Post on 13-Jan-2017
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