Product Description
The Super Magnet Segment Neodymium Motor Magnets are high-performance arc-shaped rare-earth magnets specifically developed for advanced electric motor applications requiring compact size, high torque density, and thermal resilience. Each segment is precision-ground to exact arc dimensions with tight tolerances (±0.05mm) to ensure consistent air-gap flux distribution and minimal harmonic distortion. The N50SH grade material incorporates heavy dysprosium to maintain coercivity at elevated temperatures, making it ideal for automotive traction motors, industrial servo drives, and high-speed spindle motors. With our fully integrated manufacturing chain – from strip casting and sintering to multi-axis grinding and Ni-Cu-Ni electroplating – we guarantee batch-to-batch consistency, low flux variation (±3%), and comprehensive certification to IATF16949, REACH, and RoHS for global OEM supply.
echnical Specifications
| Parameter | Details |
|---|---|
| Product Name | Super Magnet Segment Neodymium Motor Magnets |
| Magnet Grade | N50SH (High-temperature, high-coercivity) |
| Material | Sintered NdFeB with heavy Dy addition (≥ 6% Dy content) |
| Shape | Arc segment (Radial or parallel magnetization) |
| Dimensions (Custom) | Outer radius: 25–150mm; Arc angle: 30°–180°; Thickness: 5–30mm |
| Remanence (Br) | ≥ 1.42 Tesla (14200 Gauss) |
| Coercivity (Hcj) | ≥ 1592 kA/m (20000 Oe) – SH grade |
| Max Operating Temp | 150°C (SH grade); Optional up to 180°C (UH) or 220°C (EH) |
| Coating System | Ni-Cu-Ni Triple Layer (or Epoxy/PTFE for high-humidity environments) |
| Dimensional Tolerance | ±0.05mm (Grinding); ±0.1mm (Magnetization angle) |
Key Features & Applications
Optimized arc geometry: precision-ground segments ensure uniform air-gap flux distribution, reducing cogging torque and improving motor efficiency – a key benefit of the Super Magnet Segment Neodymium Motor Magnets for high-performance applications.
High-temperature stability: N50SH grade with heavy dysprosium addition maintains coercivity at 150°C, ensuring reliable torque output in EV traction motors and industrial servos.
Advanced magnetization: radial or parallel magnetization options available, with multi-pole patterns for sensorless motor control applications.
Typical applications: electric vehicle traction motors, industrial servo motors, HVAC compressor motors, wind turbine generators, and high-speed spindle motors.
Advantages
Premium raw material sourcing: we use high-purity NdFeB with controlled dysprosium content (≥6%) and no recycled material, ensuring the Super Magnet Segment Neodymium Motor Magnets maintain maximum energy product and intrinsic coercivity across operating temperatures.
Precision multi-axis grinding: our CNC grinding centers produce arc segments with ±0.05mm dimensional tolerance and surface roughness ≤ Ra0.6μm, reducing eddy current losses and ensuring accurate rotor assembly.
Comprehensive quality assurance: 100% inspection of magnetic flux, BH-curve, and coating thickness (X-ray fluorescence) – with traceable data for each production batch.
Global compliance: all magnets meet IATF16949 automotive standards, REACH, RoHS, and Conflict Mineral requirements, with full SGS test reports for export to EU, US, and Asian markets.
High-Precision Manufacturing
Neodymium magnets can maintain dimensional accuracy within ±0.05mm through advanced precision machining techniques including surface grinding and CNC cutting processes. This tight tolerance control ensures consistent performance in applications requiring precise magnetic field distribution and mechanical fit.
Packaging & Shipping
Each Super Magnet Segment Neodymium Motor Magnets is packed in custom-designed EPS foam trays with individual slots to prevent chipping and surface damage during transit. For large-volume orders, we use corrugated cartons with internal dividers and vacuum-sealed moisture barrier bags containing silica gel desiccants. We support both air freight (for urgent prototypes and small batches) and sea freight (for production volumes), providing complete export documentation, including HS codes, packing lists, and UN38.3 certification for magnetized shipments.
FAQ
Q: What is the maximum operating temperature for these motor magnets?
A: The Super Magnet Segment Neodymium Motor Magnets in N50SH grade are rated for up to 150°C continuous operation. For higher temperatures, we offer UH grade (180°C) and EH grade (220°C) with additional dysprosium content.
Q: Can you provide magnets with multi-pole magnetization for sensorless BLDC motors?
A: Yes, we offer multi-pole radial and parallel magnetization patterns. Please specify your pole count and air-gap requirements, and our engineering team will provide a customized magnetization fixture design.
Production Process
1.Raw material selection (high-purity NdFeB alloy + DyFe).
2.Strip casting and hydrogen decrepitation (HD).
3.Jet milling to fine powder (3–5 μm).
4.Oriented pressing in a magnetic field (≥1.8T).
5.Sintering, annealing, and aging heat treatment.
6.Multi-axis CNC grinding to arc geometry (±0.05mm).
7.Ni-Cu-Ni electroplating (automated barrel plating).
8.Full magnetization and BH-curve verification.
9.Flux density mapping and visual inspection.
10.Packaging in EPS foam trays and final quality release.