WIRELESS POWER TRANSMISSION SYSTEM

INTRODUCTION:-The wireless power transmission system discovered by Dr. Nikola tesla in 1891These transmission of electricity from one place to another place without using wire.The conventional energy transfer is using wire.

FUNTION OF THESE SYSTEM :- •Mutual Inductance (M)

▫When current in one inductor induces voltage in a nearby inductor.

•K: Coefficient of Coupling•L1 & L2: Inductance of first & second coil, respectively

•Resonant FrequencyoTo achieve better wireless power transmission, the Power source must be of the same frequency of receiving coil. Power source frequency (F1) = Receiving coil frequency (F2)

F1=F2=  1/(2π√(L2*C2))

TECHNOLOGY :-

▫ FOR SHORT-DISTANCE - •Inductive Coupling

•Resonant inductive coupling

•Air ionization

▫ FOR Long-Distances -•Microwave power transmission

•Laser power transmission

MICROWAVE POWER TRANSMISSION :- Microwave power transmission is called solar power satellite to be build in high earth orbit to collect sun light and convert that energy into microwave, then bemed to very large antenna on earth, the microwave would be converted into conventional electrical power with the hellp of rectenna.

The microwave transmitting devices are classified as Microwave Vacuum Tubes magnetron is mostly used for experimentation of WPT.The microwave transmission often uses 2.45GHz or 5.8GHz band.

The other choices of frequencies are -•8.5 GHz•10 GHz•and 35 GHz

The microwave power transfer technology firstly used in wardenclyffe tower.

It was designed and constructed by nokola tesla mainly for wireless power transmission.The 187 feet tall tower to broadcast energy.

Circuit digram of wardenclyffe tower :-

ADVANTAGE :-•Low maintenance cost.

•More effective when the transmiting and receving points are along a line of sight•Need to grid, substation are eleminated.

•Transmission are easy.

CONCLUSION :-•Batter than conventional wired transfer.•Energy crisis can be decreased.•Low loss.

•More reliable than traditional power.

•In future, world will be comletely wireless.

THANK YOU

Anurag yadav B.E