0769-23388351
Toggle Navigation
Today, when I was visiting a motor forum, I found that a netizen asked how to choose the magnetic steel of the brushless DC motor? What are the effects of the remanence, coercive force and magnetic energy product of the magnetic steel in the brushless DC motor on the performance of the magnetic steel? Then there is how to select the correct magnetic steel performance parameters according to the conditions of the motor. If the parameters such as remanence are the same, what is the difference between ferrite and rare earth?
This is almost the case. In the magnetic steel, the residual magnetism br refers to the magnetic induction intensity of the magnet at this time after the magnetic field is magnetized to the technical saturation under the action of the external magnetic field of the magnet. ) Intrinsic coercive force HCJ refers to the reverse magnetic field strength required to reduce the magnetization of the magnet to zero, (whether the magnet can continue to work at high temperature and how much temperature it can withstand, mainly depends on HCJ) Magnetic energy product (BH) max refers to the product of B and H at any point in the demagnetization curve, and the maximum value of BXH is called the maximum magnetic energy product. (Comprehensive parameters, the selection of magnetic steel mainly depends on BR and HCJ)
What kind of magnet should the bldc motor choose?
This mainly depends on the comprehensive consideration of your application field, power, maximum operating temperature, and even original design experience, Generally, more neodymium arc magnets are used.
What is the difference between ferrite and rare earth magnets?
Both ferrite and rare earth neodymium magnets belong to permanent magnets. Permanent magnets are a general term. Sintered ferrite magnets, injection molded ferrites, sintered NdFeB magnets, bonded NdFeB magnets, etc. are all types of permanent magnets. The magnetic properties, plasticity, machinability and economy of various materials are different, depending on how you choose.
The above motor magnets can be customized by our company. Customers with drawings are welcome to send drawings to our business for quotation, and look forward to your consultation.
Brushless motors may also use the following magnets;
This is a very small rectangular ferrite block magnet, measuring 2.45 mm in length and 1 mm in both width and height. It is magnetised along its length and is barely noticeable when held in the hand....
7.4x6x5mm Ferrite Small Block Magnet Introduction，Material: Hard Ferrite (Ceramic)，Shape: Block / Rectangle / Bar，Coating: No Coating，Grade (Chinese Stardard): Y30，Operating temperature: -40°C to 250°C，Delivery time: 7-15 days，Magnetization direction: thickness....
U-shaped neodymium magnets are a type of high-performance permanent magnet material with a structure resembling the letter ‘U’. Manufactured from sintered neodymium-iron-boron, they are characterised by high magnetic energy product....
This is a radial 4-pole ring (Hollow cylinder) magnet, the material is bonded NdFeB, with high magnetic performance, the size is 16mm outer diameter, inner hole 5mm, height 20mm, surface gray epoxy treatment, suitable for water pump motor...
This product is a 4-pole ring magnet, injection-molded ferrite material, the sample size is 22mm outer diameter, 7mm inner diameter, 4mm thickness, 2 N poles and 2 S poles, mainly used for push rod motors, magnetic induction devices, encoders, etc.,...
This is a radial 2 pole circular magnet designed specifically for magnetic encoder chips. It is made of sintered neodymium-iron-boron with N35 grade performance and is suitable for standard environments....
This product is a multi pole magnetic ring with an inner diameter of 1.5mm. The material is injection molded ferrite. It adopts axial multi pole magnetization and is mainly used for DC motors. If you have a sample of similar injection molded magnetic products, please contact us for quotation....
This is a very small size rectangular block magnet with galvanized surface, 3mm length, 1.5mm width and height, with very fine tolerance, magnetized by lengthwise direction, mainly used in precision electronics, instrumentation, please contact us if you need to buy....