ELECTRICITY WITH WITRICITY

Presented by :K.S.NIKHILESH

DEPARTMENT OF ELECTRICAL &

ELECTRONICS ENGINEERING.

SNIST

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 .

Block diagram for witricity mechanism

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

In the year 1891,NikolaTesla

proposed the method of

wireless transmission of

electric power.

One of the greatest

breakthroughs of science at that

time

TYPES OF WIRELESS ENERGY TRANSFER

TECHNIQUES ARE:-

Short range– Inductive coupling.

Mid range– Resonance Inductive

Coupling.

Long range-Microwave Transmission

& Laser Transmission.

Wireless electricity makes

use of the concept-

“Oscillating electric field

produces magnetic field

and oscillating magnetic

field produces electric

field”.

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.

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.

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.

Efficiency chart of witricity

It is observed that efficiency decreases with increase in distance between source coil and load coil

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.

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

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

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

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.

Wireless power transmission and reception using microwaves

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

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

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.