2. 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.
3. 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.
http://www.authorstream.com/Presentation/vkey99-479237-
wireless-electricity-new/
http://www.scribd.com/doc/86893146/Wireless-Electricity-
PPT-Sai-Rajesh
4. 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.
http://www.authorstream.com/Presentation/vkey99-
479237-wireless-electricity-new/
http://www.scribd.com/doc/86893146/Wireless-Electricity-
PPT-Sai-Rajeshhttp:
5. Projecting magnetic field
Magnetic vector notation
dB=udH
Induced EMF due to change in flux
___ ___ http://www.authorstream.com/P
resentation/vkey99-479237-
wireless-electricity-new/
6. 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.
http://www.authorstream.com/Presentation/vkey99-479237-wireless-
electricity-new/
http://www.scribd.com/doc/86893146/Wireless-Electricity-PPT-Sai-
Rajeshhttp:
7. 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 “energy theft”. Wi Fi, someone can be using your
internet or your power.
Limitations
http://www.authorstream.com/Presentation/vkey99-479237-wireless-
electricity-new/
http://www.scribd.com/doc/86893146/Wireless-Electricity-PPT-Sai-
Rajeshhttp:
8. 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.
http://en.wikipedia.org/wiki/Wireless_power
http://www.google.co.in/imgres?q=wireless+electricity
&hl=en&sa=X&tbo=d&biw=1295&bih=680&tbm=isch&t
bnid=47ZOlzdeDJSX6M:&imgrefurl
