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I tried to buil it and it worked just for a LED as load ... but in next time I tried it dosen't work ( in this case the power supply gives 1.5 A ... which mean that the transmitter is OK -as I think )
However I have some quastions about the theory.. How It works!! I mean How current flow?? how feedback achived by Diods?? I tried to make DC or Ac analysis but I faild !! can any one help me in this?? last quastion.. RFC why they are used??
Registered Member #4267
Joined: Fri Dec 16 2011, 09:17AM
Location:
Posts: 16
Hi, im very interested in this topic. Is there any way marko, or some one who has done a similar project could post there Final Circuit and component list?
Hi everyone. I have been following this thread for quite some time now. I am writing a report on inductive wireless power transfer as my design part is already completed. I wanted to know:
What is the significance of the royer oscillator since the LC tank itself is an oscillator?
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
An LC tank alone is not an oscillator... It won't continue forever, as there's resistance in wires (not a lot, but enough) to kill of anything that may start.
The purpose of the royer is to keep the oscillations going even with the resistance by giving it positive gain to overcome the resistance effects.
Also, Marko, I've thought about it a little, and a one turn primary is bound to draw a lot of current, as there is very little impedance in your tank circuit. I've found that by adding more turns, you greatly decrease your current draw, and thus greatly decrease heating.
It's great if you want to make smaller versions of this circuit!
An LC tank alone is not an oscillator... It won't continue forever, as there's resistance in wires (not a lot, but enough) to kill of anything that may start.
The purpose of the royer is to keep the oscillations going even with the resistance by giving it positive gain to overcome the resistance effects.
Also, Marko, I've thought about it a little, and a one turn primary is bound to draw a lot of current, as there is very little impedance in your tank circuit. I've found that by adding more turns, you greatly decrease your current draw, and thus greatly decrease heating.
It's great if you want to make smaller versions of this circuit!
Thanks for the reply. And about adding more turns, apart from current and heating, would that affect any other thing?
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Miniature wireless power demonstrator
