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According to Dave Schatz, the head of business development at WiTricity, the Intel project is one of a handful that have a long way to go before they result in products. "A number of companies have stated that they're doing similar [wireless power] as a research activity, but there are no products," he says. If these companies do make products, Schatz suspects that there could be intellectual property issues. Soljacic and his team applied for patents in 2007 before the technology was announced, and since then, the company, founded in April of that year, has been working hard to develop products. Schatz believes that others will find it difficult to catch up. "Not only do they have a lot of technology to develop, but there will also be IP issues to consider," he says.
In January, WiTricity demonstrated the first generation of "embedded solutions," in which wireless coils were built into devices like laptop computers and flat-screen televisions. "The coils are compact and designed into products with sources that are small and flat," Schatz says. And just last week, he demonstrated a prototype charger that can wirelessly charge an electric-car battery, transferring up to three kilowatts.
There are still a number of engineering challenges, says Schatz, including finding the best way to shrink the coils, which are made of copper, so that they can be integrated easily into devices of various shapes and sizes. But he suspects that his company's products will be on the market within the next 18 months.
Nokia hopes to create a device that could harvest enough power to keep a cell phone topped up.
"Specifically, both groups are using magnetic fields for sharing energy because such fields have little known impact on the environment and on people's health, compared with electrical fields."
According to maxwell theory magnetic field produces electric field so where is the catch? Where this 20% of energy goes?
we can have giant expensive coils that produce extraneous radiation that may make you sterile, and lose half the electricity,
all to replace 10 cents worth of copper wire to span six feet.
I can't think of other ways to get my electric bill past the consumer baseline so they double my rates.
That's PROGRESS!!!!
I agree it is a bad invention.
The principle is so simple that it is almost impossible to improve its efficiency.
I note that 7 Mh waves (lambda = 42.8 m.)use a 30 cm. receiving antenna for 80% conversion efficiency, (i.e. lambda/antenna diam. = 143).
I assume the rectifying circuit is simple. I assume that the efficiency remains nearly invariant as the size of the coils (and the wavelength) vary proportionately together. So try antenna diam = 100 microns on a chip of size say 200 by 100 by 50 microns for use as a chemistry chip in solution (as previously described by others); then the wavelength = 1.43 cm, i.e. microwave. The antenna in the photo appears planar; assume this is so. Then we have a power source for a chemistry chip. As previously described, the informational output of such a chip can be broadcast on a separate frequency to be picked up by the original broadcasting antenna on a slightly different frequency for each individual chip. This allows a multiplexed array of chemistry analysis chips to work in a single test tube of biological sample (as previously described by others).
Are these assumptions correct? I think this should work.
the size of coil can be shrunk a lot
There are still a number of engineering challenges, says Schatz, including finding the best way to shrink the coils, which are made of copper, so that they can be integrated easily into devices of various shapes and sizes.
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If the coils is make of metal-type carbon nanotube with the diameter of about 1um, the size of coil can be shrunk a lot.
Why the coil (CoilOne) powers the speaker is so big?
It is because the coil needs big space to collect sufficient energy from 3D space to power the speaker. The larger coil (which produces magnetic field around 3D space) emits much bigger power into space and the CoilOne only can receive some part of the power.
The principle is simple and it seems the design never will be able to turn into a practical product. More metal wires to make the CoilOne has little effect to improve its efficiency.
hi,
i am student of telecom engineering and i want to take wireless power as my final year project as i am keeen interested in this topic, i want your help to guide me and help me about this technology.
thank you,
Manufacturing in the United States is in trouble. That's bad news not just for the country's economy but for the future of innovation.
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Urbanstatue
5 Comments
effecient?
My only issue with this is previous reports of wireless power were at about 50% efficacy (or something like that, if memory serves). Why spend billions in technology to save power/resources/environment just to lose it on a wireless charge. How many articles have we read that were ecstatic at only a 5-6% increase in solar cell efficiency, for instance...
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StupidPeasant
98 Comments
Re: effecient?
We want each item to be more efficient with the energy we got, but then we want to do more stuff with that extra (saved) energy. Our goal should be to change where and how we get the energy, not to worry about how much we use. I want to have clean abundant energy; more than enough, so that it is cheep.
Jobs, pollution, disasters, hunger, wars and many other earthly issues can be solved with a saturation of energy.
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StupidPeasant
98 Comments
Re: effecient?
I hate plugging stuff in. I would pay money for it. A job is born.
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