Applications and Common Specifications of Ferrite Rotor Magnets for Electric Motors

Among various motor products, rotor magnets are one of the core components determining motor performance, cost, and reliability. Compared to rare earth permanent magnet materials like neodymium iron boron, ferrite rotor magnets remain widely used in medium-to-low power motors due to their advantages of low cost, good temperature resistance, and strong demagnetization resistance. This article will introduce them from two aspects: applications and common specifications.

Applications of Radial Ferrite Permanent Magnet Rotor Magnets

These magnets provide stable magnetic fields at lower costs, enabling reliable, temperature-resistant, and long-term motor drives. Common applications include home appliance motors, small DC and brushless motors, low-cost permanent magnet synchronous motors (PMSM), automotive auxiliary motors, and fan/pump motors.

Common Specifications and Applications of Ferrite Rotor Magnets (Ring Type)

D20*d11.6*24.8mm 24-pole (for variable-frequency air conditioner motor rotors)

D16*d11.9*12.9mm 10-pole (instrument motor rotors)

D20*d15*16mm 24-pole (inverter air conditioner motor rotor)

D54*d35.5*25.7mm 8-pole (window-type air conditioner motor rotor)

D22*d18*27mm 24-pole (inverter air conditioner motor rotor)

D63*50*40mm 4-pole (Santana automobile engine motor rotor)

D16*5*20mm 4-pole (Water pump motor rotor)

D16*5*28mm 4-pole (Water pump magnet)

D21*d6*32mm 4-pole (Rockery fountain water pump motor)

The above covers the applications and common specifications of ferrite rotor magnets for motors.