Waveform control circuit for alternate current argon arc welding machine

Abstract

The invention discloses a waveform control circuit for an alternate current argon arc welding machine. The waveform control circuit is used for adjusting the positive and negative amplitude of square waves of the alternate current argon arc welding machine and is characterized by comprising a triangular wave generation circuit, a chopper circuit, a time delay circuit, a differentiating circuit, a rising edge and falling edge detection circuit and a given current selection circuit; the triangular wave generation circuit is used for generating a triangular wave; the chopper circuit is connected to the output end of the triangular wave generation circuit and is used for outputting the square wave with the output duty ratio adjustable; the time delay circuit is connected to the output end of the chopper circuit and is used for generating two complementary square wave drive signals; the differentiating circuit is connected to the output end of the chopper circuit and generates signals P1 and P2; the rising edge and falling edge detection circuit judges the rising edges and the falling edges of the square wave drive signals according to the signals P1 and P2; the given current selection circuit outputs a positive wave output control signal and a negative wave output control signal according to the square wave drive signals and the rising edges and the falling edges of the square wave drive signals.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for independent regulation of an alternating current (AC) signal's frequency during each period between two voltage levels called on-state or off- state. By doing this, the power supply system has better efficiency compared to previous methods while also increasing its ability to remove impurities from the workpiece being processed. Additionally, reducing the duration of these periods results in less heat input into the electrode wire used to generate electricity causing damage due to overheated spark plugs. Overall, this new method enhances both cleaner quality and faster cutting speeds without sacrificing protective fuses needed inside the equipment itself.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance of AC gas torches while maintaining stable operation under different conditions or operating modes.

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