Witricity is a new company that has taken electricity and turned it into a cordless transmission. The electricity that the electromagnetic transmitters emit creates the ability to receive electricity short distances without the use of wires. The receivers are tuned into the same electrical frequency and pick up the electricity through the magnetic field created. So what does this mean, and why is it useful? Well, not only does it create a wireless environment... it can save you a lot of money.
The Way We Use Conventional Electricity
We plug our appliances into a wall and use the electricity through the cord. Well, this also leads to "electrical vampirism" and drains up to 20% more electricity than we actually use. This 20% is daily consumption and adds up quickly to a very substantial amount. Imagine reducing your electrical bill by 20% and you can start to see the potential savings. Witricity eliminates the "electrical vampirism" caused by cords. The system uses electromagnetic just like our Earth's magnetic field and the receivers convert the magnetic field back into electricity. The only disadvantage is that the magnetic field generator cannot be too far away. The design is actually relatively thin and could easily hide in the wall studding or behind pictures.
Witricity Hasn't Publically Released It's Product Yet as of 6/09
Their wireless electromagnetic technology product is set to release within a year. What a great invention and neat concept. We'll have to wait and see if the technology is economically efficient and what the initial return on investment will be.
Another useful look would be Witricity and the use of renewable energy. With the information age it's possible to create your own systems for a fraction of the price. Solar power and wind power generators coupled with the electromagnetic concept would make for extreme electrical savings. This would be a really great use for those who live off the grid. We'll have to wait and see. In the meantime there are great guides that can show you how to build your own wind generators and solar power systems. You can make your own systems that used to cost thousands for mere hundreds.
Building a Wind Generator for $200 - Finding a Motor
You want a permanent magnet motor that gives out high voltage at low rotational speeds. If your thinking about building your own permanent magnet generator, by all means do so... however you'll spend way more than $250 in costs. You can get small light motors that give out decent electricity for $100 or less. You really have two choices here, and it boils down to efficiency and what kind of energy demand your trying to supplement. You can buy one higher priced motor, or you can buy two lower priced motors.
You'll have to calculate what makes the most fiscal sense and how much your paying for your system. The idea behind buying two motors is building two wind generators opposed to one. So calculate what the output of two smaller motors would be compared to one larger more expensive motor. To keep things simple we'll say you buy an Ametek PM 50vdc motor, and it cost you $100 new. Often times people are upgrading their wind generator motors and you can pick up their used motors for relatively cheap.
That's just an example and their are much better motors available for that kind of price. A decent digital guide will give you information on where to get great motors for very low prices. Now you spent a total of $120, this leaves you $80. This $80 is easily going to buy materials for wiring, blades and the housing.
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