SYSTEM FOR CONCENTRATING MAGNETIC FLUX OF A MULTI-POLE MAGNETIC STRUCTURE

摘要

An improved system for concentrating magnetic flux of a multi-pole magnetic structure at the surface of a ferromagnetic target uses pole pieces having a magnet-to-pole piece interface with a first area and a pole piece-to-target interface with a second area substantially smaller than the first area, where the target can be a ferromagnetic material or a complementary pole pieces. The multi-pole magnetic structure can be a coded magnetic structure or an alternating polarity structure comprising two polarity directions, or can be a hybrid structure comprising more than two polarity directions. A magnetic structure can be made up of discrete magnets or can be a printed magnetic structure.

主权项

1. A system for concentrating magnetic flux, comprising:
a multi-pole magnetic structure comprising one or more pieces of a magnetizable material having a plurality of polarity regions for providing a magnetic flux, said magnetizable material having a first saturation flux density, said plurality of polarity regions being magnetized in a plurality of magnetization directions; and a plurality of pole pieces of a ferromagnetic material for integrating said magnetic flux across said plurality of polarity regions and directing said magnetic flux at right angles to at least one target, said ferromagnetic material having a second saturation flux density, each pole piece of said plurality of pole pieces having a magnet-to-pole piece interface with a corresponding polarity region and a pole piece-to-target interface with said at least one target, and having an amount of said ferromagnetic material sufficient to achieve said second saturation flux density at the pole piece-to-target interface when in a closed magnetic circuit, said magnet-to-pole piece interface having a first area, said pole piece-to-target interface having a second area, said magnetic flux being routed into said pole piece via said magnet-to-pole interface and out of said pole piece via said pole piece-to-target interface, said routing of said magnetic flux through said pole piece resulting in an amount of concentration of said magnetic flux at said pole piece-to-target interface corresponding to the ratio of the first area divided by the second area, said amount of concentration of said magnetic flux corresponding to a maximum force density.