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Wireless power transmission1

  1. 1. Wireless Power Transmission<br />Presented by<br />Shubham Jain <br />0809010094<br />Department of Computer Science Engineering<br />IEC College of Engineering and Technology, Gr.Noida<br />
  2. 2. Overview<br />What is wireless power transmission(WPT)?<br />Why is WPT?<br />1940’s to Present<br />Microwave transmission<br />Rectenna<br />Applications <br />Space-based solar power<br /> SPS 2000<br />Advantages<br />Conclusion<br />References <br />4/20/2011<br />Wireless Power Transmission<br />2<br />
  3. 3. What is WPT?<br />The transmission of energy from one place to another without using wires<br />Conventional energy transfer is using wires<br />As per studies, most electrical energy transfer is through wires. <br />Most of the energy loss is during transmission<br /><ul><li>On an average, more than 30%
  4. 4. In India, it exceeds 40%</li></ul>4/20/2011<br />Wireless Power Transmission<br />3<br />
  5. 5. Why WPT?<br />Reliable<br />Efficient<br />Fast<br />Low maintenance cost<br />Can be used for short-range or long-range.<br />4/20/2011<br />Wireless Power Transmission<br />4<br />
  6. 6. 1940’s to Present<br />World War II developed ability to convert energy to microwaves using a magnetron, no method for converting microwaves back to electricity<br />1964 William C. Brown demonstrated a rectenna which could convert microwave power to electricity<br />
  7. 7. Microwave transmission<br />Microwave transmission refers to the technology of transmitting information by the use of radio waves whose wavelengths are conveniently measured in small numbers of centimeters; these are called microwaves.<br />This part of the radio spectrum ranges across frequencies of roughly 1.0 gigahertz (GHz) to 30 GHz.<br />These correspond to wavelengths from 30 centimeters down to 1.0 cm.<br />
  8. 8. Microwave Power Transfer(MPT) Cont.<br />Transfers high power from one place to another. Two places being in line of sight usually<br />Steps:<br />Electrical energy to microwave energy<br />Capturing microwaves using rectenna<br />Microwave energy to electrical energy<br />4/20/2011<br />Wireless Power Transmission<br />7<br />
  9. 9. MP T (cont.…)<br />AC can not be directly converted to microwave energy<br />AC is converted to DC first<br />DC is converted to microwaves using magnetron<br />Transmitted waves are received at rectenna which rectifies, gives DC as the output<br />DC is converted back to AC<br />4/20/2011<br />Wireless Power Transmission<br />8<br />
  10. 10. Rectenna<br />“An antenna comprising a mesh of dipoles and diodes for absorbing microwave energy from a transmitter and converting it into electric power.”<br />Microwaves are received with about 85% efficiency.<br />Around 5km across (3.1 miles)<br />95% of the beam will fall on the rectenna.<br />
  11. 11. 5,000 MW Receiving Station (Rectenna). This station is about a mile and a half long in US.<br />
  12. 12. Applications<br />
  13. 13. Space-based solar power<br />1968’s idea for Solar Power Satellites proposed by Peter Glaser<br />Would use microwaves to transmit power to Earth from Solar Powered Satellites<br />To efficiently make use of renewable energy i.e., solar energy<br />Solar Powered Satellites are placed in geostationary orbits<br />4/20/2011<br />Wireless Power Transmission<br />12<br />
  14. 14. From the Satellite<br />Solar power from the satellite is sent to Earth using a microwave transmitter<br />Received at a “rectenna” located on Earth<br />
  15. 15. Possible Designs<br />
  16. 16.
  17. 17. Advantages over Earth based solar power<br />More intense sunlight<br />In geosynchronous orbit, 36,000 km (22,369 miles) an SPS would be illuminated over 99% of the time<br />No need for costly storage devices for when the sun is not in view<br />Only a few days at spring and fall equinox would the satellite be in shadow<br />
  18. 18. Other projects<br />Alaska’21<br />Grand Bassin<br />Hawaii<br />4/20/2011<br />Wireless Power Transmission<br />17<br />
  19. 19. Current Developments<br />
  20. 20.                                                                                                                                                   <br />SPS 2000<br />
  21. 21. Details<br />Project in Development in Japan<br />Goal is to build a low cost demonstration model by 2025<br />8 Countries along the equator have agreed to be the site of a rectenna<br />
  22. 22. Continued<br />10 MW satellite delivering microwave power<br />Will not be in geosynchronous orbit, instead low orbit 1100 km (683 miles)<br />Much cheaper to put a satellite in low orbit<br />200 seconds of power on each pass over rectenna<br />
  23. 23.
  24. 24. Advantages of Wireless energy transfer<br />Efficient<br />Easy<br />Need for grids, substations etc are eliminated<br />Low maintenance cost<br />More effective when the transmitting and receiving points are along a line-of-sight<br />Can reach the places which are remote<br />4/20/2011<br />Wireless Power Transmission<br />23<br />
  25. 25. Conclusions<br />More reliable than Traditional power<br />In order for WPT to become a reality it several things have to happen:<br />Government support<br />Cheaper launch prices<br />Involvement of the private sector<br />
  26. 26. References<br />S. Sheik Mohammed, K. Ramasamy, T. Shanmuganantham,” Wireless power transmission – a next generation power transmission system”, International Journal of Computer Applications (0975 – 8887) (Volume 1 – No. 13) <br />Peter Vaessen,” Wireless Power Transmission”, Leonardo Energy, September 2009 <br />4/20/2011<br />Wireless Power Transmission<br />25<br />
  27. 27. Contact:<br />Shubham Jain<br />Email: shubh000007@gmail.com<br />
  28. 28. THANK YOU!<br />4/20/2011<br />Wireless Power Transmission<br />27<br />