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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 square ceramic ferrite magnet, magnetic grade is Y30, size is length 50mm, width 50mm, thickness 25mm, thickness direction magnetization. The place of production is Dongguan, China. It is mainly used for industry, machinery and equipment, and personal experiments, if you need it Please contact us to purchase this magnet, the minimum order quantity is 10 pcs....
As shown in the picture, this product is a half-ring segmented magnet, standard half-ring shape, 2 half-ring can be put together to form a circle, the material is rare earth neodymium, with super strong magnetism, according to the customer's requirements, this half-ring magnet in the inner diameter of the larger R angle....
Have you ever seen this 10-sided magnet? I guess not. This is a 10-bar circular hole magnet with magnetized thickness, produced by China magnet supplier Guowei Magnet. The material of the magnet is rare earth neodymium, which belongs to customized special neodymium magnet, which can be used in industry, mechanical parts and electronic parts. We can also process the neodymium strong magnetic in the size and shape you want according...
This sample is a semi-circular neodymium magnet, the performance grade is N40, the maximum working temperature is 80 ℃, the surface coating is nickel-copper-nickel, the appearance is silver-white, and the size can be customized. Industry experience, drawings and samples are customized according to industry needs, quality is guaranteed...
This product is wind turbine magnet, the material is rare earth neodymium, the shape is trapezoidal, fan-shaped, arc section, the surface is galvanized, there is also a hole processed in the magnet (countersunk screw holes), belongs to the customized shape of the motor class magnets, such as you have specific requirements, such as the size, performance, temperature and other requirements can be contacted to provide you with quotations, prototyping and other services....
This is an ultra-small ferrite block magnet, small and thin, with a thickness of only 0.8mm, a length of 3.8mm, and a width of 2mm. It is mainly used for precision electronics, Hall sensors, and is magnetized in the direction of 2. The strong magnetic surface is the length If you are interested in this kind of small ferrite magnets, you can contact us to customize without pressure!...
This is the courage magnet manufacturer to provide you with a anisotropy multi-pole ferrite ring magnet, through the side (radial) 12 pole magnetization, the surface magnetic is about 1050 gauss, its size is 28.4mm outer diameter, 17.5mm inner hole, thickness of 4mm...
This product is a ring-shaped ferrite magnet with an outer diameter of 20mm, an inner diameter of 10mm, and a thickness of 3mm. There is no coating on the outside. The magnetizing method is axial/planar 4 poles and the surface magnetic field strength is about 980gs. If you are interested in this magnet, please contact We provide you with samples, and other specifications are needed. We can also provide you with more magnetic poles....