Phase Locked Loop

[olympios]

I have seen something similar designed by Bob Boyce. He did not disclose the construction of the toroid though due to dangers involved.

[AhuraMazda]

@olympios
Look at Patrick Kelly's D9, page 11.

[angryScientist]

Thanks AhuraMazda

It's still kind of funny to me how all these projects are related. Here's the link to it by the way.
http://pesn.com/2007/09/29/9500450_BobBoyce_Electrolizer_Plans/d9.pdf

I now know where my friend got his numbers from. We'll have to do some in depth sweeps to find out for sure.


Also I found some information that has to do with this type of project. This is much of what I had in mind for the simple fact of the tuning. The information about the Phase locked loop circuit is helpful as well.

4 interacting Tesla coils
http://members.aol.com/alansharp03/Quad.htm


Good info on connecting FETs to a tuned circuit

OK, I do know some things:Use transmission line construction techniques.

Keep ALL connections to FETs SHORT (like less than 1/8 inch) to FET body.

Use RC snubbers on each FET to protect from kickback and parasitics.We had zeners as well.

Cross your fingers.

You can run the FETs at their ratings. It just must be done right. You must stop all ringing and spurs. I have never experienced kickback from the secondary as I have in sparkgap TCs.

The circuit itself is quite involved and was not designed by me. The main problem was FETs blowing up like firecrackers. They require heavy output snubbing and transmission line construction techniques to keep parasitics under control. Not a project for the faint of heart (or budget). Mine was VERY expensive. I would not do it again.

The H-bridge made of 16 FETs fed the primary winding directly with no primary capacitor. This means the system had only one resonant frequency instead of two and made things much much friendlier. The coupling was tight (link type coupling) and the resonant nature of the secondary reflected back into the primary winding presenting a load that is purely resistive (mostly) at resonance. Power regulation was had by slight FMing of the carrier frequency (detuning).

Good luck Zap, Mark

http://members.aol.com/alansharp03/Bartons.htm


Correct me if I'm wrong, the toroid is wound around a core bundle of wire. So the core is like the secondary and we are trying to tune to it. Not to mention add another harmonic or two.

That is a bit simplistic but it hits most most of the main points I understand.

[giantkiller]

That is exactly what I did and the results are phenominal.
A totally configurable core to any shape. That is why I did it and it works.
http://www.overunity.com/index.php/topic,1872.msg21437.html#msg21437


--giantkiller.

[bolt]

No need to worry about PLL at this time as no one has yet seen anything that resembles extra power.  Wait till you get a big bang then quickly write down the frequencies and then worry about PLL later