How Do You Imagine You Can Increase the Magnetic Field From a Magnet?
You lot need to call back almost the path of the magnetic field. The field is non something that flows like an current is electrons flowing through a conductor, but it is convenient to picture it that way. The magnetic field flows in a closed path through the center of the coil, out 1 end and and around the outside of the scroll the the other end. The field flows near easily through atomic number 26, but if there is no iron, in the path, it volition flow through the air to reach the other end of the ringlet. It will take the path that has the minimum distance through air. The shape of the microwave oven transformer (MOT) core tends to keep the magnetic flux shut to the core. If the core was a straight bar, the flux would tend to reach out further. As well the force on some other slice of fe increases as the iron moves closer to closing the air gap. Hither is a diagram that shows the magnetic flux in ruby.
If you are energizing the magnet with AC, information technology might be a practiced idea to try DC. Y'all might consider winding a new secondary winding with larger wire and connecting the secondary to a high-current rectifier to provide low voltage DC the style MOTs are used to make welders and bound-starting ability supplies. The DC supply could and then supply high current to a bar-shaped electromagnet. With DC, you lot wouldn't demand laminated transformer steel, but would need a thick bar, at least equally thick as the MOT cadre. It might be more convenient to build it upwardly from smaller flat bars.
You lot should probably study diverse descriptions of MOT electromagnet and other projects that yous can observe on the internet. Details are different among the various projects, so you might discover a dissimilar way of doing things that is more suitable for the outcome that you desire. Too expect for cloth to study about electromagnets in full general.
Source: https://electronics.stackexchange.com/questions/224660/how-to-increase-an-electromagnets-magnetic-field-size
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