Shin-Etsu Rare Earth Magnets

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SPM motors (Surface Permanent Magnet Motors)

These are synchronous motors with rotating magnetic fields that have a shape formed by embedding magnets in the surface of the rotor. They use the strong magnetism of the magnets for good motor torque linearity and superior control. Optimizing the magnet shapes provides motors with low cogging torque. On the other hand, there are problem points, for example the brittleness of the glued structure. In recent years, because of their advantages for energy conservation, clean energy, etc., the application of surface permanent magnet motors is expanding. They are used in some electric cards and electric power steering and also in a variety of industrial motors.

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Glossary list