Wireless Power Transmission Ppt

Presented by

Shubham Jain

Wireless Power Transmission

0809010094 Department of Computer Science Engineering IEC College of Engineering and Technology, Gr.Noida

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Overview        

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What is wireless power transmission(WPT)? Why is WPT? 1940’s to Present Microwave transmission Rectenna Applications Space-based solar power SPS 2000

Advantages Conclusion References 

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Wireless Power Transmission

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What is WPT?  The

transmission of energy from one place to another without using wires  Conventional energy transfer is using 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%Wireless Power Transmission 

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Why WPT? Reliable Efficient Fast Low

maintenance cost Can be used for short-range or long-range. Wireless Power Transmission

1940’s to Present  World

War II developed ability to convert energy to microwaves using a magnetron, no method for converting microwaves back to electricity  1964 William C. Brown demonstrated a rectenna which could convert microwave power to electricity

Microwave transmission 

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Microwave transmission refers to the technology of transmitting information by the use of radio waves whose wavelengths are conveniently measured in small numbers of centimeters; these are called microwaves. This part of the radio spectrum ranges across frequencies of roughly 1.0 gigahertz (GHz) to 30 GHz. These correspond to wavelengths from 30 centimeters down to 1.0 cm.

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Microwave Power Transfer(MPT) Cont.  

 Transfers

high power from one place to another. Two places being in line of sight usually  Steps:   

Electrical energy to microwave energy Capturing microwaves using rectenna Microwave energy to electrical energy Wireless Power Transmission

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MP T (cont.…)  AC

can not be directly converted to microwave energy  AC is converted to DC first  DC is converted to microwaves using magnetron  Transmitted waves are received at rectenna which rectifies, gives DC as the output  DC is converted back to AC Wireless Power Transmission

Rectenna 

“An antenna comprising a mesh of dipoles and diodes for absorbing microwave energy from a transmitter and converting it into electric power.”

 Microwaves

are received with about 85% efficiency.  Around 5km across (3.1 miles)  95% of the beam will fall on the rectenna.

5,000 MW Receiving Station (Rectenna). This station is about a mile and a half long in US.

Applications

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Space-based solar power   1968’s

idea for Solar Power Satellites proposed by Peter Glaser  Would use microwaves to transmit power to Earth from Solar Powered Satellites  To

efficiently make use of renewable energy i.e., solar energy  Solar Powered Satellites are placed in geostationary orbits Wireless Power Transmission

From the Satellite Solar

power from the satellite is sent to Earth using a microwave transmitter Received at a “rectenna” located on Earth

Possible Designs

Advantages over Earth based solar power  More

intense sunlight  In geosynchronous orbit, 36,000 km (22,369 miles) an SPS would be illuminated over 99% of the time  No need for costly storage devices for when the sun is not in view 

Only a few days at spring and fall equinox would the satellite be in shadow

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Other projects  Alaska’21       Grand

Bassin

 Hawaii Wireless Power Transmission

Current Developments

SPS 2000

Details  Project

in Development in Japan  Goal is to build a low cost demonstration model by 2025  8 Countries along the equator have agreed to be the site of a rectenna

Continued 

10 MW satellite delivering microwave power  Will

not be in geosynchronous orbit, instead low orbit 1100 km (683 miles)  Much cheaper to put a satellite in low orbit  200 seconds of power on each pass over rectenna

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Advantages of Wireless energy transfer  Efficient  Easy  Need

for grids, substations etc are eliminated  Low maintenance cost  More effective when the transmitting and receiving points are along a lineof-sight  Can reach the places which are remote Wireless Power Transmission

Conclusions  More

reliable than Traditional power  In order for WPT to become a reality it several things have to happen:    

Government support Cheaper launch prices Involvement of the private sector

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References 

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S. Sheik Mohammed, K. Ramasamy, T. Shanmuganantham,” Wireless power transmission – a next generation power transmission system”, International Journal of Computer Applications (0975 – 8887) (Volume 1 – No. 13) Peter Vaessen,” Wireless Power Transmission”, Leonardo Energy, September 2009 Wikipedia Wireless Power Transmission

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THANK YOU! Wireless Power Transmission