Monday, October 20, 2008
wireless power
Lets say you had a late night. Lets say you forgot to charge your PDA, and your entire presentation was on it. Imagine if your PDA, cell phone or your laptop could know when your battery is low and it would just charge itself. If that was real it would save your day, and perhaps, save your job. It sounds a little far fetched, but from a new technology known as "inductive coupling" we could see a world without wires. Marlin Soljacic creator, got the idea when his cell phone woke him up, he was annoyed because the phone continuously beeped because the battery was low. He began to think of ways that could transfer power wirelessly.
This technology can be compared to wi-fi, all you do is plug this transmitter into your wall and it will be able to charge your battery in your cell phone with out plugging it in the wall. By using magnetic fields these "base stations" your plug in emit energy that can charge your battery or even power your television.
This his Sljacic' explanation of his wireless energy system.
"The base station would fill a space with low frequency electromagnetic field in the range of a few megahertz. A gadget would be equipped with a receiver, like the power- harvesting circuits used in RFID (radio frequency identification) to collect ambient energy. Soljacic's circuit would be designed to resonate at the same frequency as the radiation emitted by the power station. When the device came within a couple of meters of the station, circuitry would absorb the energy, charging the device's battery."
There are lots of possibilities with inductive coupling, this could have a huge impact on people's lives. Will this be too expensive for the average people? Will it solve the nation's energy crisis?Is this going to be affordable, or just another toy for billionaires? Many questions emerge from this topic and only time can answer them.
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Rich man's toy or wave of the future? Practical solution or luxury? Wireless is sexy but is it necessary?
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