My Perendev Replication

[Magluvin]

One thing I havnt seen yet with this is the use of what Mylow would call a Permeability plate, which would be an iron ring on the outside of the mags to connect those poles together. Maybe Perendev had that inside his rotor and shell and it could not be seen, if he had a working model.

Mags

[matthew6060]

as far the spinning question:  i wanted to go with bearings but we ended up going with silicone bronze bushings, the idea being that if it won't freely turn with bushings then it won't ever have the torque required to rotate a generator under load.  however if you spin it by hand it will rotate easily, also the rotor probably weighs 20 pounds.

[matthew6060]

also: the bolts and all hardware are stainless.

[Magluvin]

Have you tried any timed rundowns from a set rpm to see if it runs longer in 1 direction or the other?

That will determine if the effect, as you have it, is there at all.

Mags

[matthew6060]

no we have not tried anything like that...  my next step is going to be sourcing pipe or tube with a 0.5in ID so that i can make shields for the magnets.  then i will need to pin the pieces to the table of the cnc using the bolt holes for location and open up all of the magnet pockets to accommodate the new OD of the new shield and magnet combo.  much that i have read strongly suggests that shielding plays a major role in this motor.  i intend to use mild steel with something like a 0.125in wall for a shield.  do you think that the shield could be made open on the top and bottom like a tube or do you think that a shield that cups the magnet with a steel bottom is better?  if i go the cupped route it will require much more screwing around than one that is open on both ends.  also it would be difficult to remove a magnet from a cupped piece of steel.