POWER SOURCE FOR ARC FURNACE WITH RESONANCE CIRCUIT Russian patent published in 2023 - IPC H02M5/06 H02M5/12 H05B7/148 

FIELD: electrical engineering.

SUBSTANCE: invention is related in particular to a power supply system for an electric arc furnace, a method and a controller for controlling the power supply system. The power supply system (12) for the electric arc furnace (10) contains an AC input (20) connected to the electrical network (22), and an AC output (24) for powering at least one current electrode (14) of the arc furnace (10); a resonant circuit (46a, 46b, 46c) connected between the AC input (20) and the AC output (24). The resonant circuit (46a, 46b, 46c) includes a controllable bypass switch (60) for connecting and disconnecting a circuit input (56) and a circuit output (58) in the resonant circuit (46a, 46b, 46c) and a capacitor (64) and a main induction coil (66) connected in parallel with the bypass switch (60).

EFFECT: increased efficiency of the arc furnace power source

15 cl, 6 dwg