05-12-2012, 11:45 AM
Wireless Electricity
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Introduction
This presentation takes you through what Wireless Electricity is all about and its working principle.
Here we have provided a brief history of Wireless Electricity, its current research, application and future of it.
History of Wireless Power
In 1899, Sir Nikola Tesla proposed Wireless Power Transmission
In radiative mode most power is wasted and has less efficiency
The efficient midrange power transfer concept is Witricity.
In this model source and load are in magnetic resonance hence no power loss.
Witricity
Electricity without wires
Magnetic Loop antennas
Electromagnetic near - field
Need of Witricity
Rapid development of electronic devices like Laptops cellphones and autonomous house-hold robots relying of chemical energy storage
Wireless energy transfer would be useful in such cases as they need midrange energy.
Basic Principle
Near field inductive coupling through magnetic fields
Interact weakly with surrounding objects (biological tissue).
Two objects having same resonating frequency and in magnetic resonance at strongly coupled regime tend to exchange energy while dissipating relatively little energy to extraneous off-resonant objects.
Nikola Tesla
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 totalling 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