IN THIS PPT…

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.

WHAT IS WITRICITY?TRANSMISSION OF ENERGY THROUGH AIR IS

WITRICITY CABLES ARE GOING TO BE REPLACED BY WITRICITY

Types of wireless energy transfer techniques are:

• Short range-Inductive  Coupling • Mid range-Resonance  -Inductive

Coupling  • Long range –Microwave  Transmission

INDUCTIVE COUPLING • Uses

Electromagnetic Induction concept

• Primary and secondary coils are not connected with wires.

 • Energy transfer is due to Mutual Induction

.Oscillating electric field produces magnetic field and vice versa

RESONANT INDUCTIVE COUPLING

• USES ALMOST THE SAME CONCEPT OF INDUCTIVE COUPLING JUST THAT THE COILS OPERATE IN RESONANT FREQUENCY LEADING TO EFFICIENT ENERGY TRANSFER OVER A LARGE DISTANCE

WORKING • PROPERTY OF SYSTEMS TO

OPERATE AT HIGHER AMPLITUDES AT PARTICULAR FREQUENCIES KNOWN AS RESONANT FREQUENCIES THAN AT OTHERS

• WHEN TWO OBJECTS OPERATE AT SAME RESONANT FREQUENCY THEY TRANSFER ENERGY EFFICIENTLY BETWEEN THEM WITHOUT INTERFERING WITH THE OFF RESONANT OBJECTS

• • THE RESONANCE INDUCTION

WORKS EVEN WHEN THERE IS OBSTRUCTION PLACED IN BETWEEN THEM

Microwave Transmission• Aims at higher power transfer over longer distances

practically in the range of some miles

Requires a microwave source, antenna and rectenna.

Steps:

1.conversion of electrical to microwave energy

2.Capturing of microwave beams by Rectenna

3.conversion of microwave to electrical energy

Applications of long range transmission

• SOLAR POWER SATELLITES:

• WORKING 1) absorb light energy from

sun.

2) converted to electric energy and beamed to earth stations in form of microwave beams

3) so it can power satellites,aircrafts,even supply electricity to places where wired connections are not possible at lower prices.

APPLICATIONS 1)Rectenna in the US with

diameter of half a mile receives 95% of microwave power which is supplies 5000MW power as result

2) Charging electric car using witricity

3)Charging laptops and mobiles using POWERMAT

• Charging electric car using witricity