Eddy
currents are currents induced in conductors when exposed
to a changing magnetic field due to relative motion of the field source
and conductor; or due to variations of the field with time. This can
cause a circulating flow of electrons within the body of
the conductor. These circulating eddies of current have inductance and
thus induce magnetic fields. These fields can cause repulsive,
attractive,propulsion and drag effects. The stronger the applied
magnetic field, or the greater the electrical conductivity of the
conductor, or the faster the field changes, then greater the
currents that are developed and the greater the fields produced.
Eddy currents, like all electric currents, generate heat as well as electromagnetic forces. The heat can
be harnessed for induction heating. The electromagnetic forces can be used for levitation, creating movement, or to give a strong braking effect.
Eddy currents can also have undesirable effects, for instance power loss in transformers.
Eddy currents, like all electric currents, generate heat as well as electromagnetic forces. The heat can
be harnessed for induction heating. The electromagnetic forces can be used for levitation, creating movement, or to give a strong braking effect.
Eddy currents can also have undesirable effects, for instance power loss in transformers.
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