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Influence of Some Parameters on the Effectiveness of Induction Heating

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2 Author(s)
Tsopelas, N. ; Dept. of Mech. Eng. & Aeronaut., Univ. of Patras, Patras ; Siakavellas, N.J.

We have investigated the effectiveness of heating conductive plates by induction in low frequencies analytically and numerically, in relation to the shape of the plate, the area of the region exposed to the magnetic flux, and the position of the exposed region with respect to the center of the plate. We considered both uniform and nonuniform magnetic fields. For plates with equivalent area exposed to the same uniform magnetic flux, the one with the most symmetrical shape is heated most effectively. If a coil is employed for the excitation, the results depend on the shape of the plate, the shape of the coil section, and the coil lift-off. When only the central region of a plate is exposed to a variable magnetic flux, there is a specific value of the exposed area for which the power dissipated in the plate material reaches a maximum. The most effective heating of a plate partially exposed occurs when the axis of the exciting coil is at the plate center.

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Magnetics, IEEE Transactions on  (Volume:44 ,  Issue: 12 )