2. OBJECTIVES:-
What is Wireless power
Transmission?
History of WPT.
Types of WPT.
Advantages.
Disadvantages.
3. WHAT IS WPT ?
Wireless power or wireless energy
transmission is the transmission of electrical
energy from a Power source to an electrical load
without man-made conductors.
(OR)
Simply the transmission of energy from one place
to another without using wires.
4. HISTORY
In late 1980s Nikola Tesla worked on Induction
techniques.
He was able to transfer energy from one coil to
another coil.
He managed to light 200 lamps from a distance of
40 km.
The idea of Tesla was taken into research after
100 years by the project named “ WITRICITY”.
5. TYPES OF WPT
WPT can be used in 2 ways.
For nearer purpose:
o Inductive coupling .
o Resonant Inductive coupling.
o Air ionization.
For farther purpose:
o Microwave power transmission.
o Laser power transmission.
6. INDUCTIVE COUPLING
Primary and secondary coils are not connected
with wires.
Energy is transferred due to mutual induction.
Examples are wireless charging pad, transformer
etc.
7. AIR IONIZATION
Air ionizes at high field.
Needed field is 2.11MV/m.
Natural example is lightening.
Not feasible for practical implementation.
8. Microwave Power Transmission
Transfers high power from one place to another.
Steps:
o Electrical energy to microwave energy.
o Capturing microwaves using antenna.
o Microwave to electrical energy.
9. ADVANTAGES
Elimination of high power transmission
lines.
Reduction in cost because of not using
expensive wires.
It increases the portability of electrical
devices as it removes wires.
Reduction in power losses.
10. DISADVANTAGES
Interference with existing
communication systems.
To much expensive for bigger scale
implementation.
Microwaves hazardous to human life.
