| T O P I C R E V I E W |
| umeshmate |
Posted - Mar 30 2009 : 03:35:44 AM
how to transfer electricity by an wireless send me notes, project, or guide. i want to work on it my email:umesh.mate01@gmail.com |
| 4 L A T E S T R E P L I E S (Newest First) |
| Aaron Cake |
Posted - Apr 11 2009 : 11:09:18 AM
60% efficient isn't very impressive. 80% isn't really impressive either. So really, it would only be useful for charging laptops and cell phones. |
| symmetry.breaking |
Posted - Apr 09 2009 : 2:53:23 PM
You guys haven't been paying attention to Intel and MIT lately, have you?
They're using resonant inductors and near-field evanescent coupling to transmit power over several meters at about 60% efficenct! In a recent demo the lit up a 60w INCANDESCENT bulb, coupled to one of their resonant antennas, across a stage!
They call it WiTricity. Pretty. Freaking. Cool.
Tesla would be proud, he was on the right track, and maybe only a few steps away - after all it is the basic concept he was working on, just taking advantage of 100 years of development in precision and the development of the same basic system to power RFID tags in the 80's.
The ideas behind developing this technology is that, if they get the efficiency up over the 80% range or so, we can charge our cell phones and laptops just by being in the same room as the charger. Heck yeah. ;)
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| Aaron Cake |
Posted - Mar 31 2009 : 10:05:06 AM
High frequency and high voltage are the key as mentioned above. The system is horribly inefficient, dangerous, and will charge any metal object around it.
For really short range and safe transfer, induction works but again, efficiency is bad.
A focused microwave beam is good for long distances but again, is ridiculously inefficient and will cook things that walk through it.
It will be a long time, if ever, before any type of practical high-power wireless solution is available. Air is just simply too poor a conductor. |
| wasssup1990 |
Posted - Mar 30 2009 : 04:41:43 AM
So you want to transmit electricity through air. Well air is just another medium to transfer electrons. Like Copper, Aluminium or Iron. Air is not as dense as metal so you will need high voltage at your disposal. Ever seen lightning?
Create a "Tesla Coil" and you will be able to light up a Fluorescent tube and some Neon lights withought wires. Transmitting electricity through air has so far proven to be very inefficient but it is very interesting to see.
Good luck. |
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