Yes, but this system is unique because if you can tune the system to a great deal you can achieve efficiencies over 80%. So what if there is 20% loss, the convenience afforded by such a system to rid of wires and cables is a much greater benefit in my opinion. Having your cellphone charged while going to bed without having to manually charge it, or putting your laptop on a piece of furniture like a desk with embedded wireless power transfer technology is the main reason why people like myself and others have pursued this topic. You can say all you want about its safety and inefficiencies, but with careful design and some optimization these are taken care of. Tesla didn't do something like this, Tesla basically rocked the world with massive RF power (mainly the electric fields associated) and was able to power stuff over 28 miles away. That's dangerous and will obviously have negative effect on humans and possibly equipment as well. This system only involves magnetic coupling with the phenomenon of resonance so for an appreciable short distance like a typical room diameter or embedded into a desk where the laptop maybe 10-20 cm away where the conventional transformer would fail, this is where this system places its mark. The system my team and I are designing right now only considers optimizing the sending and receiving and we are not interested in the inefficiencies up until the driving coil. That is in itself a project all together. We have limited time and a mere $700 budget to do this so this is the best we can do for now.

 

Yes, but this system is unique because if you can tune the system to a great deal you can achieve efficiencies over 80%. So what if there is 20% loss, the convenience afforded by such a system to rid of wires and cables is a much greater benefit in my opinion. Having your cellphone charged while going to bed without having to manually charge it, or putting your laptop on a piece of furniture like a desk with embedded wireless power transfer technology is the main reason why people like myself and others have pursued this topic.

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Simply toss your phone on the pad each night.

 

Yes, I'm aware of these designs as well. They're not quite what we're trying to do. The distances with these pads is basically the distances associated with a transformer. If I have to walk to put my phone on a pad I might as well plug it in. The system we're working with has a much larger distance of coverage so you can walk into a room or place it anywhere and it would work. The applications of mid-range wireless power transfer is much greater than those regular induction type pads.