18/03/20151
HIT-K ECE-A
Presented by -
•SUSHOVAN SEN
•MARSHAL BASKE
•CHINMOY KARMAKAR
•ABRARUL HAQUE
•DEBARSI DAN
TABLE OF CONTENTS
• Introduction to Witricity
• Need for witricity
• History of wireless power
• Working principle of WPT
• Techniques to transfer
• Application Pros and cons
• Future trends and conclusion
INTRODUCTION TO WITRICITY
• Transmission of energy from one place to another without using wires.
History of Wireless Power
• In 1899, Sir Nikola Tesla
Proposed a method of
Wireless Power
Transmission.
• Tesla enlighten 200 lamps
at a distance of 40km .
The forgotten invention is reborn in
2007
In 2007,6 MIT
members headed by
Marin Soljacic were
able to successfully
transmit power to a
bulb within a
distance of 2m at a
freq of 9.9MHz .
Basic principle of Wireless power
transfer
• At source : Electricity => Magnetic wave
• At destination : Magnetic wave => Electricity
Experimental design
Working principle of wireless
power transfer
Mid range –
Resonance inductive
coupling
Short range –
Inductive
Coupling
Long range –
Electromagnetic
wave power
transfer
Techniques of wireless power
transfer
How does inductive coupling
works
• Inductive coupling works on the
principle of Electromagnetic
induction.
•Energy is non-radiative in nature.
•Power is transferred over a short
distance.
•Directivity is low
•Frequency range : Hz-MHz
Long range – Far field power
transfer
Energy is radiative in nature.
Power is transmitted by the
beam of Electromagnetic radiation.
Directivity is high.
Frequency range : >GHZ
WiTricity Applications
Applications(continuing)
• More Convenient
• More Reliable
• More Environmentally
Friendly
Advantages of witricity
Disadvantages
• Distance constraint
• Field strengths have to be under safety levels
• Initial cost is high
• In RIC, tuning is difficult
• High frequency signals must be the supply
Future of witricity
If we apply this idea to the whole city, we might not have to use any wired
cable. Moreover, in the future, it would save the material cost, and
“WE CAN SAVE THE WORLD, YEAH!!!”
Conclusion
Think that the city will be covered with WPT hot
spots, just like wireless internet , there will be no
need of charging batteries, or carrying adapters all
around !!!
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