Wireless Power Transmission , Wireless Charging

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wireless power transmission , wireless charging , inductive charging

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  • In electrical engineering , two conductors are referred to as mutual-inductively coupled or magnetically coupled when they are configured such that change in current flow through one wire induces a voltage across the ends of the other wire through electromagnetic induction.
  • Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electrical current to charge the battery. The two induction coils in proximity combine to form an electrical transformer.Greater distances between sender and receiver coils can be achieved when the inductive charging system uses resonant inductive coupling.Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two coils that are tuned to resonate at the same frequency. The equipment to do this is sometimes called a resonant or resonance transformer.
  • An electric toothbrush's base and handle contain coils that allow the battery to recharge.A Splashpower mat uses induction to recharge multiple devices simultaneously.
  • this kind of setup could power or recharge all the devices in one room. Some modifications would be necessary to send power over long distances
  • Wireless Power Transmission , Wireless Charging

    1. 1. WIRELESS POWER TRANSMISSION - PR A SA NN SHR I VA S TAVA 1 1 0 1 0 -7052 E L E CT RO NICS A ND CO MMU NICATIO N MA NIPA L UNIVE R S IT Y J A I P U R
    2. 2. What Is Wire-less Power Transmission ? • Wireless Power Transmission or Wireless Energy Transmission is the transmission of electrical energy from a power source to an electrical load without conductors. PRASANN SHRIVASTAVA - 110107052 26 November 2013 2
    3. 3. What Is Wire-less Power Transmission ? • Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous, and/or impossible. PRASANN SHRIVASTAVA - 110107052 26 November 2013 3
    4. 4. History of WIRELESS POWER TRANSMISSION In 1901, Nikola Tesla used the Principle of electrodynamics induction to transfer electromagnetic energy without the need of wires to construct the Wardenclyffe tower (Figure 1) to transmit power between America and Europe but was destroyed by US government in 1917. PRASANN SHRIVASTAVA - 110107052 26 November 2013 4
    5. 5. • A magnetic field is created around the wire if electricity is transmitted down a wire Andre Marie Ampere PRASANN SHRIVASTAVA - 110107052 Michael Faraday • Faraday developed the fundamental law of induction, a process that enables the transfer of power from one wire to another using magnetic field. • Maxwell equation was established, which is the basis of several everyday devices including electrical motors and generators Maxwell 26 November 2013 5
    6. 6. Researches Over WIRELESS TRANSMISSION In 2007, MIT researchers proposed the wireless power transmission based on strong coupled magnetic resonance and successfully lightened a 60 W bulb over 2 meters with a transfer efficiency of 30%. In 2008, Intel demonstrated an experiment setup to lighten a 60 W bulb over 1 meter with the transfer efficiency of 70 %. PRASANN SHRIVASTAVA - 110107052 26 November 2013 6
    7. 7. FIND OUT PRASANN SHRIVASTAVA - 110107052 26 November 2013 7
    8. 8. PRASANN SHRIVASTAVA - 110107052 26 November 2013 8
    9. 9. The technologies for wireless charging can be magnetic induction, radio frequency, optical or conduction. PRASANN SHRIVASTAVA - 110107052 26 November 2013 9
    10. 10. • Magnetic induction converts electrical energy to magnetic energy. It allows transmission over an air gap and is typically short to midrange • For microwave or radio frequency, the parabolic dish focuses radio waves which are typically long range waves towards intended target. PRASANN SHRIVASTAVA - 110107052 26 November 2013 10
    11. 11. • For optical or infrared, the laser light is focused on photovoltaic cells that convert light energy to power. • In conduction, the power transfer occurs due to metallic contact between transmitter and receiver. PRASANN SHRIVASTAVA - 110107052 26 November 2013 11
    12. 12. Magnetic induction has two categories namely magnetic induction coupling and magnetic resonance coupling. In inductive coupling, the source drives a primary coil creating a sinusoidal varying magnetic field which induces a voltage across terminals of secondary coil, thus transferring power to load. Magnetic resonance coupling is more advantageous since it has an extended range and potential to support multiple receivers. PRASANN SHRIVASTAVA - 110107052 26 November 2013 12
    13. 13. PRASANN SHRIVASTAVA - 110107052 26 November 2013 13
    14. 14. PRASANN SHRIVASTAVA - 110107052 26 November 2013 14
    15. 15. PRASANN SHRIVASTAVA - 110107052 26 November 2013 15
    16. 16. PRASANN SHRIVASTAVA - 110107052 26 November 2013 16
    17. 17. PRASANN SHRIVASTAVA - 110107052 26 November 2013 17
    18. 18. PRASANN SHRIVASTAVA - 110107052 26 November 2013 18
    19. 19. ADVANTAGES •Wireless • A number of devices can be charged at a time • Electrically safe • Can be used in harsh environments due to encapsulation • High power in output • Waterproof • Low maintenance • Charging is convenient PRASANN SHRIVASTAVA - 110107052 LIMITATIONS •More power consumption • Low efficiency • Heat generation is more than traditional charging • Complex circuitry • More costly • Slow Charging • High cost of manufacturing • Harmful magnetic adiations emitted 26 November 2013 19
    20. 20. APPLICATIONS In Mobile Phones In Cordless Phones In Electric Car In Laptops In Low Power Consuming Appliances. PRASANN SHRIVASTAVA - 110107052 26 November 2013 20
    21. 21. Demonstration of wireless charging PRASANN SHRIVASTAVA - 110107052 26 November 2013 21
    22. 22. PRODUCTS AVAILABLE IN MARKET PRASANN SHRIVASTAVA - 110107052 26 November 2013 22
    23. 23. PRASANN SHRIVASTAVA - 110107052 26 November 2013 23
    24. 24. Conclusion Wireless energy transmission technology has been developed in which electrical energy is transmitted from power source to an electrical device without using wires. The technology has improved sustainability but still consists of various drawbacks which need to be researched upon in order to commercialize it. PRASANN SHRIVASTAVA - 110107052 26 November 2013 24
    25. 25. Thank You 

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