Induction heating plants are widely used in indus try to heat metal before hot working, i.e., punching, forming, and compacting. Induction heating yields a high quality of the process and, for many cases, is fairly effective. However, the efficiency of the induction plant is found to be very low during the heating of non magnetic materials with low specific resistances (alu minum, copper, brass). At present, enhancing the energy efficiency of the induction plants is only possi ble based on principally new approaches to developing electromagnetic induction field excitation systems. In particular, they [1, 2] propose to rotate a billet in a transversal magnetic field formed by the direct current of super conducting coils. The total efficiency of heating is determined by the losses in a motor and can reach 90%. The central failure of the heating plant is the need to maintain a low temperature of inductor coils to achieve a superconducting state. Plants in which the heated billet is rotated within a magnetic field of permanent magnets of intermetallic compounds based on rareearth metals lack this disad vantage . An example of this plant is shown in Fig. 1. An analysis of domestic and foreign sources shows that the investigations of electromagnetic phenomena in induction heating plants with permanent magnets are still in the initial stage. In connection with this, the study of electromagnetic induction heating fields within the plants is very important.