The Perendev has movement, because the magnets on the rotor are sealed with steel. This technique makes the magnet stronger where it isn't sealed: top and bottom, but makes the magnetic fields (flux) closer. They isolate the magnetic field around the magnets.
The steel will not get attracted to the stators because the magnets on the stators are probably also sealed but the magnetic force between top of magnets (not sealed) on the rotor and those of the stators is the strongest and that is why the simulation on this site doesn't work.
This way of isolating magnets is very known: look at pot magnets! The steel is a better guider of magnetism than the air and that is why the magnetic flux chooses to travel through the steel and you are cutting the field short!
There is contact between the steel (=external shell) and the magnets. Steel gets magnetized (attracted), it is a way of isolating that is frequently used with pot magnets. Every magnet dealer sells them!
If the Perendev motor works, then it has to be with that kind of isolation;
otherwise the repelling power is equal to the attracting power on the sides of the magnets!
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