Muller Dynamo

[konehead]

hi all

A very smart guy named "RS" who doesnt like to post on forums himself sent me this info in my email about the core-flipping thing.
He really seems to know what is going on and is very advanced - anyways here is his email to me copied below, and also he drew a diagram underneath chamalad's illustration to explain what he is talking about better.

I dont really get what he is saying right now will have read it a few times and think about if for a day - if anyone wants to translate/explain simple what he is saying that would be good:

"Kone,

chalamadad  posted this BH curve pic,  but he does not have it quite right..............

The Knee of the B/H curve,  real close to saturation,  the Non Linear region  is what they want to tweek the bias magnets strength and distance,  to bias's the core to.   
So that the cores can just make the Polarity flip flop back and forth between stable points before the Knee,  and after the Knee,  between non saturation in one polarity, and  full saturation in the other polarity, Very  Very Fast,  with a certain rotor magnet strength / gap, etc,  to modulate the flip flop between those 2 Polarity's points on the core's BH curve....

This is kind of like a Mag Amp, using magnets to do the BH bias, vs  DC coils on the core to do the BH bias

Very Very Fast Polarity Flipping,  makes for Higher Voltages output too"

[chalamadad]

hi all

A very smart guy named "RS" who doesnt like to post on forums himself sent me this info in my email about the core-flipping thing.
He really seems to know what is going on and is very advanced - anyways here is his email to me copied below, and also he drew a diagram underneath chamalad's illustration to explain what he is talking about better.

I dont really get what he is saying right now will have read it a few times and think about if for a day - if anyone wants to translate/explain simple what he is saying that would be good:

"Kone,

chalamadad  posted this BH curve pic,  but he does not have it quite right..............

The Knee of the B/H curve,  real close to saturation,  the Non Linear region  is what they want to tweek the bias magnets strength and distance,  to bias's the core to.   
So that the cores can just make the Polarity flip flop back and forth between stable points before the Knee,  and after the Knee,  between non saturation in one polarity, and  full saturation in the other polarity, Very  Very Fast,  with a certain rotor magnet strength / gap, etc,  to modulate the flip flop between those 2 Polarity's points on the core's BH curve....

This is kind of like a Mag Amp, using magnets to do the BH bias, vs  DC coils on the core to do the BH bias

Very Very Fast Polarity Flipping,  makes for Higher Voltages output too"

I agree the BH curve might not be 100% exact about at what specific point the reversal is taking place. This is Romero's graph he maybe copied it from somewhere just to get the idea I guess. But to reach saturation the right limit must go even more to the right. Even more as in your sketch. You have to cross the saturation level. This is above the asymptotical top-right.

Then flux density goes down to zero, magnet escapes, core saturation is below saturation again, that means there is flux again, until next magnet is approaching again and saturation occurs again and so on.

I think high voltages occur with the fast switching on/off of magnetic flux generating displacement current.

BH curve is not about polarity. Just about saturation, field strength and flux density. Think about it - if rotor magnet is in attraction is pulled to core at this moment saturation and what we then need is a flip from pull to push. Where should the push come from? Rotor magnet polarizes core to attraction and stator magnets the guys experienced must be in attraction to the rotor magnet. So they are same polarity. In the moment the saturation is lost, the stronger magnets "wins" about the polarity of the core. But how can they flip if they don't oppose? This is controversal. Can you ask "RS" (that's not Romero himself, is it? ) to please draw some sketches what exactly happens each step when the rotor magnet is passing by?

@all who experienced speed up, can you confirm the stator magnets being in attraction to rotor magnets?

On the other hand side - Romero's image shows the rotor and the stator magnets opposing indeed.

[chalamadad]

This should be how it is:

[xenomorphlabs]

@all who experienced speed up, can you confirm the stator magnets being in attraction to rotor magnets?

In my case it was repulsion, strangely
Attraction slowed the rotor even more down.
Plengo reported that sometimes attraction, sometimes repulsion helped.
The magnetic fields around these things must be OBM (ONE BIG MESS)
so that sometimes a different polarity dominates.

Hysteresis:
We have to keep in mind that the magnet highly skews the hysteresis curve and actually brings together magnetisation and demagnetisation path pretty much on top of each other. (see pic of Naudin experiment)
What does this tell us about the core's remanence? I have to ponder about this more.
At least it seems that the saturation threshold is extremely lowered, so that the core is easily saturated by the passing magnet.
It might be a correct interpretation to have the core just outside of saturation when the rotor magnet is far away by lowering the threshold with the biasing magnet, pushing the operation area into the non-linear region.

Interesting links: http://www.vias.org/matsch_capmag/matsch_caps_magnetics_chap4_08b.html

[chalamadad]

It might be a correct interpretation to have the core just outside of saturation when the rotor magnet is far away by lowering the threshold with the biasing magnet, pushing the operation area into the non-linear region.

We want two things:

1. At specific timing zero flux for ambient energy extraction (per diplacement current). This is actually WHEN extraction can occur. If we don't have the situation of zero flux, you can have a beer with Mr. Lenz again.
2. Biggest possible CHANGE of flux. That is the delta from just below saturation to zero. This will decide the AMOUNT of energy that can be extracted. This change is achieved most quickly by saturating the core. And we need that happening quickly.

In what direction the change occurs is probably not important. So you can have the situation of having a saturated core and the rotor brings it close below saturation or the other way around, having an almost saturated core that is being driven to saturation by the rotor magnet. Important is the biggest possible oscillation of magnetic flux.