Rotational PMM by wizkycho

[arktik]

As I told you Igor...I did some tests with the rotational setup and the result ts are verry good.Also did few FEMM simulations just for me to see if the magnetic fied behaves as I think..and looks good.

About the tests I did: taket a rotor with 2 magnets on diametral opposite positions..north out...attached a a spring onto one side and used a sheet of iron as shield.By rotating the shield at a constant distance arround the rotor, the rotor folowed it until the spring allowed him at 1 cm of streching.Now...this was done without outside, opposite magnetic field represented by the stator magnet.
I happened to have a big magnet (25cm OD, 15 cm ID) wich I could use it for a stator.With the same setup as above (I literally moved the above setup inside the big donut magnet,the rotor with the two magnets are moving free, even they are in reppeling mode in respect to de stator ,but when the shield is added, at the same distance to the rotor, and rotated, the spring is streching way much longer than witout the stator, at least 5 times.

I made a great stator now from neos and soon I'll finish the whole setup...I'll take some picturesand a footage when I'll finish.

Best regards,

Cristian

[specter]

Hi!

The link http://starglider.netfirms.com/RPMMonly.html is dead, could anybody decribe what was there? Or maybe someone cuold post any pictures/animations of the setup?

[arktik]

Here are the stator , the shield(input) and the rotor(output) magnet pictures.The dimensions of each one is in such way that the distance betwen the rotor magnet is 5 mm from the shield and from the shield to the stator is 3 mm.So the distance from the rotor magnet and the stator is 9 mm including the thickness of the shield wich is 1mm.Now I have to figure out a way to assemble the whole setup.

Best regards,
Cristian

[specter]

If shield is satturated to maximum it will "REPEL" !?! (bounce) from magnet to the place on magnet where is less satturated and field density is lower. You don't believe this see this very simple experiment I assure You that this is not happening cause of induced current in permeable object.
the experiment: http://www.geocities.com/wizkycho/index_files/magexp.avi

Well, this experiment shows, that "shield" moves to the edge with max flux density, not repels but attracts to it. The edge has higer flux density. It doesn't really matter is shield saturated or not, it will allways move to higher flux density zone. The process is fully identical to that where two magnets attract, think of shield as of magnet polarized in the direction of magnetic induction vector - that is what happens.

[arktik]

not the shield is the one who moves but the magnet rotor...the shield is moved by an external force...the magnetic rotor moves as response, under the atraction of the shield( wich is nothing special) and also under the repulsion of the magnetic field "spike" wich oposes to the rotor in the shield's gap.
cristian