Discussion in 'Hardware' started by TIKITRADER, Mar 26, 2011.

  1. Wireless electricity.

    It has been around a few years now (actually very long but recently revisited ) and I would like know if anyone come across this anywhere including Tech expos, etc... and even had an opportunity to see it work.
    This is perfect for laptop work where eliminating dependency on batteries would not limit the working hours and add to freedom. The uses are endless.


    Article highlighting work at MIT ( 2007 ) ...

    Imagine a future in which wireless power transfer is feasible: cell phones, household robots, mp3 players, laptop computers and other portable electronics capable of charging themselves without ever being plugged in, freeing us from that final, ubiquitous power wire. Some of these devices might not even need their bulky batteries to operate.

    A team from MIT's Department of Physics, Department of Electrical Engineering and Computer Science, and Institute for Soldier Nanotechnologies (ISN) has experimentally demonstrated an important step toward accomplishing this vision of the future.

    The team members are Andre Kurs, Aristeidis Karalis, Robert Moffatt, Prof. Peter Fisher, and Prof. John Joannopoulos (Francis Wright Davis Chair and director of ISN), led by Prof. Marin Soljacic.

    Realizing their recent theoretical prediction, they were able to light a 60W light bulb from a power source seven feet (more than two meters) away; there was no physical connection between the source and the appliance. The MIT team refers to its concept as "WiTricity" (as in wireless electricity). The work will be reported in the June 7 issue of Science Express, the advance online publication of the journal Science.

    Entire article here


    More recent article here MIT 2010



    witricity video with some humor

    <iframe title="YouTube video player" width="640" height="390" src="http://www.youtube.com/embed/ZXt4Ot5I6SM" frameborder="0" allowfullscreen></iframe>

    Witricity the company site

  2. This direction in electric is an exciting advance.
    I wonder what future impact it would have on electricians , union and self employed trades , and what, if any position the union would take regarding this technology reducing much of residential electric even some commercial work.
  3. Yea but 45% efficiency? I don't think we should be moving towards a technology that is inherently inefficient, do you?

    I would rather spend my electrical research and development budget on things like superconducting power transmission. This is going the right direction in efficiency - zero resistance, near perfect efficiency.


  4. You are referring to this technology ? Reading up on it now thanks

  5. Do we need to worry about electro-magnetic waves frying your brain?

  6. That's what the 1970's was for :D

    If your brain survived that everything else is easy cruising.

    In all seriousness the technology is something that would be beneficial. I wil continue to gather more info.
  7. ammo


    i don't think they found a way to meter it and collect a profit
  8. Tesla ran into the metering issue killing his projects.
  9. I most strongly agree, with the need to reevaluate the inefficiency of power generation and transmission. I cut this sentence from the article linked below.

    "The efficiency of generation varies widely with the technology used. In a traditional coal plant, for example, only about 30-35% of the energy in the coal ends up as electricity on the other end of the generator."


  10. Would the metering really be an issue ? If a home draws a certain load in a day for all devices used would it meter as the usage of all devices ?

    Good points brought up about loss. On a residential level , at the point of the electric meter to the wireless devices, is a loss of electric seen. Would the devices draw an increase of electric at the meter just to be able to operate normal due to wireless loss?
    #10     Mar 27, 2011