RU1784009C - Source for electric arc welding - Google Patents

Abstract

Uses1 electrical engineering, in particular the production of welding transformers. Summary of the invention The source comprises a welding transformer and a cosine capacitor. An overvoltage winding is additionally located on the transformer’s magnetic circuit. A cosine capacitor 1 il is connected to its taps.

Description

The invention relates to electrical engineering and can be used in production. welding transformers.

Known welding transformer containing the primary and secondary windings, magnetic circuit. In this case, the appropriate arrangement of the windings and their combination, the presence of magnetic shunts, the presence of reactor windings are permissible. The design drawback is the increased current consumption from the power supply due to the high reactive (inductive) power of the transformer in the operating mode.

The closest in technical solution is the source for electric arc welding, containing primary h, secondary windings, a magnetic circuit and a cosine capacitor connected in parallel to the primary winding

A design drawback is that to compensate for reactive power, a capacitor bank of appropriate power is required, but since Sleep is connected to a low-voltage network, and its power is determined by the formula Q 2tg fCU2 where a) 2l f.

f is the voltage frequency of the network,

C is the capacitance of the capacitor;

U is the voltage on the capacitor (overvoltage winding), a capacitor of considerable capacity is required, which increases the dimensions and weight of the welding device

The aim of the invention is to reduce the material consumption and overall dimensions of the source of electric arc welding.

This goal is achieved by the fact that in the source for electric arc welding, containing primary and secondary windings, a magnetic circuit and a cosine capacitor, a high voltage winding is located on the magnetic circuit, to the taps of which a cosine capacitor is connected

The drawing shows a circuit diagram of a source for electric arc welding

The device consists of a magnetic circuit 1, primary winding 2, secondary winding 3, overvoltage winding 4, capacitor 5, electrode 6, part 7

The capacitance of the capacitor 5 is determined by the formula

C - O / 2l f U2,

those. inversely proportional to the square of the voltage

WITH

h | 00

ABOUT

about y

With

taken from the calculation of the current strength in it, equal to

| )WITH.

In order to ensure safety, reliability and a slight increase in the geometric dimensions of the transformer, it is advisable to carry out the winding 4 with a voltage of up to 1000 V,

The device operates as follows,,

When the winding 2 is connected to the network, the voltage is induced on the winding 3, forming an arc between the electrode b and the part 7. At the same time, the voltage is applied to the winding 4. Through which current flows and capacitive reactive power is generated in the network, which compensates the inductive reactive power, reducing the consumed from the network current. In this case, regardless of the design features of a welding transformer with transverse reactive power compensation, the introduction of an overvoltage winding with an attached capacitor reduces the material consumption and overall dimensions of the device.

Claims (1)

SUMMARY OF THE INVENTION An electric arc welding source comprising a cosine capacitor and a transformer consisting of a magnetic conductor, a primary and a secondary winding, characterized by the fact that, in order to reduce material consumption and overall dimensions, an overvoltage winding is additionally located on the transformer’s magnetic circuit whose terminals are connected with cosine condensates Network g 0-) & I -0 /