Wireless power transfer involves transmitting electricity from a power source to electrical devices without wires. Nikola Tesla pioneered this in the late 1800s through inductive coupling and was able to transmit power over long distances, but lacked funding to fully develop his ideas. Modern research in wireless power transfer includes methods like inductive coupling for short ranges and resonant induction for medium ranges. Wireless power could be transmitted over long ranges through technologies like solar power satellites that collect solar energy in space and beam it to receivers on Earth, providing a continuous power source without the limitations of weather or time of day. However, challenges remain including high costs and potential health and environmental impacts that require further research and development.

1. GLOBAL INSTITUTE OF TECHNOLOGY
JAIPUR

3. • The transmission of energy from one place to
another without using wires.
• In Conventional, Power is transfer using
wires. But, the wireless transmission is made
possible by using various technologies.

4. • Nikola Tesla in late 1890s Pioneer of induction techniques
• His vision for “World Wireless System”
• The 187 feet tall tower to broadcast energy
• All people can have access to free energy
• Due to shortage of funds, tower did not operate.

5. • Tesla was able to transfer energy from
one coil to another coil .
• He managed to light 200 lamps from a distance of
40km.
• The idea of Tesla is taken in to research after 100 years
by a team led by Marin from MIT. The project
is named as ‘WiTricity’.

6. • 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 up to it exceeds 40%.

7. • Reliable
• Efficient
• Fast
• Low maintenance cost
• Can be used for short-range or long-range.

8. • Human beings or other objects placed between the
transmitter and receiver do not hinder the transmission
of power.
• Magnetic field tend to interact very weakly with the
biological tissues of the body, and so are not prone to
cause any damage to any living being.

9. There are mainly 3 major types of wireless power transfer-
• Short range – INDUCTIVE COUPLING
• Medium range – RESONANT INDUCTION
• Long range power transfer – ELECTROMEGNETIC WAVE

10. 1) Ground based power transmission
2) Space based power transmission
But Space-based power transmission is preferred over
Ground based power transmission Ground is (obviously) cheaper
per noontime watt, but:
•Space gets full power 24 hours a day
•3X or more Watt-hours per day per peak watt
• No storage required for nighttime power

11. •Space get full power 7 days a week – no cloudy days
•Space gets full power 52 weeks a year
• No long winter nights, no storms, no cloudy seasons
• Space delivers power where it’s needed
•Best ground solar sites (deserts) are rarely near users
•Space takes up less, well, space
•Rectennas are 1/3 to 1/10 the area of ground arrays
• Rectennas can share land with farming or other uses.

12. Solar Power Satellites (SPS) have proposed to collect solar
energy in space and beam it down to the Earth.

13. • There is no air in space, so the satellites would receive somewhat
more intense sunlight, unaffected by weather.
• The SPS concept is simpler than another power systems here on
earth.
• Solar radiation can be more efficiently collected in space, where it
is roughly three times stronger than on the surface of the Earth and
it can be collected 24 hours per day (since there are no clouds or
night in high Earth orbit).
• SPS does not use up valuable surface area on the Earth.

14. Four basic steps involved in the conversion of solar energy to
electricity and delivery are:
Capture solar energy in space and
convert it to electricity
Transform the electricity to radio
frequency energy and transmit it to
Earth
Receive the radio frequency energy on Earth
and convert it back to electricity
Provide the electricity to the utility grid

18. • Unlimited energy resource
• Energy delivered anywhere in the world
• Zero fuel cost
• Zero CO2 emission
• Minimum long-range environmental impact
• Solar radiation can be more efficiently collected in space

19. • Launch costs .
• Capital cost even given cheap launchers .
• Would require a network of hundreds of satellites.
• Possible health hazards.
• The size of the antennas and rectennas.
• Geosynchronous satellites would take up large sections of space .
• Interference with communication satellites .

20. More reliable than ground based solar power. In order
for SPS to become a reality it several things have to
happen:
•Government support
•Cheaper launch prices
•Involvement of the private sector
CONCLUSION