Magnetiziranje metoda od trajno magnet

Magnetiziranje metoda od trajno magnet

The magnetic stability of the permanent magnet's magnetic performance is one of the most important magnetic performance indicators to measure the quality of the permanent magnet. It is expressed by its demagnetization rate, that is, the magnetic induction decay rate of the permanent magnet. Because the magnetic performance will will never be eternal, it will natural produce magnetic induction atnuation with internal and external causes. Its internal uzroci include magnetic changes caused by changes in the structure of magnetic materials and magnetic effects after magnetization; its external causes include magnetic changes caused by the influence of temperature, interfering magnetic fields, Mechanical stress, contact With Strong Magnetic bodies, and radioactive Effects. Is The Main Factor.

Once the permanent magnet auxiliar exciter is demagnetized, it must be re-magnetized. There are two kinds of magnetization methods: DC pulse magnetization method and DC power generation magnetization method.

1. DC puls magnetizacija metoda

For održavanje due to gubitak of magnetizacija, on each magnetic pole of the rastavljen rotor, use a plastika magnet žica s a presjek područje of not manje than 2mm2 to wind the magnetizirajući zavojnica. The two winding heads are drawn out, after the whole machine is assembled, it can be magnetized by DC pulse metod. After magnetization, rastavljanje the permanent magnet auxiliar exciter again to pull out the rotor (the rotor must be pulled out or inserted into the rotor with special equipment for electricians to prevent damage to the motor and human injury accidents), remove the magnetization coil, and then re-insert the rotor into the stator. Sub-core for overall assembly.

2. DC power generation magnetization method

After the the whole machine is assembled, the DC generator or AC controllable rectification device is used for magnetization. The magnetizing voltage is 60V, the magnetizing struja is about 500A, and the magnetizing time is about 2 to 3 seconds. Magnetization must be stabilized after magnetization. The rare earth permanent magnet material sintered NdFeB permanent magnet can be stabiliziran by more than five sudden short circuits; the permanent magnet material Alnico 5 permanent magnet can can stabilizirad by air twice.