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The magnet in the brushless motor is installed on the rotor and is one of the important parts of the brushless motor. So what requirements does the brushless motor have for the magnet? For example, magnetic performance requirements, shape, number of poles, etc., let me introduce to you today.
Where are the brushless motor magnets located?
Magnet performance requirements for brushless motors
The brushless motor mainly uses high-performance rare earth NdFeB magnets. Because the power of the motor is closely related to the performance of the magnet, it can be basically understood that the volume and grade of the neodymium magnet determine the maximum power of the motor.
Magnet Shape Requirements for Brushless Motors
The shapes of brushless motor magnets mainly include square magnets, tile-shaped (arc) magnets, ring magnets, and bread-shaped magnets.
Advantages of square-shaped magnets: simple processing, relatively cheap price, and a good choice for motors that pursue cost.
Advantages of arc magnets: The arc can ensure that the air gap between the magnet and the silicon steel sheet is always consistent, and it seems that the power and efficiency are better than the square magnet.
Advantages of bread-shaped magnets: According to professionals, they believe that this type of magnet is more effective than arc-shaped magnets.
Ring magnet advantages: easy installation, superior performance, high-end general use ring!
Number of magnet poles required for brushless motors
Common magnet types of brushless motor magnet;
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....
This product is a bowl-shaped magnet, because its shape is like the rice we eat. It is processed into a concave shape on the basis of a circular magnet, which belongs to the special-shaped magnet category. Our company is good at processing various complex special-shaped neodymium magnets. Welcome to all over the world. Customer service....
This is a ring magnet with an outside diameter of about 2 inches, belongs to medium size, made of rare earth neodymium material, the hole in the center is 40mm, thickness 5mm, the customer chooses N38 grade,...
Product is a Y30 (C8) grade round ferrite magnet, the N pole has a pit, the surface magnetic field strength is about 1300 Gauss, the specific size is 18mm in diameter, 8mm in thickness, magnetized in the thickness direction, and the tolerance is ±0.1mm....
You are now browsing this is a 4 inch ceramic ferrite ring magnet, by the courage magnet manufacturers physical samples photographed, magnetic ring outer diameter 110mm, hole 50mm, thickness 6mm....
You are now browsing this magnet is the diameter of 80mm series of round rare earth magnets, the thickness of 10mm, nickel-plated surface, the thickness of the magnetization....
We can provide various sizes of thin rectangular neodymium magnets, ultra-thin round magnets, ultra-thin square magnets, with high dimensional accuracy, stable performance is not easy to demagnetize, welcome to contact us for a quote....