The results of the study of innovative systems of induction melting of metals associated with simultaneous power supply of the crucible furnace with high and low frequency currents are presented. The high-frequency cascade is the master during the operation of the inverter, and the low-frequency cascade is the slave. The use of such a furnace power supply scheme makes it possible to increase the efficiency of induction medium-frequency melting of metals and expand the technological capabilities of the furnace by controlling the movement of metal under the action of low-frequency currents.