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Wireless power transmission

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wireless mobile charger

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Wireless power transmission

  1. 1. SUBMITTED BY : MOHAMMAD AZHAR Enrollment Number 2014-333-031 BTECH(ECE) 5th SEM SUBMITTED TO Department of Computer Science & Engg. JAMIA HAMDARD WIRELESS POWER TRANSMISSION (WIRELESS MOBILE CHARGER)
  2. 2. INTRODUCTION Wireless power transfer can make electronic devices like cell phones, household robots, mp3 players, laptop computers and other portable electronics wire-free. Resonant inductive coupling which is one of the various power transmission techniques is demonstrated here.
  3. 3. ABSTRACT  Many researchers have developed several techniques for moving electricity over long distances without wires.  Two objects having same resonating frequency and in magnetic resonance tend to exchange energy, while dissipating relatively little energy to the extraneous off- resonant objects.
  4. 4. WORKING PRINCIPLE This circuit mainly works on the principle of mutual inductance. Power is transferred from transmitter to the receiver wirelessly based on the principle of “inductive coupling”. Inductance is the property of the conductor, in which the current flowing in a conductor induces a voltage or electromotive force in it or in another nearby conductor. There are two types inductance. 1) Self inductance, 2)Mutual Inductance. “Mutual inductance” is the phenomena in which, when a current carrying conductor is placed near another conductor voltage is induced in that conductor. This is because, as the current is flowing in the conductor, a magnetic flux is induced in it. This induced magnetic flux links with another conductor and this flux induces voltage in the second conductor. Thus two conductors are said to be inductively coupled.
  5. 5. RESONANT INDUCTIVE COUPLING  Inductive charging uses an electromagnetic field to transfer energy between two objects.  Greater distances can be achieved by using resonant inductive coupling.  Resonant inductive coupling or electrodynamic induction is the near field wireless transmission between two coils that are tuned to resonate at the same frequency.
  6. 6. RESONANT INDUCTIVE COUPLING  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.
  7. 7. COTINUE............. •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.
  8. 8. BLOCK DIAGRAM
  9. 9. Hardware specification •Transistor 1351 •Resistor •Zener diode •7805 voltage regulator •Capacitor •USB female port
  10. 10. TRANSMITTER CIRCUIT
  11. 11. RECEIVER CIRCUIT
  12. 12. APPLICATIONS  Provides charging stations for handheld devices like phones ex:powermat, removes the need for multiple power sockets  Can operate appliances like tv  Electric car manufacturers consider it for charging electric cars, currently using wires for this purpose is not entirely practical
  13. 13. ADVANTAGES  Non-radiative energy transfer is safe for people and animals.  Highly resonant strong coupling provides high efficiency over distance.  Does not interfere with radio waves.
  14. 14. LIMITATION OF THE CIRCUIT  Power is somewhat wasted due to mutual induction.  It will work for very short distances only. If you want to use it for long distances, then the number of inductor turns should be high.
  15. 15. CONCLUSION  Wireless power transfer is quickly becoming a viable reality.  This technology offers an extremely efficient alternative to previous attempts at providing wireless power.  Future improvements in wireless technology offer world changing implications.
  16. 16. RFERENCES  Websites:  www.google.co.in  all about circuit-basic electronic equipment function  Wikipedia-www.wikipedia.org  http://www.instructables.com/id/Wireless-Ipod- Charger/?ALLSTEPS

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