NdFeB magnet is that it should be a wide range of physical properties. The most important thing is NdFeB magnet magnetizing method, commonly used in magnetizing method: DC magnetizing pulsed magnetic field magnetization, the superconducting magnetic field magnetizing method of three kinds.

DC magnetization: In the electromagnet coil Tong DC, resulting in magnetizing magnetic field. Commonly used purposes referred to a smaller permanent magnet, but because of large energy consumption, starting slowly, cooling difficulties, and difficult to produce a strong magnetizing magnetic field, is now seldom used.

Pulsed magnetic field magnetization: first alternating current into direct current is stored in the capacitor switch, and then discharge the capacitor transient or high-capacity grain-pressure discharge generated within the coil in the sprint a strong pulse current, resulting in a strong pulsed magnetic field, so that the coil inside the The magnets are magnetized. Pulsed discharge, a few milliseconds of the pulse current can be achieved 100KA above, the general pulse magnetizing device can provide the maximum magnetic field is about 6-10T, in principle, can be coercive force of 2400KA / m in the demagnetization of permanent magnet material charge to the saturated state. Because of its easy to produce a strong magnetic field. Magnetization short cycle. Suitable for continuous magnetization. Energy loss is small, relatively low cost. Cooling problem easier to solve, equipment, small size and so on. Be widely used.

Superconducting magnetic field magnetizing method: using superconducting materials, coil winding, cooling to the superconducting critical temperature of about, its resistance will suddenly disappear, simply add a small superconducting coil voltage, you can have a very strong superconducting magnetic field. Such devices require liquid nitrogen refrigerant.