FIELD: metallurgy.
SUBSTANCE: invention refers to welding, particularly to method of electric power supply for welding transformer in single-phase butt-welding AC aggregates. Method involves voltage generation with frequency of 3/4F for welding transformer with rated frequency F by two three-phase full-way controlled rectifiers connected in parallel opposition. Each voltage half-wave is generated by sequential commutation of two line voltages. Half-wave of one polarity begins with commutation of the same line voltage as in the end of previous half-way of another polarity. The method allows for power supply of contact flash welding aggregates with single-phase transformer from three-phase network. Obtained voltage pulse shape is favourable for high-quality welding joint as its peak factor KA is lower than for harmonic current welding. Selected line voltage connection sequence at the beginning and end of each half-wave enables reliable power supply and almost continuous welding current curve in most cases.
EFFECT: uniform load on three phases of welding aggregate power supply network.
2 dwg
Title | Year | Author | Number |
---|---|---|---|
CONTROL OVER ELECTRIC POWER SUPPLY OF WELDING TRANSFORMER FOR SINGLE-PHASE AC WELDING MACHINES | 2011 |
|
RU2521743C2 |
DEVICE TO BALANCE SINGLE-PHASE NON-STATIONARY LOAD CREATED BY CONTACT SEAM WELDER | 1997 |
|
RU2156532C2 |
POWER SUPPLY SOURCE FOR PULSED ARC WELDING | 0 |
|
SU1333500A1 |
SINGLE-PHASE ELECTRIC CURRENT STABILIZER FOR WELDING | 2005 |
|
RU2299794C1 |
METHOD OF ARC WELDING WITH THREE-PHASE ARC AND DEVICE FOR ARC WELDING | 2012 |
|
RU2548542C2 |
APPARATUS FOR AUTOMATIC PROGRAM CONTROL OF BUTT RESISTANCE WELDING | 0 |
|
SU1540877A1 |
APPARATUS FOR WELDING | 0 |
|
SU1382616A1 |
0 |
|
SU192983A1 | |
0 |
|
SU460144A1 | |
DEVICE FOR DETERMINING PHASE-TO-PHASE AND GROUND FAULTS IN NETWORKS WITH AN ISOLATED VOLTAGE OF 6-10 kV NEUTRAL | 2022 |
|
RU2788035C1 |
Authors
Dates
2010-06-20—Published
2007-09-27—Filed