BLDC Motor Magnets ：Arc Segment vs Block vs Ring ——Which Geometry Works for Your Rotor？
The magnet geometry you choose for a brushless DC (BLDC) or permanent-magnet synchronous (PMSM) rotor is one of the earliest and most...
Read ArticleXHMAG Technical Blog
Engineering guidance, grade selection, export compliance, and quality documentation for NdFeB magnet procurement.
Grain Boundary Diffusion（GBD）Technology Explained：How It Achieves High Hcj Without Dy/Tb
Coercivity (Hcj) is what keeps a permanent magnet stable when the temperature climbs. In a traction motor at 150 °C, or a...
Read Article
What Should Be in Every NdFeB Magnet Shipment Document Package？
A magnet shipment rarely gets held at customs because of the magnets themselves. It gets held because one document in the package...
Read Article
How China’s April 2025 Dual-Use Export Controls Are Reshaping Global Magnet Supply Chains
Introduction On April 4, 2025, China’s Ministry of Commerce issued Announcement No. 18, imposing export licensing requirements on seven medium and heavy...
Read Article
Magnets for Elevator Traction Motors: Grade Selection, Thermal Stability and Export Considerations
Elevator traction motors run continuously, often in mechanically demanding environments with elevated ambient temperatures and strict duty cycles. For engineers specifying permanent...
Read Article
PrNd Price Trends 2026: What’s Driving Rare Earth Costs — and What It Means for Your Next Order
NdPr oxide — the core raw material in every NdFeB magnet — opened 2026 at ~$53/kg, climbed to ~$138/kg by late April,...
Read Article
How to Read a NdFeB Demagnetization Curve: A Practical Guide for Motor Engineers
The NdFeB demagnetization curve tells you everything your datasheet summary omits — how much flux you actually get, exactly where the magnet...
Read Article
Why Your NdFeB Magnets Are Cracking During Assembly — and How to Fix It
A cracked magnet on the line is one of the most expensive failures in motor, sensor, and power-tool production. It scraps the...
Read Article
NdFeB Magnet Coatings Compared: NiCuNi, Zinc, Epoxy, Phosphate and Parylene — How to Choose
Coating selection doesn’t get as much attention as grade selection, but it probably should. We’ve seen motor customers switch grades three...
Read ArticleNeed Technical Guidance for Your Application?
Submit your motor type, working temperature, and current grade. Our engineers will respond with a grade recommendation and BH curve data within 24 business hours.
Request Technical Quote