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Friday, 18 February 2011
TED Talks: Eric Giler demos wireless electricity
Applications of resonant energy transfer to supply electricity wirelessly.
So, high frequency alternating magnetic field induces a current in the nearby coil if the latter is set up correctly...I assume the energy transferred is proportional to the magnetic flux through the secondary coil. Seems to me that how small you are able make the receiving coil is limited by how much inefficiency you're willing to tolerate. So, I can see this could work for large objects, but I wonder how much extra power he had to draw to charge the cell phone- the power cord he used definitely looked a bit hefty.
So, high frequency alternating magnetic field induces a current in the nearby coil if the latter is set up correctly...I assume the energy transferred is proportional to the magnetic flux through the secondary coil. Seems to me that how small you are able make the receiving coil is limited by how much inefficiency you're willing to tolerate. So, I can see this could work for large objects, but I wonder how much extra power he had to draw to charge the cell phone- the power cord he used definitely looked a bit hefty.
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