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JEastlack
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I wouldn't bet on it.
JEastlack   3/13/2014 5:20:03 PM
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The problem with magnetic flux coupling is keeping the surface of the secondary coil precicely perpendicular with the magnetic field lines. The less perpendicular, the less coupling and thus wasting energy. I am not sure this is a cost effective way of charging devices, this sounds like a step in the wrong direction. Besides that, where is the data from the study of how this will impact human health or is that not important? 

Kinnar
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Wireless Charging will be getting improved soon
Kinnar   3/14/2014 5:18:44 AM
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Looking at the figures estimated and the aggressiveness of the mobile phone manufacturers it will be really giving a lot boost in the technical development of the wireless charging technology, yes there are many demands in terms of further development in this technique, but looking at the scope of the deployment it seems that this will open many new avenues in the field.

tpfj
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Re: I wouldn't bet on it.
tpfj   3/14/2014 11:27:34 AM
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This is exactly why there is a push to resonant charging. I'm afraid your bet has already been waged and won.

Jessica Lipsky
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Re: I wouldn't bet on it.
Jessica Lipsky   3/14/2014 12:43:35 PM
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I as understand, there aren't any overt health risks to magnetic induction/resonance charging or RF. But information on health might  go the way of cell phones - no one will admit anything.

suntan
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please fix the math.... there is no 40 fold growth
suntan   3/14/2014 12:50:54 PM
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can we learn some math before writting articles, 40 fold is 2**40, that is trillion time growth.  Simple mistake like this simply put the value of this article to absolute 0.

 

 

JEastlack
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Re: I wouldn't bet on it.
JEastlack   3/14/2014 2:37:33 PM
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Jessica,

I wasn't trying to bash your article, just the technology. Just because something can be done, doesn't mean we should do it. The experiments that I have seen have a very low efficiency rating at around 50% at a close distance. One of them shows a 60W light bulb only a few feet away that requires 120W from the source. Now consider inverse squared law and that people might not want to use their devices close to the source, the efficiency will be somewhere much lower than 50% and probably near 5-10%. We are in the middle of a global energy crisis and this is the innovation that the public wants pushed?

There are many documented adverse health risks associated with electromagnetic radiation. It all depends on the frequency, the distance from the source, and the power level. Let's use a microwave oven for example, they operate at 2450 MHz but are strictly regulated to 5mW of microwave radiation per cm^2 @ approximately 4 cm from the oven surface. The inverse squared law takes care of the rest, but it is that same law which diminishes the efficiency of wireless power and thus making people decide if they want to be close to a radiation source to improve the efficiency.

Regardless of the frequency, this radiation causes "electric dipole moments" in every atom and molecule in our bodies causing them to change alignment at a rate consistent with the chosen frequency. I am not sure that changing every household, diner, and coffee shop into an energy wasting microwave oven is the best course of action for the world. 

Unfortunately, "TPFJ" is probably right. Too much money has been invested and is at stake for the proponents to hang up their hats and back out now. 

Jessica Lipsky
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Re: please fix the math.... there is no 40 fold growth
Jessica Lipsky   3/14/2014 4:13:59 PM
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40-fold is an IHS number, but using fold instead of "times" is correct: http://www.merriam-webster.com/dictionary/-fold

Thanks for keeping me on my toes, though.

Terry.Bollinger
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Charging Chagrin
Terry.Bollinger   3/14/2014 4:20:36 PM
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OK, time for some self-humiliation: I saw the title to this one and immediately thought "What!?! Phone companies are already making out like bandits, and now they're going to charge us 40 times more??"

suntan
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Re: please fix the math.... there is no 40 fold growth
suntan   3/14/2014 4:22:53 PM
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how is fold the same as 'time' ?!  Just try this, take a sheet of A4 paper, fold it 10 times (if you can), count the layers.

 

I can accept that people outside of fields that deal with number think that way, but this is EEtime.

 

 

Terry.Bollinger
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Re: please fix the math.... there is no 40 fold growth
Terry.Bollinger   3/14/2014 4:33:05 PM
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Uh, folks...

If you look up "twofold", "fourfold", or "fivefold", "eightfold", whatever, in any dictionary, you will see the numeric part number means times, not power of two...

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