Wireless power transmission involves transferring energy from one place to another without wires. Historically proposed in 1899 but inefficient, modern wireless power focuses on magnetic resonance coupling developed at MIT in 2007. The document discusses the history and types of wireless power transmission, including inductive and magnetic coupling. Advantages are no wires or batteries needed while disadvantages include distance constraints and initial cost. Applications include consumer electronics and electric vehicle charging.

1.  WIRELESS POWER TRANSMISSION
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2. • OVERVIEW
 What is wireless power transmission(WPT)?
 Why is WPT?
 History of WPT
 Types of WPT
 Techniques to transfer energy wirelessly
 Advantages and disadvantages
 Applications
 Conclusion
 References
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3. What is WPT?
 The transmission of energy from one place to another
without using wires
 Conventional energy transfer is using wires
 But, the wireless transmission is made possible by
using various technologies
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4. Why not wires?
 As per studies, most electrical energy transfer is
through wires.
 Most of the energy loss is during transmission
• On an average, more than 30%
• In India, it exceeds 40%
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5. 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.
 The
efficient midrange power
transfer concept is Witricity. In
this model source and load are
in Magnetic resonance so there
is no power loss.

6. The forgotten invention is reborn in 2007
RESONANCE COUPLING
 A group of engineers at MIT came up with the idea to use resonant induction to
transmit power wirelessly.
“Resonance", a phenomenon that causes an object to vibrate when energy of
a certain frequency is applied.

7. Why WPT?
 Reliable
 Efficient
 Fast
 Low maintenance cost
 Can be used for short-range or
long-range.
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9. Energy Coupling
 The transfer of energy
 Magnetic coupling
 Inductive coupling
 Simplest Wireless Energy coupling is a transformer
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10. Advantages of WPT
 No wires
 No e-waste
 Need for battery is
eliminated
 Efficient energy transfer
 Harmless, if field
strengths under safety
levels
 Maintenance cost is less
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11. Disadvantages
 Distance constraint
 Field strengths have to be under safety levels
 Initial cost is high
 In RIC, tuning is difficult
 High frequency signals must be the supply
 Air ionization technique is not feasible
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12. Applications
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13. Conclusion
 Transmission without wires- a reality
 Efficient
 Low maintenance cost. But, high initial cost
 Better than conventional wired transfer
 Energy crisis can be decreased
 Low loss
 In near future, world will be completely wireless
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14. Thank You.
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