About Witricity

This entry was posted on Saturday, June 9th, 2007 at 2:10 pm and is filed under Articles. You can follow any responses to this entry through the RSS 2.0 feed.

About Witricity

Posted on June 2007 in Articles

March 2010 - It’s been nearly 3 years since Witricity was first PR’ed. Wonder what the first commercially available Witric device will be.. Hmmm. My money’s on a battery charger. 


October 2008 - MIT receive $4 Million Series A funding, set up an office and start hiring to develop WiTricity into a real-world application. Read more…


Witricity (pronounced “why” not “we”) is a term coined by MIT to describe a new (see my history article if that’s contentious) method of transmitting electricity without wires using magnetically coupled resonance. Although the concept has been played with for some time by the MIT team, the findings from the first tests were reported via the journal Science Express in June 2007 describing the test as successful in transmitting power from a witric resonator to a 60w lightbulb at a distance of 7 feet - just over 2 metres. The team reckon 9ft is the limit of it’s reach, for now at least, but note that it can travel through obstructions.

MIT Team & Witricity

Above: The MIT team and the witricity test apparatus

Efficiency was deemed to be 40% at this early stage but is expected to improve dramatically as the technology is fine-tuned. And as you can see from the picture above, there is some way to go before you’re going to be able to fit a witric mobile phone in your pocket! But with technology, refinements and improvements in efficiency and size are never far behind in this day and age.

The beauty of Witricity is that it should be among the safest energy sources we know (despite a few skeptics already proclaiming magnetic fields can cause cancer - erm) as magnetic fields interact very little with living organisms. The method requires a conducting resonator and a receiving device resonating at the same frequency (ie 10Mhz) - think two copper coils. Because resonance is the key, no energy is lost during the transmit process as the conductor device retains any surplus energy.

Typically, witric devices of the future might be laptops, mobile phones and other similar products which require charging or electric current to operate. How long will it take? Well, MIT reckon it could be commercially viable in 3-5 years, but who knows - the next likley step in the process is for MIT to sell the witricity technology on to a company for further development, so it will depend when, and who.

A full write up on the witricity project, tests and conjecture as to potential witric devices of the future can be found in the MIT Press Release.

UPD: 9th September 2007: Google Witricity Search Statistics Updated

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2 Responses to “About Witricity”

  1. nathaniel taylor Says:

    There is nothing new here, the coils look almost identical to Telsa’s orginal wireless power patent. In fact all antennas magnetically couple with the original transmitter antenna, this has been known for years! Even to Tesla! And as to the organisms not being affected that is insane! Maybe organisms with zero iron content, but hemoglobin is definitly affected as well are as many other componds.

    10mhz is relatively large wavelength but I’d imagine there are quite a few other objects that will resonate, large trees light poles, etc really the best use of this technology, which I tried to suggest to woods hole researcher a long time ago at the Next festival in San Francisco California is to power submersibles during operation so that there is zero electrical conductance.

    So go ahead and sell the idea, make your millions, just don’t put one in my nieghborhood, and don’t claim that it’s an original idea. I am sure there are a few generations of experimenters rolling in their graves at this thought alone. OH and let me guess the light bulb lights from the AC of the coil/resonant antenna and if I wanted DC power I’d shove a germainum diode on there, oh wait thats a crystal radio, I thought I was being original…. -radiorobot

  2. nathaniel taylor Says:

    Ok did that sound insane enough? What is original and I would like to point out for all you Tesla freaks is that the wave here is… I am assuming, mostly or all magnetic… which is interesting… and basically well again not that original (think large transformer) except for maybe the distance that they are trying to traverse… but wasn’t there recently a company, or two, designing a chips to place into products that did a similar if not the same thing? I can say one thing however I CAN feel magnetic effects when I place my hand into a extension cord pile while running a saw so as to EMF not effecting us I still don’t believe it.
    -radiorobot (again)