Muller Dynamo

[highrollerscorp]

cool video i just replicated a circuit kinda of like what remero has but i just used a trigger coil with kind of a bedini set up. it works good speeds right back up when i find that right spot.your video amazed me though cause u had no circuit when u were shorting out the small red coil. this is the first day ive looked into this and i think its awsome. so one of u guys said somethin about the right capacitor being needed to catch half wave stuff. how would u pick what size a capcitor to use. would u kind of be looking for resonance or something?

[kEhYo77]

Hi highrollerscorp
Here is a quote from Romero about this circuit and a value of the capacitor:

The circuit does a bit more... it can be replaced even with a simple bedini circuit and the right value capacitor, very simple..

Add a capacitor 220-470uf/16v from plus to the minus, no battery required.This capacitor will self charge then discharge cousing acceleration, half cycle charge the other discharge, actually is a bit more that half cycle charge.  Because the magnet is attracted to the core freely that part requires no power but we endup with charge in the capacitor. That charge is enough to push the magnet away and accelerate. With more of them properly set you can have a self runner.
This is the easy option, without having a proper coil made.
Must work, I have tested it in many  toys.

[konehead]

hi Kehyo

That 2nd quote is very good -

I have question about it - he says to put capacitor 220uf-470uf 16V "from plus to the minus" and this capacitor will self-charge and discharge, giving the rotor some acceleration.


When he says "plus to minus" this to me, means its a "series capacitor" but maybe its not and its paralell across the coil or the mosfet?

Also I assume this capacitor is a DC type (polarized) but maybe for some reaons it is AC type  - it does show an AC type in the romero drive circuit drawing....

So is the 100uf cap in the Romero drive circuit drawing doing what he describes here?

And could you say that 100uf capacitor is hooked "plus to minus" or is this quote about a different circuit than romero's motor/drive coil circuit with the 100uf cap in it?

[konehead]

hmmmm
looking at the romero drive coil circuit again, does it work so that it needs no 15VDC "power supply" for the transistor or mosfet as you would normally do, and normally also having a driver-chip in the circuit too that also needs a power supply?

And that 100uf capacitor being charged -  this IS the power supply for the transistor/mosfet to be feeding the gate/base???

Is this what Romero means by "needs no batteries?" in that quote?

So, the magnet-sweep past the coil charges the 100uf cap.

The 100uf cap works as thebase/gate power supply to swtich the transistor/mosfet ON
and when the 100uf cap drops down in voltage upon discharge, it turns OFF the transistor mosfet.
This is why the size of cap is so important?
So that the cap has enough juice in it to turn ON the transistor/mosfet, and the juice drops just enough upon discharge to turn OFF the transistor/mosfet at just the right time....

so seems like the duty cyle of the pulse could be adjusted through the cap's uf value???

AND, this 100uf cap has another purpose, as it also feeds current to the generator coils, in a pulse, at just the right time to accelerate the rotor by making the generator coil work as a motor-coil...

and if the cap is feeding the generator coil, and not jsut supply the dc voltage to the gate/base....then the uf value of the capacitor must be adjusted for this dual purpose...

do I have this right??

mabye all Romero did to make a looper is have his motor coil circuit with the hall effects induced by the ROTOR magnets run through the generator coils???

And the generator coils fill up that very large DC cap in a "pulsed-mode", controlled by the timing of the motor-coil circuit induced by rotor magnets???

[kEhYo77]

Hi konehead

The circuit is exactly the same as in the picture in my previous post. It is the same as the original driving circuit, I just removed the battery.
The capacitor is a DC electrolytic type hence + and - in the quote from Romero (referring to the battery terminals). The cap value must be selected to get several volts, around 5 to 15V maybe, just from the magnet attraction to the core so that the hall sensor works correctly and the PNP transistor opens.
So 100uf cap from the pic is the one to be experimentally selected depending on your setup and the RPM.

I also think that in his case he was using generator coils in this fashion as to pulse-charge the big cap.. seems logical and simple.