Muller Dynamo

[penno64]

Guys,

Check Shorting coil thread


Penno

http://www.overunity.com/index.php?topic=10398.msg289718#msg289718

[toranarod]

It works. 
I was right about my early observations. At last we are moving in the right direction.
I was able to draw 32 m amps from one coil with out any load on the motor.   There was no change in RPM or drive coil load.

Now we start work  ?

just a small point the RPM needs to be right. full speed is not always the correct speed.

I have screen shots to post of the wave forms. 


 

[teslaalset]

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.

[Tudi]

thanks penno64, Maybe double post the info also here ? Some of the guys might not be able to follow every thread on the forum And grouping up the info would be really helpful instead just linking.

[penno64]

Guys,

Now we have seen the effect, who wants to help this dummy (me), understand how to employ this
in the Muller design.

Please


Penno