Under normal circumstances, arc magnets are mainly used in permanent magnet DC motors. Unlike electromagnetic motors that generate magnetic potential sources through excitation coils, permanent magnet motors use permanent magnet materials to generate constant magnetic potential sources. The correct magnet will ensure that your motor or the pump operates most efficiently and provides the required torque, speed, and output, the shoe magnet for the pump (fluid handling) needs to have the desired coupling effect at the specified air gap, the liquid delivered by the pump will determine the required Coupling. And the arc magnet coating will be a key factor, especially for pumps with special liquids.
There is a strong "exchange coupling" between some electrons that are close to each other in ferromagnetism. In the absence of an external magnetic field, their spin magnetic moments can be "spontaneously" aligned in tiny regions. Arranged to form small areas of spontaneous magnetization. In unmagnetized ferromagnetic substances, although each magnetic tile has a certain direction of spontaneous magnetization and has great magnetism, the magnetization directions of a large number of magnetic tiles are different. The whole ferromagnetic substance is not magnetic. When the electro-ferromagnetic substance is in the external magnetic field, the volume of the magnetic tiles whose spontaneous magnetization direction is at a small angle to the direction of the external magnetic field expands with the increase of the external magnetic field and makes the magnetic tile's volume increase. The magnetization direction is further turned to the direction of the external magnetic field.
When choosing an arc magnet, you should choose the appropriate brand according to the working environment. The magnetic arc is usually mainly made of ferrite and NdFeB, ferrite is sintered and injection molded, while NdFeB has sintered and bonded Yes, there are also samarium cobalt magnetic tiles.
Then since it is arc-shaped, the proportions in the shape must be different, so there is a question. Where will the N pole and S pole of the arc-shaped magnet be? Their N and S poles depend on the magnetization method determined by the product requirements. Most motor magnets require paired magnetization for arc magnets, that is, 2 magnets, one magnet with an N pole on the outer arc surface and an S pole on the outer arc surface. In the inner arc, the other magnet is the S pole in the outer arc and the N pole in the inner arc.
