A multifunctional welding machine driving circuit

Abstract

The invention discloses a multifunctional welding machine driving circuit. The multifunctional welding machine driving circuit is characterized in that a transformer T4 is arranged in the multifunctional welding machine driving circuit and comprises at least one primary winding and at least two secondary windings; the primary windings are connected with alternating-current output phase, direct-current voltages are outputted by output of the primary windings via a full-bridge rectification output module, direct-current voltages are outputted by output of the secondary windings via the full-bridge rectification output module, the secondary windings are provided with center tap ends, the center tap ends are connected with output negative ends of the full-bridge rectification module, and output positive ends of the full-bridge rectification output module are used as a first output positive end and a second output positive end. Compared with the prior art, the multifunctional welding machine driving circuit in the technical scheme has the advantages that the material cost can be saved, the multifunctional welding machine driving circuit is simple and is easy to implement, and good effects can be realized by the multifunctional welding machine driving circuit; the performance of multifunctional electric welding machines can be effectively improved without increase of the cost, and the failure rates of the machines can be reduced.

Description

technical field [0001] The invention relates to an electric welding machine circuit, in particular to a multifunctional welding machine driving circuit applicable to electrode arc welding, tungsten argon arc welding and plasma cutting. Background technique [0002] In the prior art, during the processing of metal materials such as iron and steel by electric welding machines, welding machines with multiple functions are usually used according to different material properties and processes. . Therefore, electric welding machines with multiple welding functions and cutting functions have become the first choice of many users. At present, multi-functional electric welding machines mostly use voltage doubling and step-down circuits for relay switching. In actual use, problems such as output voltage imbalance and relay contacts burning during frequent switching are prone to occur, resulting in poor welding results. At the same time, the machine failure rate is high and other und...

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Problems solved by technology

In the process of realizing the three functions, several windings output by the transformer need to be connected in parallel or in series, but the actual output voltage of each winding cannot be exactly the same, so the voltage and current output by each winding are unbalanced and unbalanced in the actual working process. Affect the effect of welding and cutting. At the same time, because the functions are different, it needs to be realized through the conversion of the relay, which increases the failure rate of the machine and reduces the stability of the machine.

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