Complete digital inversion type square wave alternating-current argon arc welder

Abstract

A digital inverter-type square-wave alternating argon arc welding machine with excellent reliability, uniformity and stability consists of a power system and a control system, the power system consists of a primary wave filtering rectifier, a primary inverter, a main transformer, a secondary wave filtering rectifier, a secondary inverter and an output loop and responds to a control signal to convert grid high-voltage forward-spinning AC into low-voltage square-wave AC and complete the conversion from electric energy to heat energy through a welding circuit; the control system consists of a core function unit and a human-machine interaction interface and is characterized in that the core function unit is a digital signal controller (DSC) or a digital signal processor (DSP).

Description

technical field [0001] The invention relates to an inverter square wave AC argon arc welding machine, which is mainly used for high-quality welding of aluminum materials. Background technique [0002] The application of inverter technology in arc welding power supply has been very common. Today's mainstream square wave AC argon arc welding machines mostly use inverter mode (primary inverter). like figure 1 As shown, according to the classification of electrical functions, the inverter square wave AC argon arc welding machine can be divided into two systems, a power system 100 and a control system 200 . The inverter square wave AC argon arc welding machine is under the effective monitoring and orderly control of the control system so that the power system 100 converts the grid high-voltage positive-rotating AC (fixed frequency) into a low-voltage square-wave AC (variable frequency) and finally passes The welding circuit completes the conversion of electrical energy to therm...

AI Technical Summary

Problems solved by technology

The main problems of this type of welding machine are: reliability, consistency, relatively poor stability, low precision, monotonous output characteristics, single function that cannot be expanded, square wave AC frequency and positive-to-negative ratio cannot be adjusted, cumbersome debugging, and inconvenient maintenance

Microcontroller 230 replaces the three parts of sequence control logic circuit, timer circuit and waveform generation circuit of class A welding machine, which simplifies the control circuit. It is implemented by other circuits, so there are the following main problems: consistency, reliability, and stability are relatively poor, output characteristics are monotonous, fewer functions are difficult to expand, and performance improvement is limited

Images