This Halbach Array is a cylinder / ring version with a dipole (2 pole) pattern in the central air gap. The magnetic field within the ring is uniform (parallel field lines which are homogenous) across the entire central hole and of high strength (above 10000 Gauss or 1 Tesla), both being features of this style of Halbach Array. The NdFeB Halbach Array ring is made from 8 magnets (45 degree arc segments, each with a specific direction of magnetisation). Each arc segment has the direction of magnetisation such that the magnetic field traverses the central air gap and is then ‘guided’ through and around the magnet material itself.
The NdFeB Halbach Array we offer is a two pole version that is 110mm in diameter with a 30mm diameter central hole. It is 40mm in axial length. It uses standard +80 deg C maximum recommended operating temperature NdFeB (Neodymium Iron Boron). The field in the centre of the air gap is at least 10000Gauss / 1Tesla at ambient temperature. The outer protective sleeve is of brass construction.
Typical uses for Halbach Arrays include motors, generators, R&D, medical, magnetic levitation, etc.
We can manufacture other Halbach Arrays upon request. For example, the ring can be made from more arc segments (the higher the number of segments, the better the uniformity of field within the central air gap, but the assembly cost increases) or we can produce to a different magnetic field pattern (multiple pole pairs).
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