Wireless Electricity

Wireless Electricity - What this new system would mean for us and how it works
Australia
June 11, 2007 8:33am CST
Has anybody heard of this one before? I was looking around a site and this caught my eye. I think if it was to come into the world it would be quite helpful. After this just imagine how easy it would be to work equipment without wires everywhere. The end of the plug? Scientists invent wireless device that beams electricity through your home. Scientists have sounded the death knell for the plug and power lead. n a breakthrough that sounds like something out Star Trek, they have discovered away of 'beaming' power across a room into a light bulb, mobile phone or laptop computer without wires or cables. In the first successful trial of its kind, the team was able to illuminate a 60-watt lightbulb 7ft away. The team from Massachusetts Institute of Technology, who call their invention 'WiTricity', believe it could change the way we use electricity and do away with the tangle of cables, plugs and chargers that clutter modern homes. It could also allow the use of laptops and mobile phones without batteries. The inspiration came when the lead researcher, Dr Marin Soljacic, was standing in his kitchen at night staring at his mobile phone."It was probably the sixth time that month that I was awakened by my cell phone beeping let me know that I had forgotten to charge it. It occurred to me that it would be sogreat if the thing took care of its own charging,"he said. To turn this dream into reality, Dr Soljacic needed a way of transmitting power wirelessly. Scientists have known for nearly two centuries that it is possible to transfer an electrical current from one coil of wire to another without them touching. The phenomenon, called electromagnetic induction,is used in power transformers and electric motors around the world. However, the coils in motors and transformers have to be close for power to pass from one to another. Attempting to transfer power over distances is impossible. The breakthrough came when Dr Soljacic realisedthere was another way of transferring energy through the air. Rather than sending power from a transmitter to a receiver as a conventional electromagnetic wave - the same form of radiationas light, radio waves andmicrowaves - he could use the transmitter to fill a room with a 'non-radiative'electromagnetic field. Most objects in the room - such as people, desks and carpets - would be unaffectedby the electromagnetic field. But any objects designed to resonate with the electromagnetic field would absorb the energy. It sounds complicated, but the result demonstratedy the American team this monthwas a dramatic success. Using two coils of copper, the team transmitted power 7ftrough the air to a light bulb, which lit up instantly. The scientists say the technique works only over distances of up to 9ft. However, theybelieve it could be used to charge up a battery within a few yards of the power source connected to a receiving coil. Placing one source in each room could provide enough power for an entire house. The receiver and transmitter would not have to be in view of each other. Professor Peter Fisher, another of the researchers, said: "As long as the laptop is in aroom equipped with a source of wireless power,it would charge automatically without having to be plugged in. In fact, it would not even need a battery to operate inside such a room."The researchers believe there is little to worry about on safety grounds, saying thatm agnetic fields interact weakly with living organisms and are unlikely to have any serious side effects. Dr Soljacic said: "When my son was about three years old, we visited his grandparents' house. They had a 20-year-old phone and my son picked up the handset asking, 'Dad, why is this phone attached with a cord to the wall?'That is the mindset of a child growing up in a wireless world."Hopefully we will be getting rid of some more wires and batteries soon."I found this story on: http://www.dailymail.co.uk/pages/live/articles/technology/technology.html?in_article_id=460602&in_page_id=1965
1 person likes this
4 responses
• Philippines
11 Jun 07
i've heard of these things in the past. now they are realeasing the Wireless induction of electricity. wherein you will just put your gadget on an induction enabled surfacce and itll charge itself. pretty cool huh. well anyway that's the thing i know for this topic. keep posting!
• Australia
11 Jun 07
That would pretty cool. Im guessing that was on a smaller scale though? This one is about providing a whole house not just a particular surface in it. Still Pretty interesting to know they are releasing it.
@raredog (743)
• Philippines
11 Jun 07
Nice post! Very interesting. This is the first time I've ever read this long on mylot. My opinion is that this technology is the future of the world. They would definitely upgraded it to become much more powerful. I know someday vehicles will no longer have tires because of this electromagnetic thing.
• Australia
11 Jun 07
I didnt think about what it could mean for vehicles and stuff like that, I saw that it would be very useful for electrical applicances. There would be no need for "portable" appliances anymore. They all would be :P Wow, lol longest post you've read? sorry about some of the words stuck together and such. It had spacing between paragraphs in it too when i wrote it but they seemed to dissapear unfortunately :(
@jade1986 (567)
• India
11 Jun 07
Exciting stuff you reported man... This really is exciting. I understand the entire process that they are trying to adopt, but i believe this electromagnetic field they are trying to generate would be expensive and short ranged. The resonating receiver also needs to be very fine tuned and that is also difficult to achieve. But since the invention has been made, things will progress, and we can hope to achieve success on materializing the project within the next few years, after all impossible is nothing. Thanx a lot for the information...Keep posting such exciting stuffs if you find.
• Australia
11 Jun 07
Yeah, i have heard that Tesla invented the idea way back when but the Electrical companies vetoed the idea because they wouldnt know how to charge them for it. It would be annoying if this was a reason they wouldnt go forward with it though, pure industry greed.
• Canada
11 Jun 07
I have never heard of this before but this would be really interesting if we didn't have to worry about batteries or plugs or where we were going to put our t.v or whatever in the house because we didn't have to worry about where the plug was or having to find an extention cord so something would fit where we wanted it . Maybe something like this would also be able to reduce that amount we spend for our power and would save money on all the batteries we buy each day to run what we want .