The function of the magnet is reflected by different data trademarks. The function of the data mark is reflected by five important indicators: remanent magnetic field magnetic coercivity intrinsic coercivity maximum magnetic energy product maximum operating temperature.

The function of the magnet reflects the remanence:

The full name of remanence is the intensity of remanence, which means that the magnet is magnetized into a full magnetic field in a closed circuit environment. At this time, the magnetic flux density of the magnet is called remanence.

Popular knowledge: Remanence is the magnetic field strength of the magnet after magnetization. Remanent Magnet abbreviation: Br

Remaining units: The units are mT millitesla and Gs Gauss.

2 Magnet function reflects magnetic coercivity:

The value of the reverse magnetic field strength required to reduce the magnetic induction intensity to zero when the magnet is in the state of full technology in reverse magnetization is called the magnetic induction coercive force.

A common understanding: the magnetized magnet, assuming that the magnetic field strength required for the magnet to return to zero is the magnetic coercive force. The magnetic induction coercive force is called: Hcb magnetic induction coercive force unit: An/m (A/m) and Oster (Oe) or 1Oe≈79.6A/m

The three  magnet functions reflect the intrinsic coercivity:

The residual magnetization of the magnet is reduced to zero. The strength of the reverse magnetic field to be applied is called the intrinsic coercivity. The intrinsic coercivity is a physical quantity that measures the demagnetization resistance of a magnet, and is the coercive force that indicates that the magnetization M under guessing returns to zero.

Different from the coercive force, when the reverse magnetic field H=Bc, although the magnetic induction intensity B of the magnet is 0, the magnet does not display magnetic flux, but the vector sum of the microscopic magnetic dipole moment inside the magnet is usually not that, at this time The magnetic polarization of the magnet tends to maintain a larger value in the original direction.

Therefore, Hc is not enough to characterize the inherent magnetism of the magnet; when the reverse magnetic field H increases to a certain value Hcj, the vector sum of the microscopic magnetic dipole moments inside the magnet is 0, and the reverse magnetic field is called the H value. The intrinsic coercivity Hcj of this data. The intrinsic coercivity is closely related to the temperature stability of rare earth permanent magnets. The higher the coercivity of the magnet, the better the temperature stability.

The four  magnets represent the largest magnetic energy product:

(BH)max The product of B and H at any point on the demagnetization curve, namely Bm  Hm and (BH), represents the magnetic energy density established by the magnet in the air gap space, that is, the magnetostatic energy per unit volume. The resulting air gap energy is equal to the product of the magnet Bm and Hm, so it is called the magnetic energy product. The correlation curve of the magnetic energy product changing with B is called the magnetic energy curve, and the product of Bd and Hd corresponding to a point has the maximum value, which is called the maximum energy product. One of many magnetic parameters, the direct industrial significance of which is that the magnetic energy product is larger and requires less magnetic data when the same action occurs. The visual indication on the hysteresis loop is: the line connecting the intersection of Hc and Br and the O line, and the product of Br and Hc corresponding to the intersection on the demagnetization line is the largest, called the maximum energy product.

The five magnet functions reflect the maximum working temperature:

The maximum operating temperature is that the magnet should not exceed the operating temperature indicated by the trademark. Example: The working temperature of N35 brand neodymium iron boron magnet (strong magnet) cannot exceed 80 degrees. Demagnetization will occur after 80 degrees.