Explore the engineering precision and unmatched pull forces of our premium neodymium industrial magnet variations.
Understanding the vital role of magnetic stacking and segmentation in high-frequency modern engineering.
The global demand for high-performance Rare Earth NdFeB (Neodymium Iron Boron) Magnets has experienced an unprecedented surge, driven by the global transition toward sustainable electrification. Industries ranging from automotive drive units to megawatt-class wind turbine generators rely on Neodymium magnets to achieve maximum torque density and structural efficiency.
In high-speed rotational applications, standard solid block magnets face severe thermal management challenges. Eddy current losses generate excessive internal heat, causing irreversible demagnetization. To mitigate this critical physical limitation, modern magnetic designers rely on Stacking Neodymium Magnets—also known as segmented or laminated magnets. By stacking thin magnetic layers insulated from one another, high-frequency eddy current losses are minimized, preserving structural magnet integrity at operational temperatures exceeding 200°C.
The principle behind stacking neodymium magnets is straightforward yet demanding in manufacturing precision. In high-power motors, changing magnetic fields induce electrical currents within the conductive body of the magnet. These eddy currents run perpendicular to the direction of the magnetic flux, transforming valuable energy into thermal waste.
By dividing a single large magnet block into multiple stackable slices and joining them with high-temperature epoxy resin or proprietary insulation layers, the electrical resistance of the path increases. Consequently, the heat generated inside the magnet is drastically lowered. As a direct result, motors can run faster, cool more efficiently, and deliver sustained high-torque output over long life cycles.
Established in 1999, Zhejiang Laysun Magnetics Ltd. is a national high-tech enterprise at the forefront of rare earth magnet research, development, and high-volume manufacture. With more than two decades of industrial expertise, we have optimized our supply chain to provide high-grade sintered NdFeB solutions that support global decarbonization and automation.
Our primary manufacturing hub spans an extensive 100,000 square meters factory area in Suining, Sichuan. Operating under tight quality controls, our dedicated workforce of 300+ employees manages an annual output capacity of over 5,000 tons of rare earth magnets. From raw materials alloy melting to final precision machining and automated assembly, we ensure consistency across every batch.
Deploying tailored magnetic materials to meet extreme operating criteria across fast-evolving technical sectors.
Laminated stack magnets are vital in EV traction motors and Electronic Power Steering (EPS). They minimize eddy currents, allowing motors to achieve higher speeds without overheating.
Joint servo motors require precise positional control. Dynamic motor response is optimized with custom-machined block and segment NdFeB magnets that offer high magnetic density.
Brushless motors for drones demand ultra-lightweight power sources. High-grade cylinder and ring magnets reduce the required motor volume while maximizing flight efficiency.
Industrial generators use stacked arc-segment magnets to prevent thermal buildup, extending the lifespan of wind rotors and power-generation facilities globally.
Compact cordless drills and impact drivers utilize specialized NdFeB pot designs to ensure torque durability under continuous heavy loading conditions.
Miniature voice coil motors (VCM) and magnetic smartphone couplers utilize high-coercivity micro-magnets to support thin form factors and fast wireless inductive charging.
To produce stacking magnets capable of surviving extreme operating environments without demagnetizing, Zhejiang Laysun Magnetics implements advanced metallurgical routes, including Grain Boundary Diffusion (GBD) technology. By diffusing heavy rare earth elements like Dysprosium (Dy) or Terbium (Tb) selectively along the grain boundaries of the sintered NdFeB matrix, we dramatically improve the magnet’s intrinsic coercivity (Hcj). This targeted enrichment minimizes the overall use of expensive heavy rare earths while maximizing the thermal performance and cost efficiency of the final product.
Raw Neodymium magnets are highly susceptible to atmospheric oxidation. Our manufacturing facility utilizes state-of-the-art surface treatments to guarantee reliable long-term performance. Depending on your operational requirements, we offer multi-layer Ni-Cu-Ni electroplating, highly durable epoxy resins, corrosion-resistant passivations, and specialized rubberized codings for environments exposed to moisture, chemical solvents, or extreme marine environments.
Our quality system is verified by international industrial regulatory frameworks, ensuring zero-defect batch delivery.
Critical answers about mechanical tolerances, magnetic grades, laminations, and wholesale customization parameters.
High-grade segmented NdFeB arc pieces, block formats, and custom assemblies for EV drivetrains and power tools.
Laysun Magnetics