Rare Earth Magnet Basics / Glossary of Magnet Terms / Eddy current

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Eddy current
Induced eddy current generated in a conductor by the magnetic flux changing in that conductor (for example aluminum, copper, or other metal). It was discovered by the French physicist Léon Foucault. When an induced current is generated, this becomes an eddy current that generates a magnetic field that impedes change in the magnetic flux and ultimately kinetic energy is converted into heat, creating loss in various electromagnetic motion conversion devices. The amount of heat thus generated is called the Joule heat. The generation of Joule heat by eddy current is a cause of reduce efficiency for motors and other electromagnetic motion conversion devices. On the other hand, it is used as a heat source in electromagnetic cookers etc.
  • Rare Earth Magnet Basics
  • About Rare Earth Magnets
  • Magnetization Methods and Characteristics
  • Magnetic Evaluation Test

Glossary list