Many friends who choose strong magnetic NdFeB magnets may not know much about its magnetizing effect. Different types of strong magnetic NdFeB magnets have different magnetizing effects. Then, how to add magnetizing to strong magnetic NdFeB magnets What's the role? Let's introduce it in detail:

How to add magnetism to NdFeB magnet

One of the tasks of the magnetic circuit design of neodymium iron boron magnets is to increase the magnetic flux density of the magnetic air gap as much as possible. It is easier for the circuit to increase the current density and only need to change the cross-sectional area of the wire. The smaller the cross-section, the higher the current density.

The criterion for improving the magnetic flux density of the operating air gap is that the same sex repels and the opposite sex attracts. The main methods of magnetizing strong magnetic NdFeB magnet are:

(1) Change the cross section of the magnetic circuit

(2) Prevent the magnetic lines of force from repelling each other

The magnet of the strong magnetic neodymium iron boron magnet is usually cylindrical, circular, and there is a certain relationship between its diameter, thickness and magnetic properties. The magnetization of a permanent magnet is a volume, which has been mentioned before, but the magnetic flux density is related to the area. It is an area quantity, Φ is the magnetic flux, and the unit is Weber (Wb) Lu is the cross-sectional area through which the magnetic flux passes. .

With the improvement of the coercivity of the strong magnetic NdFeB permanent magnet material, the recovery conductivity μ decreases, approaching the air permeability I. In this way, the magnetic resistance of the permanent magnet itself cannot be ignored, so the length of the permanent magnet in the magnetization direction should not be too long.

The magnetic circuit is not so convenient, except for very few conditions, there is no impenetrable matter in the magnetic field lines. As long as the magnet is conductive, there is no non-conductive magnet. However, the change in the geometry of the magnetic circuit and the proper placement of permanent magnets and magnetic conductors can still increase the magnetic flux density of the operating air gap.