The working principle of a magnetizer is to charge a capacitor with a high - voltage direct - current and then discharge it through a coil with extremely low resistance. During the discharge, the peak value of the pulse current can reach tens of thousands of amperes. This current pulse generates a powerful magnetic field in the coil, which permanently magnetizes the hard magnetic materials placed in this magnetic field coil. When the capacitor of the magnetizer is working, the peak value of the pulse current is extremely high, so the performance requirements for the capacitor to withstand the impulse current are also very high.
The structure of a magnetizer is relatively simple. In fact, it is an electromagnet with extremely strong magnetic force, equipped with iron blocks of various shapes as additional magnetic poles to form a closed magnetic circuit with the object to be magnetized. During magnetization, the additional magnetic poles and the object to be magnetized are arranged properly, and finally, the exciting current is applied, and the magnetization can be completed in an instant.
Pulse Magnetizer: It discharges a high - voltage and small - capacity capacitor, which is suitable for magnets with high coercivity, such as Nd - Fe - B magnets. A momentary large - pulse current passes through the coil, causing the coil to generate a short - lived super - strong magnetic field. It is suitable for occasions where high - coercivity permanent magnetic materials are used or complex multi - pole magnetization is required. This kind of magnetizer is widely used by enterprises engaged in the production and application of permanent magnetic materials. It is suitable for the magnetization of various permanent - magnetic - material parts and components, such as Al - Ni - Co series, ferrite series, rare - earth permanent - magnetic series, etc., and is characterized by high efficiency and reliability. The equipment has no special requirements for the power supply configuration of the workplace and is convenient and flexible to use.
Constant - current Magnetizer: It discharges a low - voltage and large - capacity capacitor, which is suitable for magnets with low coercivity, such as ferrite magnets. Its working principle is to pass a constant - current direct - current through the coil, so that the coil generates a constant magnetic field. It is suitable for the magnetization of low - coercivity permanent magnetic materials.
