Types of Magnets Used in Motors, Generators and Actuators
Rare earth magnets (samarium cobalt and neodymium) or ferrite (ceramic) magnets can be used in magneto and automotive magnet applications. Rare earth magnets are usually 2 to 3 times stronger than ferrite or ceramic permanent magnets. In motors, this enables smaller and lighter motors with higher performance. Correspondingly, rare earth magnets are also more expensive than ferrite (ceramic) magnets. Samarium Cobalt Magnet Samarium Cobalt (SMCO) magnets were produced in the 1970s. Before NdFeB magnets, one of the advantages of using SmCo is that they are not easy to corrode and have better temperature resistance. This means that it can maintain its magnetic properties at extremely high or low temperatures. It is a good choice for applications with abnormally high or low temperatures. However, their power is slightly weaker than neodymium magnets. Its high magnetic strength, excellent temperature resistance and reliable performance without oxidation protection are ideal for high-temper...