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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;
You are now seeing the specifications of this magnet ring OD 13mm, bore diameter 8mm, thickness of 3.5mm, the surface of the black epoxy, due to the reason of the photo may look like a ferrite, the actual bonded ring magnets, suitable for a variety of types of motor, sensor, and electric appliances....
Neodymium iron boron is divided into sintering, bonding and injection molding according to the different production processes. The general neodymium arc magnet is sintered, also called sintered arc neodymium magnet. Today this product is a bonded arc magnet that is not much used. The difference between sintered arc magnets is that bonded NdFeB magnet tiles require molds to produce....
Courage magnet manufacturers in China specialize in the production of various specifications of NdFeB strong magnetic tiles, large-radian strong magnetic tiles, large-sized arc magnetic tiles, arc-shaped sector magnets, and you are welcome to consult the arc-shaped magnets for quotation and proofing....
You are now browsing this ring for bonded neodymium magnets, gray epoxy on the surface, outer diameter 8mm, diameter of the hole is 4.5mm, height 6mm, it's mainly used in the field of electric motors, if you need other specifications, please consult us....
The sample shows a chemical nickel coated NdFeB small cylindrical magnet with N42 grade of magnetic properties, requires magnet N pole scribe marking, 2mm diameter, 2mm thickness, axial magnetization, the difference with conventional nickel is not obvious from the appearance but it is more suitable for use in wet, acidic or alkaline environments....
This is a small and thin (flat) round countersunk magnet, diameter 8mm, thickness is only 2mm, you see the countersunk hole neodymium magnets are generally about 3mm thick, so it belongs to the thinner countersunk hole magnets, if you want to be thinner it is difficult to process, for the customization of this type of magnets we are very good at,...
N42SH grade radial hollow cylindrical magnet 6.3x3x11mm for high speed motors...
This product is a T-shaped strong magnet, the material is rare earth NdFeB, it is a custom-shaped irregular Nd magnet, the sample is N52 grade, the surface is nickel coated, mainly used for connectors, electronic products, medical equipment, the maximum working temperature It is 80 degrees Celsius. If you need to use it in a high temperature environment, you need to replace the temperature resistant material....