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Fady Mishriki

What’s the big deal about Resonant?

Fady Mishriki
Peter Clarke
Peter Clarke
9/24/2015 11:03:28 AM
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Re: That's Hot
I think you make a very good point.

The industry is so keen to add "convenience" factors to try and increase sales they seem to be blind to the important ecological implications.

 

 

 

 

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Scott Elder
Scott Elder
9/18/2015 1:55:30 AM
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That's Hot
70% effciency delivering 20W to a load means that 8.6W goes primarily into heating back-to-back coils at the surface of a charger.  That will blister a child's hand.  Wired 20W means that 750mW x 2 is spread across two distant objects.  Warm yes, blisters no.

Wireless is a convenience if one has 2-3 hours of time to wait for a charge.  Wired means 50% recharge in 15 minutes plus the 5 seconds to plug in a cable.

Smartphones are mobile devices.  There is nothing mobile about 2-3 hours of idle charging time.

I can think of only one benefit of wireless power in mobile products: sealed computing.

Isn't it interesting that on one hand we have future mandated efficiencies above 80% for wired wall chargers, but no one is complaining about 70% wireless charging efficiencies for the same purpose?

 

 

 

 

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