wireless power transmission using microwave
DESCRIPTION
microwave power transmission,solar power satellite,future projectTRANSCRIPT
Submitted by:Shuvo Saha RoyDept: EEE,KUETRoll: 1003008Year:4th Term:1st Date:19-08-2014
Overview
Wireless power transmission(WPT)
Why WPT
Microwave Transmission
Microwave vs. laser transmission
Rectenna
Solar power Satellite
Current Developments
Advantages of WPT
Disadvantages of WPT
Applications
Microwave vs. Laser Transmission
Microwave Transmission
More developed High efficiency up
to 85% Beams are far below
the lethal levels of concentration even for a prolonged exposure
Causes interference with satellite communication industry
Laser Transmission
Recently developed solid state lasers allow efficient transfer of power
Range of 10% to 20% efficiency within a few years
Conform to limits on eye and skin damages
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
Solar power satellite(SPS) 1968’s idea for Solar power Satellites proposed by
Peter Glaser Would use microwaves to transmit power to earth
from space To efficiently make use of renewable energy i.e.
solar energy Solar powered satellites are placed in geostationary
orbits Solar power from the satellite is sent to earth using
a microwave transmitter Received at a “Rectenna” located on Earth
Architecture of Solar power Satellite(SPS)
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 Waste heat is radiated back into space Power can be beamed to the location where it is
needed, don’t have to invest in as large a grid No air or water pollution is created during generation
Current Development
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
10MW satellite delivering microwave power
Will not be in geosynchronous orbit , instead lower orbit 1100 km (683 miles)
Much cheaper to put a satellite in a low orbit
200 seconds of power on each pass over rectenna
Advantages of WPT
Efficient
Easy
The power could be transmitted to the remote places where the wired transmission is not possible
Need for grid, high tension transmission lines, substations are eliminated
Low maintenance cost
Power theft would be not possible at all
The power failure due to short circuit and fault on cables would never exist in the transmission.
The cost of transmission and distribution would become less
The cost of electrical energy for the consumer would be reduced also
Wireless charging would also possible
Vehicles would be driven using WPT, no need of fuel.
Disadvantages of WPT
Cost for practical implementation of WPT seems to be very high.
The other disadvantage of the concept is interference of microwave with present communication systems.
Applications of WPT
Solar Power Satellites (SPS) Moving targets such as fuel free airplanes,
fuel free electric vehicles, moving robots and fuel free rockets
Ubiquitous Power Source (or) Wireless Power Source
Wireless sensors RF Power Adaptive Rectifying Circuits (PARC)
Thank You All