The Plugless system from Evatran uses inductive technology to transfer power wirelessly. When the Parking Pad on the ground aligns with the Vehicle Adaptor (installed on the vehicle’s undercarriage) the system awakens and automatically transfers energy across an air gap at power level consistent with those of a Level 2 charger. (Source: Evatran)
This is all nice and good and for sure technically feasible. BUT, what are the potential health effects of the leakage energy, which is significant when we are talking about 10kW RF transmitter, like some of the systems mentioned here. Should we not conduct very thorough studies on that and allow these systems to be sold and used only if it was conlcusively proven by INDEPENDENT studies that it is harmless to human health? If we find out that these wireless charger systems are dangerous to our health after many are in operation (the probability of which is quite high in my opinion) then it will be much more diffcult to ban them against the finacial interests of the manufacturers and their well funded lobbies. For once we should plan ahead and do this right. I do not belive that this is too much to ask for.
We have the J1772 plug in standard and SAE Combo for DC quick charging. Stop and smell the Roses , that is enough variety. We Just don't don't need wireless EV charging. Like I have said to the ones who want the car driven by a computer, instead just hire a Chaufer and make a job for a homeless unemployed person and for less than the $50,000 per year for a computerized self driving car.
When driving BIG trucks (Semi) often the driver's window has a crank but the passenger window is electric so we can listen for the train at "Grade Crossings" and usually we are driving alone. Similarly electric mirror adjustments allows a better view when backing up. Door locks are better security for keeping unwanted riders in the truck cab. Electric garage doors increase home security as you won't let the "Bad Element" inside. But why don't they put a spout on the pump and a fuel inlet port on the top of the front fender to refuel your petrol ?
Wireless charging? We waited for many years before the fire-marshalls decided we could pump our own gas into our car, now you feel drivers would prefer to wait an hour to charge instead of pluging in a single plug that is standardized already. Open a little door, plug in and walk away, it is much easier than a "Jump Start for a dead starting battery" and the first picture (Or second ) says the interface tells the car it is plugged in.. But, if the EV is plugged it it won't start, (Safety regulations require that!) So how to unplug a car that is just sitting above the wireless unit? (These descriprions are often erroneous...) Also out of eleven slides about five were for wireless charging your phone not the car? When are they going to make all the appliances in the home wireless? I tire of buying "AA" batteries for my moustash trimmer. One commenter complained of recharging more than once a week? They must only buy fuel on saturday? My car charges at night when I am home parked in my garage or carport plugging in the car takes seconds. I only visit the fuel retailer when I need a gallon of milk. (That is usually on Saturday. For those who need asistance with plugging their car in I have recomended that nicer places should offer Valet Parking with Recharging as part of the service. A lot of advantages there and few drawbacks. Would you pay $2 to be parked and recharged for 1/2 to one hour then have the car brought around to the exit of the grocery store or Mall? Now that is convenience, think about at the clinic, Hospital, Theater, or Restaurant...
I view this as being in the same category as power windows, door locks and maybe even garage door openers. For many years, I could never imagine why I would need a power window or a power door lock. Or even a garage door opener, since I am physically able to do all those things without help. Somehow, though, all of those things have crept into my life, even though I never asked for them (my wife did want the garage door opener). The power door locks and power windows just came with the car I bought. They're standard. My point is that someone apparently wants these luxuries and they just end up being part of our lives. I think it will be a long wait for wireless car charging, but when plug-in cars take off, wireless charging probably won't be far behind.
This is just another example of the desire for convenience driving an untenable solution. The poor efficiency and safety issues have already been addressed. It just seems everyone is unhappy with anything that has a cable attached. It must be like a leash to us freedom-loving humans.
I think the manufacturere already have the plugs about as simple as they can be, as people shouldn't have to be engineers, either to drive an electric car. I think there is a standard for plugs in the works, if not already out there.
The only practical way to get efficiencies anywhere near the same as a wired power source, the stationary and vehicle coils need to mechanically line up and come together, This is doable, but will take some work. The other solution would be a set of ohmic contacts that make when you drive the vehicle onto or over them. This has some interesting engineering challenges associated with it, but could offer wired efficiency. Efficiency is going to be key to making electric vehicles truly 'green'.
The biggest problem with electric cars is still battery issues-- limited range, battery life, and inital cost. If EVs had enough range to get me around for about a week without a full charge, and cost what I can afford in payments, I would have one already.
The reason wireless charging hasn't taken off for phones and other devices is the inefficiency of charging through the air. The efficiency rating of wireless charging is between 10 and 20 percent. That's something we can live with for a phone, but certainly not a car. The cost of the electricity to recharge a car multiplied by at least 5 becomes unacceptable, and the MPGe calculations go out the window.
I agree with ChriSharek. As a fellow EV advocate and Volt owner, this is a solution in search of a problem. Get home, step out of the car, plug it in. To leave, unplug it, open the door, get in. 10 seconds is generous.
None of the touts can claim any real benefit for wireless charging except for convenience. One very seldom sees any mention of efficiency at all, and the last time I did see a description of efficiency it was all in terms that were very hard to follow. But we all know that a direct connection is usually at least 99% efficient. One other concern has been that some folks would have a problem figuring out how to plug in a vehicle. Those people should not even be allowed to drive any car, if their understanding of things in general is that poor. An EVG is an option, it is certainly not an entitlement. Nor should it ever be one.
Tesla Motors’ $35,000, 200-mile electric car may not revolutionize the auto industry by itself, but it could serve as a starting point for a long, steady climb to a day when half of the world’s vehicles will be plug-ins.
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