PRESENTED BY-SHASHANK KAMAL

SHUBHAM JAIN

Wireless Power Transmission

2Wireless Power Transmission

About topicWhat does wireless meanHistoryTypes of W.P.T

Atmospheric conduction method Electrodynamic induction method

Positive points and Negative PointsApplicationsConclusionReferences

OVERVIEW

About Topic• Major Issue is loss of Energy during Transmission

and Distribution.

• Approximately 26% power is lost during transmission and distribution.

• The main reason of loss is Resistance of Wires.

• According to the World Resources Institute (WRI), India has maximum loss of power i.e. about 27-40%.

• Tesla had proposed methods of transmission of electricity using electromagnetic induction.

What does WIRELESS mean?

• The word wireless means “without wire”.

• Wireless energy transfer or wireless power is the transmission of electrical energy from a power source to an electric load without interconnecting man made conductors.

• Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous or impossible.

METHODS

Different methods of transmission proposed by different scientist and scholars are:

1. Atmospheric conduction method of Tesla

2. Electrodynamic induction method: Microwave method Laser method

Atmospheric conduction method• In 1899 Sir NICOLAI TESLA and HEINRICH

HERTZ powered a fluorescent lamp keeping it 25 miles away from source without using wire.

• Wireless power transmission experiments at WARDEN CLYFFE High frequency current, of a Tesla coil, could light lamps filled with gas (like neon).

• In this method a closed circuit is made using transmitter, ionized path between upper atmosphere and transmitter, second ionized path connecting receiver.

• The circuit back to the transmitter is completed through the earth .

Atmospheric conduction method• High potential is maintained at transmitter and

receiver end as well. A high potential transmitter transmits an “electromotive impulse” .

• It ionizes the air, and this air between the transmitter and receiver would conduct like a neon tube .

Image reference: Dr. Tesla Weather Control: http://www.aniruddhafriend-samirsinh.com/wp-content/uploads/2015/11/Dr.-Nikola-Tesla-Weather-Control.jpg

LIMITATIONS OF ATMOSPHERIC CONDUCTION METHOD

• Economically challenging.

• Periodic changes in atmospheric condition.

• Maintaining high tower potential every time.

ELECTRODYNAMIC INDUCTION METHOD We bring electromagnetic radiation into

practice, which uses far field technique in order to achieve range into kilos, which includes two techniques:

• LASERS• MICROWAVE

Image Reference: Laser Based Power Transmission: https://upload.wikimedia.org/wikipedia/commons/6/66/Space_to_ground_microwave,_laser_pilot_beam.png

10Wireless Power Transmission

LASER is highly directional, coherentNot dispersed for very long distanceBut, gets attenuated when it propagates

through atmosphereSimple receiver

Photovoltaic cellCost-efficient

LASER transmission

LASER METHOD• In the case of electromagnetic radiation, power

can be transmitted by converting electricity into a laser beam.

• LASER is then pointed at a solar cell receiver.

• This mechanism is generally known as "power beaming“.

CURRENTCURRENT

LASERTRANSFORMEROPTICAL FIBRE

MICROWAVE METHOD

• Power transmission via radio waves can be made more directional, allowing :

longer distance power beaming, with shorter

wavelengths of electromagnetic radiation.

A Rectenna may be used to convert the microwave energy back into electricity.

Rectenna conversion efficiencies exceeding 95% have been realized.

05/03/2023 13Wireless Power Transmission

Wave Coupling extends the Principle of Electromagnetic Induction.

Power beaming using microwaves has been proposed for the transmission of energy from orbiting solar power satellites to Earth

Image Reference: Microwave Power Transmission: http://large.stanford.edu/courses/2010/ph240/ma1/images/f2big.gif

05/03/2023 14Wireless Power Transmission

Near field energy transfer

Electric Automobile charging

Consumer Electronics

Industrial Purposes

Far field energy transfer

Energy to remote areas

Applications

05/03/2023 15Wireless Power Transmission

Efficient Easy Need for grids, substations etc. are

eliminated Low maintenance cost More effective when the transmitting and

receiving points are along a line-of-sight Can reach the places which are remote

Advantages

05/03/2023 16Wireless Power Transmission

When microwaves are used, interference may arise.

When LASERs are used there is a lot of absorption loss.

Its radioactive in nature.

Distance constraint: initial cost is high.

Field strength has to be under safety levels.

Disadvantages

05/03/2023 17Wireless Power Transmission

Transmission without wires will become a reality.

Efficient. Low maintenance cost. Better than conventional wired transfer. Energy charges can be decreased. Low loss. In near future, world will be completely

wireless.

Conclusion

05/03/2023 18Wireless Power Transmission

Wireless Power Transmission- Wikipedia https://en.wikipedia.org/wiki/Wireless_power_transfer

WiTricity- Wikipedia https://en.wikipedia.org/wiki/WiTricity

Feasibility of Wireless Power Transmission : Biswa, Rajen

http://www.academia.edu/1561057/Feasibility_of_Wireless_Power_Transmission

• Wireless Power-Robokid249 http://www.instructables.com/id/Wireless-Power-Transmission-Over-Short-Distances-U/

References