Overview
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An induction furnace is an electrical furnace in which the current is generated
within the metal by induction heating and the heat generated by the electric
resistance melts the metal.
The magnetic iron cores around the coil are used to protect the coil from
being damaged.
The magnetic iron cores also prevent the flux leakage so that the steel
sheet outside the iron cores will not be heated.
This note presents the used of magnetic field analysis to evaluate the
flux leakage from the magnetic flux density distribution of an induction
furnace with and without the iron cores. |
Magnetic Flux Density Distribution
|
Figure 1 shows the magnetic flux density distribution with and without
the iron core. The flux leakage of the furnace with iron core is lower
than that of the furnace without iron core. So the steel sheet outside
the iron core is protected from being heated. |
Joule Loss of the Molten Metal
| Figure 2 shows the Joule loss of the molten metal with and without iron
core. The Joule loss of the furnace with iron core is about 5% more than
that of the furnace without iron core. The molten metal is heated efficiently
with iron core. |
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