Using core/barrel to reduce leakage flux

[Dymitr Nawrocki]

In case of transformers, shell type cores(in the picture the one on top) generally can be used with higher power because they have less leakage flux than core type transformers, i was wondering if using core in coilgun could reduce leakage flux and possibly increase magnetic saturation of the armature. I know that electromagnets with core make huge difference compared to just only coil, might be a good idea to try to use core to focus magnetic field where it's needed.

[arcflash_admin]

Yes, using an external iron/ferrite shell would reduce flux leakage but it is impractical from a manufacturing standpoint.