Industry News

We have launched an innovative solution to replace the traditional separate magnetic tiles used in fan motors. ✅ This solution adopts Y30 grade ferrite magnets +with plastic-coated technology. ✅ Supports 10-pole, 14-pole and 16-pole designs. ✅ Outer diameter of about 100-160mm. ✅ Both inner and outer diameters can be fully customized according to your requirements. 📌 Main Application: Industrial ceiling fan motors This optimized solution effectively saves copper wire usage and cuts silicon steel sheet costs by more than 30%, greatly improving your product cost-effectiveness and market competitiveness. 📩 Welcome interested customers to contact our online customer service for samples and official quotations! Email: shirley@gaumumagnet.com Website: www.gaumumagnet.com 话题标签#IndustrialFanMotor 话题标签#FerriteMagnet 话题标签#PlasticCoatedMagnet 话题标签#MotorCostSaving 话题标签#MotorAccessories 话题标签#ManufacturingSolution

In the motor industry, many still believe “High Performance = Rare Earth (NdFeB).” But facing volatile prices and supply chain risks, “Rare Earth-Free” solutions are already a commercial reality. Here are 3 successful cases of Ferrite adoption that every engineer and purchaser should know: 1. The Cross-Industry Benchmark: Gree Kaibang
Back in 2010, they launched rare-earth-free synchronous reluctance motors, now used in over 100 million variable frequency air conditioners. More impressively, this tech has scaled to main drive motors for commercial EVs (40-200kW), achieving IE5 ultra-premium efficiency. 2. The “Hidden Champions” in HVAC Compressors
Giants like Panasonic Wanbao and Rechi have proven that for units under 1.5HP, Ferrite VFD compressors can fully meet Tier 1 energy efficiency standards. When rare earth costs spike, Ferrite is the ultimate stabilizer. 3. The Tech Roadmap from Japan
Proterial (formerly Hitachi Metals) has already prototyped EV motors using only Ferrite magnets that meet power requirements. This proves that with innovative magnet placement and circuit design, the performance boundaries of Ferrite are constantly being pushed. 💡 My Takeaway:
The core challenge is no longer “Can Ferrite work?” but “How do we optimize magnetic circuit topology (like SynRM designs) to maximize its cost-performance ratio?” If you are exploring cost-down solutions or interested in Ferrite motor design, let’s connect! #FerriteMagnet 话题标签#RareEarthFree 话题标签#ElectricMotor 话题标签#CostReduction 话题标签#SupplyChain 话题标签#Engineering 话题标签#HVAC 话题标签#EV

In the rotor design of permanent magnet motors, magnetic arc segments are key components that directly determine magnetic field distribution and overall motor performance. Eccentric arc magnets (also known as eccentric magnetic tiles) are an optimized structure developed based on standard equal-thickness magnets. What is an eccentric arc magnet? Unlike concentric arc magnets, where the inner and outer arcs share the same center, an eccentric arc magnet has different centers for its inner and outer radii. This special geometry creates a gradually varying thickness across the magnet, from the thickest point to the thinnest point. This design is intentional, not a manufacturing defect — it is a precision-engineered magnetic circuit optimization. Main functions of eccentric ferrite arc magnets Produce a more sinusoidal air-gap magnetic field Reduce magnetic harmonics effectively Lower motor noise, vibration and cogging torque Improve running smoothness and efficiency Typical applications Eccentric magnets are widely used in high-performance motors where low noise and stable operation are critical: Inverter air conditioner compressor motors New energy vehicle drive & auxiliary motors High-speed, low-noise micro motors High-efficiency permanent magnet synchronous motors (PMSM) If you need custom eccentric ferrite arc magnets, rotor magnets, samples or quotations, welcome to contact us for professional support. 📩 shirley@gaumumagnet.com

Flywheel magnets are critical magnetic components in motors, generators, and small power systems. Their performance directly impacts efficiency, stability, and service life. Here are the 10 most common questions and answers for engineers and buyers. Q1: What is a flywheel magnet? A flywheel magnet is a permanent magnet mounted on a rotating flywheel (magneto rotor) to generate a stable magnetic field, widely used in small engines, generators, magnetic bikes, and garden machinery. Q2: What materials are commonly used for flywheel magnets? The main materials are ferrite magnets (cost-effective & stable) and neodymium magnets (high magnetic strength & compact size). Q3: What structures do flywheel magnets usually have? They are typically designed as arc-shaped segments or one-piece magnetic rings to fit different rotor diameters and pole requirements. Q4: How to tell if a flywheel magnet is damaged or demagnetized? Common symptoms include: Hard starting or unstable ignition Reduced engine power and poor combustion Insufficient generator output or weak lighting These are usually caused by magnetic loss or demagnetization. Q5: What is the function of flywheel magnets? They induce electromotive force by rotating relative to coils, supporting ignition and charging systems, and ensuring stable operation of engines and motors. Q6: How long do flywheel magnets last? With proper use (no overheating, no strong impact), high-quality flywheel magnets can last for years. High temperatures or harsh environments may accelerate demagnetization. Q7: Are all flywheel magnets the same? No. They vary in size, arc, pole number, magnetic grade, and temperature resistance and must be matched to specific applications. Q8: Can I replace only one damaged flywheel magnet? Technically yes, but full set replacement is recommended to ensure uniform magnetic field distribution and avoid vibration or abnormal performance. Q9: What temperature resistance is required? General motors: 80–120°C Gasoline engine flywheels: above 150°C High-temperature applications: 180°C+ Inappropriate temperature grades lead to irreversible demagnetization. Q10: Is stronger magnetism always better? No. Magnetic strength must match system design. Excessively high magnetism can cause signal distortion, increased losses, and unnecessary cost. If you need custom flywheel magnets, technical support or quotations, feel free to contact us.📩 shirley@gaumumagnet.com

Air-gap Magnetic Field Produced by 2-pole and 4-pole Magnetic Tiles Under Different Magnetization Methods In permanent magnet motors, multiple magnetic tiles (one tile per pole) are commonly used, mainly made of NdFeB or ferrite. The magnet is composed of 2 or even dozens of magnetic tiles. The commonly used magnetization methods include: 📌 Parallel Magnetization 📌 Radial Magnetization This paper focuses on the air-gap magnetic field generated by 2-pole and 4-pole magnetic tiles under the two magnetization methods mentioned above. 🔍 Case Study: 3 kW, 100 kr/min High-speed Motor ▶️ 2-pole Magnetic Tiles The figure below shows the air-gap magnetic field distribution waveforms under different magnetization methods: – Radial Magnetization: • Air-gap magnetic field: Close to a trapezoidal waveform • Fourier decomposition results: – Fundamental component: Only 91.2% of that under parallel magnetization – 3rd harmonic: 16.3% of the fundamental component – 5th harmonic: 3.8% of the fundamental component – 7th harmonic: 1.0% of the fundamental component • Conclusion: The 5th and higher-order harmonics are very small. ▶️ 4-pole Magnetic Tiles The figure below shows the air-gap magnetic field distribution waveforms under different magnetization methods: – Key Feature: The 5th and higher-order harmonics are negligible. – Parallel Magnetization: 3rd harmonic = 4.2% of the fundamental component – Radial Magnetization: 3rd harmonic = 6.2% of the fundamental component 💡 Critical Finding Compared with radial magnetization, parallel magnetization can increase the fundamental air-gap magnetic field by 26.7%. 📊 Final Analysis Parallel magnetization makes the air-gap magnetic field close to a sinusoidal distribution, and is beneficial to improving the fundamental component of the magnetic field and the effective electromagnetic torque. 📩 shirley@gaumumagnet.com