Sartaj witricity
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Sartaj witricity

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YES,,,,,,, WITH MY PPT I CAN PROVE IT,,,,,,,,,,,,,,,,,,,,,,,,,,,wire less electricity,,,,,,,kill of cables,,,,,,,,,,,,,

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  • 1. “Wireless Electricity”PRESENTED BY: SHAIK SARTAJAHMED
  • 2.  What do you mean by Wi Tricity ? Need of witricity History of wireless power Witricity Basics Detailed Principle How Safe is Wi Tricity ? Whats the Future of WiTricity ? Advantages Limitations Bibliography
  • 3.  The Transfer of Electricity from one place to another without wires is known as “WiTricity”. On June 7 ’07, a team of researchers at MIT announced the successful operation of WiTricity concept. They had lit up a 60W bulb with a power source at a distance of 7 feet(over 2m) with no wires.
  • 4. In 1891, Sir Nikola Tesla Proposed a method of Wireless Power Transmission. As it is in Radiative mode, most of the Power was wasted and has less efficiency. In 2005, Dave Gerding coined the term WiTricity which is being used today. Forgotton invention was reborn in 2007
  • 5.  In 1891, Nikola Tesla invented a type of resonant transformer called the Tesla coil, which was used to generate very high voltage, low current, and high frequency alternating electricity. He experimented with a large variety of coils and configurations, one of which is as:
  • 6.  In1899,Tesla achieved a major breakthrough in his work at Colorado by transmitting 100 million volts of electric power wirelessly over a distance of 26 miles to light up a bank of 200 light bulbs and run one electric motor.
  • 7.  Cell phones, i pods, laptop computers are capable of re-charging themselves without ever being plugged in.
  • 8.  Currently, wired electricity powers have concured nearly everything. In present electricity generation system we waste more than half of its resources. Especially the transmission and distribution losses are the main concern of the present power technology.
  • 9.  The resistance of the wire used in the electrical grid distribution system causes a loss of 26-30% of the energy generated The transmission of power without wires may be one noble alternative for electricity transmission.
  • 10.  Prof. Marin Soljacic from Massachusetts Institute of Technology (MIT), is the one who has proved that magnetic coupled resonance can be utilized in order to transfer energy without wires. He used Michael Faradays principle of electromagnetic induction (1831) came up with WiTricity.
  • 11.  There are 3 major types of wireless energy transfer: – Short range; Inductive Coupling – Medium range; Resonant Induction – Long range; Electromagnetic Wave Power Transfer
  • 12.  What Is Inductive Coupling? Inductive Coupling is a method for short range wireless energy transfer. Its range can vary, but it’s often very short.
  • 13.  Inductive coupling works on theprinciples of electromagnetism:When a current (electricity) passesthrough a wire, it generates a magneticfield perpendicular to the wire.When a wire is in proximity to amagnetic field, it generates a current inthat wire.Magnetic fields decay quickly , makinginductive coupling effective only at veryshort ranges.
  • 14.  What Is Resonant Induction? A group of engineers at MIT came up with the idea to use resonant induction to transmit power wirelessly. They deemed their result “WiTricity” (like Wi-Fi) . WiTricity can transmit electricity wirelessly at 40% efficiency to about 7 feet.
  • 15.  Resonant induction still uses the same principles as magnetic induction (magnetic fields to transfer current) , but it uses resonance to increase the range at which the transfer can efficiently take place. “Resonance", a phenomenon that causes an object to vibrate when energy of a certain frequency is applied.
  • 16.  Everything resonates at a certain frequency, based on its shape and material. Energy transfers easily between resonating objects. An example of this is when an opera singer shatters wine glasses by singing at the frequency at which the glasses resonate. With resonant induction, power is transmitted between two resonating coils.
  • 17.  Consider two self resonating copper coils of same resonating frequency with a diameter 20 inches each. One copper wire is connected to the power source , while the other copper wire is connected to the device.
  • 18.  A Tesla Coil produces high voltage electric arcs. These arcs cause permanent damage to electrical devices on contact Tesla coils also destroy hearing aids and cardiac pacemakers in their vicinity.
  • 19.  Is WiTricity safe? How much power can be transferred? What about the range of transferred? How efficient is WiTricity? Whats the Future of WiTricity?
  • 20.  The rate of energy transfer between the emitter and the receiver is greater than the rate of energy dissipation. Efficiency is mesured by measuring the current at the midpoint of the self resonant coils with a current probe. This gives a measurement of the current parameters
  • 21.  We then compute power dissipated in each coil from:- Then the efficiency can be calculated .
  • 22.  Direct Wireless Power ◦ No device needs wires ◦ Immobile devices Automatic Wireless Charging ◦ Device with rechargeable batteries ◦ charges itself ◦ Mobile device ◦ Used in and out of range of its WiTricity power source
  • 23.  Consumer Electronics Industrial Transportation Miscellaneous
  • 24.  Will it harm me? Will it harm the environment? Will it interfere with important communication?
  • 25.  Human beings or other objects placed between the transmitter and receiver do not hinder the transmission of power. However, does magnetic coupling or resonance coupling have any harmful effects on humans? magnetic fields tend to interact very weakly with the biological tissues of the body, and so are not prone to cause any damage to any living beings.
  • 26.  Safe, fairly efficient, good range: Magnetic fields interact weakly with biological masses (humans), Efficiency can be increased with time, most of the 60% lost is from heat radiated from the coils. Theoretically one stationary coil in a room could power multiple devices with receiving coils. No more messy wires, and with widespread enough use it could even eliminate costly batteries.
  • 27.  The resonance condition should be satisfied and if any error exists, there is no possibility of power transfer. If there is any possibility of very strong ferromagnetic material presence causes low power transfer due to radiation.
  • 28.  MITs WiTricity is only 40 to 45% efficient and they have to be twice as efficient to compete with the traditional chemical batteries. Aim is to get a robotic vacuum or a laptop working, charging devices placed anywhere in the room The researchers have said that in another five years time, they will come up with a WiTricity system for commercial use.
  • 29. 1. An article published in the Science Magazine as “Wireless Power Transfer via Strongly Coupled Magnetic Resonances” by Andre kurs, Science 317, 83(2007); Dol:10.1126/ science.1143254.2. H. Haus , “Waves and Fields in Optoelectronics”, Prentice hall Publishers, Englewood3. “Efficient Non-Radiative Midrange Energy Transfer” by Aristeidies karalis, Marlin Soljacic.5. Nikola Tesla, My Inventions, Ben Johnston, Ed., Austin, Hart Brothers, p. 91,1982.6. Thom as F. Valone, “ Tesla’ s Wireless Energy... For the 21 st Century!!! One Step Beyond Direct TV!!!” Extra Ordinary Technology, 1, no. 4, Oct / Nov / Dec 2003.7. James O. McSpadden, “ Wireless Power Transmission Demonstration”, Texas A&M University, June, 1997.8. Charych Arthur (Setauket, NY), “ System and method for wireless electrical power transmission”, Patent No. 6,798,716, September 28, 2004.9. Joe T. Howell, et. al , “Advanced receiver / converter experiments for laser wireless power transmission” 5th. Wireless transmission conference, pp 1-8, Garanda, Spain,2004.