Halbach Array

Halbach Array and Halbach permanent magnet are a kind of magnet structure. In 1979, Klaus Halbach, an American scholar, discovered this special permanent magnet structure while doing electron acceleration experiments and gradually improved it. The result is a "Halbach" magnet, an engineering near-ideal structure that uses a special arrangement of magnets to enhance the field intensity in the unit direction, with the goal of producing the strongest magnetic field with the smallest number of magnets.

This array is completely composed of rare earth permanent magnet materials. By arranging permanent magnets with different magnetization directions according to certain rules, magnetic field lines can be gathered on one side of the magnet and weakened on the other side, so as to obtain a relatively ideal unilateral magnetic field. This has a very important significance in engineering. With its excellent magnetic field distribution characteristics, Heilbuick array is widely used in industrial fields such as nuclear magnetic resonance, magnetic levitation, permanent magnet special motor and so on.

Above is a Halbeck array with strong magnetic fields at the top of the magnets and relatively weak fields at the bottom. (The magnetic field intensity of the strong side surface of the Halbeck array magnet group with the same volume is about √2 times (i.e. 1.4 times) that of the traditional single magnet, especially when the thickness of the magnet in the magnetizing direction is 4 ~ 16mm).