Wireless power transfer (Wireless lighting)

Wireless power transfer is a new technology to transfer electrical power without any physical contact between the source and the load. The aim of this paper is to propose the use of a simple, cheap and easy technique for mid range wireless power transfer. The various technologies available so far for wireless transmission of electricity and the need for a wireless system of energy transmission are discussed here. The main problem is how power is transferred wirelessly without any bad effect on environment and human. The core of the used technology is making use of the magnetic resonance concept for transmitting the power wirelessly. Electric power is transferred at a frequency of about 100 kHz in a medium distance range to light on a 3 watt lamp making use of resonance. An impedance compensating network is used to achieve maximum power transfer. The practical results are very close to these obtained using the mathematical model and the theoretical calculations. The advantages, disadvantages and new applications of Witricity are enumerated.