| 摘要 |
FIELD: electricity.SUBSTANCE: plasmatron power source includes three-phase bridge rectifier based on controlled transistors, filter capacitor, current regulator, control system, where each output of the rectifier is connected to respective phase windings of external power transformer A, B, C, output terminals of the rectifier are connected to filter capacitor and regulator input, output terminals of the regulator are connected to plasmatron input, control system is connected to actuator units of the regulator, and includes additional second three-phase bridge rectifier based on controlled thyristors, and regulating switch consisting of six thyristors, where input terminals of the first rectifier A1, B1, C1 are connected to delta group of phase windings of external transformer, input terminals of the second rectifier A2, B2, C2 are connected to star group of phase windings of external transformer, positive output terminal of the first rectifier is connected to positive output terminal of the second rectifier, to positive terminal of filter capacitor and to positive input of regulator, negative output terminal of the first rectifier is connected to negative output terminal of the second rectifier, to negative output terminal of filter capacitor and to negative input of regulator, cathode of first switch thyristor is connected to input A1 of the first rectifier, cathode of second switch thyristor is connected to input B1 of the first rectifier, cathode of third switch thyristor is connected to input C1 of the first rectifier, anode of fourth switch thyristor is connected to input A2 of the second rectifier, anode of fifth switch thyristor is connected to input B2 of the second rectifier, anode of sixth switch thyristor is connected to input C2 of the second rectifier, anodes of first, second, third switch thirystors are combined with cathodes of fourth, fifth, sixth switch thyristors in a single point.EFFECT: reduced set power of plasmatron power source.2 dwg |
