Muller Dynamo

[gyulasun]

Hi Richard,

Thanks for the explanation on the coil.  My question is when you finish the first Layer on the right hand side of the core you simply guide back the wire on the very top of the first layer and start the second Layer from the left side again, working towards the right hand side and so on and so on?  (so any new layer always starts from the left hand side of the core)
And this same valid in case you make the bifilar version of such coil construction, right?
What self inductance do you have for such coils and DC resistance if you don't mind telling.
In case of a bifilar version, you connect the two wires in series or you just use one coil for driving and the other coil from the coil pair for collecting the emf from the collapsing flux?

Thanks,  Gyula

[chalamadad]

Quick update: Soft ferrite cores arrived today. With biasing magnets on one coilpair speed increased significantly (up to over 200 rpm). Didn't get a speedup like this with every coilpair. Overall speed was lower though as with the core magnets but this might be because the air gap is bigger now. Cores protruding the coil a little.
Had the coils in bucking config but voltage output was quite low (<3V). Having a resistor as load, ampmeter showed 200mA, rotor wasn't slowing down much.

[mondrasek]

@chalamadad, very interesting.  So far every time I introduce backing mags I get an RPM slow down.  But there is also a Pout increase for awhile.

Please let me know the details of your ferrite.  I wonder if I am waaay out of range on the permeability or if my gap is not in the correct range to attempt any tuning right now.

Edited to add:  Wait a minute.  I forgot:  If I brought the backing magnets in too close to the ferrite cores I would still see an RPM drop and Vout increase.  But Pout (now including current) would DROP dramtically.

Please let me know what you are able to measure as far as Pin vs. Pout vs. RPM, etc.

Thanks in advance.

M.

[FreeEnergyInfo]

Had time on my hands so it's up now.

http://www.youtube.com/watch?v=yGTfGFtcRiM

Keep in mind that the Muller coil is using one wire in making up the total coil.

I forgot to mention in the video that his design make the smallest of area coil possible, allowing more coils to be use as pickups.

Richard

HHOforVOLTS

thanks...
http://www.youtube.com/watch?v=70E0Q_pCB-4

[rfmmars]

Hi Richard,

Thanks for the explanation on the coil.  My question is when you finish the first Layer on the right hand side of the core you simply guide back the wire on the very top of the first layer and start the second Layer from the left side again, working towards the right hand side and so on and so on?  (so any new layer always starts from the left hand side of the core)
And this same valid in case you make the bifilar version of such coil construction, right?
What self inductance do you have for such coils and DC resistance if you don't mind telling.
In case of a bifilar version, you connect the two wires in series or you just use one coil for driving and the other coil from the coil pair for collecting the emf from the collapsing flux?

Thanks,  Gyula

I would start winding the first layer from the front to the back then the next two layers from the back to front stopping each time 1/3 from the start of the first layer. Then to the back and wind 4 layers stopping 2/3 from the start of the first winding, you may come up with a better plan.

On any coil using a bifiler, trifiler, etc setup, if you connect in series the next winding, the inductance is multiplied anywhere from 3 to 6 times depending on coil design. In our case, the first wind with ferrite core had an inductance of 1.9 uh. When all winding put in series, the inductance end up at 126 uh, thats a 66.3:1 . If the magnets passed both ends at the same time, the inductance dropped to 18 uh. The placement in series of the first series winding will has the biggest increase, but there is no gauge to go by in this matter.

Richard