Digitization inversion arc welding machine output pole short circuit automatic protection system

Abstract

The invention discloses a digitization inversion arc welding machine output pole short circuit automatic protection system which comprises an inversion main circuit, a feedback circuit, a single-chip microcomputer circuit and a pulse width modulation control circuit, wherein the inversion main circuit is used for providing current and voltage required for a welding machine, the feedback circuit is used for obtaining output voltage of the welding machine output pole, the single-chip microcomputer circuit sends switching signals according to feedback voltage of the feedback circuit, and the pulse width modulation control circuit controls the communication and disconnection of the output current and the output voltage of the inversion main circuit according to the switching signals. Due to the fact that the single-chip microcomputer and the pulse width modulation (PWM) control circuit control the output of the welding machine, damage, caused by short circuit, of the welding machine is avoided, and short-circuit failure is removed without the need of shutdown. The digitization inversion arc welding machine output pole short circuit automatic protection system is convenient to use, fast and safe.

Description

technical field [0001] The invention relates to the field of metal welding equipment, in particular to a digital inverter arc welding machine output pole short-circuit automatic protection system. Background technique [0002] Since the inverter arc welding machines currently on the market in our country do not have the automatic protection function of the output pole short circuit, even if there are some insulation protection measures during welding, in the actual welding operation process, the welding machine is used in various complex use sites. Such as shipyards, field steel structures, bridge construction, etc., the welding machine is far away from the welding point, and some even reach 100 meters away, so that the output electrode circuit is often damaged, broken and short-circuited, resulting in frequent output of the welding machine. short circuit. If the above-mentioned abnormal situation occurs, if the on-site operators do not find it in time, it will cause the in...

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Problems solved by technology

[0002] Since the inverter arc welding machines currently on the market in our country do not have the automatic protection function of the output pole short circuit, even if there are some insulation protection measures during welding, in the actual welding operation process, the welding machine is used in various complex use sites. Such as shipyards, field steel structures, bridge construction, etc., the welding machine is far away from the welding point, and some even reach 100 meters away, so that the output electrode circuit is often damaged, broken and short-circuited, resulting in frequent output of the welding machine. short circuit

If the above-mentioned abnormal situation occurs, if the on-site operators do not find it in time, it will cause the instantaneous output current of the welding machine to increase, which will damage the welding machine, damage more cables, and cause abnormal conditions such as an increase in the load of the power grid, especially in wet places. Construction workers will be shocked by electric shocks, and short-circuits will occur in dry and air-dried sites, which will more easily cause fire and other safety hazards

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