Wireless Transmission Of Electricity

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Wireless Transmission Of Electricity

  1. 1. WIRELESS TRANSMISSION OF ELECTRICITY PRESENTED BY : SUNIL KUMAR 0602110
  2. 3. INTRODUCTION <ul><li>In our present electricity generation system we waste more than half of its resource . Especially the transmission and distribution losses are the main concern of the present power technology . </li></ul><ul><li>The transmission &distribution system causes a loss of 26to 30 % of the energy generated </li></ul><ul><li>The transmission of power without wires may be one noble alternative for electricity transmission . </li></ul>
  3. 4. WHAT IS WI-TRICITY ? <ul><li>Wireless transmission of electricity is a process where electrical energy is transmitted from a power source to an electrical load without interconnected wires . </li></ul><ul><li>Electromagnetic radiation is excellent for wireless transmission of information , it is not feasible to use this for power transmission ,as majority of power would end up being wasted into free space . </li></ul>
  4. 5. THE TECHNOLOGY AVAILABLE <ul><li>Inductive coupling – very short distance transmission. </li></ul><ul><li>Evanescent wave coupling – moderate distance transmission . </li></ul><ul><li>Microwave power transmission theory (MPT) – long distance transmission . </li></ul>
  5. 6. INDUCTION COUPLING <ul><li>Here transfer of energy take place by electromagnetic coupling through a process called mutual induction . Eg: In transformer. </li></ul><ul><li>This method works only when receiver is in close proximity to the transmitter </li></ul>
  6. 7. APPLICATIONS <ul><li>Wi-power technology . </li></ul><ul><li>Electric toothbrush. </li></ul><ul><li>Electromagnetic card reader. </li></ul>
  7. 8. EVANESCENT WAVE COUPLING <ul><li>EWC function on the concept that if you make two resonant objects of same resonant frequency tend to exchange energy efficiently , while interacting weakly with extraneous off- resonant objects. </li></ul><ul><li>Transmission range for this method is nearly 5 to 10 meters . </li></ul>
  8. 9. EWC TRANSMISSION
  9. 11. MICROWAVE TRANSMISSION THEORY <ul><li>MPT called solar power satellite to be build in high earth orbit to collect sunlight and convert that energy into microwaves , then beamed to a very large antenna on earth , the microwaves would be converted into conventional electrical power with the help of rectenna . </li></ul>
  10. 12. MICROWAVE WIRELESS TANSFER
  11. 13. EFFICIENCY COMPARISON ? <ul><li>Efficiency as high as 97 to 98% have been achieved by MPT . </li></ul><ul><li>Efficiency of about 57 to 60 % have been achieved by EWC transmission . </li></ul>
  12. 14. MERITS <ul><li>ECW </li></ul><ul><li>Reduction in e- wastes as cords are not required . </li></ul><ul><li>One could add another lightening source without hiring a electrician </li></ul><ul><li>Removal of power lines in the buildings. </li></ul><ul><li>Resonant object do not require a line of sight . </li></ul><ul><li>MPT </li></ul><ul><li>High transmission integrity and low losses . </li></ul><ul><li>It will eliminate the need of grid of cables , towers and substations </li></ul><ul><li>This will help in reduction of cost of electrical energy used by consumer . </li></ul><ul><li>Micro wave is less prone to atmosphere attenuation as compared to lasers. </li></ul>
  13. 15. DEMERITS <ul><li>EWC </li></ul><ul><li>Retrofitting old equipment or purchasing new equipment could become a very expensive endeavor . </li></ul><ul><li>Increase possibility of “energy theft “ </li></ul><ul><li>MPT </li></ul><ul><li>large transmitter and receiver to deal with diffraction over long distances . </li></ul><ul><li>With focused beam of microwave radiation there are definite health and safety risk. </li></ul>
  14. 16. CONCLUSION <ul><li>The Transmission of electricity without wires is not a theory or a mere possibility , it is now a reality . The electrical energy can be economically transmitted without wires to any terrestrial distance . </li></ul><ul><li>The future is near in which wireless power transfer is feasible :cell phones , household robot , mp3 player , laptop , capable of charging themselves without ever being plugged in, freeing us from that final, ubiquitous power wire . </li></ul>
  15. 17. THANKS

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