WITRICITY- WIRELESS ELECTRICITY
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#1
04-10-2010, 09:42 AM


ABSTRACT

Don't you hate it when you forget to put your mobile phone on charge? Well, take heart - a new technology called WiTricity could mean never having to plug it in again. Welcome to the world of WiTricity. WiTricity, a portmanteau for wireless electricity, is a term which describes wireless energy transfer, the ability to provide electrical energy to remote objects without wires. The term was coined initially in 2005 by Dave Gerding and later used for the project and implimentation of a MIT research team led by Prof. Marin Solijaci.
The wireless electricity works on the principle of using coupled resonant objects for the transfer of electricity to objects without the use of any wires. This concept of witricity was made possible using resonance where an object vibrates with the application of a certain frequency of energy. The MIT researchers have been able to power a 60 watt light bulb from a power source that is located about seven feet away. This was made possible using two copper coils that were twenty inches in diameter which were designed so that they resonated together in the MHz range. One of these coils were connected to a power source while the other, to a bulb. With this witricity setup, the bulb got powered even when the coils were not in sight.
The main advantages of witricity are that it is omni directional; the mess of wires can also be avoided .Thus enabling us in easy recharging of our electronic gadgets likes mobiles and laptops. Also, interactions of the environmental objects with the magnetic fields are suppressed since there is no tendency of interaction with the common materials. Its discovery is different from all previous effort because it uses “magnetically coupled resonance", which means it will not only be safe but it will be fairly efficient.
This technology is a big impediment to development in the retail sector right now. The wireless transfer of electricity has been a sci-fi dream up to this point, and truly, if electricity could simply be in the air, in the same way radio waves and wi-fi signals are, it would change the world.


INTRODUCTION

WiTricity, a portmanteau for wireless electricity, is a term which describes wireless energy transfer, the ability to provide electrical energy to remote objects without wires. The term was coined initially in 2005 by Dave Gerding and later used for the project and implimentation of a MIT research team led by Prof. Marin Soljačić in 2007
Wireless power transmission is not a new idea, but to do so in an efficient way typically requires a directed beam like a laser or microwave. William C. Brown demonstrated in 1964 on the CBS Walter Cronkite news a microwave-powered model helicopter that received all the power needed for flight from a microwave beam (which requires the beam to be aimed at the aircraft as it flies). Between 1969 and 1975 Bill Brown was technical director of a JPL Raytheon program that beamed 30 kW over a distance of 1 mile between stationary points at 84% efficiency. Methods that don't require directed beams are typically very inefficient, as the energy is radiated in all directions (like a radio antenna) and only a small amount reaches the desired destination.


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.doc   Witricity (2).doc (Size: 460.5 KB / Downloads: 1,080)
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Geethashree
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#2
27-02-2011, 03:13 PM

I NEED THE PDF AND PPT OF THIS PLZ SEND IT SOON
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Manvitha
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#3
05-03-2011, 08:32 PM

Can i get the ppts 4 this as aoon as possible Undecided pleaaseee!! Confused
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rangusai450
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24-03-2011, 11:18 AM

i want info about witricity regarding my mini project and implimentation. plz help me
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taithelles
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07-04-2011, 06:58 PM

Method does not require direct beam is usually very inefficient because the energy radiated in all directions such as radio antennas and only a small amount of the desired destination.
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neelansh
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17-04-2011, 10:22 AM

cool report but i req more matter about it
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20-01-2012, 10:31 AM



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01-02-2012, 10:58 AM

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16-03-2012, 11:52 AM

WiTricity - Wireless Electricity



.pdf   WiTricity.pdf (Size: 161.83 KB / Downloads: 37)

What is WiTricity?
WiTricity is nothing but wireless electricity. Transmission of electrical
energy from one object to another without the use of wires is called
as WiTricity. WiTricity will ensure that the cellphones, laptops, iPods
and other power hungry devices get charged on their own, eliminating
the need of plugging them in. Even better, because of WiTricity some
of the devices won't require batteries to operate.



What's the Principle behind WiTricity?
WiTricity - Wireless Electricity, these words are simpler said than
done. The concept behind this fascinating term is a little complex.
However, if you want to understand it, try and picture what I state in
the next few lines. Consider two self resonating copper coils of same
resonating frequency with a diameter 20 inches each. One copper
wire is connected to the power source (WiTricity transmitter), while
the other copper wire is connected to the device (WiTricity Receiver).


The Brain behind WiTricity?
Prof. Marin Soljacic from Massachusetts Institute of Technology
(MIT), is the one who has proved that magnetic coupled resonance
can be utilized in order to transfer energy without wires. What's even
more interesting is how he came about this idea. Soljacic, just like
any of us was fed up of his 'low battery' beeping cellphone and wondered just like any of us if there was a way to get rid of this
'charging problem'. However, here is where the difference between
Soljacic and any of us comes in. He didn't just stand there wondering,
instead he tried to figure out if there existed any physical
phenomenon which could be of some help. He remembered Michael
Faraday's discovery of electromagnetic induction (1831) and used it
to come up with WiTricity.



MIT's Experiment:
In 2007, Marin Soljacic led a five member team of researchers at MIT
(funded by Army Research Office, National Science Foundation and
the Department of Energy) and experimentally demonstrated transfer
of electricity without the use of wires. These researchers were able to
light a 60W bulb from a source placed seven feet away, with
absolutely no physical contact between the bulb and the power
source.

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16-04-2012, 11:15 AM


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30-04-2012, 03:16 PM

CAN I GET THE PPT AND REPORT FOR THIS. I WANT TO HAVE A MINIMUM OF 35 SLIDES AND FUTURE SCOPE OF THIS WORK
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#12
10-05-2012, 04:24 PM

WITRICITY-



.doc   witricity.doc (Size: 1.19 MB / Downloads: 30)

INTRODUCTION:
The seed which was sown in early 1900’s by Nicola Tesla started germinating in 2007 and is ready to spread its roots deep into the technological world. From the past days the transmission of messages has been developed in a significant process from letters to telephone, telephone to mobile, mobile to mails through internet. And these are facilitated by the electronic appliances such as mobiles, computers, laptops etc., like the evolutionary development creating revolution in the field of communication, scientists and technologists started a search which will soon turn our planet into an adobe of electricity. This search was stopped at Witricity (wireless +electricity).




Need for new technology:
• In our present electricity generating system we waste more than half of its resources. Especially the transmission and distribution losses are the main concern present in this present power technology. Much of this power is wasted during transmission from power plant generators to the consumer.
• The resistance of the wire used in the electrical grid distribution system causes a loss of 26-30% of the energy generated. This loss implies that our present system of electrical distribution is only 70-74% efficient. We have to think of alternate state - of - art technology to transmit and distribute the electricity.



Historical facts:
• 1894: Jagdish Chandra Bose ignited gunpowder and rang a bell at a distance using electromagnetic waves, showing that communication signals can be sent without using wires
• 1897: Nikola Tesla (inventor of radio[3], microwaves and Alternating current) filed his first patents dealing with Wardenclyffe tower.
• 1900: Guglielmo Marconi failed to get a patent for Radio. The patent office mentioned "Marconi's pretended ignorance of the nature of a "Tesla oscillator" being little short of absurd...".
• 2008: Intel shows how to send power wirelessly to power a light bulb at 75%
Not only these, many attempts are made to transmit electricity without wires .Whatever may be the results that they got, whole earth is now in a dire need of power and eager to have this technology.

Foundation stone for Witricity:

The most well-known and famous Wardenclyffe Tower (Tesla Tower) was designed and constructed mainly for wireless transmission of electrical power,
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30-07-2012, 09:41 AM

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#14
11-08-2012, 12:32 PM

Wireless Electricity


.ppt   Wireless Electricity.ppt (Size: 592.5 KB / Downloads: 31)

The first mover and innovator

Born in Austro-Hungary (now Croatia) in 1856, Tesla constructed his first induction motor in 1883 and immigrated to America in 1884 - arriving in New York with worldly goods totaling four cents, a pocket full of poems, carefully worked calculations for a flying machine, and a head full of strange dreams.
Tesla began working with Thomas Edison, but the two men were worlds apart in both their science and cultures (the fact that Tesla's alternating-current concept posed a direct threat to sales of Edison's direct-current devices probably didn't help) and they soon went their separate ways.
Tesla invented the alternating-current generator that provides your light and electricity, the transformer through which it is sent, and even the high voltage coil of your picture tube. The Tesla Coil, in fact, is used in radios, television sets, and a wide range of other electronic equipment - invented in 1891, no-one's ever come up with anything better.
Letting Tesla go wasn't the brightest thing Edison had ever done, though - George Westinghouse promptly snapped up the patent rights to Tesla's alternating-current motors, dynamos, and transformers. The buy-out triggered a power struggle which eventually saw Edison's direct-current systems relegated to second place, and the DC motors installed in German and Irish trains only a few years before, rendered obsolete.

The forgotten invention is reborn in 2007

The idea of wireless electricity has been around since the early days of the Tesla coil. But thanks to a group of MIT scientists, "WiTricity" (as these scientists call it) is now one step closer to practical reality.
Demonstrating the ability to power a 60-watt light bulb from a power source seven feet away without wires might not seem like the most impressive of feats, but the technology behind it has massive implications for how we live our tech-filled, power-hungry lives. Imagine a day when your laptop, MP3 or player are constantly charged by power sent through the air via an electromagnetic field.

Incremental or Disruptive

We believe wireless electricity incremental because it was innovated at the end of the 1800’s and only last year it was improved to a new technology.
We can also say that it may become disruptive because if a strong enough product is developed it will wipe out the demand for chargers. Therefore charging will become universal.
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05-03-2013, 01:00 PM

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