NdFeB magnet NdFeB permanent magnet materials, the use of the main guarantee of the performance of electromagnetic devices is not in the long run due to changes in magnetic material properties and therefore its electrical changes, the magnetic properties of permanent magnets required to maintain long-term stability. NdFeB Magnets affect the stability of many factors.

The stability of NdFeB magnets main factors: changes in internal structure, magnetic aftereffect, chemical factors, temperature, external magnetic field, mechanical action, and strong magnetic transmission. In addition, the permanent magnet magnetic circuit system itself factors, such as permanent magnets the size ratio of the length of the working air gap, magnetic circuit saturation level of permanent magnet operating point of the choices. Will also affect the stability of magnetic properties of permanent magnets.