Patent ID: 7498915
Filing Date: 2009-03-03
Classification: H01F

Abstract:
1. A fixed remanence rigid permanent superconductive magnet structure, comprising; a plurality of superconductive particles, having a given transition temperature of about 100° K. and a predetermined magnetic flux density, are exposed to an external magnetic field; said external magnetic field generates an increased magnetic flux density within said plurality of superconductive particles; said plurality of superconductive particles being aligned and shaped into a plurality of superconductive magnetic segments, each of said plurality of superconductive magnetic segments having an axis of flux-trapping, a high capacity for trapping magnetic flux, and said increased magnetic flux density, said increased magnetic flux density having a magnetic remanence greater than said predetermined magnetic flux density; a means for cooling cools said plurality of superconductive magnetic segments to a sub-transition temperature lower than said given transition temperature and traps said increased magnetic flux density within each of said plurality of superconductive segments to provide a plurality of cooled superconductive magnetic segments; said sub-transition temperature being maintained; and said plurality of cooled superconductive magnetic segments, each having a constant magnetic remanence, B, being assembled into said superconductive magnet structure, generate an overall unidirectional magnetization direction, M, and a fixed magnetic remanence, {right arrow over (B)}, in an interior working space defined by said superconductive magnet structure.