A SEMINAR
ON WIRELESS POWER TRANSFER SYSTEM
Submitted to: Submitted By:MR. SUNIL GOYAL BALVEER SINGH HADAH.O.D. FINAL YEARELECTRICAL DEPARTMENT
INTRODUCTION
It is transmission of power without using wires
In this technique microwaves are used for transmission of electrical power.
Power at very high frequency is transmitted Efficiency is increased by increasing the
frequency
Persant Electric system
source
load
Loadsourc
e
WPT system
HISTORY In 1899 Nicola Tesla tranfered electrical
power through ‘Tesla coils’.Tesla coil a high mast of 200-ft with a 3 ft-diameter ball
at its top. He fed 300 kW power to the Tesla coil
resonated at 150 kHz. The RF potential at the top sphere reached 100 MV.
History contd..
MIT started a program “WiTricity” in which a project was made.
Energy was transferred upto 2m by helical shaped coils.
Efficiency of this transmission was 40%.
For small range For large rang
Inductive couplingResonant coupling
Through microwaves
Solar power satellite system
Various WPT techniques
Energy is transferred by mutual induction.
It’s range is very less. Example: Brush charging pad ,
transformer etc.
Inductive coupling
PROCESS OF INDUCTIVE COUPLING
RESONANT COUPLING
It is combination of resonance & inductive coupling.
. In resonant coupling range is few meters. In this coupling
circuit is tuned to mutual frequency.
TRANSMISSION THROUGH MICROWAVE
In 1970 microwaves were used for transmission of power.
The efficiency was 40-50%
It was done from space to ground by Japanes scientists in 1987.
Block Diagram
Microwave generator transmitter
receiverload
source
medium
Need of solar power satellite system
sun sun
Sun
sunsun
SOLAR PLATE
Solar power satellite system
Solar power satellites are used to get solar power more efficiently.
SPS are placed at geostationary orbits.
Solar power is captured by photocells &a satellite may have 400 million cells.
Energy is send to earth via microwaves/ LASER.
DIFFERENT VIEWS OF SPS
Rectenna in USRectenna in US receives 5000MW
of power from SPSIt is about one and half mile long
04/10/2023 Wireless Power Transmission 15
Environmental issues
It creates interference with the other communication system.
This interference can be removed by increasing frequency band.
It is not harmful for living entities.
ADVANTAGES
No transmission losses are persant in WPT system which are 30% approx.
Saving of wires & towers cost as no lines are required in this system
It is estimated that before 2030 all transmission in the world will be wireless
THANKS TO ALL
QUERY
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