SU1479221A1 - Thyratron welding generator - Google Patents

Abstract

The invention relates to electrical engineering, in particular to electrical machines, and can be used in welding production. The purpose of the invention is to simplify the design of the device, reduce its weight and size parameters and labor intensity of manufacture, reduce arc noise, and increase the efficiency of the generator. The device contains the main and additional core windings. The additional core winding is connected via a rectifier to the field winding. In this case, one straightener shoulder contains a gap, the ends of which are connected to the same terminals of the welding generator. When welding, an arc fed by a power rectifier closes the gap in the shoulder of the exciter circuit. The excitation winding current increases when switching from idle mode to welding mode, which allows to increase generator efficiency. 5 il.

Description

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The invention relates to electrical engineering, in particular to electrical machines, and can be used in welding production.

The purpose of the invention is to simplify the design of the device, reduce its weight and size indicators and labor intensity of manufacture, reduce arc noise, and increase the efficiency of the welding valve generator.

FIG. 1-5 shows the variants of the electrical circuit diagram of the valve welding generator.

When a single-phase additional winding 1, operating from multiples of the third harmonic field, in idle mode, the excitation winding 2 is powered through diode 3 (Fig. 1) or diodes 3-5 (Fig. 2) and a regulating device 6.

In the load mode, the welding arc 7, fed by a power rectifier 8, closes the gap in the shoulder of the excitation circuit rectifier. The current of the winding 2 increases due to the transition to the two-stroke mode of discharge.

The control device 6 allows to regulate the value of the no-load voltage and the welding current. The control device 9 corrects only the welding current.

Similarly, circuits with a three-phase additional winding (Fig. 3), containing diodes 10-12, work. In these schemes, the degree of forcing of the excitation current in the load mode depends on the number of non-return valves activated by the arc.

With a single rectification circuit and a three-phase additional winding (Fig. 4), the excitation current in the load mode is ensured by switching the welding arc into operation of one or two phases of the additional winding.

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WITH

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FIG. Figure 5 shows a circuit diagram of a valve welding generator with a single-phase auxiliary winding 1 and with a half-wave rectifier in the excitation circuit. The excitation current is forced in the welding mode by switching on the shunt excitation winding 2 of the diode 4 by the arc.

Compared to the basic prototype object, the generator reduces the idling voltage and losses in the field winding and thereby increases the efficiency of the generator.

Claims (1)

Invention Formula A valve welding generator containing a main core winding with a pole number of 2p and an additional core winding with a pole number of 6p, connected via a rectifier to an excitation winding, characterized in that, in order to simplify the design, reduce weight and size and labor intensity, reduce arc noise and increase generator efficiency, one straightener shoulder contains a gap, the ends of which are connected to the same terminals of the welding generator. phi.1 FIG. 2 H ™ g . & & I figs ex Ohno four w / IG about - Јi nd + sriga R Fig 5