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Wireless Power Transmission(Future is Here)


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It is not a day dream that power transmission is done Wirelessly.Various technologies in this field are discussed.

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Wireless Power Transmission(Future is Here)

  1. 1. Wireless Power Transmission Presented By Soumya Prateek Muni 1001104052 Department Of Electrical Engineering Government College Of Engineering , Keonjhar
  2. 2. What is wireless power transmission(WPT)? Why is WPT? History of WPT Types of WPT Techniques to transfer energy wirelessly Advantages and disadvantages Applications Conclusion References Overview
  3. 3. What is WPT? The transmission of energy from one place to another without using wires Conventional energy transfer is using wires But, the wireless transmission is made possible by using various technologies
  4. 4. As per studies, most electrical energy transfer is through wires. Most of the energy loss is during transmission • On an average, more than 30% • In India, it exceeds 40% Why Not Wires?
  5. 5. Reliable Efficient Fast Low maintenance cost Can be used for short-range or long- range. Why WPT?
  6. 6. Nikola Tesla in late 1890s His vision for “World Wireless System” The 187 feet tall tower to broadcast energy All people can have access to free energy Shortage of fund lead to nonoperation He used to lamp 200 lights from 40 km distance History
  7. 7. Near-field techniques Inductive Coupling Resonant Inductive Coupling Air Ionization Far-field techniques Microwave Power Transmission (MPT) LASER power transmission Types and Technologies of WPT
  8. 8. The transfer of energy Magnetic coupling Inductive coupling Simplest Wireless Energy coupling is a transformer Energy Coupling
  9. 9. Primary and secondary coils are not connected with wires. Energy transfer is due to Mutual Induction Wireless Charging Pad(WCP) ,Electric Brushes are some examples. Inductive coupling
  10. 10. The capacitor and inductor forms the resonator. Charge oscillates between inductor (as magnetic field) and capacitor (as electric field.) This type of oscillation is called resonance if the reactance's of the inductor and capacitor are equal. Resonance Inductive Coupling(RIC)
  11. 11. Coil provides the inductance Capacitor is connected parallel to the coil Energy will be shifting back and forth between magnetic field surrounding the coil and electricfield around the capacitor. Radiation loss will be negligible How resonance in RIC?
  12. 12. An example
  13. 13. Toughest technique under near-field energy transfer techniques Air ionizes only when there is a high field Needed field is 2.11MV/m Natural example: Lightening Not feasible for practical implementation Air Ionization
  14. 14. Advantages: No wire, No e-waste Need for battery eliminated Efficient & Harmless Disadvantages: Distance constraint Field should be under safety level High initial cost Tuning is difficult in RIC Advantages & Disadvantages of near-field techniques
  15. 15. Transfers high power from one place to another. Two places being in line of sight usually Steps: Electrical energy to microwave energy Capturing microwaves using rectenna Microwave energy to electrical energy AC is converted to DC first DC is converted to microwaves using magnetron Microwave Power Transfer(MPT)
  16. 16. Transmitted waves are received at rectenna which rectifies, gives DC as the output DC is converted back to AC Rectenna: Stands for rectifying antenna Consists of mesh of dipoles and diodes Converts microwave to its DC equivalent Usually multi-element phased array MPT(Continued….)
  17. 17. LASER is highly directional, coherent Not dispersed for very long But, gets attenuated when it propagates through atmosphere Simple receiver Photovoltaic cell Cost-efficient LASER transmission
  18. 18. To provide energy to earth’s increasing energy need To efficiently make use of renewable energy i.e., solar energy SPS are placed in geostationary orbits Each SPS may have 400 million photocells Efficiency exceeds 95% if microwave is used. Solar Power Satellites (SPS)
  19. 19. Advantages & Disadvantages of Far Field Technology Advantages: Efficient , Easy Need for grid eliminated Low maintenance cost More effective when the transmitting and receiving points are along a line-of-sight Can reach the places which are remote Disadvantages: Radiate When LASERs are used, conversion is inefficient Absorption loss is high When microwaves are used, interference may arise
  20. 20. Qi(Chee) is a interface standard Developed by Wireless Power Consortium It works for a distance up to 40mm(1.6inches) Comprises a transmission pad & a compatible receiver The Qi Standard
  21. 21. Near-field energy transfer Electric automobile charging Static and moving Consumer electronics Industrial purposes Harsh environment Applications
  22. 22. Far-field energy transfer Solar Power Satellites Energy to remote areas Can broadcast energy globally (in future) Applications(Continued…..)
  23. 23. Based on RIC , Led by MIT’s Marin Soljačić Energy transfer wirelessly for a distance just more than 2m. Coils were in helical shape No capacitor was used Efficiency achieved was around 40% Used frequencies are 1MHz &10MHz Intel is working on it Wireless Electricity(WiTricity)
  24. 24. Transmission without wires- a reality Efficient Low maintenance cost. But, high initial cost Better than conventional wired transfer Energy crisis can be decreased Low loss In near future, world will be completely wireless Conclusion
  25. 25. “Wireless Power Transmission”, Vol No.-45, Electronics For U –August-2013 Peter Vaessen,” Wireless Power Transmission”, Leonardo Energy, September 2009 C.C. Leung, T.P. Chan, K.C. Lit, K.W. Tam and Lee Yi Chow, “Wireless Power Transmission and Charging Pad” References
  26. 26. White Paper on Solar Power Satellite (SPS) Systems, URSI, September 2006 Richard M. Dickinson, and Jerry Grey, “Lasers for Wireless Power Transmission” David Schneider, “Electrons unplugged”, IEEE Spectrum, May 2010 References(Continued……)
  27. 27. THANK YOU!