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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;
This is a multi-pole ferrite magnetic assembly, composed of injection molded ferrite + shaft, also known as injection molded ferrite magnetic rotor magnet, rotor OD 29.8mm, height 7.5mm, shaft 3.17mm...
Product Name: 6x6mm cylindrical neodymium magnet, Color: silver white, Manufacturer: courage magnet, N35 is about 4100 Gauss, and n52 is about 4800 Gauss, We have a great price advantage in the production of high-performance magnets. We look forward to your consultation!...
This product is a small magnet, made of neodymium with galvanized surface. How small are these magnets? 5mm, 8mm in length, 2mm in width, 2.5mm in width, 1mm in thickness, 1.5mm in thickness, if you are interested in such small neodymium block magnets, you can tell us the size you actually need, and...
You are now viewing a ceramic ferrite ring magnet with 60mm bore (center hole), 120mm outer diameter, 20mm thickness, medium to large size magnet, no plating on surface, especially suitable for speakers, horns, salvage, fishing, and mechanical equipment,...
Introduction of small size ring neodymium magnet; Product name: Nickel-plated strong neodymium small ring magnet，Performance level: N35 (can be customized for higher performance)，Product size: 8mm diameter, 2mm thickness, 4mm middle hole...
This is a thin rectangular block neodymium magnet, the specific specifications are length 40mm, width 25mm, thickness 1.5mm, strong magnetic force, N35 grade, magnetized in the thickness direction, suitable for ceiling lamps, crafts, home furnishing, electronic products, can be matched with 3M back glue to use....
This is a small size ring rare earth magnet, N38M grade, the outer diameter of the ring is 11mm, the hole is 2mm, which is also relatively small, the thickness is 5mm, the surface is plated with bright nickel, this type of magnet is suitable for passing through some thin shafts....
This is a very hot neodymium round magnet size, diameter 10mm, thickness 2mm, in many areas can be applied, the only difference is that different customers choose the coating, performance level and temperature resistance performance on the difference, the magnet weighs about 1.2g....