4. WHAT IS WITRICITY?
๏ Transfer of electricity without using connections between
input and load is termed as wireless electricity.
๏ This is not like wireless transmission of signals which we
used in the cell phones.
๏ In cell phones signals are sent in the form of micro waves
whereas in this mode of transition electricity is transferred in
the form of magnetic rays.
๏These rays are not harmful to humans.
๏ The transfer of energy is mid range compared to direct
transmission.
5. NEED OF WITRICITY
๏ Now-a-days there is a rapid increase of electronic goods like cell
phones ,laptops ,I-pods etc., which rely on the chemical storage of
energy by the battery which need to be recharged frequently .As
these are becoming daily needs to the present generation wireless
energy transfer i.e, witricity would be useful for many applications as
these things need mid range energy.
6. WORKING PRINCIPLE OF WITRICITY
๏Witricity works on the principle of mutual induction between the two
coils.
๏There are two copper coils arranged one at the sender end and other at
the receiver end .The first coil is attached to the power source while the
second coil to the light bulb.
๏When the power is switched on the first coil converts the electricity into
magnetic field ,which is oscillating at a particular frequency i.e, AC source.
๏The second coil at the receiver end converts the magnetic field into
electricity .The surrounding environment is unaffected.
9. MECHANISM OF WITRICITY
There are two methods of witricity :
1.Radiative
2.Non-Radiative
* Resonance coupling
* Inductive coupling
10. RESONANCE COUPLING
Here, the resonator in the receiver consists of the receiver inductance and a capacitor.
Also the transmitter can have a resonator. The general arrangement is illustrated .
The diagram shows clearly, that the resonant capacitors cancel out the stray inductance in the receiver and the
magnetizing inductance in the transmitter. Therefore, for a given generator source, much more power can be
received.
12. โขIn this two conductors are said to be inductively coupled or magnetically
coupled when they are configured in a way such that change in current
through one wire induces a voltage across the ends of the other wire
through electromagnetic induction.
.An inductively coupled transponder consists of a solid
state transceiver chip connected to a large coil that functions as
an antenna. When brought within the oscillating magnetic field of a
reader unit, the transceiver is powered up by energy inductively coupled
into its antenna and transfers data back to the reader unit inductively.
Magnetic coupling between two magnets can also be used to
mechanically transfer power without contact, as in the magnetic gear.
13. ADVANTAGES
๏ An advantage is that we can produce electricity anywhere without wires
๏ The power can be delivered in any direction i.e, omnidirectional
๏ Most common things in our surroundings do not interact with these
magnetic fields and thus not harmful to other living beings
๏ Significant decluttering of office space
๏ No need for meter rooms and electrical closets.
๏ Reduction of e-waste by eliminating the need for power cords
๏ Need more light in your office, no need for electrician. Simply place the
lamp where ever you need it.
14. ๏The flux condition should satisfy certain conditions,if not no power
supply takes place.
๏There is a lose of power transmission if there is a strong ferro-magnetic
substance.
๏ Need for standardization and adaptation. So no overheating occurs
because of different voltages.
๏ Retrofitting old equipment or purchasing new equipment could
become a very expensive endeavor.
๏ Possibility of โenergy theftโ. Wi Fi, someone can be using your internet
or your power.
LIMITATIONS
15. SAFETY
๏ Any living organisms that are placed in between the two
coils(transmitter &emitter) will not halt or hinder the transmission of
magnetic field.
๏ It is because the magnetic rays will not interact with the living tissues so
strong and can be easily passed through the humans or other living
organisms.
16. CONCLUSION
๏The transmission of power without wires is not theory or a mere
possibility, it is now a reality. The electrical energy can be economically
transmitted without wires to any terrestrial distance
๏ It has a tremendous economic impact to human society
