RU95104699A - Device for control of arc-heated plasma chamber operating duty - Google Patents

Abstract

FIELD: electrical engineering, plasma metallurgy, plasmochemistry, control systems of arc-heated plasma chambers. SUBSTANCE: the device uses an adjustable power source connected to a three-phase semicontrolled diode-thyristor rectifier with a diode cut in its each phase intended for connection to the arc- discharge exciting circuit, between the cathode and anode, starting duty and arc-discharge excitation control unit using the coils of automatic cutouts, delay lines and intended for switching of the starting electrode and interelectrode insert with subsequent switching of the plasma generator anode via the cut-in thermal relays, whose control contacts are cut in the supply circuit of the coils of automatic cutouts. EFFECT: enhanced reliability of arc-discharge starting, expanded range of operating duty control and increased service life of electrodes. 4 cl, 2 dwg

Claims (1)

Usage: in electrical engineering, plasma metallurgy, plasma chemistry, in control systems for electric arc plasma installations. The inventive device consists of an adjustable power source connected to a three-phase semi-controlled diode-thyristor rectifier with a diode introduced into each phase, designed to connect an arc discharge circuit between the cathode and anode in the excitation circuit, and a control unit for starting operation and excitation of the arc discharge, containing coils of circuit breakers, a delay line, designed for switching the starting electrode and the electrode insert with subsequent switching of the anode of the plasma torch introduced through thermal relay contacts which control circuit included in the power coils of circuit breakers, provides reliable start arc discharge, expansion of the operating mode of the control range and increase resource electrodes.