The Witricity Resource
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.
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
2 Responses to “About Witricity”