What is Multi-Pole Magnetization?

Multi-pole magnetization refers to the process of magnetizing a single sintered NdFeB (Neodymium Iron Boron) magnet with multiple alternating north (N) and south (S) poles on its surface. Unlike traditional single-pole magnetization (only N/S poles), multi-pole magnetization enables more complex applications, such as brushless motors and precision sensors.

Key Technologies of Multi-Pole Magnetization

1. Pulsed Magnetic Field Magnetization
High-current instantaneous discharge generates strong pulsed magnetic fields (8-20kA), ensuring the magnet reaches full saturation.

2. Special Magnetizing Fixtures

Pure iron pole tips improve magnetic flux penetration.

Multi-layer, low-turn coil design matches core saturation voltage, reducing energy loss.

3. Double-Sided Multi-Pole Magnetization
Symmetrical magnetizing heads enable simultaneous magnetization on both sides, enhancing field uniformity.

Applications

Motor Systems: Brushless motors, servo motors (improves torque density).

Electronics: Hard disk drives, micro-speakers.

Medical Devices: MRI magnets, precision instruments.

Technical Advantages

Energy Efficiency: Reduces magnet usage and optimizes motor performance.

High Precision: Suitable for complex magnetic circuit designs.

Enhanced Stability: Improved high-temperature stability via material optimization (e.g., Dy/Co doping).

Advancements in multi-pole magnetization are driving high-performance magnet applications in renewable energy, automation, and beyond.