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.
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