This is a fan motor ring magnet, its surface is black, but it is not ferrite, but bonded neodymium magnet, the specific size of the outer diameter 56mm, the inner diameter 53mm, the thickness of 10mm, the unilateral wall thickness is relatively thin, only 1.5mm, the magnetic field strength according to the customer's choice of grade, generally around 900-1150 Gauss.
In fan motors, the multipole magnetic ring is usually tightly combined with the rotor (also known as the rotor magnet), which together form the rotating part of the motor. When the current passes through the winding of the motor, the magnetic field in the multipole magnetic ring generates a magnetic force that interacts with the rotor magnet. This interaction causes the rotor to be subjected to a force, which begins to rotate.
The design and configuration of multipole magnetic ring have important influence on the performance of motor. By changing the number and arrangement of the magnetic poles of the multipole magnetic ring, the speed, torque output and efficiency of the motor can be adjusted. In general, the more poles of the multipole magnetic ring, the lower the speed of the motor, but the greater the torque output. Conversely, the fewer poles, the higher the RPM, but the smaller the torque output. Therefore, when designing electric fans, it is necessary to select the appropriate multipole magnetic ring according to the required air volume and power.
In addition, the multi-pole magnetic ring can also improve the running stability of the motor and reduce vibration noise. Because the magnetic field of the multipole magnetic ring is more uniform, the force on the rotor is also more balanced, which reduces the vibration and noise during the operation of the motor.
More Fan/ceiling fan motor multi-pole magnetic ring;
Fan motor 10 pole injection molded ring magnet 58x53x14mm
Bldc fan magnet ring plastic magnetic 10 poles 56 x 49.5 x 15 mm
Multipole Injection molding ferrite ring for fan motor 68.2x56x27.2m