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witricity the wireless electricity

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  1. 1. Revolution in the field of electRicity
  2. 2.  What do you mean by Wi Tricity ?  Need of witricity  History of wireless power  Witricity Basics  Working Principle  Is Wi Tricity safe ?  Application of WiTricity ?  Advantages  Limitations  References Contents
  3. 3. What is WitriCity? Witricity is nothing but wireless electricity. Transmission of electrical energy from one object to another without the use of wires is called Witricity. Because of Witricity some of the devices won’t require batteries to operate .
  4. 4. Why we need Witricity?. WE USE WIRES…
  5. 5. And we use...
  6. 6. Which sometimes ends as…
  7. 7. History of Wireless Power:  In 1899, Sir Nikola Tesla Proposed a method of Wireless Power Transmission.  As it is in Radiative mode, most of the Power was wasted and has less efficiency.  Able to light lamps over 25 miles away without using wires The team from Massachusetts Institute of Technology, who call their invention ‘WiTricity‘. In the first successful trial of its kind, the team was able to illuminate a 60-watt light bulb 7ft away.
  9. 9. •Electricity is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. •Magnetism is a force that acts at a distance due to a magnetic field. This field is caused by moving electrically charged particles or is inherent in magnetic objects such as magnet.
  10. 10. •Electromagnetic induction is the production of voltage across a conductor moving through a magnetic field. •Electromagnetism is one of the four fundamental interactions of nature, along with strong interaction, weak interaction and gravitation. It is the force that causes the interaction between electrically charged particles; the areas in which this happens are called electromagnetic fields •Energy/Power Coupling: Energy coupling occurs when an energy source has a means of transferring energy to another object
  11. 11. •Resonance :is the tendency of a system to oscillate with larger amplitude at some frequencies than at others. These are known as the system's resonant frequencies (or resonance frequencies). At these frequencies, even small periodic driving forces can produce large amplitude oscillations •Resonant Magnetic Coupling: Magnetic coupling occurs when two objects exchange energy through their varying or oscillating magnetic fields. Resonant coupling occurs when the natural frequencies of the two objects are approximately the same.
  12. 12. 4) Electricity picked up by laptop's antenna, which must also be resonating at 10MHz. Energy used to re-charge device. 5)Energy not transferred to laptop re-absorbed by source antenna. People/other objects not affected as not resonating at 10MHz. 12 How WitriCity works ? 1) Power from mains to antenna, which is made of copper 2) Antenna resonates at a frequency of 10MHz, emitting electromagnetic waves 3) 'Tails' of energy from antenna 'tunnel' up to 2.5m (8.2ft)
  13. 13. WiTricity’s technology is a non- radiative mode of energy transfer, relying instead on the magnetic near field. Magnetic fields interact very weakly with biological organisms—people and animals— and are scientifically regarded to be safe. WiTricity products are being designed to comply with applicable safety standards and regulations.
  14. 14. 14 Automatic wireless charging of mobile electronics (phones, laptops, game controllers, etc.)in home, car, office. Direct wireless power and communication interconnections at points of use in harsh environments(drilling, mining, underwater, etc.) Automatic wireless charging for existing electric vehicle classes: golf carts, industrial vehicles. Witricity Applications :-
  15. 15. No need of line of sight. No need of power cables and batteries. Does not interfere with radio waves. Wastage of power is small . Negative health implications. Highly efficient than electromagnetic induction Less costly. ADVANTAGES
  16. 16. Limitations :- Wireless power transmission can be possible only in few metres. Efficiency is only about 40%
  17. 17. REFERENCES :-  www.wikipedia.com  www.google.in  An article published in the Science Magazine as “Wireless Electricity” by Andre kurs. THANKING YOU ALL