Muller Dynamo

[yssuraxu_697]

Hi there is nice pictures!
What computer program you are used to get it?

Hehe, nice - not useful - yes. It is ViziMag. Good tool for 1-minute concept checks - very easy to use.

[khabe]

Ferrite discs on both sides of the former will act as shields to external magnetic fields parallel to axis.

Glad to see that there is at least one person understanding about magnetism

But there is second magnet on the top side, you need to reckon with as well,

When someone speaks about saturation then ... look at huge air gap between coil and  10...12 mm thick magnet - about what kind of saturation we are speaking?

cheers,
khabe

[hoptoad]

snip ... these is no battery in the circuit so why bother charging a battery?

snip...

Charging the battery is an incidental bonus. The circuit as shown produces a unidirectional current through the coils from their own collapsing field which extends the duration of the applied power pulse within them.

Provided the duration of the extended pulse does not exceed 50 % duty cycle, this will cause an increase in rotor speed and torque, thus giving rise to the expectation of an even greater gen coil output.

If the drive coils are very low impedance, the battery does not need to be in the feedback circuit, and the diodes can connect directly to the positive rail, resulting in a beneficial effect on rotor torque.

If, however the coils have too much impedance, the battery's capacitance properties, in the feedback collector circuit, ensures that the timing constant of the whole feedback circuit is low, and wont cause the extended applied power (as opposed to supplied) to the coils to exceed 50 % duty cycle.

Impedance and duty cycle play a great role in whether the feedback circuit is a benefit or a constraint to rotor torque and speed.

Cheers

[hoptoad]

hi Hoptoad

if Romero hasn't already tried this but doesn't wish to, i'm intending to include feedback of coil-collapse energy in my build attempt, although in my case i'm planning to feedback to the buffer cap - so you should get a report back from someone 

cheers
np

http://docsfreelunch.blogspot.com

Great.  Curious as always.   

Cheers

[yssuraxu_697]

But there is second magnet on the top side, you need to reckon with as well,

And that magnet is actually somewhat shielded by metal washer. Rendered sketch to show entire picture as I understand it.

about what kind of saturation we are speaking?

Eventually would be nice to make airgap smaller. I'm not going for exact replica, so my mistake - was thinking rather of my own project.

PS. Besides washer there are eddys running around in the magnets coatings, which are btw highly conductive It almost seems like conspiracy, strongest magnets are provided with conducting coating to degrade their performance in dynamic systems