Causes and influences of unsaturated magnetization bonded NdFeB magnets

Magnets made of different magnetic materials require different magnetization energy. Compared with ferrite magnets and sintered NdFeB magnets, bonded NdFeB magnets require higher magnetization energy to achieve saturation magnetization. If the applied magnetic field is lower than the saturation magnetization The required magnetic field will cause the unsaturated magnetization of the bonded NdFeB magnets.

The picture below shows the external magnetic field required for ferrite, bonded NdFeB, and sintered NdFeB to achieve saturation magnetization

What are the causes of unsaturated magnetized bonded NdFeB?

1. The current of the magnetizing system is insufficient

2. The magnetizer is not suitable

3. The magnetizing fixture is not suitable

What are the effects of unsaturated bonded neodymium magnets?

The possibility of magnet demagnetization increases, the no-load speed increases, the current increases, the stall torque decreases, the maximum output power decreases, and the efficiency decreases.

How can it be considered saturation magnetization?

A magnet is considered saturated when increasing magnetization energy fails to produce a significant change in magnet performance (usually less than 2%).

Note: The magnetization energy required for saturation magnetization bonded neodymium magnets is determined by the magnet size, density, material and required magnetization method.

More about bonded neodymium magnets;

Magnetization Direction of Bonded Neodymium Magnets

Bonded vs sintered neodymium magnets