presentation on witricity
DESCRIPTION
Transmission of electricity without using wires is called WITRICITY.TRANSCRIPT
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ELECTRICITY WITH WITRICITY
Presented by :K.S.NIKHILESH
DEPARTMENT OF ELECTRICAL &
ELECTRONICS ENGINEERING.
SNIST
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Definition is : “Transmission of
energy through air.”
Cables are going to replaced by Witricity. The transmission of electrical energy without wires to any place on the earth .
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Block diagram for witricity mechanism
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Why do we need wireless electricity???
The need of electricity in every nook and corner of the world
The demand of eco-friendly power
Requirement of efficient and reliable power
To reduce dependence on wires and batteries
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In the year 1891,NikolaTesla
proposed the method of
wireless transmission of
electric power.
One of the greatest
breakthroughs of science at that
time
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TYPES OF WIRELESS ENERGY TRANSFER
TECHNIQUES ARE:-
Short range– Inductive coupling.
Mid range– Resonance Inductive
Coupling.
Long range-Microwave Transmission
& Laser Transmission.
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Wireless electricity makes
use of the concept-
“Oscillating electric field
produces magnetic field
and oscillating magnetic
field produces electric
field”.
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Resonant Inductive Coupling
Uses almost the same
concept as Inductive
coupling just that the
coils operate at resonant
frequency leading to
efficient transfer of
energy over a larger
distance.
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D i f f e r e n t F r e q u e n c y
Resonance
Property of systems to operate at higher amplitudes at purticular frequencies known as resonant frequencies than at others.
When 2 objects operate at same resonant frequency they
transfer energy efficiently between them without interfering
with the off resonant objects.
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D i f f e r e n t F r e q u e n c y
The glass which was having the resonant frequency as of the singer’s voice accumulated sufficient energy to explode eventually.
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Efficiency chart of witricity
It is observed that efficiency decreases with increase in distance between source coil and load coil
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Applications of Witricity(short range and mid range)
1.DIRECT WIRELESS POWER
No device would need wires
For TVs, toasters or any form of
immobile electronic devices.
2. AUTOMATIC WIRELESS
CHARGING
Device with rechargeable batteries
charges itself.
For any form of mobile devices .
3.INDUSTRIAL
would be free of heavy installation of
wires and devoid of any hazardous
electric shock incidents.
4.TRANSPORTATION
Could charge an electric car or
automobile.
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Types of Long range/Far field transmission techniques
Microwave Transmissionextracts small quantities of
energy in the range 902 and 928 MHzDisadvantage—interference caused by metal surfaces.
Laser TransmissionHighly directional and coherentInefficient for wireless power
transmission
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MicrowaveTransmission
Aims at higher power transfer over longer distances practically in the range of some miles
Requires a microwave source, antenna and rectenna.operates in the frequency range of 1-40GHzoperates at the highest efficiency at 2.45GHzSteps:
1.conversion of electrical to microwave Energy.
2.Capturing of microwave beams by Recttena.
3.conversion of microwave to electrical Energy
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SOLAR POWER SATELLITES:The most imp. Application or advancement:absorb light energy from sun.
converted to electric energy and beamed to earth stations in form of microwave beams
so it can power satellites,aircrafts,even supply electricity to places where wired connections are not possible at lower prices.
SPACE POWER TRANSMISSION AND LUNAR BASED PROJECTS:Satellites in space can receive microwave signals from earth and beam it to any place on earth.In future it encourages power projects on the moon.
Applications of long range transmission
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Image of a Rectenna in US with diameter of about half a mile which is important as 95% of the microwave power is received by rectennas.US receives about 5000MW of power as a result.
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Wireless power transmission and reception using microwaves
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Unlimited energy resource
Energy delivered anywhere in the world
Zero fuel cost
Zero CO2 emission
Minimum long-range environmental impact
Solar radiation can be more efficiently collected in space
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Launch costs .
Capital cost even given cheap launchers .
Would require a network of hundreds of satellites .
The size of the antennas and rectennas.
Geosynchronous satellites would take up large sections of space.
Interference with communication satellites
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Prospects & Issues:
Conclusion:
Wireless electricity is not just a great idea but an urgent measure that has to be taken to deal with the current energy crisis.Even the smallest entity can lead to one of the most mindboggling dilemmas of the world. Electrons the source of electricity puts us in a similar fix. It is on us to decide how to tap these electrons to be useful in our lives.Wireless electricity comes with its baggage but no can deny that it is here to stay.
From the discussion its clear that this idea needs awareness to remove doubts from minds of the people about safety issues.It requires both support from government and the people financially and psychologically.
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