FLUX FOCUSING ARRANGEMENT FOR PERMANENT MAGNETS, METHODS OF FABRICATING SUCH ARRANGEMENTS, AND MACHINES INCLUDING SUCH ARRANGEMENTS

摘要

Numerous arrangements for permanent magnets are disclosed that can focus the flux produced by the magnets. Depending on the particular application in which the disclosed designs and techniques are used, efficiency and reliability may be increased by minimizing flux leakage, increasing peak flux density, and shaping the flux fields to improve the effective coercivity of the flux focusing permanent magnet arrangement when loaded, and to achieve customized voltage and current waveforms. The disclosed magnet assemblies may be incorporated into a machine, such as a motor/generator, having windings and may be disposed for movement relative to the windings. The magnet assembly may be mounted on a support formed of one or more ferromagnetic materials, such as a back iron. The disclosed flux focusing magnet assemblies may be formed using a variety of manufacturing methods.

主权项

1. An apparatus comprising:
a magnet having: a central magnetic region; and a first side magnetic region disposed on a first side of the central magnetic region; and a second side magnetic region disposed on the opposite side of the central region, the magnet regions collectively forming a permanent magnet producing a magnetic field with a magnetic angle of polarization relative to a top surface of the magnet that increases from the center to the first side, and decreases from the center to the second side, the magnetic angles of polarization not intersecting at a point above the top surface.