Magnetic Materials in Permanent Magnet Motors
Permanent magnet motors use permanent magnets to generate the magnetic field of the motor. It does not require an excitation coil or excitation current. It is a good energy-saving motor because of its high efficiency and simple structure. With the rapid development of various motors and the invention of current magnetizers, people have conducted in-depth research on the mechanism, composition and manufacturing technology of permanent magnet materials. A variety of permanent magnet materials such as carbon steel, tungsten steel, and cobalt steel have been discovered one after another. The magnetic material used in permanent magnet are neodymium iron boron, samarium cobalt and ferrite.