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Inductive charging is awesome-you can just put your phone, tablet, or any device down on a special surface and it starts charging itself. Here's how you can build that surface into any piece of furniture:
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Oskar Haeger's profile photoWill Haggerty's profile photoGarrett Graham's profile photog.p raj's profile photo
33 comments
 
While inductive charging sounds very nice, it's also terribly inefficient. So we get led-lights and other things that will help us reduce our power consumption, and then charge our phones through this? Doesn't make sense to me, except perhaps as an emergency charger in an airport or similar.
 
+Oskar Haeger Once other companies work hard at this tech. then the charges will become more effective with time. Imagine a road surface that charges an electric car as it is driving along. Only possible if you start small.
 
That mentality is what stops innovation. Why build something when its more costly. Why go to the moon? Or spend money researching anything for that matter. Why create HD TVs when CRTs have higher resolutions. Its a way to move forward as people use these new technologies. The science to make inductive charging efficient is getting better it doesn't mean we shouldn't use it. Why buy a new car today when ones from years ago go better mileage
 
they already have that and its not that expensive
 
Oh yeah, but what about your "balls". Too much magnetic fields already around us!!!
 
+Darren Clarke unfortunately it will always remain inefficient, because magnetic fields are not point forces or charges, but fields as stated, and thus huge losses in efficiency just due to volume.

I do not see a solution and neither has anyone else, which is what remains the problem.
 
+Mike Blakely-Armitage is completely out to lunch.  Here is a partial list of citis in North America that use similar technologies for public transportation:  Toronto, Boston, New Orleans, Newark, Seattle, Philadelphia, Pittsburgh, Memphis, Portland and Little Rock.  

Other cities, such as Vancouver, Edmonton and Dallas, use a light-rail system that is faster than street cars but requires dedicated lanes.

Of course, many more cities have subways and other forms of heavy rail infrastructure that compete directly with those evil cars.
 
Inductive charging is the future. One of the few obvious ways to cut the cord. We already have wireless transfer of files and wireless display of pictures, why not charging too? Obviously it makes sense.
 
I would also like to add that uncontrolled magnetic fields like inductive charge stations are not good for electronics or storage magnetic devices (credit cards, hard drives, list goes on).
 
I don't oppose new innovation, and as I stated, I can see some uses for this technology. Charging an electric car while it's driving is absolutely one such application. I read something about it last spring (http://www.powercircle.org/se/display/PowerCircle-i-media/testvag-for-elbilar-byggs-vid-arlanda.aspx) but you might need google translate for that article. Just the thing your were talking about +Darren Clarke .

However I don't see the point of charging a device, which already will be quite stationary, in such an inefficient manner. Except for perhaps a public place where you could charge your device while waiting for a plane/bus/something, where it wouldn't make sense to have a lot of different adapters.

Use the right tool for the job, and wasting a lot of power because someone can't be bothered to plug in a device in a socket clearly isn't the best way to use our resources imho. Find good applications and apply the solution there, don't try to fit it in where it has no place.
+Rohi Zacharia 
 
i like how technology makes some people look like the hunchback of notrredame
 
The principles at play are the same as any transformer. To be more efficient, the cores have to be closer together and have a low reluctance.
 
+Oskar Haeger is inductive charging that inefficient? Transformers are generally very efficient, so it depends on how big the gap in the inductive circuit is. I accept it won't be as efficient as a plugin charger, but close coupling should minimise losses.
 
+Figueroa Johnathan : already doing it with hv electricity and pilot/fibre optic cables so perhaps they can combine/integrate this road technology somehow
 
+Andrew Weekes Not sure where they are at the moment, but I've heard the range 50-70%. In a phone where you could just as easily plug it in, wasting 30+% just doesn't make sense. In an electric car, it would, since your normal ICE only is about 30% efficiency or so, and it's quite hard to plug in, especially while moving. While parked in your garage you'd want to plug it in I think.
 
 
+Garrett Graham I m talking specifically about the induction principles being used. This is how the current is being transfered from the pad to the device.
 
+William Haggerty yeah my concern and always has been with induction to charge batteries is inducing current in the wrong component, essentially frying different transistors,capacitors, and chips. This isn't an issue when you have a long wire or rail with EVs.
 
+Mike Blakely-Armitage please specify via number what you mean by efficient, because inductive power is not efficient by any comparison to connected power.
 
+Mike Blakely-Armitage efficiency is and always will be (power output)/(power input), that is the definition there is no other, and is the power output worth the power input. If it takes wastes a lot that is not efficient and not easily accessible. Even "logistics" wise, as people still have to design all of the equipment and put it in. The alternatives are much easier and more efficient than inductive charging, especially cost wise.
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