wireless power transmission123

8/7/2019 Wireless Power Transmission123

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DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING

ANURAG ENGINEERING COLLEGE(Accredited by NBA, New Delhi & Approved by AICTE, New Delhi & Affiliated to JNTU, Hyderabad)ANANTAGIRI (V), KODAD (M), NALGONDA (Dt).A.P.India -508206


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Wireless Power

Transmission

Wireless Power

Transmission

HEMAN REDDY G07C11A0421IV\IV ECE

PRADEEP KUMAR V V07C11A0454

IV\IV ECE


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Introduction,

Nikola Tesla

Introduction,

Nikola Tesla 1856-1943

Innovations:

Alternating current Wireless power

transmissionexperiments at

Wardenclyffe


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WardenclyffeWardenclyffe

1899

Able to light lampsover 25 miles away

without using wires High frequency

current, of a Teslacoil, could light

lamps filled withgas (like neon)


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1940s to Present1940s to Present

World War II developed ability to convertenergy 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


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Solar Power from SatellitesSolar Power from Satellites

1968s idea for Solar Power Satellitesproposed by Peter Glaser Would use microwaves to transmit power to

Earth from Solar Powered Satellites

Idea gained momentum during the OilCrises of1970s, but after prices stabilizedidea was dropped

US Department of Energy research program1978-1981


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From the SatelliteFrom the Satellite

Solar power from the satellite is sent

to Earth using a microwavetransmitter

Received at a rectenna located on

Earth


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MicrowavesMicrowaves

Frequency 2.45 GHz microwavebeam

Retro directive beam controlcapability

Power level is well below international

safety standard


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RectennaRectenna

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 about85% efficiency

Around 5km across (3.1 miles)

95% of the beam will fall on therectenna


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RectennaRectenna


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5,000 MW Receiving Station(Rectenna). This station is about a

mile and a half long.

5,000 MW Receiving Station(Rectenna). This station is about a

mile and a half long.


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Dipole AntennaDipole Antenna

Transmission of poweris simpler than TV &Radio

Transmitter: wire half awavelength

Pushes electrons backand forth

Receiver: wire half awavelength


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Antenna Radiation PatternAntenna Radiation Pattern


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Phased-array antennaPhased-array antenna

The for microwaves aresmall

Beam focusing: phased-array antenna

Electronically steered byvarying the timing orphase

Waves will merge

together


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Phased-Array AntennaPhased-Array Antenna


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Main lobe energyMain lobe energy

Circular central max

Main lobe

84% of energy

Sidelobes surround

No energy minima


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Early and simple schematic of how a space solar power satellite would beam

energy to electrical power grid on Earth.

Early and simple schematic of how a space solar power satellite would beam

energy to electrical power grid on Earth.


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1979SPSReference System concept

(GEO)

1979SPSReference System concept

(GEO)


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NASAs 1995-1997StudyNASAs 1995-1997Study

MEO (Mid-Earth Orbit)Sun Tower:

- 6 SPS yields near 24-hrpower to sites

- 30 degrees LatitudeCoverage

- Power services of 200-400 MW


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Integral Symmetrical ConcentratorIntegral Symmetrical Concentrator


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AdvantagesAdvantages

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 whenthe sun is not in view

No air or water pollution is created duringgeneration

Ground based solar only works during cleardays, and must have storage for night. Thusit is More reliable than ground based solarpower


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DisadvantagesDisadvantages

Interference with other electronic devices

Health and environmental effects

Possible health hazards Effects of long term exposure

Exposure is equal to the amount that peoplereceive from cell phones and Microwaves

Location The size of construction for the rectennas is

massive and also Implementation Complexity


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ProblemsProblems

Complexity30 years to complete

Size6.5 miles long by 3.3 miles wide

Transmitting antenna mile indiameter(1 km)

Cost$74 billion

Interference


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ConclusionConclusion

This idea worth to invest in since thistechnology brings in virtually unlimitedpower from the sun.

This also benefits the intercontinentalpower providers.

Absolutely environmentally friendly since itis emission-free.


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QUERIES?QUERIES?


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THANK Q

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