Neodymium Ring Magnet manufacturer introduces the principle and method of magnetizing magnet:
There are two types of magnet magnetizers currently in use, constant current magnetizer and pulse magnetizer.
1. The working principle of the constant current magnetizer: the coil generates a constant magnetic field through a constant current of direct current in the coil. It is suitable for magnetizing low-coercivity permanent magnet materials, such as ferrite and low-coercivity neodymium iron boron.
2. The working principle of the pulse magnetizer: the instantaneous pulse large current is passed through the coil to make the coil generate a short super-strong magnetic field. Suitable for high-coercivity permanent magnet materials or complex multi-pole magnetization occasions. It is widely used in permanent magnet material production and application enterprises, suitable for the magnetization of various permanent magnet material parts and components. The equipment has no special requirements for the power configuration of the work site, and it is convenient and flexible to use.
3. Pulse magnetization specifically, is to first charge the capacitor with a DC high voltage, and then discharge it through a coil with very small resistance. The peak discharge pulse current can reach tens of thousands of amperes. This current pulse generates a strong magnetic field in the coil, which permanently magnetizes the hard magnetic material placed in the coil.
4. The peak value of pulse current is extremely high when the capacitor of the magnet magnetizer is working, and the performance of the capacitor to withstand the impact currently is very high. The structure of the magnetizer is relatively simple. It is an electromagnet with extremely strong magnetic force. It is equipped with iron blocks of various shapes as additional magnetic poles to form a closed magnetic circuit with the magnet to be magnetized. When magnetizing, arrange additional magnetic poles, and The magnet to be charged can be completed in an instant by adding the exciting current.
5. The magnetizing directions of circular or ring magnets include axial, radial, multi-level, and radiation magnetization. The NS poles of the square magnet will appear in pairs on the corresponding two faces of the six faces. After the magnet is magnetized, it can be packaged and shipped.