How to Design a Cost-Saving Ferrite Motor

✨ Core Goal: Design a cost-effective ferrite motor with stable performance (target: cost reduction by 20%-30% compared with rare earth permanent magnet motors)
How to design a ferrite motor to save costs? Compared with rare earth permanent magnet motors, ferrite permanent magnet motors have the advantages of high demagnetization resistance (high temperature resistance, applicable to -40℃~150℃ working environment) and low cost (material cost is only 1/5~1/3 of rare earth magnets). However, their low residual magnetism leads to low air-gap magnetic density (only 0.3~0.5T) and insufficient permanent magnet torque (about 80% of rare earth motor torque under the same power).
Therefore, the key problem is to solve the low torque density while saving a lot of costs. There are two solutions:
✅ Solution 1: IPM Motor
Adopt built-in permanent magnets or tangential flux design. Each pole’s magnetic flux is provided by two parallel magnets, which can increase the air-gap magnetic density to 0.6~0.8T, making up for the low residual magnetism of ferrite and improving magnetic density by 20%~30%.
✅ Solution 2: Permanent Magnet Assisted Synchronous Reluctance Motor
Use IPM rotor structure to increase the saliency ratio by 15%~25%, and make up for the insufficient permanent magnet torque with reluctance torque, increasing the overall output torque by 10%~15%.
📌 Classic Case: Multi-layer U-shaped rotor structure
– ✅ Performance: Effectively improve magnetoresistive torque and power density, the motor efficiency can reach 88%~92% (same as rare earth motors)
– ✅ Cooling: Equipped with liquid cooling system and spiral cavity aluminum shell, reducing the motor temperature rise by 15~20℃, ensuring long-term stable operation
– ✅ Stability: Multi-layer arrangement and rotor stack design, the demagnetization resistance is increased by 30%~40%, and it can withstand high load and short-circuit faults
– ✅ Cost-Saving: Uniform-size permanent magnets reduce processing costs by 10%~15%, and the overall motor cost is 40%~60% lower than that of rare earth permanent magnet motors
📢 Supplier Info: Source: Network Comprehensive. We are a professional supplier offerrite magnetic tiles (arc magnets), with a monthly supply capacity of 200T, and the customization cycle is 7~15 working days. For quotation, customization and consultation, please contact us.

📩 shirley@gaumumagnet.com