BLDC Motor Multipole Hot Pressed Process NdFeB Rings Specifications:
Dimensions: Customized design drawing
Tolerances: +/-0.1 mm
Material: Compression Bonded NdFeB
Plating/Coating: black epoxy
Magnetization Direction: Diametrically (Poles on the curves)
Max Operating Temp: 160ºC (Degree Celsius)
Other: All magnets passed QC(Br. Flux.Dimensions) and 24-Hour Salt Spray Test.
Feel free to contact us for the inventory if you need the product urgently.
Magnet Application: Motors, Wind Power, Sensors, Computers and Peripherals, Magnetic Assemblies, Automotive, Motion Control, Aerospace, Research and Development, Communications, Medical Device and Diagnostics, Home appliance, Other magnetic applications or you can find new application according to your design.
Radially-oriented ring magnets are a unique subset of NdFeB bonded magnets. Using proprietary technologies, a multipole ring can be sintered into a truly radial geometry. This replaces the costly and labor-intensive method of gluing arcs, bread loaves or rectangular segments onto a rotor shaft.
MPCO Magnetics now offers high-efficiency multipole Neodymium (NdFeB) magnetic rings. These rings are revolutionizing the permanent magnet space for synchronous motors, stepper motors and DC brushless motors widely used in automotive, specialty electronics, and medical applications. Neodymium Rare Earth Magnet Ring Grade N45 OD1.26 x ID1/2 x 1/4″Thick
Magnets are pressed to produce sintered NdFeB magnets. This process consists of combining base powders, pressing the resulting material, and then baking or sintering the resulting ring to achieve a radially magnetized product.
Bonded Neodymium magnets are made of the powerful Nd-Fe-B material mixed into an epoxy binder. The mix is appropriately 97 vol% magnet material to 3 vol% epoxy. The manufacturing process involves combining Nd-Fe-B powder with an epoxy binder and compressing the mixture in a press and curing the part in an oven. Permanent Radiation Oriented Ring Magnets
Advantages:
1.Produced with high efficiency, stability and repeatability.
2.Magnet and other part may form together in one step.
3.Free choice of magnetizing direction-especially for multi-polar applications.
4.High dimensional accuracy-large quantity applications with minimum post-press machining.
5.Thin-wall ring and complex shape magnets.
6.High resistance to corrosion. 10-Poles Bonded NdFeB Diametrically Ring Magnet
Typical Magnetic Properties of Compression Bonded NdFeB Magnets
| Grade1 | Br Remanence | Hcb Coercive Force | Hcj IntrinsicCoercivity | Maximum Energy Product (BH)max | Application |
| BPN4 | 400~500mT | 240~360kA/m | 640~800kA/m | 29~48kJ/m3 | Holder Stationary |
| 4000~5000Gs | 3000~4500 Oe | 8000~10000 Oe | 3.6~6.0MGOe | ||
| BPN6 | 600~700mT | 360~440kA/m | 640~800kA/m | 48~64kJ/m3 | Holder Micro-motor |
| 6000~7000Gs | 4500~5500 Oe | 8000~10000 Oe | 6.0~8.0MGOe | ||
| BPN8 | 600~700mT | 400~480kA/m | 640~800kA/m | 60~72kJ/m3 | |
| 6000~7000Gs | 5000~6000 Oe | 8000~11000 Oe | 7.5~9.0MGOe | ||
| BPN8H | 560~650mT | 400~480kA/m | 960~1200kA/m | 60~72kJ/m3 | |
| 5600~6500Gs | 5000~6000 Oe | 12000~15000 Oe | 7.5~9.0MGOe | ||
| BPN10 | 650~750mT | 400~480kA/m | 640~800kA/m | 72~88kJ/m3 | |
| 6500~7500Gs | 5000~6000 Oe | 8000~10000 Oe | 9.0~11.0MGOe | ||
| BPN12 | 650~750mT | 400~480kA/m | 640~800kA/m | 80~96kJ/m3 | |
| 6500~7500Gs | 5000~6000 Oe | 8000~10000 Oe | 10.0~12.0MGOe |
Typical Physical Characteristics of Compression Bonded NdFeB Magnets
| Grade Unit | Density g/cm3 | Hardness HRB HRB | Temperature Coefficient %/°C | curie Temperature °C | Max Operation Temperature °C | Saturated Magnetic Field kA/m | Thickness Of Coating μm |
| BPN4 | 6.0~6.5 | 40~45 | -0.11 | ≥350 | 160 | 1600 | 5~30 |
| BPN6 | 6.0~6.2 | 40~45 | -0.11 | ≥350 | 160 | 1600 | 5~30 |
| BPN8 | 6.0~6.2 | 35~38 | -0.11 | ≥350 | 160 | 1600 | 5~30 |
| BPN8H | 6.0~6.2 | 35~38 | -0.12 | ≥300 | 160 | 2400 | 5~30 |
| BPN10 | 6.0~6.2 | 35~38 | -0.10 | ≥350 | 160 | 1600 | 5~30 |
| BPN12 | 6.1~6.4 | 35~38 | -0.10 | ≥350 | 160 | 1600 | 5~30 |
Note: The coating material can be chosen according to customer’s demand.
Compression Bonded Neo Ring Magnet Magnetization 8 Poles
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