wireless electricity transfer

8/12/2019 Wireless Electricity Transfer

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WIRELESS ELECTRICITY

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In this paper

1) What do you mean by Witricity ?

2) Need of Witricity.3) History of wireless power.4) Techniques to Transfer

5) Application , Pros and cons.

6) Future and conclusion.www.freepptpresentation.com


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What is Witricity ?

Obvious definition is :Transmission of energy through the air

Cables are going to replaced by WiTricity



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Why do we need wirelesselectricity???

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

The ever increasing power demand



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Wireless electricity wayback in the 1800s..

In the year 1891,Nikola Teslaproposed the method ofwireless transmission of electric

power

One of the greatest breakthroughsof science at that time



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Built the wardenclyffe towerwhich could broadcast powerwirelessly using far-field

techniques. Called off as itradiated power intosurroundings raising issues ofpower loss Power theft Health concerns

The Wardenclyffe Tower

A dream crashes www.freepptpresentation.com


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Types of wireless energy transfer

techniques are:-

Short range-InductiveCoupling

Mid range-ResonanceInductive Coupling

Long range MicrowaveTransmission



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INDUCTIVE COUPLING

Uses Electromagnetic Induction concept Primary and secondary coils are not connectedwith wires. Energy transfer is due to Mutual Induction This method works only when receiver is inclose proximity to the transmitter



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Inductive coupling

Uses Electromagnetic Induction concept

Oscillating electric field produces magnetic field andoscillating magnetic field produces electric field.



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Different Frequency

Resonance

Property of systems to operate at higher amplitudes at particularfrequencies known as resonant frequencies than at others.

When 2 objects operate at same resonant frequency they transfer energyefficiently between them without interfering with the off resonant objects.



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Different Frequency

The glass which was having the resonant frequencyas of the singers voice accumulated sufficientenergy to explode eventually



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Different Frequency

The glass which was having the resonant frequencyas of the singers voice accumulated sufficientenergy to explode eventually

The setup powered the bulb even when coilswere not in line of sight .The bulb glowed evenwhen wood, metal and other devices wereplaced in between the coils



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Microwave Transmission

Aims at higher power transfer over longer distancespractically in the range of some milesRequires a microwave source, antenna and rectenna. Steps :

1.conversion of electrical to microwave energy2.Capturing of microwave beams by Rectenna3.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 ofmicrowave beamsso it can power satellites,aircrafts,even supply electricity to placeswhere wired connections are not possible at lower prices.

Applications of long range transmission



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Image of a Rectenna in US with diameter of about half a milewhich is important as 95% of the microwave power is receivedby rectennas.US receives about 5000MW of power as a result.



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Applications

Demo 1:Charging Electric Car usingWitricity .



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Demo 2:

Charging the mobiles and laptops usingPOWERMAT



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Advantages:

Disadvantages:

1. Efficient and reliable power.

2. Creation of a shock free environment devoid of any chancesof power thefts.3. Provides solution to the ever increasing demand for power.4. A solution to reduce e-waste- a more safe environment.5. A more cost effective methodology for getting electricity toyour houses which includes paying less for use of power.

1.For short and mid range transfer system has to be set at theright frequency or there would be no power transfer.2.For long range the installation cost is high while themicrowaves will cause harmful effects to the human.



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Future and Conclusion

Transmission without wires- a reality Energy crisis can be decreased In near future, world will be completely wireless



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wireless electricity transfer

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