Transfer of charge wirelessly via inductive coupling

@PeterH:

A couple of organisations have been developing ways to transmit low power wirelessly over distances from a few inches to a few feet and working solutions have been set up in carefully controlled situations but it's an extremely difficult problem to solve and the most promising approaches seem to use radar-like directed and focussed transmission of EM radiation with a lot of clever feedback to maintain the connection. It's possible but it's very hard and there are no commercially viable solutions available yet.

Yes, I believe you are correct in this statement, to my knowledge and I attempt to stay reasonably knowledgeable with the publications of works in the field. But the context, I believe, for "commercial" is that of a larger picture and does not include the niche market of such things as inductive chargers for cellphone recharging stations and other small consumer electronics.

This link discusses the overall efficiencies of wireless:
http://www.wirelesspowerconsortium.com/technology/total-energy-consumption.html
Assumption-Summation:

You see that the total energy consumption is comparable. Although wireless transfer is not as efficient as a direct contact charger, wireless power transmitters save standby power energy when the wireless transmitter replaces multiple external power adapters.

This is VooDoo mathematics! Just look at the to-market up-charge of the (accessory) device for connection to the mobile device. There is no cost recovery whatsoever. This alone puts me on Peter's "noncommercial" team. It does not, however, mean it may not be great fun to play with...

Ray