Dec 01, 2004 · The heating coil is divided into eight zones 0332-1649 where the high frequency inverters are connected. The graphite is set just under the DOI 10.1108/03321640410553472 COMPEL 23,4 Figure 1. Induction heating equipment with zone control Figure 2. Analyzed model excitation coils and is heated by eddy losses produced by the exciting coils.