Trapezoid Sintered NdFeB Custom Permanent Magnet

Product Overview

Trapezoid Sintered NdFeB refers to sintered neodymium-iron-boron permanent magnets manufactured in a trapezoidal geometry to meet specific magnetic circuit and mechanical assembly requirements. Products within this category share common characteristics such as high magnetic energy density, precise angular geometry, and suitability for structured magnetic systems where linear or curved flux distribution is required.

Trapezoid Sintered NdFeB magnets are widely used in rotating equipment, segmented magnetic assemblies, and electromagnetic conversion systems where shape accuracy directly affects performance and efficiency. Compared with standard block magnets, trapezoidal magnets provide improved magnetic field continuity in rotational systems. Compared with arc-shaped magnets, trapezoidal designs allow greater flexibility in segmented assemblies and tooling control.

Key Features

• Stable magnetic output under compact design constraints
• Compatibility with segmented rotor and stator structures
• High dimensional accuracy to support repeatable magnetic performance
• Suitability for medium- to high-speed electromagnetic equipment
• Based on sintered NdFeB material providing high remanence (Br), coercivity (Hcj), and maximum energy product (BHmax)
• Trapezoidal shape enables optimized magnetic field alignment, reduced air gaps, and improved flux concentration in complex assemblies
• Protective coatings available including nickel, epoxy, and zinc to reduce corrosion risks
• Grade customization based on temperature and coercivity requirements

Applications

• Permanent magnet synchronous motors (PMSM)
• Wind power generators and auxiliary drive systems
• Industrial automation equipment
• Magnetic pumps and sealed transmission systems
• Automotive electric drive components
• Magnetic couplings and transmission devices
• Sensor and actuator systems

Technical Specifications

Why Choose This Product?

In permanent magnet motors, trapezoidal magnets are arranged circumferentially on the rotor. The trapezoidal geometry allows tighter fitting between adjacent magnets, reducing flux leakage and improving torque density. The sintered NdFeB material provides a stable magnetic field that interacts with stator windings to generate rotational force or electrical output. In magnetic couplings, Trapezoid Sintered NdFeB magnets are positioned to create alternating magnetic poles. Torque is transmitted through magnetic interaction rather than mechanical contact, enabling sealed transmission systems and reduced wear. The controlled magnetic field distribution of trapezoidal magnets supports precise position detection and force control, improving signal stability in industrial sensors and linear actuators.

Manufacturer Recommendation

Ningbo Jinlun Magnet Technology Co., Ltd. is a leading China Trapezoid Sintered NdFeB Manufacturer and Custom Trapezoid Sintered NdFeB Factory, specializing in producing high-performance magnets. The company is a modern, comprehensive enterprise that integrates innovative research and development with production and manufacturing. Jinlun Magnet has over 30 years of industry experience and is equipped with internationally advanced permanent magnet production equipment, with an annual production capacity of 8,000 tons for various high-performance magnets.

Ningbo Jinlun Magnet Technology Co., Ltd. produces Trapezoid Sintered NdFeB using controlled powder metallurgy processes, including orientation pressing, vacuum sintering, and precision machining. The production process emphasizes controlled grain orientation for predictable magnetic output, dimensional tolerance control for segmented assemblies, and grade customization based on temperature and coercivity requirements.

Sourcing Guide (FAQ)

Q1: Why choose trapezoidal magnets instead of rectangular ones?
Trapezoidal magnets improve magnetic circuit continuity in curved or segmented assemblies, reducing flux loss compared to rectangular shapes.

Q2: Are Trapezoid Sintered NdFeB magnets suitable for high-speed motors?
Yes. When correctly specified for coercivity and temperature resistance, they are commonly used in high-speed rotating equipment.

Q3: Can the magnet grade be customized for different operating temperatures?
Yes. Different NdFeB grades can be selected to match operating temperature ranges and demagnetization resistance.

Q4: What tolerances are typical for trapezoidal magnets?
Tolerances depend on size and application, but precision machining allows consistent angular and dimensional control suitable for motor assemblies.

Q5: What surface treatments are available for Trapezoid Sintered NdFeB magnets?
Most products in this category use protective coatings such as nickel, epoxy, or zinc to reduce corrosion risks. Selection depends on operating temperature, humidity, and exposure conditions.

Summary

Trapezoid Sintered NdFeB custom magnets deliver high magnetic energy density and precise angular geometry for demanding electromagnetic assemblies. Designed for permanent magnet synchronous motors, wind power generators, magnetic couplings, and industrial automation, they provide optimized flux concentration and reliable performance in curved or segmented magnetic circuits.