WIRELESS POWER TRANSFER

 

Wireless Energy Transfer or Wireless Power is the transmission of electrical energy from a power source to an electrical load without interconnecting man made conductors.  Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous, or impossible.  The problem of wireless power transmission differs from that of wireless telecommunications, such as radio.  In the latter, the proportion of energy received becomes critical only if it is too low for the signal to be distinguished from the background noise. With wireless power, efficiency is the more significant parameter.  A large part of the energy sent out by the generating plant must arrive at the receiver or receivers to make the system economical.
- Wikipedia.

I hate to go into the theory because i am kind of a  practical person..who scores much better in practicals rather than writing mindless theory papers judged by some bookworms who wouldn't try to question any standards, as if they even qualified to be labelled as standards..Indian education system boss..it can make an elephant chirp and a bird roar..okay so lets cut the crap and start making a wireless power transfer system.


A bit of theory just to brush up your basics :

So, basically wireless power transfer is nothing more than a transformer without a core..without a core so without a channel..without a channel so less energy concentration and more loss..more loss, well.. less output..less output ...useless.

Just So You Were Wondering, This Is A Transformer

And This Is A Transformer From  Cybertron

So Nikola Tesla, a great scientist told the world that in resonance the system is optimized and maximum efficiency is achieved at near distances..near he said, and still managed to light a bulb almost a mile away!!

Now i ain't Tesla, so near for me is actually near. Well, today we will try to light white leds at a distance of 8-10 cms away from the transmitter.


Prerequisites :

1. 4.5V / 5V Batteries.
2. Capacitors  (Polypropylene)
                    a. C1 - 1nF
                    b. C3,C5 - 4,7 nf
                    c. C4,C6 - 220nf
3. 19 SWG Enameled Wire.
4. White Leds, Red Leds.
5. Bread Board.
6. Connecting Wires.
7. Electric Tape.
8. Digital Multimeter.
9. Diode D1 - BAT46 (i used this), 1N4148.
10. Transistor T1 - BD137, BD139 (i used this), BD639.
11. Resistor R1 - 5.1k 

Schematics:

Transmitter, The Three Ends Are Left Out For The Coils

                            Receiver, Connect The Coils To The Ends Shown                             

Coils:

So Now You Get A Good Idea On How Many Turns And What Thickness

No. of Turns : 4 on each (2 + 2) 

Check Out This Video : Wireless Power Transfer Demonstration

 

Well, That's It. There You Have A Working Prototype of Wireless Power Transfer System Using Inductive Coupling. I will Try To Upload My Own Detailed Video Where I Make Everything From Scratch..And Tackle The Difficulties I face In The Way..Till Then Ciao!!