Rotational PMM by wizkycho

[wizkycho]

Ok. If there really is a zero point and you can adjust the inner magnets to head it, the machine would do what is should.
Still i believe, the zero point is right to far away from the shield so the repell force of the outer magnets are quite to less to provide extra power while rotating.
I think we'll have to test it practically. I dont't know, i believe we are missing something here...

-- Andi

I 99% think that Sillicon Iron, very easy to find and it is used for transformer cores it has permeability 7000 and high satturation, would do and position of zero point can even enter into shield itself.

I will soon make some shield tests and see if rotor magnet can get close enough.

[ooandioo]

@wizkycho
I did some tests with simple stainless steel and strong magnets. Perhaps you are right. If you find a good point for the inner magnet to the shield, the attractions of the shield is less than the repulsion to the outer magnet...but its only a feeling. Would like to have good technique in order to measure N.

@m668004
How will you carry the outer ring magnet if the shield is closed at all sides? If you stay with U-form its working. Your idea of putting the "inner magnets" on the top is easier to build and to adjust.

-- Andi

[m668004]

@ooandioo

@m668004
How will you carry the outer ring magnet if the shield is closed at all sides? If you stay with U-form its working.

I'm sorry. I simply didn't realize that. I have corrected the picture.

M.

[wizkycho]

@wizkycho and all

To allow an easy to build device I changed the design a little bit. Please look at the picture. Only 3 magnets would be needed. 1 ringmagnet as stator and 2 diskmagnets as output-rotor. The picture is only a scheme. In my opinion this design would work too if the working principle is valid. What do you think?

M.

to properly block repel force with the as thinner shield possible shield must cover the area where the south is strongest.

[wizkycho]

@wizkycho and all

To allow an easy to build device I changed the design a little bit. Please look at the picture. Only 3 magnets would be needed. 1 ringmagnet as stator and 2 diskmagnets as output-rotor. The picture is only a scheme. In my opinion this design would work too if the working principle is valid. What do you think?

M.

I Thought twice... As You can see there are two types (for now) as how shield can be applied.
"wrong type" maybe is not that wrong because main north field is separated in left and right filed which are two times weaker than together so looking like that shield can be thinner (and not to get satturated 100%), but then again some of the North repel field will escape scince strongest area of South pole is not covered with shield, making repel action stronger

really it needs some magnets, 0.5mm Iron-Si plates... little bending of sheets and I think in two hours we can conclude which type of shield deserves our attention.

Your design looks simpler to build (I give it complexity of design 20%) so lets proceeed. Now the only custom type magnet is the ring magnet.
any idea where we can find one cheap ? i would like one 20cm diameter with 2cm magnet width and 1 cm magnet height NdFeB of course.