Muller Dynamo

[conradelektro]

@all who observe a speeding up of the rotor when putting a load to a pick up coil or when placing the pickup coil in opposition to the drive coil:

In case you have only one drive coil, the bearings are put under stress, because the rotor is strongly pulled to one side.

If one places a loaded pick up coil in opposition to the drive coil or in other cases somewhere else near the rotor, the stress on the bearings is a bit less (less one sided) and hence the increase of speed.

I observed with my contraption (posted further up in this thread) that it is important to have a "balanced stress" on the rotor/bearings, which can be achieved with a pair-wise arrangement of drive coils and pick up coils (as in Romero's motor-generator). The rotor should not be pulled to one specific side if one wants the bearings to run freely.

I will change my rig accordingly, using a pair of drive coils and a pair of trigger coils. Trigger coils can be further away from the magnets than pick up coils, because the trigger signal does not have to be strong (therefore a pair of trigger coils causes only a small drag in comparison to a pair of loaded pick up coils).

Greetings, Conrad

[e2matrix]

I did some Ansys Maxwell simulations on the biasing mechanism with some pretty interesting results.
The sum of the BEMF forces in tangential direction can be cancelled out completely by adjusting the stator biasing magnets with very high precision. (+/- 0.25 mm !!).
The sweet spot to obtain this point is extremely sensitive. 0.25 mm off and the effect is gone.

It is very important to understand that the exact adjustment is done under a specific load.
If the load is changed after adjustment, you will lose the maximum cancellation of the BEMF forces.
This is what RomeroUK also pointed out.
In practice, if you have succesfully adjusted all bias magnets and start up your replica without any load, obtain a certain RPM and then turn on the load, the RPM should increase.
If you don't obtain this effect, your biasing adjustments are not correct, or you have too large spread in components.

So, what is a handy way of determining the optimum positions for all of the 18 biasing magnets?
In practice, you'll have to start up your rig with the required load and then adjust the bias magnets such that you obtain maximum RPM.

So, I like to emphesize again that in a setup with 8 rotor magnets you can only obtain an optimum when all rotor magnets have same strengths. If the spread is too large it will never work.
This is due to the very critical distance of the bias magnets.
Even the spead in strength of the biasing magnets will count heavily.

A copy of some additional explanation I posted in the experimenters discussion thread earlier:
(see figure below)
If Rotor magnet RM1 is facing the stator coil, the optimum is tuned by Stator magnet SM1.
Then rotor rotates and rotor magnet RM2 faces the same stator coil.
But RM2 has different strength compared to RM1 (0.95T versus 1.05T).
Then the position of SM1 should be tuned again for optimum drag, which will spoil the optimization for RM1.
So only an avarage optimum position can be obtained.
If RM1 would have same value as RM2 than optimization would be perfect.

If you don't pay attention to this, you will never get to the required conditions.

Thanks teslaalset that's important info and I will assume it is why Romero had to add some small weaker magnets on top of some of the stator magnets to get them closer to equal strength. 

[4Tesla]

I was wondering what to use to drill large holes in acrylic.. would this hole saw work?..
http://www.sears.com/shc/s/p_10153_12605_00966287000P?sid=IDx20070921x00003a&ci_src=14110944&ci_sku=00966287000P

Thanks!

[teslaalset]

teslaalset,

great idea. Can you create a new thread under the Muller group (so that I can help moderate, if you want)?  If not, it is ok to still post here with your concepts since this is actually really good to learn and improve our skills besides being very related subject.

Fausto.

I've started the new  discussion thread on (3D) simulations here: http://www.overunity.com/index.php?topic=10841.0

Fausto, yes, it would be great to have some moderation if this one becomes crowded.
You are doing great clean up jobs here

[nul-points]

in the   ROMERO-UK   self-running device,


WOULD WE BE CORRECT IN THINKING THAT THE TWO DRIVE CIRCUITS ARE EFFECTIVELY PROVIDING COIL SHORTING ACTION - OF EACH OTHER - AND WITHIN THEMSELVES?


thanks in advance
np