Wireless Power Transfer

Wireless Electricity Transfer

1. WIRELESS POWER TRANSFER 18/03/2015 1 HIT-K ECE-A

2. Presented by - SUSHOVAN SEN MARSHAL BASKE CHINMOY KARMAKAR ABRARUL HAQUE DEBARSI DAN

3. 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

4. INTRODUCTION TO WITRICITY Transmission of energy from one place to another without using wires.

5. 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 .

6. 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 .

7. Basic principle of Wireless power transfer At source : Electricity => Magnetic wave At destination : Magnetic wave => Electricity

8. Experimental design

9. Working principle of wireless power transfer

10. Mid range – Resonance inductive coupling Short range – Inductive Coupling Long range – Electromagnetic wave power transfer Techniques of wireless power transfer

11. 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

12. 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

13. WiTricity Applications

14. Applications(continuing)

15. More Convenient More Reliable More Environmentally Friendly Advantages of witricity

16. 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

17. 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!!!”

18. 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 !!!