How to Choose a Bonded Ferrite Magnet Suitable for Fan Motors

As a common electrical component, the performance of fan motors largely depends on the bonded ferrite magnets used.

So, how to choose a bonded ferrite magnet suitable for fan motors?  This article will provide you with a detailed introduction.

When selecting a bonded ferrite magnet suitable for fan motors, several factors need to be considered.  Firstly, understand the different types of ferrite magnets

It is crucial.  Generally speaking, the ferrite materials used in motors mainly include hard magnetic and soft magnetic (core) materials.

Common ferrite magnets include anisotropic ferrite radial ring magnets, ferrite isotropic magnets, injection molded ferrite rotors, and ferrite magnetic tiles.  The multi-stage magnetization method of anisotropic ferrite radial ring magnets is mainly used in household appliances, water pumps, office automation equipment, and some automotive permanent magnet motors.  Ferrite magnets have relatively weak magnetic force and are mainly used in toy motors and video player motors.  Injection molded ferrite rotors are mainly used in brushless DC motors, ventilation fan motors, automotive oil pumps, instruments, etc.  Ferrite magnetic tiles are inexpensive and have superior heat resistance.  They are commonly used in treadmill motors, solar fan motors, car window lift motors, 550 motors, and more.

In addition, there are two series of ferrite magnets: isotropic and anisotropic.  Depending on the molding process, anisotropic ferrite can be divided into dry pressure and wet pressure.  According to the main components, there are two commonly used types: barium ferrite and strontium ferrite.

A bonded ferrite magnet is a composite permanent magnet material made by mixing ferrite powder with rubber or plastic.  Bonded ferrites are divided into soft bonding (rubber bonding) and hard bonding (plastic bonding).  The soft bonding product is the rubber magnet, which can be pressed into sheets or strips.  Bonded ferrite has the characteristics of good flexibility, easy processing, low cost, good temperature stability, good corrosion resistance, and high coercivity.

When selecting bonded ferrite materials, their magnetic properties also need to be considered.  Due to the filling of a large amount of non-magnetic binder with a volume of 10% -15%, the magnetic properties of bonded ferrites are usually lower than those of similar sintered ferrites.  But the advantage of bonding ferrite is that it can generate magnetic energy products of any size from maximum to zero.

In summary, selecting a bonded ferrite magnet suitable for fan motors requires comprehensive consideration of factors such as the type of magnet, its magnetic properties, and cost to ensure the performance and reliability of the fan motor.