Double-wire and double-arc digital submerged arc welding power supply

Abstract

The invention discloses a double-wire double-arc digital submerged arc welding power supply, which includes a power supply module and a welding car, and a primary rectification module, a primary inverter module, a transformer module, and a secondary rectification module are sequentially connected between the power supply module and the welding car And the quadratic inverter model is fast. The three-phase 380V grid power supply is rectified by the power frequency rectifier bridge, and then supplied to the inverter to be converted into high-frequency AC, and then high-frequency transformation and rectification are performed. The output signal is controlled by feedback to obtain a smooth and continuously adjustable DC power supply. , sent to the secondary inverter for conversion, the inverter is converted into low-frequency AC, supplied to the welding car, and the workpiece is automatically welded by the welding car. The invention has the advantages of adopting the latest high-power IGBT switching device, high working efficiency, small no-load loss, stable welding current, large frequency adjustment range and high adjustment accuracy.

Description

technical field [0001] The invention relates to an AC welding power supply, in particular to a double-wire double-arc digital submerged arc welding power supply. Background technique [0002] Electric welding is a common name for electrode arc. A welding operation in which metal parts to be joined are melted by welding electrodes through an arc at high temperatures. The basic working principle of electric welding is to use the commonly used 220V voltage or 380V industrial electricity, through the pressure reducer in the welding machine to reduce the voltage, increase the current, and make the electric energy generate huge arc heat to melt the welding rod and steel, and the welding rod melts Make the fusion between steel and steel higher. The coating on the outer layer of the electrode and CO2 welding emit CO2 gas to prevent oxidation of the metal after melting. [0003] However, the existing power frequency transformers for welding machines are relatively bulky, have a na...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing welding machine power frequency transformer is relatively heavy, the frequency adjustment range is narrow, the adjustment accuracy is low, and the welding is unstable. The existing welding machine power frequency transformer is relatively heavy, the frequency adjustment range is narrow, the adjustment accuracy is low, and the welding is unstable.

Images