Wireless power transfer

Wireless Power Transfer

Presented by:

Abinash ChoudhuryRoll no.=11EEE005Reg no.=1101210761

Contents

• Introduction• History• Principle• Electromagnetic Induction effect• Lasers• Micro Wave Transmission• Rectenna• Application• Future world markets• Conclusion

Wireless power transfer is the process that takes place in any system where electrical energy is transmitted from a power source to an electrical load without interconnecting wires. Wireless transmission is useful in cases where instantaneous & continuous energy transfer is needed but interconnecting wires are inconvenient, hazardous, or impossible.

Introduction

History

Father of Wireless energy transmission: Nikola Tesla

• 1891- Nikola Tesla – Hertz Wave Transmitter• 1917 – Nikola Tesla – Warden Clyffe Tower

• The basic Principle we use in the wireless power transmission is Induction.

Example: Transformer Drawback of Induction : Short range

• So we thought to adapt advanced technologies like1. Electromagnetic Induction effect2. Lasers3. Micro Wave Transmission

Principle

Electromagnetic Induction effect

• The term electromagnetic induction refers to the generation of an electric current by passing a metal wire through a magnetic field.

Lasers• In the case of electromagnetic radiation closer to visible

region of spectrum (10s of microns(um) to 10s of nm), power can be transmitted by converting electricity into a laser beam that is then pointed at a solar cell receiver. This mechanism is generally known as "power beaming" because the power is beamed at a receiver that can convert it to usable electrical energy.

• Model of Laser Transmitter

• Laser Power Transmitter

• Power transmission via Micro waves can be made more directional, allowing longer distance power beaming, with shorter wavelengths of electromagnetic radiation, typically in the microwave range. A Rectenna may be used to convert the microwave energy back into electricity. Rectenna conversion efficiencies exceeding 95% have been realized. Power beaming using microwaves has been proposed for the transmission of energy from orbiting solar power satellites to Earth and the beaming of power to spacecraft leaving orbit has been considered.

Micro Wave Transmission

Rectenna• It is a rectifying antenna• Converts microwave energy into DC• Consists of mesh of dipole antennas• Microwaves are received with about 85% efficiency

Circuit Diagram

Application

• Wireless Parking Charger

• Wireless Electronics Charger

Future World Markets

Advantage & Disadvantage

Advantage

• Unaffected by day-night cycle, weather or seasons.

• This is an Eco-friendly, renewable and maintenance free energy resource unlike the conventional fuels.

• Waste heat is re-radiated back into space.

Disadvantage

• Initial spending cost is high.

• Maintenance is Complicated.

Conclusion

• More reliable than ground based solar power.

• If we develop this ,we need not bother about the exhaustion of natural resources.

• If this project succeeds it will become a boon to the next generations.

THANK YOU…

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