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Induction heating (Magnetodynamics)

Magnetic induction, eddy current and temperature distributions

Magnetic induction, eddy current
and temperature distributions

When a conductor is placed in a variable magnetic induction, eddy currents appear at its surface (and in a depth depending on the frequency of the excitation current, on the electric conductivity and on the magnetic permeability of the material). These currents cause power dissipation by joule effect and an increase in the conductor’s temperature. The aim of this example is to heat one tooth of a milling cutter for maintenance purposes. An inductor submitted to a sinusoidal electromotive source is placed close to the tooth we want to heat. It generates eddy currents in the milling cutter and consequently a local heating.