I wanna make an electromagnet to rapidly switch polarity back and forth. I hear the core should be made of laminated iron to avoid heat losses; is this correct? Where could I get one such core from, and is there anything else I should consider?
In a circuit with inductance, current exhibits a reluctance to undergo any rapid changes. The more rapidly you try to make it change, the more stubborn it becomes.Eddy currents and heat losses? Is there anything else?