Original poster: Steve Conner <steve@xxxxxxxxxxxx>
Just a possible application for gapped ferromagnetic
inductors... A pole face rotor (DC field) from a large
alternator
Hey, good idea Harvey :))) Any induction motor should work as a ballast
inductor since they already have air gaps in their magnetic circuit. They
can be got cheap from scrap yards so it might be worth trying. If you're
feeling really ingenious I guess you could grind flats on the rotor and
adjust the inductance by turning it. You would have to lock it since it
would want to spin. Or maybe it would be better to take the rotor out
altogether?
Just a thought. Mind you I think something similar was mentioned in that
Christmas Magnifier story that used to do the rounds. It was a joke but
maybe not as stupid as it seems :P