Multi-pole magnetization of a magnet

摘要

A method of magnetizing a multi-pole magnet includes the steps of obtaining a magnetization coil having a magnetization zone and a central axis, and positioning a magnet within the magnetization zone. The method also includes positioning at least one pair of shield bodies including a conductive material proximate the first and second surfaces of the magnet, with the shield bodies being aligned together to cover both sides of at least a first region of magnet and expose both sides of at least a second region of the magnet. The method further includes energizing the magnetization coil to generate an applied magnetic field within the magnetization zone that is sufficient to induce eddy currents in the at least one pair of shield bodies and to magnetize the exposed second region of the magnet.

主权项

1. A method for forming a multi-pole magnet using a magnetization coil that defines a magnetization zone having a central axis, the magnetization coil being configured to generate a magnetic field aligned with the central axis, the method comprising:
for a multi-pole magnetic assembly positioned entirely within the magnetization zone, the multi-pole magnetic assembly comprising:
a magnetic substrate having a first surface and a second surface that is parallel to and opposite the first surface, anda magnetic shield arranged to magnetically isolate a corresponding portion of the magnetic substrate, the magnetic shield comprising a first magnetic shield body at the first surface and a second magnetic shield body at the second surface aligned with the first shield body, wherein the first and second shield bodies are each perpendicular to the common axis; generating the magnetic field by energizing the magnetic coil, wherein the magnetic field induces an eddy current in the first and second shield bodies of sufficient magnitude to create a counter-magnetic field that effectively prevents an alteration of a magnetic property of the magnetically isolated portion of the magnetic substrate.