Wireless Power Transmission

2021-05-02

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Here i'm going to show how i built a wireless power transmitter / receiver that can power things up to ~2 ft away. The Tx/Rx "coils" are actually single 15" loops of 1/4" copper tubing. The transmitter and receiver are in resonance (just like a Tesla coil), so the maximum amount of power can be transferred. I'm only putting about 40-45 watts of power into my transmitter, so I was very surprised by the results i got.

Technical Specs:

Loop Inductance: 1.05 uH

Resonant Cap value: 3 uF

Resonant Frequency: 89.7 kHz

MOSFET: IRF640 (200V VDS, 1.5V VGS threshold). This FET has a very high R_DS of about 0.2 ohm so they get very warm and they also go into latch-up easily because of the low gate threshold voltage. I don't reccommend this part, and in future builds I'll be replacing this with an IRF250 or IRF260.

Gate Diodes (Also used on rx rectifier): MUR120 (200V / 75 nS recovery time)

LED Board resistors: 330 ohm

Magnet in the electromagnet part of the video is a 40mm x 20mm N52

In the future I plan to make a dramatically larger ZVS driver that can handle around 1,000 watts and power a 4-6 ft transmitter coil to fly a

small drone several feet off the ground, which will be carrying a reciever coil instead of a battery. This type of device is also really useful for transferring power through a barrier, or to a rotating object.

Music used:

Serge Pavkin - Fractal

Serge Pavkin - Tech

Serge Pavkin - Network

https://www.youtube.com/c/SergePavkinMusic