SU1416280A1 - Apparatus for stabilizing a.c. arc - Google Patents

Abstract

This invention relates to devices for welding with alternating current with arc stabilization. The purpose of the invention is to increase the stability of the arc and reduce power consumption. The device contains a welding transformer, a storage capacitor, a current-limiting element, a threshold element and an autotransformer. The storage capacitor is charged from the secondary winding of the welding transformer. At the same time, the stabilizing pulse removed from the secondary winding of the autotransformer is not weakened. This makes it possible to carry out a device with a remote unit, which can be located in the workplace of the welder. The reduction in power consumption occurs due to the use of a capacitor in the device as a current-limiting element. 1 hp f-ly, 1 ill. € SL

Description

This invention relates to devices for welding on alternating current JCO by arc stabilization. I The purpose of the invention is to increase the stability of the combustion due to the charging of the storage capacitor from the secondary: Noy winding of the welding transformer and reducing the power consumption.

The drawing shows a diagram of device i: devices for stabilizing an alternating current arc.

The device contains a welding transformer 1, a storage capacitor 2, a current-limiting capacitor 3, a threshold element 4 made on the thyristors, and an autotransformer 5. One of the preprocessing conclusions of the autotransformer 5 through the storage capacitor 2 and the other through a threshold element 4 of the leads of the welding transformer 1. Another lead of the welding transformer 1 is connected via a current-limiting capacitor 3 to the free output of the secondary winding of the autotransformer 5. The diagram shows this same arc gap 6.

The device works as follows.

During half-periods when the arc is lit, the voltage on the capacitor 2 does not exceed the trigger level of the threshold element 4, and the stabilizing pulses are not generated. During the half-period when the arc is not ignited, the voltage on the capacitor 2 exceeds the triggering level of the threshold element 4. The capacitor 2 is discharged to the primary winding of the autotransformer 5 through the open threshold element 4; At the same time high-voltage

the impulse from the secondary winding of the autotransformer 5 through the capacitors 2 and 3 is applied to the arc gap 6. For efficient operation of the device, the capacitance of the capacitor 3 must be several times greater than the capacitance of the capacitor 2.

The device (with the exception of the welding transformer) is performed by a remote unit, its use allows to increase the arc stability during welding under mounting conditions. The device has small dimensions.

and weight.

Claims (1)

Invention Formula 1. A device for stabilizing an AC arc containing welding transformer, storage capacitor, current limiting element, threshold element, characterized in that increasing arc stability by charging a storage capacitor from the secondary winding of a welding transformer, an autotransformer is inserted into it, one of the terminals of the primary winding of the autotransformer through a storage capacitor, and the other through a threshold element connected to one of the terminals of the welding transformer, the other output of the welding transformer through The current limiting element is connected to the free output of the secondary winding of the autotransformer. 2, The device according to claim 1, about tl and - so that, with the aim reducing power consumption; a capacitor is used as the current-limiting element. L / Z W / z 7. F 2S -n 2