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Determination of the Effective Impedance of a Cylindrical Induction Heating Device Excited by Rotary Magnetic Fields
Abstract:In this paper mathematical modeling of circuit parameters that feature the electric performance of a traveling-wave heating induction device is carried out. Rotary magnetic fields are the excitation source, and they come from axial windings having one pair of magnetic poles. The method employed for obtaining impedance parameters is based on main magnetic flux decomposition to partial fluxes along different regions that comprise the assembly. The modeled parameters are compared to those estimated from measurements of an experimental device at 60 Hz. Trials on both magnetic and non-magnetic load showed deviation between theoretical and measured parameters around 7%.
Keywords:Eddy currents  Electric furnace  Induction furnace impedance  Induction heating  Traveling wave
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