Witricity

Witricity:Transferring electric energy or power

over distance without wire.

This works mainly due to induction principle but at resonant frequency maximum of the power is transferred.

The coil parameters are to be designed in such a way that when they are operated at resonant frequency maximum of power is transferred.

Inductance of the coil can be calculated by the formulae

Radius in inches Length in inches Inductance in micro henry

Capacitance of the coil can be found by using

C = [0.1126(ℓ/D) + 0.08 + 0.27√(D/ℓ )] D

Capacitance in pico-farads

L- length in cm

D-diameter in cm

Note: parameters can be calculated by using LCR meter.

Resonant frequency is found by