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We all know that magnets are commonly used on motors, but the magnets used by different motors are not only different sizes, but also different shapes. The basic shapes are arc/wedge/bread-shaped, rectangle, ring and flat block shapes, Let's talk about their respective characteristics.
Motor arc magnets, also often referred to as tiles shape magnet, segment shape magnet, wedge shape magnet, bread magnet, etc.
Curved segment magnets are the most commonly used magnet shapes for electric motors, especially for DC motors and magnetic rotors. The curved magnet will bring the magnet closer to the stator. So it can reduce the air gap and increase the flux between them. In addition, it also has the effect of reducing vibration and noise.
Below is a image of ferrite arc magnet used in motor:
Motor ring magnets
In theory, a ring magnet is the best shape for a motor magnet. More precisely, these rings are radial toroidal motor magnets. They have many of the following advantages:
1. Easy to assemble
2. Good stability
3. Better geometric accuracy
4. Excellent motor performance
5. A variety of magnetization directions
6. The magnetic field is evenly distributed
However, due to the limitation of material properties and manufacturing process, not all magnets can be made into radially oriented rings. There are two main radial ring magnets. One is a bonded neodymium magnet and the other is a sintered neodymium magnet.
Molded magnets are designed for different motors such as pump motors, vacuum motors, gated motors, stepper motors, brushless motors, DC motors, starting motors and conveying motors. They are made by hot extrusion and deformation.
Compared with sintered neodymium magnets, injection molded ferrite magnets, samarium cobalt magnets or injection molded neodymium magnets have advantages in terms of control accuracy and yield. They are the most flexible permanent magnets and can be magnetized in a variety of ways to make different complex shapes. But the magnetic field is much lower than the sintered chin-iron boron magnet.
Sintered NdFeb magnets can also be made into radially magnetized magnetic rings. But the cost is very expensive because they require additional magnetizing clamps and magnetizing coils. There are also many limitations on size and grade.
Below is a image of NdFeb ring magnet:
Flat (trapezoidal and rectangular) shapes are another common choice for motor magnets. Flat shape is easy to process for motor magnet manufacturers. This means lower costs than segment motor magnets.
The above is an rough introduction to the shape types and advantages of electric motor magnets. As a permanent magnet manufacturer, we also have various types of neodymium motor magnets and ferrite motor magnet ring/arc/Squre to choose from. If you have needs, please contact us.
Motor magnet products please click:
This product is a radial 8-pole rotor magnet. The material is injection-molded ferrite. The surface has no special treatment. At present, our company can provide injection-molded magnetic products with various properties, including injection-molded ferrite, injection-molded NdFeB and injection-molded ferrite....
Buy motor radial magnetized ring magnets, courage magnet mold, provided today is a radial 8 pole ceramic ferrite magnetic ring, the inner circle (inner diameter) for the use of strong magnetic surface, sintered ferrite material, magnetic ring specification outer diameter 40.3mm, inner diameter about 28mm, height 16mm, surface magnetic strength 1205 Gauss,...
This is a thin strip magnet made of rare earth neodymium iron boron. It was photographed and uploaded by Courage Magnet manufacturer. For this kind of strip magnet, we can process it thinner than 1mm, such as 0.45mm, 0.5mm, 0.6mm, 0.65mm, 0.7mm, 0.8mm thick....
Have you ever seen such a small ferrite rectangle/block magnet? This is a ceramic ferrite magnet of 2mm in length, 1.5mm in width and 2mm in thickness, with black surface and Y30BH grade. It is suitable for all kinds of electronic parts, precision electronics and medical products requiring magnetism. If you are processing small, thin and flat ferrite permanent magnet suppliers, we will be a good choice for you....
This product is a magnetic encoder disk designed specifically for encoders. It features a ring-shaped design made of rubber-ferrite material with a dual-ring magnetization structure, available in 64-pole and 62-pole configurations. The specifications are: outer diameter 29 mm, inner diameter 15 mm, and thickness 1.1 mm....
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Our company is a permanent magnet supplier from China. We are good at processing micro-precision magnets, high-performance magnets, special-shaped magnets, and multi-pole ring magnets. The quality is guaranteed and the price is not expensive. We look forward to customer consultation from all over the world....
The sample is an N52 high-performance ultra small hole radially sintered neodymium rotor magnet, with specifications of 2mm outer diameter, 0.9mm bore, and 4.5mm height....