How to Make Wireless Power Transmission (at an Amazing 90 Cm Distance)

Introduction: How to Make Wireless Power Transmission (at an Amazing 90 Cm Distance)

Wireless power transfer (WPT), wireless power transmission, wireless energy transmission (WET), or electromagnetic power transfer is the transmission of electrical energy without wires as a physical link.

Step 1: Description

In a wireless power transmission system, a transmitter device, driven by electric power from a power source, generates a time-varying electromagnetic field, which transmits power across space to a receiver device, which extracts power from the field and supplies it to an electrical load.

Project presented ov video is Wireless Power Transfer between two coupled parallel LC tuned circuits, each consisting of a copper conductor loop acting as an inductor and a capacitor. Both LC circuits are tuned to equal individual resonant frequencies.

Step 2: Building I Schematics

Basically this is a ZVS driver circuit. I used SW3205 Mosfet, but you can use other power Mosfet such as IRF540 or IRFZ44. Transmitter loop is a copper pipe of 1cm in size. Its diameter is 18cm.

I did this kind of experiment 3 years ago and made a 40 cm distance transfer. More precisely at such a distance I managed to activate 10 watts LED diode without using wires. This time, by fine tuning the LC circuits and by entering Passive tank circuits (passive LC - oscillators) , I managed to activate 10W LED diode at a distance of a amazing 75cm. And even more, a regular LED diode is activated at a distance of 90-100 cm. Device is powered by 12 volts DC and draw about 3A , total 36W. Scematics are presented at the end of the video, and you can also download them at the links below.

Schematics :


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    10 months ago

    I do like this, but I have a few things to say about it. First off, all wireless transmission is not energy efficient, so theres that. Secondly, using only a singular loop wastes a lot of energy, so try experimenting with multiple loops on both coils.


    11 months ago

    Interesting, the connections from drain to loop look like giving a less efficient but identical effect of a piece of coaxial cable .Try running centre lead of cable one drain to one side of loop and shield to other drain and other side of loop. The capacitance in the cable will stay the same however long you make it..

    What happens if you insert a loop in between the transmitter loop and the receiver loop.? I would expect it would not go as far .
    What happens if you insert 2 more loops ? You should get a yagi effect increasing the power out. use 3 5 7 9 etc for continual increase and keep spacing at about a quarter of the loop circumference.

    Then what happens if you gradually reduce the circumference of the loops working from the transmitter loop? Tadahhh ! Well then what do you have then?