Types of bonded ferrite magnets for fan motors

Heterosexual ferrite radial ring magnets are widely used in fan motors. This kind of magnet adopts multi-level magnetization method, which is mainly used in household appliances, some automotive permanent magnet motors and other fields. It has unique advantages, such as in the assembly process of the motor assembly, it is much easier than the arc magnet to stick to the ring, and the assembly cost is lower. At the same time, it improves the uniformity of magnetic flux, thus improving the efficiency of the motor, and the assembly accuracy is much higher than the traditional multi-arc assembly accuracy, improving the dynamic balance of the motor, but also improve the utilization rate of raw materials.

The magnetic force of ferrite magnet is weaker than that of heterosexual ferrite, which is mainly used in toy motors and video recorders. Compared with other materials, although its magnetic force is weak, it also has its value in specific application scenarios.

Injection molded ferrite rotor is mainly used for brushless DC motor, ventilator motor and so on. Injection molding magnetic is a new type of composite permanent magnet material, with large shape freedom, high dimensional accuracy, magnetic properties can be adjusted on demand, good product consistency, composite molding, large directional freedom, as well as high mechanical strength, high dimensional accuracy, complex shape, multi-pole magnetization, with good toughness and can be embedded in metal and plastic parts of the functional magnet characteristics.

Ferrite magnetic tile is cheap, excellent heat resistance, and is mostly used in fan motors. Ferrite magnetic tile has many advantages in the motor, such as high residual magnetic induction intensity Br can ensure that the motor has a high speed, large output torque and large power, thereby improving the efficiency of the motor; The high Hcb can ensure the electromotive force required by the motor output, make the motor operating point close to the maximum magnetic energy product, and make full use of the capacity of the magnet; High Hcj can make the motor have strong anti-overload demagnetization, anti-aging, anti-low temperature and so on. In addition, the better the rectangularity of the demagnetization curve of the ferrite tile, the smaller the dynamic loss of the motor, the higher its resistivity, the smaller the eddy current loss, the smaller the temperature coefficient, and the good temperature stability at high temperatures.
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