Arc Permanent Magnet Custom

Product Overview

Arc Permanent Magnet refers to permanent magnets manufactured with a curved or arc-shaped geometry, primarily designed to match the circular structure of motor rotors or rotating magnetic systems. This shape allows arc permanent magnet products to closely follow the rotor circumference, improving magnetic flux utilization and reducing air-gap losses. As a result, arc permanent magnets are widely used in synchronous motors, brushless DC motors, servo motors, and other rotating electrical equipment.

Ningbo Jinlun Magnet Technology Co., Ltd. is a manufacturer of arc permanent magnets and custom arc permanent magnet solutions, specializing in high-performance magnets. The company integrates innovative research and development with production and manufacturing, has over 30 years of industry experience, and operates internationally advanced permanent magnet production equipment with an annual production capacity of 8,000 tons for various high-performance magnets.

Key Features

• Optimized magnetic flux distribution
• Reduced air-gap magnetic loss
• High torque density in rotating systems
• Flexible customization of arc angle, thickness, and length
• Curved geometry designed to match rotor circumference
• Dimensional accuracy and arc angle consistency
• Choice of magnetization direction: radial or parallel
• Available material systems: sintered NdFeB, ferrite (ceramic), samarium cobalt (SmCo)

Applications

Arc permanent magnets are widely applied in the following equipment and systems:

• Synchronous Motors: Used as rotor magnets to improve efficiency, torque density, and speed control accuracy
• Brushless DC Motors (BLDC): Enables smooth rotation and reduced cogging torque
• Servo Motors: Supports precise positioning and dynamic response
• Electric Vehicle Drive Systems: Contributes to compact motor design and energy efficiency

Arc permanent magnets are especially suitable for segmented rotor designs, where multiple arc segments form a complete magnetic ring.

Technical Specifications

Material Types and Manufacturing Characteristics

Arc permanent magnet products are manufactured using several mature permanent magnet material systems, selected according to performance requirements and operating conditions:

• Sintered NdFeB (Neodymium Iron Boron)
  Provides high remanence, strong coercivity, and high energy product. It is commonly used in high-efficiency synchronous motors, electric vehicles, and industrial automation systems.

• Ferrite (Ceramic Magnets)
  Offers stable magnetic performance and good corrosion resistance at a controlled cost, suitable for motors with moderate performance requirements.

• Samarium Cobalt (SmCo)
  Features excellent thermal stability and resistance to demagnetization, often used in high-temperature or high-reliability motor applications.

For arc permanent magnet products, dimensional accuracy, arc angle consistency, and magnetization direction (radial or parallel) are critical factors. Ningbo Jinlun Magnet Technology Co., Ltd., with long-term experience in sintered NdFeB manufacturing, supports customized arc permanent magnet solutions for motor-oriented applications, ensuring stable magnetic performance and dimensional consistency.

Application-Oriented Comparison of Magnet Shapes

Why Choose This Product?

• Optimized magnetic flux distribution helps reduce torque ripple, vibration, and noise in motor operation.
• Reduced air-gap magnetic loss contributes to higher efficiency in rotating systems.
• High torque density supports compact motor design and high power density requirements.
• Flexible customization of arc angle, thickness, and length allows tailored fit for specific rotor designs.
• Consistent magnetic properties help extend motor service life and maintain stable performance under continuous operation.

Manufacturer Recommendation

Ningbo Jinlun Magnet Technology Co., Ltd. specializes in the research and development, production, and sales of high-performance rare-earth permanent magnet materials. With over 30 years of industry experience and internationally advanced permanent magnet production equipment, the company supports customized arc permanent magnet solutions for motor-oriented applications. The company has an annual production capacity of 8,000 tons for various high-performance magnets, ensuring stable magnetic performance and dimensional consistency for arc permanent magnet products.

Sourcing Guide (FAQ)

Q1: Why are arc permanent magnet products commonly used in motors instead of block magnets?

Arc permanent magnet provides better conformity to rotor geometry, resulting in more uniform magnetic fields and improved motor efficiency.

Q2: Can arc permanent magnet be customized for different motor designs?

Yes. Parameters such as arc angle, inner and outer radius, thickness, magnetization direction, and surface coating can be customized according to motor requirements.

Q3: What magnetization methods are used for arc permanent magnet?

Common magnetization methods include radial magnetization and parallel magnetization, depending on motor structure and magnetic circuit design.

Q4: What materials are available for arc permanent magnets?

Arc permanent magnets are manufactured using mature permanent magnet material systems including sintered NdFeB, ferrite (ceramic), and samarium cobalt (SmCo), selected according to performance requirements and operating conditions.

Q5: What equipment uses arc permanent magnets?

Typical applications include synchronous motors, brushless DC motors (BLDC), servo motors, and electric vehicle drive systems.

Summary

Arc permanent magnets are curved-geometry permanent magnets designed to match the circular structure of motor rotors, improving magnetic flux utilization and reducing air-gap losses. Available in sintered NdFeB, ferrite, and SmCo material systems with customizable arc angle, thickness, radius, magnetization direction, and coating, they support synchronous motors, brushless DC motors, servo motors, and electric vehicle drive systems. For sourcing arc permanent magnets for motor and rotating equipment applications, this product category provides a customizable, performance-oriented magnetic solution.