What is Wireless power
History of WPT.
Types of WPT.
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.
Simply the transmission of energy from one place
to another without using wires.
In late 1980s Nikola Tesla worked on Induction
He was able to transfer energy from one coil to
He managed to light 200 lamps from a distance of
The idea of Tesla was taken into research after
100 years by the project named “ WITRICITY”.
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.
Primary and secondary coils are not connected
Energy is transferred due to mutual induction.
Examples are wireless charging pad, transformer
Air ionizes at high field.
Needed field is 2.11MV/m.
Natural example is lightening.
Not feasible for practical implementation.
Microwave Power Transmission
Transfers high power from one place to another.
o Electrical energy to microwave energy.
o Capturing microwaves using antenna.
o Microwave to electrical energy.
Elimination of high power transmission
Reduction in cost because of not using
It increases the portability of electrical
devices as it removes wires.
Reduction in power losses.
Interference with existing
To much expensive for bigger scale
Microwaves hazardous to human life.