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 !!!