Energy-saving and reliable AC electric welding machine

Abstract

The invention discloses an energy-saving and reliable AC electric welding machine. The machine comprises an AC power supply, a first switch, a second switch, a first fuse, a second fuse, a first relay, a second relay, a first capacitor, a second capacitor, a third capacitor, a normally-opened contact switch of the first relay, a normally-closed contact switch of the second relay, a transformer, a welding handle, a first diode, a second diode, a third diode, first to seventh resistors, first to fourth voltage-stabilized diodes, a potentiometer, an one-way thyristor and an unijunction transistor; the first relay is powered off, the first capacitor is connected to a loop of the transformer, and the electric welding machine enters an idle load energy saving state under the current limiting effect of the first capacitor; when a welding part is in contact with the welding handle and after 5 seconds that the electric welding machine is stopped from normal work, the electric welding machine enters the idle load state. With the adoption of the machine, the standby current of a primary coil of the transformer can be automatically reduced when welding is not carried out, and thus the energy consumption of the electric welding machine can be reduced; the electric welding machine has the characteristics of being simple in structure, and reliable in performance during working.

Description

technical field [0001] The invention relates to an AC electric welding machine, in particular to an energy-saving and reliable AC electric welding machine. Background technique [0002] AC welding machine is a special step-down transformer, which converts 220V and 380V AC into low-voltage direct current. AC welding machine is an electric welding machine whose output power source is AC power. Due to the sharp drop in voltage after combustion, the performance of traditional electric welding machines is not reliable, and there are also problems of complex structure and high energy consumption. Contents of the invention [0003] The object of the present invention is to provide an energy-saving and reliable AC welding machine in order to solve the above problems. [0004] In order to achieve the above object, the present invention adopts the following technical solutions: [0005] An energy-saving and reliable AC welding machine, comprising an AC power supply, a first switch...

AI Technical Summary

Problems solved by technology

[0002] AC welding machine is a special step-down transformer, which converts 220V and 380V AC into low-voltage direct current. AC welding machine is an electric welding machine whose output power source is AC power. Due to the sharp drop in voltage after combustion, the performance of traditional electric welding machines is not reliable, and there are also problems of complex structure and high energy consumption.

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