Engineered for high power density, extreme thermal stability, and maximum energy efficiency.
Permanent Magnet (PM) drives represent a pinnacle in industrial drive design. Unlike traditional induction motors that rely on electromagnetic induction to generate rotor flux, PM drives utilize high-coercivity sintered Neodymium-Iron-Boron (NdFeB) magnets embedded on or inside the rotor. This fundamental design variation removes rotor-side copper losses ($I^2R$), drastically reducing heat generation and pushing efficiency ratings past IE5 ultra-premium levels.
Our permanent magnet drive products are meticulously optimized for maximum torque density, low cogging torque, and reliable operation under thermal stress. By sourcing from a specialized company like Zhejiang Laysun Magnetics Ltd., global system integrators secure access to highly customized magnet topologies that are vital for precision control in servo motors, electric vehicle (EV) traction systems, and high-capacity wind turbine generators.
Sintered NdFeB permanent magnets deliver the highest energy product ($BH_{max}$) up to 52 MGOe, enabling compact motor designs with over 30% reduction in weight and volumetric footprint compared to induction units. Minimizing weight on dynamic rotors directly lowers inertia, improving responsiveness in high-frequency applications like robotic joint control and automotive Electronic Power Steering (EPS).
Thermal stability is a critical bottleneck in permanent magnet drives. Rare earth magnets undergo reversible and irreversible flux loss when operating temperatures exceed their maximum limits. In EV traction motors, for example, internal temperatures can exceed 150°C. To mitigate this risk, our sintered NdFeB blocks and arc segments are formulated with Dysprosium (Dy) or Terbium (Tb) heavy rare earth elements to bolster intrinsic coercivity ($H_{cj}$), enabling reliable performance up to 220°C.
| Magnet Grade Group | Remanence ($B_r$) [T] | Coercivity ($H_{cb}$) [kA/m] | Intrinsic Coercivity ($H_{cj}$) [kA/m] | Max Operating Temp (°C) |
|---|---|---|---|---|
| N35 - N52 | 1.17 - 1.48 | ≥ 876 | ≥ 955 | 80 |
| 35M - 50M | 1.17 - 1.43 | ≥ 876 | ≥ 1114 | 100 |
| 35H - 48H | 1.17 - 1.39 | ≥ 907 | ≥ 1353 | 120 |
| 35SH - 45SH | 1.17 - 1.36 | ≥ 923 | ≥ 1592 | 150 |
| 30UH - 40UH | 1.08 - 1.28 | ≥ 851 | ≥ 1989 | 180 |
| 30EH - 38EH | 1.08 - 1.25 | ≥ 820 | ≥ 2387 | 200 |
| 30AH - 35AH | 1.08 - 1.20 | ≥ 820 | ≥ 2785 | 220 |
Your trusted partner in the world of advanced magnetic solutions. Since our inception in 1999, we have grown to become a national high-tech leader in manufacturing rare earth magnets, a testament to our unwavering commitment to excellence in this niche field.
Our state-of-the-art production base in China scales over 100,000 square meters. Integrating research, sintering, machining, plating, and testing under one roof, we supply 5000+ tons of premium permanent magnets annually to multinational Tier-1 automotive and industrial OEMs worldwide. Our rigorous quality system guarantees stability across all supply chains.
How China's rare earth ecosystem provides strategic, commercial, and technical stability to global enterprises.
China is home to the world's most complete rare earth supply chain, controlling over 70% of mining and 85% of processing capacities. This geographic advantage shields our customers from international shipping disruptions and guarantees access to vital raw elements (Neodymium, Praseodymium, Dysprosium, and Terbium) at competitive rates.
At Zhejiang Laysun Magnetics, we utilize specialized helium-gas jet milling, strip casting, and dual-alloy mixing techniques. This is paired with multi-wire cutting equipment and robotic dimensional sorters to manufacture complex geometries (such as skewed rotor segments) with micrometer-level precision.
Our production facilities utilize modern waste-water recycling and lower-emission sintering processes. This ensures compliance with ESG initiatives while keeping up with international environmental and trace-element regulations (RoHS, REACH, and Conflict Minerals declarations).
Delivering reliable torque, precision feedback, and extreme durability in critical environments.
High-grade NdFeB magnets power high-torque frameless servo motors for collaborative robotic arms, allowing fast acceleration and micro-step positioning.
Extremely lightweight, high-energy ring magnets optimized for brushless DC (BLDC) drone propulsion systems, offering max flight time and safety.
High-coercivity (UH/EH grades) rotor segments built for EV traction motors and electronic power steering (EPS), designed to withstand 180°C operating temps.
Durable NdFeB cylinders and segments engineered for compact, battery-powered brushless drills, saws, and heavy industrial tooling.
Magsafe ring magnets, acoustic voice-coil arrays, and micro-actuators characterized by high magnetic concentration and minimal thickness.
High-efficiency magnets for inverter compressors in air conditioners, washing machines, and ventilation fans to lower household energy draw.
Explore our core product groups designed for target fields of modern magnetic engineering.
Engineered to international regulatory standards, with direct shipping networks to major global hubs.
Headquartered in Hangzhou, Zhejiang, and backed by a large factory in Sichuan, Laysun Magnetics manages a reliable shipping infrastructure to ensure fast delivery. We process exports through main sea hubs including Shanghai and Ningbo, and coordinate air cargo routing via Hangzhou and Pudong Airports.
Our production facility is verified under major industrial standards to ensure consistent dimensional and metallurgical quality. (API 6D, API 607, CE, ISO9001, ISO14001, ISO18001, TS/IATF 16949. If you need copies of our certificates, please contact our team).
Clear, direct technical answers to simplify procurement workflows and support motor engineering teams.
Submit your design specs or request quote documentation. Our engineering team responds within 24 hours.
Explore specialized industrial configurations, raw magnetic materials, and heavy lifting products.
Laysun Magnetics