About Neodymium Halbach Array Magnets
A Halbach array (HA) is a particular configuration of permanent magnets that concentrates the magnetic field on one side while canceling it out to virtually zero on the other. Figure 1 depicts its two sets of magnets, the primary magnets and the transit magnets. The magnetic field of the Halbach array is concentrated on one side (the active side) due to the superposition of the magnetic flux produced by the primary magnets and transit magnets. Assuming the magnetic field strength generated by the main magnets is identical to that generated by the transit magnets, the active-side of the Halbach array will have double the magnetic field strength compared with the normal configuration. The other side of the Halbach array (the quiet-side) will have a negligible magnetic field.
Higher-order Halbach permanent magnet arrays that produce higher flux densities in the air gaps of electromotive machines are described. In one embodiment, a second order "Hyper" Halbach array includes a plurality of magnets arranged immediately adjacent to each other so as to define a rectangular matrix having rows and columns in which the respective magnetic fields of a first row of the array are arranged so as to define a conventional first order Halbach array, and, proceeding in a column direction of the array, the respective magnetic fields of the magnets of each of a second and succeeding rows of the array are respectively rotated counter-clockwise about an axis perpendicular to the column direction of the array through successive 90 degree rotations relative to those of the immediately preceding row.
Product Name: Neodymium Halbach Array Magnet
Material: Neodymium Magnet
Lead Time: About 30 days
Used: Industry machinery world.