The parameters of the magnetic properties of NdFeB Magnets are:

1. Magnetic energy product (BH)

Definition: The product of the magnetic flux density (B) and the corresponding magnetic field strength (H) at any point of the demagnetization curve of the permanent magnet. It is a parameter that characterizes the total stored energy in the externally generated magnetic field per unit volume of permanent magnet material. Unit: Mega High O (MGOe) or Coke/M3 (J/m3)

Brief Description: The product of B and H at any point on the demagnetization curve, that is, BH, is called the magnetic energy product, and the maximum value of B×H is called the maximum energy product, which is the D point on the demagnetization curve. The magnetic energy product is one of the important parameters to measure the amount of energy stored in the magnet. A magnet corresponding to a certain energy when the magnet is used requires that the volume of the magnet be as small as possible.

ndfeb magnets characterize magnetic material parameters

2, residual magnetism Br

Definition: Magnetization of the magnetic material of the neodymium iron boron magnet to remove the magnetic field remaining on the magnetized ferromagnet.

3. Coercivity (Hcb, Hcj)

Hcj (inner coercivity) reduces the magnetization of a magnet to zero. The magnitude of the applied reverse magnetic field, which we call the intrinsic coercivity. The intrinsic coercivity is a physical quantity that measures the anti-demagnetization ability of a magnet and is a coercive force indicating that the magnetization M in the material retreats to zero. In the use of the magnet, the higher the coercive force of the magnet, the better the temperature stability.

Hcb (Magnetic Coercivity) When a magnetic field is applied to a magnetic material, the value of the reverse magnetic field strength required to reduce the magnetic induction to zero is called the magnetic coercive force (Hcb). However, the magnetization of the magnet is not zero at this time, but the applied reverse magnetic field and the magnetization of the magnet cancel each other out. (The external magnetic induction performance is zero.) At this time, if the external magnetic field is removed, the magnet still has a certain magnetic property.

4, temperature coefficient

Remanent reversible temperature coefficient αBr: When the working environment temperature rises from room temperature T0 to temperature T1, the remanence Br of the neodymium iron boron magnet also decreases from B0 to B1; when the ambient temperature returns to room temperature, Br cannot recover to B0. And only to B0'. Thereafter, when the ambient temperature changes between T0 and T1 (assuming that the amount of change is not large), the change in Br is linearly reversible. The remanent reversible temperature coefficient αBr is: · Similarly, we can get the temperature coefficient βHcj of the intrinsic coercive force Hcj as follows: The temperature coefficient α and β are only the reversible change of magnetic properties, that is, the recovery temperature can be Restore magnetic performance.

The solution for the magnetic material parameters of NdFeB magnets is for reference only!