How to prevent permanent magnet motor demagnetization

A permanent magnet motor refers to a generator whose excited magnetic field is generated by permanent magnets, and there are many classifications of permanent magnet motors, which were introduced last time. However, the demagnetization phenomenon of permanent magnet motors is inevitable. The demagnetization of this motor has a great impact. If it is not prevented in time, it will cause unnecessary trouble. So how to prevent the demagnetization of permanent magnet motors? Let me introduce it to you below!

The effects of permanent magnet motor demagnetization include a drop in the generator output voltage, a reduction in motor torque, an increase in the no-load speed of the DC motor, and a small load torque. In view of the greater damage caused by demagnetization of this motor, the preventive measures will be introduced below.

Regarding the measures to prevent demagnetization of permanent magnet motors, there are actually many things we can do. For example, we must select appropriate power for the permanent magnet motor. Under normal circumstances, just leave a certain margin. This can prevent overloading. Cause excessive temperature, and then prevent or delay demagnetization. At the same time, it is also necessary to prevent heavy-load starting and frequent starting of permanent magnet equipment.

If the design of the permanent magnet equipment can be slightly improved, it will also have the effect of preventing demagnetization, mainly by revising the thickness of the permanent magnets in the equipment, the structural layout method, the ventilation circuit inside the rotor, etc., which will be more beneficial to the motor. Stable operation, and if the permanent magnet material is aged before use, the possibility of demagnetization can be eliminated in advance.

The permanent magnet motor is a high-tech equipment often used in industrial production and work. The use of this equipment accelerates the development of the industrial process.

Permanent magnets are both a magnetic source and an integral part of the magnetic circuit in the motor. First of all, the permanent magnet generator omits the field winding, brushes and collector ring structure, so the structure of the whole machine is very simple, which prevents the field winding of the excitation generator from being easily burned, short wires, and collector rings from being easily worn, etc. Wait for failure.

Secondly, the permanent magnet generator adopts a simplified rotor structure, which has two types: parallel magnetic field structure and series magnetic field structure. The rotor of the parallel magnetic field structure is made of casting and pressing, with the permanent magnet embedded inside, and the rotation speed is very high. The rotor of the series magnetic field structure is made of steel, and the permanent magnets are embedded in the surface, so the surface magnetic induction intensity of the rotor is stronger and the overall structure is more solid. Then, the permanent magnet generator has good low-speed power generation performance and higher output power.

In addition to the above advantages, permanent magnet motors are also highly efficient, energy-saving, and have high voltage stabilization accuracy, which can extend the service life of the battery and are free from wireless interference.