ppt by shubham singh kalhans on witricityPresentation Transcript
A Power point presentation
TOPICS TO BE DISCUSSED
2. BASIC PRINCIPLE
6. DEVELOPMENT OF WITRICITY
10.THE FUTURE ASPECTS
4. EXPERIMENTAL SETUP
WITRICITY is the transfer
of electricity from one place
to another without
WITRICITY is a
Combination of words for
Transmission of Electricity.
Allows power to cross
distances even when there is
no physical connection
between the power source
and the object to be
WHAT IS WITRICITY???
PRINCIPLE OF WIRELESS
TRASMISSION OF ELECTRICITY
Two resonant objects of the same resonant frequency
tend to exchange energy efficiently, while interacting
weakly with extraneous off-resonant objects
MAGNETICALLY COUPLED RESONATORS
The system involves two electromagnetic resonators
coupled through their magnetic fields.
This enabled efficient power transfer, even when the
distance between them was several times larger than the
sizes of the resonant objects.
How Wireless Electricity Works
The oscillating current inside the transmitting coil causes the
coil to emit a magnetic field.
A circuit A attached to the power supply supplies power to the
transmitting coil B.
The setup requires two identical coils with one coil connected
to a load,like a bulb.
The receiving coil C has the exact same dimensions as the
sending coil B and thus resonates at the same frequency and due
to a process called magnetic induction voltage is induced in coil
Thus,coil C picks up the energy of the coil B’s magnetic
The energy of the oscillating magnetic field induces an
electrical current in the receiving coil, lighting the bulb D.
Simulate a transfer of 60W across two identical loops similar in
The coils had a radius of 30 cm,with a cross section of 3cm
and distance between the coils was 200m.
Transmission of electricity is occurring inspite of the
obstruction in between.
An alternate view of the previous picture.
We determine the efficiency of transfer of energy takingWe determine the efficiency of transfer of energy taking
place between the source coil and the load by measuring theplace between the source coil and the load by measuring the
current at the midpoint of the each coils with a currentcurrent at the midpoint of the each coils with a current
EFFICIENCY OF WITRICITY
Is WITRICITY an entirely new
Wireless power transmission is not a new
Dr.Nikola Tesla demonstrated a
"transmission of electrical energy without
wires" that depends upon electrical
conductivity as early as 1891.
The Tesla effect (named in honor of Tesla) is the term for
an application of the wireless movement of energy through
space and matter, not just the production of voltage across
Dr. Nikola Tesla shows us that he is indeed the “Father of
Starting in 1901, Tesla made
Wardenclyffe Tower Project for
wirelessly sending industrial
amounts of energy on large-scale.
“ Ere many generations pass, our
machinery will be driven by a power
obtainable at any point of the universe
He showed how power can be transferred through free space
INVENTOR OF WITRICITY
The experiment involving the discovery of WITRICITY
was led by MIT physics professor Marin Soljacic and
was reported on the June 7,2007.
From left to right: Soljacic, Karalis, and Joannopoulos,
with a figure from their paper in the background.
Say good bye to
ADVANTAGES OF WITRICITY
NO POWER CORDS
The electrical energy can be transmitted without wires, so
there will be no need of power cords.
LOW POWER LOSS
Due to absence of conventional wiring system,transmission
losses are very low.
PROVIDES EARTH FREE SUPPLY
Reduces chances of electric shock.
No need for external wiring so no need for electrician.
No meter rooms and electrical closets required.
NO TRANSFORMER NEEDED
It eliminates the need of Step Down Transformers.
LIMITATIONS OF WITRICITY
Retrofitting old equipment or purchasing new equipment
could become a very expensive endeavor.
Possibility of energy theft.
This technique can transmit electricity for short
Employed in cases where instantaneous and continuous
transfer of power is needed.
SCOPE OF WITRICITY
To overcome situations where normal cabling is difficult
or financially impractical
WITHIN NEXT 10 YEARS
Short distance induction
After 50 Years – Moderate distance Induction
After 100 Years – Long distance