Recent content by Coster

@ moderator : this thread can be closed. I examined my problem and I have found that it isn't feasible. But anyway : thanks to everyone that has replied!

thx for your replies! I know the dimension aren't related linear with the strengt, but I need really both : big magnetic contact area and a big attraction field. I need 2 N/mm^2 (145 pounds force / sq.inch ) at a few mm (+/- 0.1inches) of the magnetic area. If I will make this magnetic...

thx for your reply. The fact that I was asking this question on this forum is because I can't affort to use the trial and error method as I will build a large electromagnet. The dimensions should go up to a cross-section of 40*40 cm^2 (15.75 *15.75 inches^2) or even up to 100*100 cm^2...

Hi, I like to research the possibility to build an electromagnet that is quit big and has a lot of strength. As I really don't know much about magnetism, I don't see how to start with this. Anyone that please can help me with some formulas? I like to make a sort of excel or MATLAB...