NdFeB Halbach Array

An introduction to NdFeB Halbach Array

NdFeB Halbach Array

The NdFeB Halbach Array is a specialized magnetic assembly consisting of Neodymium Iron Boron (NdFeB, NIB, Neo) permanent magnets assembled in such a way as to provide a controlled (uniform and homogenous) and high magnetic field strength without the use of ferromagnetic materials.

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).

Please be aware that the lead time for making the Halbach Array is typically 6-7 weeks. If ordered alongside other products from our extensive range of magnets, we would ship the NdFeB Halbach Array separately and we would inform soon after placing your order of the estimated delivery date for the Halbach Array.

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Types of NdFeB Halbach Array

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Part No. Size Grade Pull (kgs)
ES835 OD110mm x ID30mm x 40mm NdFeB dipole Halbach Array 10000 Gauss
ES835
OD110mm x ID30mm x 40mm
NdFeB dipole Halbach Array
10000 Gauss

If your requirement is for larger volumes we can help!

E-Magnets UK offers a wide range of solutions for handling large volumes of magnets for a number of Global clients. We currently:

  • Manage volumes for certain OEM clients of several million magnets per year
  • Can guarantee stock on rolling monthly call offs
  • Operate JIT systems
  • Offer PPAP etc...

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