Energy-saving control circuit for power supply of gas shielded welding machine

Abstract

An energy-saving control circuit for a power supply of a gas shielded welding machine comprises a gas shielded welding machine servo mechanism, a single-chip microcomputer, a photoelectric coupler and a relay and is characterized in that the gas shielded welding machine servo mechanism is a welding machine host control electric plate; the single-chip microcomputer adopts an analog circuit; one end of the photoelectric coupler is connected with the welding machine host control electric plate, and the other end of the photoelectric coupler is connected with a welding machine main transformer; the photoelectric coupler receives a welding current signal from a welding gun or a gouging clamp and feeds back the welding current signal to the single-chip microcomputer, and the single-chip microcomputer receives the current signal; and the relay controls the current of the welding machine main transformer, and the state of the welding machine is controlled. The control circuit has the advantages that the single-chip microcomputer is used for control, the circuit is simple and reliable, procedures written in the single-chip microcomputer can be modified as required for adjustment of stand-by time and response time, and ordinary electric devices are adopted for simple assembly and convenient popularization.

Description

technical field [0001] The invention relates to a power saving control circuit, in particular to a power saving control circuit for a gas shielded welding machine power supply. Background technique [0002] At present, in the field of steel structure processing and installation, gas shielded welding is widely used as a common welding equipment due to its advantages of high welding efficiency and stable quality. Most of the current gas shielded welding machines use a DC power supply with a slow-down type or a constant current plus an external drag feature. In order to ensure the stability of the arc, it is necessary to ensure that the electrode has a certain no-load (servo) voltage when it is not working. There are the following Congenital deficiency: [0003] 1. The labor intensity of the workers of artificial gas shielded welding is high, and the working surface is often moved, etc., and the equipment is often in a standby state; [0004] 2. The rest and waiting time of w...

AI Technical Summary

Problems solved by technology

[0003] 1. The labor intensity of the workers of artificial gas shielded welding is high, and the working surface is often moved, etc., and the equipment is often in a standby state;

[0004] 2. The rest and waiting time of workers is usually irregular, and there is no good solution to the problem of equipment being unloaded;

[0005] 3. The power supply of the welding machine does not form a circuit in the standby state, but the rectifier is still working in order to ensure the no-load voltage;

[0006] 4. Although the power of the welding machine is not high in the no-load state, it usually has 1.8~3KW. This part of the power is completely useless and loss

[0007] Therefore there are above-mentioned inconveniences and problems in the known gas shielded welding machine power supply

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