Witricity, standing for wireless electricity, is a term used to describe the ability to provide electricity to remote objects without wires. Witricity is nothing but wireless electricity used to transmit electrical energy from one object to another without using wires. due to witricity some device will not require batteries to operate.WiTricity is based on strong coupling between electromagnetic resonant objects .This differs from other methods like simple induction, microwaves, or air ionization.
Basic principle:
Consider two self resonating copper coils of same resonating frequency with a diameter 20 inches each. One copper wire is connected to the power source (WiTricity transmitter), while the other copper wire is connected to the device (WiTricity Receiver). The electric power from the power source causes the copper coil connected to it to start oscillating at a particular (MHz) frequency. Subsequently, the space around the copper coil gets filled with non-magnetic radiations. This generated magnetic field further transfers the power to the other copper coil connected to the receiver. Since this coil is also of the same frequency, it starts oscillating at the same frequency as the first coil. This is known as ‘coupled resonance’ and is the principle behind WiTricity.
The system consists of transmitters and receivers having magnetic loop antennas tuned to same frequency.The receiving devices must be no more than about a quarter wavelength from the transmitter .During normal operation, an antenna emits electromagnetic fields into the surrounding nearfield region, then a portion of the field energy decays since it is re-absorbed by the antenna, while the remainder is radiated into the environment as EM waves.Non-radiative wireless power would have limited range, and the range would be shorter for smaller-size receivers .
It has been more than 100 years since this technology was initially discovered. witricity is not a new concept. it is safe and sound for human beings as well. We need it badly because of its plenty of merits.This could be useful to power consumer and industrial electronics like cell phones, laptops, etc
