Thin double-wire digital soft switch inverter welding power source system and control method thereof

Abstract

The invention relates to the technical field of welding equipment, in particular to a thin double-wire digital soft switch inverter welding power source system and a control method thereof. The system comprises over-voltage under-voltage protection and detection circuits placed in the same welding power source case by adopting an integrated structure, a man-machine interaction system, an ARM master controller in which a welding process expert database software system is placed, two limited bipolar soft switch full-bridge inverter main circuits with the same structure, and two drive and detection circuits with the same structure, wherein the limited bipolar soft switch full-bridge inverter main circuits take insulated gate bipolar transistors (IGBT) as switching elements. The system can improve the welding efficiency on the premise of ensuring the welding quality and the welding stability, effectively reduce the influence of electromagnetic interference of a welding site and eliminate mutual electromagnetic interference between two welding wires, has high safety performance, can reduce equipment volume and lower equipment cost, and is comparatively energy-saving.

Description

Technical field: [0001] The invention relates to the technical field of welding equipment, in particular to a fine twin-wire digital soft-switch inverter welding power supply system and a control method thereof. Background technique: [0002] The rapid development of the manufacturing industry has promoted the emergence and development of new high-efficiency automatic welding technology. The traditional single-wire welding system improves production efficiency by increasing the line energy, but excessively increasing the working current in single-wire welding will cause many problems, mainly welding defects such as hump weld bead and undercut. [0003] The symbol of high-efficiency welding is to improve welding efficiency on the premise of ensuring welding quality. There are many mature high-efficiency welding methods for the welding of medium and thick plates, among which twin-wire / multi-wire welding is a main method of high-efficiency welding. Compared with single-arc we...

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Problems solved by technology

The disadvantage of these high-speed welding equipment is the split structure, which requires mutual communication to achieve coordinated control, requires high communication speed, is easily affected by strong electromagnetic interference on the welding site, and the equipment is large in size and high in cost.

In addition, among the above-mentioned high-speed welding equipment, most of the inverter welding power supply equipment is a hard switch mode, which is in a hard-on and hard-off state during work, which has a large potential safety hazard and is not energy-saving.

In the above-mentioned twin-wire welding method, no matter which method, there are still certain problems in welding stability and weld quality, mainly because the mutual electromagnetic interference between the two welding wires is difficult to eliminate, and the spatter is relatively large.

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