SYSTEMS AND METHODS FOR VACUUM-ARC REMELTING FURNACE REGULATION, BASED ON SUPPLIED POWER Russian patent published in 2020 - IPC C22B9/21 

FIELD: metallurgy.

SUBSTANCE: invention relates to control of vacuum-arc remelting (VAR) of metal in vacuum-arc furnace. Proposed system comprises DC power supply, electrode feeder, feeder drive, drip short-circuit sensor and controller that includes processor. Drip short-circuit sensor is configured to measure frequency of drop-out of electric arc for a period of time. Controller is configured to determine in real-time arc gap length between electrode tip and melting bath, based on correlation between dropping short-circuiting frequency and arc gap length. Controller is configured to control the input power supplied to the electrode by the DC power supply by determining the input power level supplied to the electrode input, based on the arc gap length in real time, the input power level configured to generate the desired arc gap length, DC power supply source, at input power level. Invention covers also method of controlling vacuum-arc remelting in vacuum-arc furnace and furnace.

EFFECT: higher accuracy of feeder speed control at dynamic control and/or maintenance of arc gap with increased accuracy of arc gap adjustment.

14 cl, 4 dwg