04/10/2023 Wireless Power Transmission 1

WIRELESS POWER TRANSMISSION

SUBMITTED BY-Vivek kumar(EEE)

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• OVERVIEWWhat is wireless power transmission(WPT)?Why is WPT?History of WPTTypes of WPT

Techniques to transfer energy wirelesslyAdvantages and disadvantagesApplicationsConclusionReferences

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What is WPT?The transmission of energy from one place to

another without using wiresConventional energy transfer is using wiresBut, the wireless transmission is made

possible by using various technologies

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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%

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.

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.

The forgotten invention is reborn in 2007

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Why WPT?

ReliableEfficientFastLow maintenance costCan be used for short-range or long-range.

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Energy CouplingThe transfer of energy

Magnetic couplingInductive coupling

Simplest Wireless Energy coupling is a transformer

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Advantages of WPTNo wires

No e-wasteNeed for battery is

eliminatedEfficient energy

transfer Harmless, if field

strengths under safety levels

Maintenance cost is less

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DisadvantagesDistance constraintField strengths have to be under safety levelsInitial cost is highIn RIC, tuning is difficultHigh frequency signals must be the supplyAir ionization technique is not feasible

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Applications

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ConclusionTransmission without wires- a realityEfficientLow maintenance cost. But, high initial

costBetter than conventional wired transferEnergy crisis can be decreasedLow loss In near future, world will be completely

wireless

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Thank You.