Arc Motor Magnets China Manufacturer

In this article, we will introduce what arc motor magnets are, the main types of materials available, how to choose them, and alternative solutions.

What is an arc shaped motor magnets?

An arc-shaped motor magnet is a permanent magnet specifically designed for the internal structure of a motor. It is curved in an arc shape to fit the circumferential shape of the inner wall of the motor stator or rotor. This design enhances spatial utilization, motor efficiency, and magnetic field distribution, making it widely used in permanent magnet synchronous motors (PMSM), brushless DC motors (BLDC), wind turbines, electric tool motors, and electric vehicle drive motors.

The core function of arc motor magnets

The core function of arc curved motor magnets is to form an efficient and stable magnetic field by closely fitting the motor structure, thereby improving the motor's torque output, energy efficiency ratio, smooth operation, and overall performance.

Curved bonded neodymium magnets

Main materials used for curved motor magnets:

Currently, ferrite and neodymium are the most commonly used materials. Neodymium is suitable for high-efficiency, high-speed motors and requires a high temperature resistance rating to withstand high-temperature environments, such as N48SH and N45UH. Ferrite is suitable for cost-sensitive products such as household appliance fans and ordinary motors, with grades generally selected as Y30BH and Y35.

View permanent magnet grade table; Neodymium Grade Chart Ferrite Grade Chart

Arc shaped magnet selection;

Rare earth neodymium arc-shaped magnet

Ceramic ferrite arc-shaped segment magnet

Curved samarium cobalt permanent magnet

Curved motor magnet selection;

The main considerations are magnetic performance, cost, size, temperature resistance, etc. For space-constrained products, high-performance neodymium iron boron magnets are preferred to reduce magnet size. For home appliances, fans, etc., ferrite materials can be considered. For more details, please read: How to choose a suitable curved magnet?

Alternative solutions for curved motor magnets;

Material substitution: For applications with low magnetic performance requirements and strict cost constraints, such as floor fan motors and water pump motors, ferrite materials can be used as a substitute for neodymium. For motors that prioritize high power density, low noise, and high efficiency, ferrite can be replaced with neodymium.

Shape Substitution: For example, using sector-shaped (wedge-shaped) or bread-shaped magnets to replace arc-shaped magnets, rectangular magnets to replace arc-shaped magnets, or multi-pole magnetized ring-shaped magnets to replace individual arc-shaped magnets.

The above are some main introductions about the magnets of the arc motor. Our company can customize them according to your technical requirements on the drawings. Please feel free to send inquiries for pricing.

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