How can permanent magnets be magnetized?
Magnetizing method of permanent magnetic material:(1) the principle of magnetizing is to use magnetic force to form hysteresis loops in the material. The amplitude is high, the width is large, and the remanence is large. In order to obtain the above results, proper magnetic materials are needed.(2) in theory, the higher the temperature, the more unfavorable for the remanence, and about 760 degrees will be completely magnetic loss.(3) usually after complete demagnetization, then magnetization.(4) the polarity of the electromagnetic coil is set back.(5) the magnetic flux linkage is closely related to the magnetic field strength, and the chain value is large and the magnetic field strength is large.
It should be said that there is no element attenuation, only demagnetization is not net, and the latter magnetization direction is opposite, forming polarity reduction, so performance magnetization effect is not good.
The permanent magnet made of permanent magnetic material has no magnetic force. Compared with non permanent magnetic material, it has very large remanence,The material with great remanence is also called hard magnetic material, and the material with small residual magnetism is also called soft magnetic material,The hard magnetic material is processed into the required shape and placed in an extremely strong magnetic field formed by an electromagnet. This is called magnetization,By magnetizing it becomes a true permanent magnet.
