24-01-2011, 03:42 PM
wireless electricity ].ppt (Size: 1.75 MB / Downloads: 379)
Rocio Aguilera,Jenine Bluett,Jon Alcala,Lawrence Cushion,Monica Borowiak,
Jacalyn Kastigar,Heather Madsen,Justin Kuryliw,Jeremy Peterson, John Morse,Kristina Polidoro,Joseph Nowacki,Crystal Snow & Fadima Sidibe
What Is Wireless Electricity?
Produce power without the use of wires or cords – just like a power outlet
Place your electronic device that you want to charge in a specific room or on a surface to charge it wirelessly
WiTricity - short for wireless electricity
Key: Resonance
Ex. Glass shatters from sound that hits a certain pitch
Resonant frequencies must match (sound glass makes to pitch of sound hitting the glass)
When resonant frequencies match, glass will absorb sound and crack
Magnetic Induction (from Answers.com)
The production of an electromotive force through:
Motion of a conductor through a magnetic field so as to cut across the magnetic flux
By a change in the magnetic flux that threads a conductor
Magnetic induction + 2 identical copper cords that resonate at the same frequency = MIT (Massachusetts Institute of Technology) Scientists making WiTricity
Powered 60-watt light bulb from power source 7ft away
A Little History
Faraday: Discovers electromagnetic induction builds first power generator in 1831.
Marconi, Tesla: Send first wireless messages in 1895.
Tesla: experiments with wireless power 1899
Motorola: introduces handheld mobile phone in 1973.
Sonicare: Introduced the first charge electric toothbrush in 1983.
PowerCast: Reintroduce wireless power in transmitter and in receiver technology in 2003
PROs
Less accidents and instances of electrocution
Convenient to consumers who use products that can be charged through WiTricity
Could eliminate the need for an inefficient, costly, and capital intensive grid of cables, towers and substations
Gateway to other breakthrough technological advances
Eliminate mess of cords and power strips used to charge products
Your home would keep your gadgets constantly powered up
Could eliminate batteries
Magnetic fields have little affect on biological organisms – but still needs more testing
CONs
Products we use on the go would still need batteries
Could be like Wi-Fi: free in some places and fees in others
Electrical pollution
Associated with illnesses such as, cardiac problems, learning disabilities, mood disorders, and fatigue
Electromagnetic radiation
Associated with childhood and adult leukemia, breast cancer, clinical depression, and miscarriage
Uncertain affect on medical equipment, such as heart regulators
Another way for confidential personal information to be abused
Objects could absorb radiation unintentionally
Efficiency varies by distance (40-90%)
How Is This Technology Being Used?
PowerCast
Introduced wireless holiday lights at the end of 2007
Leader in the industry
Signed nondisclosure agreements to develop products with more than 100 companies
Companies include manufacturers of:
Cell phones, MP3 players, automotive parts, temperature sensors, hearing aids and medical implants
WildCharge: a Colorado-based company
Released a special back plate for the Motorola RAZR
Enables the phone's battery to receive power from a charged mat
Plans to introduce similar adapters for the iPod Nano and Blackberry
Bosch and eCoupled
Created a vehicle with wireless energy flowing throughout
It can:
Recharge power tools placed on a charging shelf
Recognize and recharge cell phones and PDAs placed in holding bins
Fulton Innovation: US company
Working with Visteon, a car parts manufacturer
Possible product that will recharge a phone when it’s placed into a vehicle's cup holder
Probably won’t be widely seen until 2009 – at the earliest
Many experiments still needed
Health effects?
Privacy
Finalization of invention
US Department of Defense is funding research
Hopes soldiers will be able to recharge batteries automatically
MIT is talking with companies interested in commercializing the technology
Has attracted the attention of consumer-electronics companies and the auto industry
Overall hopes to wirelessly recharge electronic products in any area through this new technology
Health-related products
Consumer electronics
Bibliography
http://www.popsciscitech/article/2008-01...ricity-air
http://www.answerstopic/electromagnetic-induction
http://www.katunews/tech/27313134.html
http://www.CNNMoney.com
http://www.coolbusinessideas.com
http://www.dailymail.co.uk/sciencetech/a...-home.html