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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;
Product Name: Radial Multipole Magnet for Drive Motor，Product Specifications: Customized. [The outer diameter of this magnet product is 9mm]，Magnetizing direction: radially charging，Number of magnetizing poles: 10 poles，Coating: Black Epoxy，Magnetic force size: about 1100gs...
The key component of the magnetic pump is the magnetic coupling, which is mainly composed of inner and outer magnets, even if two are used. At present, the inner and outer magnets are mainly made of NdFeB or rare earth cobalt, and then there is ferrite. This sample It is also suitable for magnetic drive pumps, with radial 6-pole magnetization, and many customers choose 6 or 8 pcs neodymium arc magnets....
Product Name: Rectangular neodymium magnet block with adhesive back, Size: Customizable, 1mm thickness is common, Magnetizing mode: thickness, Price: According to your magnet specification, performance, purchase quantity, Type of back glue: 3M, sponge, others, Application: DIY refrigerator sticker, DIY sun curtain, fixed painting, fixed door curtain, storage and arrangement, fixed teaching AIDS, Crafts...
This product is an industrial mounting magnet, made of the strongest neodymium magnets, square in shape, punched with countersunk screw holes to mount where it is needed, these powerful mounting magnets are typically used to lift and hold magnets, including magnetic tool holders , component lifters, clips, latch magnets, universal magnetic racks, etc....
This sample is a square magnet with 2 countersunk holes (screw holes), the material is the strongest NdFeB, N45 grade, magnetized in the thickness direction, it is a customized magnet, it can be installed with screws where it is needed, strong mounting magnet except square, you can also choose rectangle, bar, circle, size, performance grade you can choose...
This is a new scheme that can replace the multiple pcs arc magnets of the fan motor. It consists of ferrite magnet (above Y30)+plastic coating process. The number of magnetic poles can be 10, 14, 16, and the outer diameter is about 110-160mm. It is mainly used for the fan motor. If you are interested in this product, please contact the customer service website to make a quotation for you....
In addition to buying magnets from lowes magnets and home depot, you could also choose our Chinese magnet manufacturer to make an inquiry and buy in large quantity. This 4.5x4.5x0.5mm magnet is a thin square magnet, which uses the high performance N52 grade of Neodymium Iron Boron to give it a strong magnetic force...
This is a ferrite bar magnet approximately 6 inches in length, with dimensions of 150×50×10mm. It is made from sintered ferrite material (Y30) and features excellent high-temperature resistance and stable magnetic properties....