Medium-frequency induction electric arc furnace and smelting control method

The invention relates to a medium-frequency induction electric arc furnace and a smelting control method, and belongs to the field of electromagnetic metallurgical equipment. The electric arc furnace comprises a flexible direct-current power supply device, a medium-frequency alternating-current power supply device, a series resonance capacitor bank, a change-over switch, a short net, a top cathode, a bottom anode, two sections of medium-frequency induction coils and a furnace body. The flexible direct-current power supply device heats furnace charge through the short net and a graphite electrode, and the medium-frequency alternating-current power supply device generates high-density magnetic force lines to smelt the furnace charge through the series resonance capacitor bank and the change-over switch by using the medium-frequency induction coils. After all the furnace charge is molten, the flexible direct-current power supply device and the medium-frequency alternating-current power supply device are matched