Magnetizing apparatus for anisotropic permanent magnets

摘要

A device for magnetizing multipolar permanent magnet bodies employs a supporting structure comprising a series of superimposed sheets of electrically insulating material, which may be of fiberglass, with prepared apertures to receive an electrically conductive magnetizing winding; the apertures may be arranged to firmly support the winding to prevent displacement despite the strong magnetic fields generated by a high current impulse discharge, and the winding can be arranged to produce a variety of polar patterns, by providing a suitable opening in the supporting structure on cylindrical magnets. The supporting structure includes at least one plate having a plurality of magnetic poles disposed about the inner perimeter of its aperture. This plate permits alignment of a previously magnetized body, that is not presently magnetized but which has magnetic domains therein in a pattern corresponding to its previous magnetization, with the magnetic poles of the apparatus such that efficient re-magnetization occurs corresponding to the preferred direction of magnetization of the body.