Explore our high-performance magnet products optimized for precise industrial saturation current thresholds.
In high-performance permanent magnet manufacturing, the term magnetization current refers to the critical electric current pulse driven through an inductive coil setup to generate the hyper-intense external magnetic fields necessary to saturate rare earth materials like Sintered Neodymium-Iron-Boron (NdFeB).
To achieve complete magnetic alignment, the applied magnetic field (H) must exceed the intrinsic coercive force ($H_{cj}$) of the target material by a factor of 3 to 5. This requires precise management of the peak current ($I_{peak}$), pulse duration ($\tau$), and the discharge wave configuration. Zhejiang Laysun Magnetics Ltd. engineers proprietary magnetization fixtures that control high-energy discharge profiles down to microsecond increments, ensuring a zero-defect processing cycle.
Since our inception in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a visionary magnetic materials start-up into a global engineering pioneer. Specializing in high-performance permanent rare earth NdFeB magnets, we manage the entire value chain from initial alloy formulation and vacuum induction melting to precision slicing, custom magnetization current processing, and multi-layer corrosion protection coatings.
Our primary manufacturing hub spans over 100,000 square meters in the high-growth industrial cluster of Suining, Sichuan. Operating with a dedicated, highly trained workforce of 300+ professionals, Laysun Magnetics delivers an annual production capacity of 5,000 tons of premium NdFeB alloys. We maintain our corporate headquarters in Hangzhou, Zhejiang, positioning our strategic technical sales, and logistical operations adjacent to key global shipping lanes and major tech development parks.
Understanding how Laysun Magnetics optimizes the magnetization sequence for heavy-duty industrial applications.
Utilizing high-capacity storage banks to release pulse currents exceeding several thousand amperes in millisecond windows. This guarantees full saturation of complex multipole ring shapes without generating excessive thermal stress in the NdFeB alloy.
Every magnet geometry requires a unique electromagnetic footprint. We design custom inner-pole and outer-pole multi-stage magnetization coils using Finite Element Analysis (FEA) to align domain structures perfectly in radial, axial, and diametrical formats.
Every production batch undergoes strict flux-density monitoring. Pulse fluxmeters measure magnetic field contours dynamically, tracking magnetization current curves and peak amplitude consistency to exclude any under-saturated parts.
The global transition toward high-efficiency electrification has placed rare earth permanent magnets at the center of supply chain planning. Zhejiang Laysun Magnetics Ltd. provides an integrated solution to help global enterprises hedge supply risks and secure high-performance components:
| Performance Metric | Standard Sintering Magnetization | Laysun Optimized Pulse Current Process | Industrial Application Impact |
|---|---|---|---|
| Peak Magnetizing Field ($H_p$) | 2.0 - 2.5 T (Tesla) | 3.5 - 5.0+ T (Tesla) | Achieves deeper magnetic saturation, improving magnetic flux stability under load. |
| Temperature Rise ($\Delta T$) | > 45°C during discharge cycle | < 15°C via optimized waveform | Prevents micro-cracking and keeps magnetic properties stable during manufacture. |
| Flux Angular Deviation | < ±1.5° (degrees) | < ±0.5° (degrees) | Improves rotation symmetry and reduces torque ripple in high-speed electric motors. |
| Coating Durability | Standard galvanic plating | Multi-layer Ni-Cu-Ni or Epoxy barrier | Meets harsh salt-spray requirements (>1000 hours SST) for offshore wind turbines. |
Operating as an OEM magnet partner, Zhejiang Laysun Magnetics Ltd. meets strict global quality and environmental standards. We support localized operations through real-time engineering response, detailed localized field support, and complete material certification.
Our quality systems are fully certified to ISO9001, ISO14001, and ISO18001 (now ISO45001). Additionally, to serve critical industrial and petrochemical valves, actuators, and hazardous location motors, our manufacturing and material batches conform to API 6D, API 607, and CE guidelines. If your design team requires full material data sheets, RoHS declarations, REACH declarations, or specific TS testing documents, our team can deliver verified reports within 24 hours.
Fire-safe valve actuation compatibility
Quality management system standard
European market compliance certifications
Environmental management standard
How our custom-magnetized rare earth permanent magnets power modern, high-growth technology sectors.
High-pole-density NdFeB magnets provide the torque-to-weight ratios needed for precise joint control in multi-axis robotic arms. Our magnetization process minimizes cogging torque, ensuring smoother mechanical operation.
Modern drone propulsion motors require high rotor magnetic flux densities. Laysun’s light, high-coercivity magnets offer excellent thermal stability, allowing drone motors to run reliably under heavy loads.
From Electric Power Steering (EPS) units to high-torque drive motors, our sintered NdFeB blocks are designed to resist demagnetization under the high operating temperatures of automotive powertrains.
Brushless power tools benefit from compact magnetic layouts that deliver consistent mechanical output. Our magnets are engineered to withstand continuous mechanical shock and vibration.
We manufacture custom magnetic rings and arrays for consumer tech, including MagSafe charging structures. These components are optimized for high mechanical strength and corrosion-resistant finishes.
From compressor motors in modern air conditioners to pump drives in washing machines, our magnets help domestic appliances meet strict international energy-efficiency standards.
As modern systems prioritize power density, industrial magnets are moving toward complex magnetizations (such as Halbach Arrays) and high-coercivity, low-dysprosium formulations. Delivering these configurations requires advanced magnetization current profiles. The industry is moving away from static DC magnetizers toward multi-channel pulse discharge systems. These setups allow engineers to control magnetic fields along multiple axes simultaneously, reducing flux leakage and optimizing material performance.
We maintain a rigorous quality assurance program backed by accredited third-party international audits.
Quality Control Standard Certificate
Environmental Compliance Certificate
Occupational Safety System Certificate
Answers to common engineering queries regarding peak current, magnetic saturation, and supply configurations.
The necessary magnetizing current depends on the magnetic coercivity ($H_{cj}$) of the alloy, the geometry of the target magnet, and the design of the magnetizing coil. The coil must generate a peak magnetic field ($H$) that is 3 to 5 times the intrinsic coercive force of the magnet to ensure complete domain alignment and prevent under-saturation.
If the current pulse width is too wide, the copper windings within the magnetization fixture can overheat, causing thermal degradation of the insulation. Conversely, if the pulse width is too narrow, the field may not penetrate the interior of thick NdFeB blocks due to eddy current shielding. We optimize pulse widths (typically between 5 and 20 milliseconds) using finite element analysis (FEA) to balance heat management and field penetration.
Every production run undergoes strict quality control, including online magnetic flux measurements, dimensional checks using automated optical equipment, and magnetic moment verification. Our laboratory also runs accelerated aging tests, such as HAST (Highly Accelerated Temperature and Humidity Stress Test) and PCT (Pressure Cooker Test), alongside salt-spray exposure tests to verify coating performance.
We provide a range of advanced coating configurations, including electroplated multi-layer Nickel-Copper-Nickel (Ni-Cu-Ni), organic Epoxy barrier coatings, passivation coatings, and zinc plating. For extreme operating environments, we also offer aluminum-chromate chemical vapor deposition (IVD) and polymer coatings, which protect magnets in marine, automotive, and industrial chemical settings.
Yes, we supply both magnetized and unmagnetized magnets. For complex assemblies (such as multi-pole electric rotors or Halbach arrays), handling unmagnetized material is often safer and easier. In these cases, we supply the unmagnetized NdFeB segments and assist customers with magnetizing fixture designs for their assembly lines.
For actuators and valves operating in oil, gas, and chemical refineries, compliance with API 6D (valve design specifications) and API 607 (fire test standards) is critical. This ensures that the permanent magnets used in actuator feedback loops remain stable under fire conditions and high pressure, preventing failure in emergency shutdown situations.
Select from our verified line of magnets, optimized to meet demanding international OEM specifications.
Submit your design specifications, dimension tolerances, and magnetizing requirements to receive a response within 24 hours.
Laysun Magnetics