Iron powder and epoxy?

R3KR

Any have good results by mixing iron powder and epoxy, purpose is to create an armature for a generator.

Bob S

I think you want high permeability of the magnetic circuit including both armature and stator. Typical permeability (I think) of iron powder and epoxy is ~ 100 or 150, while steel laminations are ~ 4000. In rotating machinery, one of the limitations is the low permeability of the gap (=1) between armature and stator.
Bob S

R3KR

Thanks for your answer.

Steel Laminations ?
What is that ?

Bob S

Most generator and alternator armatures (except permanent magnet rotors on brushless dynamos) have steel laminations ~ 0.4 mm thick in the armature to reduce ac eddy currents in the steel.
Bob S