.
Efficient inductive charging over significant air gaps is, as far as I know, still an unsolved problem.
Yep. Japan has been testing that Meet Japan's bright new idea for boosting EV range – wireless charging at traffic lights. The NHK World web page is gone but there's still a brief video up at Electric avenue | Researchers in Japan are testing a way to charge electric vehicles right from the road beneath. More short videos:... | By NHK WORLD-JAPAN | Facebook.
The video claims stopping for a second yields about 100 meters of range, 10 seconds about 1 km. Then it says vehicles typically stop at intersections for 30 to 45 seconds.
Yep. The same people ask me why the car doesn't do regen 100% of the time to enable a longer trip.
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