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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 magnet ring is made of high-performance rare earth neodymium as the base material, with an outer diameter of 30 millimeters and a thickness of 6 mm, in a ring design. In terms of surface treatment, a nickel layer is first used as a base to enhance corrosion resistance and coating adhesion....
This 1/2-inch neodymium magnet is circular in shape and features a phosphated coating, offering excellent corrosion resistance, making it particularly suitable for applications in humid or harsh environments. It measures 12.5 mm x 3 mm and provides strong magnetic force...
This magnet is a ring-shaped neodymium magnet with radial 10 poles. The material is bonded NdFeB, the inner circle is magnetized with 10 poles, and the strong magnetic surface is inner circle. The size of the magnet is 32.6mm in outer diameter, 28.6mm in inner diameter, and 6mm in height....
This product is a square ceramic magnet, made of sintered ferrite anisotropy, with low remanence, low recovery magnetic permeability, and strong anti-demagnetization ability. 12mm, suitable for fitness equipment, massager, magnetic control machine, air pump, if you are interested in this product, please contact....
You are now viewing this is a super small (tiny) size ferrite block magnet sample, high performance grade Y30, magnet length 2.45mm, width and thickness are 1mm, magnetization direction along the length....
This product is a variety of isotropic ferrite (Y10) rotor magnets ring, which are processed and manufactured by the Chinese permanent magnet supplier Courage Magnet. The inner aperture size of the magnet is 5.4mm, and the surface is smooth and free of defects. It can be magnetized according to the number of magnetic poles required by customers, such as radial 2, 4, 6, and 8 poles...
This product is a float switch magnet, a float ring magnet, and the material is ferrite. Drinking system, etc.), industrial equipment (such as: air oil compressor, air cooler, drain, lubricating oil system), gardening equipment, medical equipment, beauty salon equipment, aquaculture and industrial water purification, sewage treatment system, automatic door control system, Automotive and other industries....
This product is a high-performance arc-shaped magnet. The material is the strongest magnetic material NdFeB. It has the characteristics of small size, light weight and high torque. It is especially suitable for high-end servo motors and brushless motors. It is widely used in industrial motors. , so that the brushless motor has the advantages of light weight, high efficiency, low noise, small speed error, etc....