Wireless Power Transmission , Wireless Charging

Wire-less Power Transmission

WIRELESS POWER TRANSMISSIONPrasann shrivastava11010-7052Electronics and communicationManipal university jaipur

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What Is Wire-less Power Transmission ?

Wireless Power Transmission orWireless Energy Transmissionis the transmission of electrical energy from apower sourceto anelectrical loadwithout conductors.

25 November 2013PRASANN SHRIVASTAVA - 1101070522

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What Is Wire-less Power Transmission ?

Wireless transmission is useful in cases where interconnectingwiresare inconvenient, hazardous, and/or impossible.


Inelectrical engineering , two conductors are referred to asmutual-inductively coupledormagnetically coupledwhen they are configured such that change in current flow through one wire induces a voltage across the ends of the other wire throughelectromagnetic induction.

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History of WIRELESS POWER TRANSMISSIONIn 1901, Nikola Tesla used the Principle of electrodynamics induction to transfer electromagnetic energy without the need of wires to construct the Wardenclyffe tower (Figure 1) to transmit power between America and Europe but was destroyed by US government in 1917.



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Researches Over WIRELESS TRANSMISSIONIn 2007, MIT researchers proposed the wireless power transmission based on strong coupled magnetic resonance and successfully lightened a 60 W bulb over 2 meters with a transfer efficiency of 30%. In 2008, Intel demonstrated an experiment setup to lighten a 60 W bulb over 1 meter with the transfer efficiency of 70 %.25 November 2013PRASANN SHRIVASTAVA - 1101070526

FIND OUT25 November 2013PRASANN SHRIVASTAVA - 1101070527


Induction chargers typically use an induction coil to create an alternating electromagnetic field from within a charging base station, and a second induction coil in the portable device takes power from the electromagnetic field and converts it back into electrical current to charge the battery. The two induction coils in proximity combine to form an electricaltransformer.Greater distances between sender and receiver coils can be achieved when the inductive charging system usesresonant inductive coupling.

Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two coils that are tuned to resonate at the same frequency. The equipment to do this is sometimes called a resonant or resonance transformer.

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The technologies for wireless charging can be magnetic induction, radio frequency, optical or conduction.25 November 2013PRASANN SHRIVASTAVA - 1101070529

Magnetic induction converts electrical energy to magnetic energy. It allows transmission over an air gap and is typically short to midrange

For microwave or radio frequency, the parabolic dish focuses radio waves which are typically long range waves towards intended target.25 November 2013PRASANN SHRIVASTAVA - 11010705210

For optical or infrared, the laser light is focused on photovoltaic cells that convert light energy to power.

In conduction, the power transfer occurs due to metallic contact between transmitter and receiver. 25 November 2013PRASANN SHRIVASTAVA - 11010705211

Magnetic induction has two categories namely magnetic induction coupling and magnetic resonance coupling.In inductive coupling, the source drives a primary coil creating a sinusoidal varying magnetic field which induces a voltage across terminals of secondary coil, thus transferring power to load.Magnetic resonance coupling is more advantageous since it has an extended range and potential to support multiple receivers.25 November 2013PRASANN SHRIVASTAVA - 11010705212





An electric toothbrush's base and handle contain coils that allow the battery to recharge.

A Splashpower mat uses induction to recharge multiple devices simultaneously.16


this kind of setup could power or recharge all the devices in one room. Some modifications would be necessary to send power over long distances17


ADVANTAGESLIMITATIONSWireless A number of devices can be charged at a time Electrically safe Can be used in harsh environments due to encapsulation High power in output Waterproof Low maintenance Charging is convenientMore power consumption Low efficiency Heat generation is more than traditional charging Complex circuitry More costly Slow Charging High cost of manufacturing Harmful magnetic adiations emitted


APPLICATIONSIn Mobile Phones

In Cordless Phones

In Electric Car

In Laptops

In Low Power Consuming Appliances.25 November 2013PRASANN SHRIVASTAVA - 11010705220

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Demonstration of wireless charging 25 November 2013PRASANN SHRIVASTAVA - 11010705221

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PRODUCTS AVAILABLE IN MARKET



Conclusion Wireless energy transmission technology has been developed in which electrical energy is transmitted from power source to an electrical device without using wires. The technology has improved sustainability but still consists of various drawbacks which need to be researched upon in order to commercialize it.25 November 2013PRASANN SHRIVASTAVA - 11010705224

Thank You

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Technology

Wireless Power Transmission , Wireless Charging