Wireless Power Transmission
Wireless Power Transmission
Wireless Power Transmission
Presented by
Zaka Ullah UW-11-EE-BSc-06
Ali Faraz Qayyum UW-11-EE-BSc-46
OVERVIEW
INTRODUCTION
DEFINITION
HISTORY
TYPES OF WPT
Atmospheric conduction method
Electrodynamic induction method
INTRODUCTION
DEFINITION
As the word wireless means without wire.
Wireless energy transfer or wireless power is the
transmission of electrical energy from a power source to an
electric load without interconnecting man made
conductors.
HISTORY
Sir NICOLAI TESLA was the first one to propose and research the idea of
wireless transmission in 1899, since than many scholars and scientists
have been working to make his dream a reality.
1899: Tesla continues wireless power transmission research in
Colorado Springs and writes, "the inferiority of the induction
method would appear immense as compared with
thedisturbed charge of ground and air method
1961: William C. Brown publishes an article exploring
possibilities of microwave power transmission
2009: Sony shows a wireless electrodynamics-induction powered TV
set, 60 W over 50 cm
METHODS
Different methods of transmission proposed by
different scientist and scholars are:
1. Atmospheric conduction method of Tesla
2. Electrodynamic induction method:
Microwave method
Laser method
In
ATMOSPHERIC CONDUCTION
METHOD
1899 Sir NICOLAI TESLA and HEINRICH HERTZ
is
made
using
transmitter,
ionized
path
ATMOSPHERIC
CONDUCTION METHOD
High potential is maintained at transmitter and
receiver end as well. A high potential transmitter
transmits an electromotive impulse through the
ionized path to the upper atmosphere where it ionizes
the air, and this air between the transmitter and
receiver would conduct like a neon tube .
LIMITATIONS OF ATMOSPHERIC
CONDUCTION METHOD
Economically challenging.
Periodic changes in atmospheric condition.
ELECTRODYNAMIC INDUCTION
METHOD
We bring electromagnetic radiation into
practice, which uses far field technique in order
to achieve range into kilos, which includes two
techniques:
LASERS
MICROWAVE
LASER
LASER is highly directional, coherent
TRANSMISSION
Not dispersed for very long
Cost-efficient
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LASER
METHOD
In the case of electromagnetic radiation closer to visible
region of spectrum (10s of microns (um) to 10s of nm),
power can be transmitted by converting electricity into
a laser beam that is then pointed at a solar cell receiver.
This mechanism is generally known as "power beaming"
because the power is beamed at a receiver that can convert
it to usable electrical energy.
OPTICAL FIBRE
TRANSFORMER
LASER
CURRENT
CURRENT
MICROWAVE
Power transmission via radio waves can be made more
directional,
allowing longer distance power beaming, with
METHOD
APPLICATIONS
Near-field energy transfer
Electric automobile charging
Static and moving
Consumer electronics
Industrial purposes
Harsh environment
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ADVANTAGES
Efficient
Easy
Need for grids, substations etc are eliminated
Low maintenance cost
More effective when the transmitting and
receiving points are along a line-of-sight
Can reach the places which are remote
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DISADVANTAGES
When microwaves are used, interference may
arise
When LASERS are used, conversion is inefficient
due to absorption losses.
It is radioactive in nature
Distance constraint , initial cost is high.
Field strength has to be under safety levels
High frequency signals should be supplied for
air ionization which is not feasible.
CONCLUSION
Transmission without wires- a reality
Efficient
Low maintenance cost. But, high initial cost
Better than conventional wired transfer
Energy crisis can be decreased
Low loss
In near future, world will be completely
wireless
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REFERENCES
S. Sheik Mohammed, K. Ramasamy, T. Shanmuganantham, Wireless
power transmission a next generation power transmission system,
International Journal of Computer Applications (0975 8887) (Volume 1
No. 13)
Peter Vaessen, Wireless Power Transmission, Leonardo Energy,
September 2009
C.C. Leung, T.P. Chan, K.C. Lit, K.W. Tam and Lee Yi Chow, Wireless
Power Transmission and Charging Pad
David Schneider, Electrons unplugged, IEEE Spectrum, May 2010
Shahrzad Jalali Mazlouman, Alireza Mahanfar, Bozena Kaminska, Midrange Wireless Energy Transfer Using Inductive Resonance for Wireless
Sensors
Chunbo Zhu, Kai Liu, Chunlai Yu, Rui Ma, Hexiao Cheng, Simulation and
Experimental Analysis on Wireless Energy Transfer Based on Magnetic
Resonances, IEEE Vehicle Power and Propulsion Conference (VPPC),
September 3-5, 2008
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