OVERVIEW

ABSTRACT

BLOCK DIAGRAM

WHAT IS WIRELESS POWER TRANSMISSION?

WHY WIRELESS POWER TRANSMISSION?

ADVANTAGES

DISADVANTAGES

APPLICATIONS

CONCLUSION

ABSTRACT

The main objective of this project is to develop a device for wireless power transfer. The concept of wireless power transfer was realized by Nikolas tesla. Wireless power transfer can make a remarkable change in the field of the electrical engineering which eliminates the use conventional copper cables and current carrying wires. Based on this concept, the project is developed to transfer power within a small range. This project can be used for charging batteries those are physically not possible to be connected electrically such as pace makers (An electronic device that works in place of a defective heart valve) implanted in the body that runs on a battery. The patient is required to be operated every year to replace the battery. This project is designed to charge a rechargeable battery wirelessly for the purpose. Since charging of the battery is not possible to be demonstrated, we are providing a DC fan that runs through wireless power.

This project is built upon using an electronic circuit which converts AC 230V 50Hz to AC 12V,

High frequency. The output is fed to a tuned coil forming as primary of an air core transformer. The secondary coil develops a voltage of HF 12volt. Thus the transfer of power is done by the primary (transmitter) to the secondary that is separated with a considerable distance (say 3cm). Therefore the transfer could be seen as the primary transmits and the secondary receives the power to run load.

Moreover this technique can be used in number of applications, like to charge a mobile phone, iPod, laptop battery, propeller clock wirelessly. And also this kind of charging provides a far lower risk of electrical shock as it would be galvanically isolated. This concept is an Emerging Technology, and in future the distance of power transfer can be enhanced as the research across the world is still going on.

BLOCK DIAGRAM

HARDWARE REQUIREMENTS:HF-Transformer, HF-diodes, rectifier, Transistors, Two air filled inductor coils, Voltage regulator, BLDC fan

WHAT IS WIRELESS POWER TRANSMISSION

The transmission of energy from one place to another without using wires

Conventional energy transfer is using wires

The power can be transmitted using electromagnetic waves like microwaves, radio waves or lasers.

WHY NOT WIRES

40% as per studies, most electrical energy transfer is through wires.

Most of the energy loss is during transmissiono On an average, more than 30%o In India, it exceeds

WHY WIRELESS POWER TRANSMISSION

Reliable

Efficient

Fast

Low maintenance cost Can be used for short-range or long-range

AN EXAMPLE -

ADVANTAGES

No wires

No e-waste

Need for battery is eliminated

Efficient energy transfer using Resonance Inductive Coupling (RIC)

Harmless, if field strengths under safety levels

Maintenance cost is less

DISADVANTAGES

Distance constraint

Field strengths have to be under safety levels

Initial cost is high

In RIC, tuning is difficult

High frequency signals must be the supply

Air ionization technique is not feasible

APPLICATIONS

Contactless smart card

High voltage (one million volt) sources for X-ray production

Tesla coils

Some Passports

Recharging mobiles or computers, tooth brush etc.

CONCLUSION

Transmission without wires- a reality

Efficient

Low maintenance cost. But, high initial cost

Better than conventional wired transfer

Energy crisis can be decreased

Low loss

In near future, world will be completely wireless