You are correct: But the magnetic flux in the iron "focused" generator is 10 ~100 times bigger than the flux in air. It's a thing called Magnetic permeability. A bit like carbon and clay in a pencil lead can conduct electricity ...,. but copper, aluminium and silver just do it so much better that people use those materials instead. Are the casings aluminium? That is so much better than air - but a long way off the "magnetic soft iron" used commercially.
Look up the numbers for permeability of materials on Wikipedia.
I'll catch-up with you tomorrow.
How much does a set of castings and drawing retail for? Methinks this may be my next project. (maybe with some mods....? I have some old motors and stuff that could donate some "magnetic iron").
K2
Look up the numbers for permeability of materials on Wikipedia.
I'll catch-up with you tomorrow.
How much does a set of castings and drawing retail for? Methinks this may be my next project. (maybe with some mods....? I have some old motors and stuff that could donate some "magnetic iron").
K2