General motor magnets for tile magnets, also have a circular or trapezoid. They are used in different motors, so they take different shapes. For example, permanent magnet motor or AC /DC motor, linear motor, brushless motor, etc. People usually use motor magnets and the attraction and repulsion of motor magnets to drive. In general, a ring is formed by a radially symmetric magnetized magnetic tile. Sintered NdFeb is an anisotropic material. Making complex magnetization directions is therefore more difficult. At present, there are also sintered NdFeb magnetic tile magnetic radiation magnet, but the size and brand limitations, magnetic properties are extremely unstable, consistency is very poor. At the same time, die coils and magnetizing jigs are very expensive.
In a motor, the coil is energized to produce a magnetic field. The energized conductor coil is also called an electromagnet. The positive and negative poles of a magnet repel and attract opposite poles of an electromagnet. Therefore, a magnet is needed, otherwise, if the energized conductor coil is not stressed, the motor will not turn. Because the magnet is the core part of the whole machine, most of the medium and large motor use NdFeb, some special purpose motor also use samarium cobalt magnet. In addition, some performance requirements are not high motor will also use ferrite magnetic tile. Normal electric rotor motor is nickel plated or epoxy resin neodymium magnet, the average temperature needs to be about 120°C, and ferrite and samarium cobalt can reach about 400°C high temperature resistance, but relatively speaking, in addition to high temperature resistance, other directions are better than samarium cobalt and ferrite.
