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Wireless Electricity
This document discusses wireless power transmission through resonant inductive coupling, also known as Witricity. It begins with a brief history of wireless power, including Nikola Tesla's early proposals and recent work by MIT engineers to use resonant induction. The document then covers the basics of Witricity, including near and far field transmission methods, inductive coupling, and creating resonant induction circuits. It discusses efficiency and applications like charging electric cars wirelessly. Finally, it addresses the future potential of creating wireless power hotspots everywhere to eliminate the need for charging batteries with wires.
Wireless Electricity
- 1. By Brian Dsouza Ec- 8th sem WITRICITY SCEM DEPT OF EC 1
- 2. Contents: Why wireless power? Briefhistory Introduction Ways of electricity transmission Illustration of wireless electricity Applications Future implications Conclusion SCEM DEPT OF EC 2
- 3. We Humans LoveElectricity! SCEM DEPT OF EC 3 And to power our electronic devices we buy: 40 million disposable batteries/yr !
- 4. SCEM DEPT OFEC 4 This is where it ends up:
- 5. Wire ... Aburden... 5SCEM DEPT OF EC
- 6. SCEM DEPT OFEC 6 History of wireless power • In 1899, 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.
- 7. A group ofengineers at MIT came up with the idea to use resonant induction to transmit power wirelessly. The forgotten invention is reborn in 2007 SCEM DEPT OF EC 7
- 8. SCEM DEPT OFEC 8 Ways of Transmission Near field 1. Induction 2. Resonant induction Far field 1. Radio and microwave transmission 2. Laser
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- 10. Witricity Basics Resonance isthe tendency of a system to oscillate with greater amplitude at some frequencies than at others. Two conductors are mutual-inductively 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. SCEM DEPT OF EC 10
- 11. Basic Principle ofResonant Induction The basic principle involved in Witricity concept is two coils having same resonating frequency tend to exchange maximum energy. SCEM DEPT OF EC 11
- 12. Circuit Diagram ofRIC SCEM DEPT OF EC 12
- 13. Creating basic resonantinduction circuitary Primary coil setup: SCEM DEPT OF EC 13
- 14. The Secondary Coil: •Thiscircuit is one of the simplest you can ever create. •It is composed of magnet wire coil but smaller than the primary, a capacitor also like the primary, and some leads you can attach things like LED. 14SCEM DEPT OF EC
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- 16. Effeciency chart ofwitricity 16SCEM DEPT OF EC Experimental results of MIT experiment
- 17. Increasing Range SCEM DEPTOF EC 17
- 18. 18 Advantages of thistechnique No wires Need for battery is eliminated ewaste is eliminated Maintenance cost is Saves infrastructureless Range can be increased SCEM DEPT OF EC
- 19. Disadvantages of ResonantWireless electricity: 19 Distance constraint Initial cost is high In RIC, tuning is difficult High frequency signals must be the supply SCEM DEPT OF EC
- 20. How Safe isWitricity? Human beings or other objects placed between the transmitter and receiver do not hinder the transmission of power. 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. 20SCEM DEPT OF EC
- 21. 21 Wireless Electricity Applications In Immobile devices Cellphones , Tv’s , remotes Medical applications Industrial applications SCEM DEPT OF EC
- 22. Charging Electric Carusing WiTricity SCEM DEPT OF EC 22
- 23. Future of WirelessElectricity 23SCEM DEPT OF EC
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- 25. Think that thecity will be covered with WiTricity hot spots , just like Wireless Internet, there will be no need of charging batteries, or carrying adapters all around ! 25SCEM DEPT OF EC
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