most simple design of a permanent magnet motor. what are the odds?

[gadgetmall]

Why need for MU metal? From the descriptions in here this type of metal doesn't seem so special at all. If you put a steel plate with certain width on a magnet pole most of the magnetic strength is absorbed as well, and they are much easier to get. You can try it out yourself by putting a thin iron plate in between 2 magnets (same poles facing the plate). Both magnets will clung to the plate, they're just not attracted that strongly.

The Difference is Mu-metal will not magnetize as other metals like Iron and steel . The Down side is a magnet is highly attracted to it . That is why you can connect two like pole magnets  to it even if you have a High or LOW  gauss magnet .The metal ferromagnetic material  does not retain a macroscopic internal field after the removal of an external magnetizing field. I think one could get this wheel to work if there is a way to move the mu-metal OR/AND magnet at a precise time an approaching magnet is near that attraction point.The problem is any pole in the moving  n or s is attracted to Mu-Metal like another unlike pole magnet .either alone or with another magnet stuck to it.You need to find a metal like Bismuth and aluminium to shield the stationary magnets that don't have that property.Otherwise Mu-metal just acts like another magnet to your rotor magnets no matter what pole they are.What is needed is anti-magnet material and it is only been done in superconducting materials and Star Trek Romulans :)Shields Up!Cloak On!

Gadget

[kelloggs]

there is another factor which is important: magnetic saturation. every shielding can only soak up certain amounts of field lines. if its full the rest of the field lines will go through thus creating a weaker magnetic field but thats all we want.... i think. approaching the magnets in a rotor/stator alignment with shielding so that repulsion in counter spinning direction is "weaker" until we reach the point where the magnetic forces push in our desired spinning direction. thats the point where we get rid of the shielding. this should only be a matter of precise geometrical assembly of magnets and mu-metal. getting rid of field lines that would block our spinning and let them go when they push in the right direction. there is no breaking the laws of physics here. it's just harnessing whats already there but whats more important is of course: can we get enough energy from the push to make it through the "weak" magnetic field of the next stator so we get the circular motion and even have energy left to spent it somewhere else.

[ionizer]

No we can't
because whats already there isn't there at all.
You think it's there but that is your own mistake.

[kelloggs]

No we can't
because whats already there isn't there at all.
You think it's there but that is your own mistake.

but then tell me - why do we have to put energy in coils to get the magnetic effect? here we have to do nothing to get the magnetic effect

[ionizer]

No thats not true we have to pull the magnets apart and by doing so we put in as much energy.
You should really get somewhat deeper into magnetic fieldlines and the properties of space to get a more complete picture because you dont understand the invisible part.