What are the shapes and advantages of NdFeb motor magnets?

     For the manufacture of motors, high temperature resistant Ndfeb magnet has a very important impact on the overall performance and efficiency of the motor. However, it is also important to elect magnets of the right shape and size.                                                                                                                                                                                                                                                    

     Usually arc, ring, round,trapezoidal, horseshoe, rectangle, etc. are used as motor magnets. The following are the advantages of three shapes:

1. Curved magnet 

   Since the sintered Ndfeb neodymium magnet is an anisotropic magnet, it is very difficult to make them into a complex magnetization direction, but the curved magnet can form a radial ring, so it is used as the first choice for DC motors. At the same time, the curved magnet will bring the magnet closer to the stator, which can reduce the air gap and increase the flux, and the stability will be better.                                                                                                                                                               

2. Ring magnet 

   Theoretically, radially magnetized ring magnet is the best shape for motor magnets, with advantages such as easy assembly, good stability, a variety of magnetized squares, uniform magnetic field distribution, excellent electrical function, etc., but limited by magnet materials and manufacturing processes, the cost of radially magnetized ring sintered neodymium magnets is expensive, because it requires additional magnetizing fixtures and coils. Size and grade are also usually limited.           

3. Trapezoidal magnets 

   Trapezoidal magnet is another common choice. It can be easily stacked or arranged into arrays to provide the desired magnetic field distribution. The plane of the block magnet allows for efficient magnetic coupling with other components in the motor assembly. In addition, the cost is cheaper than the former magnets.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       In short, different shapes of neodymium magnets have specific advantages that can be used to optimize motor performance in different applications.