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BY ECE 3 YEAR,

MVGR COLLEGE OF

ENGINEERING,VIZIANAGARAM.

DIVYA SINDHU.B09335A0403.

GIRIJA.G

09335A0407.

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INTRODUCTIONy The concept of wireless power transfer (WPT)has been

around since the mid 17th century.The Founder of AC

Electricity ,NIKOLAS TESLA,was first to conductexperiments dealing with WPT.

y The term WPT states to transfer electrical power froma source to a device without aid of wires.

yThe three main systems used for WPT areMICROWAVES,SOLARCELLS,RESONANCE.

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DEFINITIONS OF THREE TYPESy MICROWAVES:

Microwaves would be used to sendelectromagnetic radiation from a power source to areciever in an electrical device.

y SOLARCELLS:

Solarcells,ideally,would use a satellite in space tocapture the suns energy and send the energy back to earth.

y RESONANCE:The concept of resonance causes electromagnetic

radiation at certain frequencies to cause an object to vibrate

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Wireless PowerTransmission

for Rover Operations

in Shadowed Craters

Solar Power

Generation on

Mountaintop

Direct

CommunicationLink

Moons Orbit

North Pole (SEE BELOW)

South Pole (SEE BELOW)

Sun Rays are Horizontal

at North & South Poles

NEVER shine into Craters

ALWAYS shine on Mountain

POSSIBLE ICE DEPOSITSCraters are COLD: -300F (-200C)

Frost/Snow after Lunar Impacts

Good for Future Human UsesGood for Rocket Propellants

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Solar Power from Satellitesy 1968s idea for Solar Power Satellites proposed by Peter

Glasery Would use microwaves to transmit power to Earth from

Solar Powered Satellites

y Idea gained momentum during the Oil Crises of 1970s,but after prices stabilized idea was droppedy US Department of Energy research program 1978-1981

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MicrowavesyFrequency 2.45 GHz microwave beam

yRetro directive beam control capability

yPower level is well below internationalsafety standard

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Rectenna

An antenna comprising a mesh of dipoles and diodes for

absorbing microwave energy from a transmitter andconverting it into electric power.

yMicrowaves are received with about 85%efficiency

yAround 5km across (3.1 miles)

y95% of the beam will fall on the rectenna

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SPS 2000

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Legal IssuesyWho will oversee?

y Environmental Concerns

y International

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Specificationsy Collector area must be between 50 (19 sq miles) and

150 square kilometers (57 sq miles)

y

50 Tons of materialy Current rates on the Space Shuttle run between

$3500 and $5000 per pound

y 50 tons (112,000lbs)=$392,000,000

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Conclusionsy More reliable than ground based solar power

y In order for SPS to become a reality it several things

have to happen:y Government support

y Cheaper launch prices

y Involvement of the private sector

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ANY QUERIES??????