DE1060987B - Transformer for short voltage surges of very high intensity, especially welding transformer - Google Patents

Description

GERMAN

The invention relates to a transformer for short voltage surges with very high intensity a stump core made of laminated sheet metal.

Transformers of the type mentioned, albeit for small powers, are for example for. the Ignition coil used in automobiles. The main area of application of these transformers for large Power lies in the field of welding transformers. If normal high-current transformers are used for welding, the heating-up times are longer necessary. The material to be welded can anneal and thereby its structure change. If shorter heating times are to be achieved, the welding systems are disproportionate large and therefore uneconomical. Welding machines that. work with normal capacitor discharges, are mainly due to the unused post-oscillation of the capacitor discharge in terms of energy uneconomical. Efforts are therefore made to make these welds using shock ao voltage or pulse transformers using the pulse method. Surge transformers or pulse transformers of the known type have a rod-shaped, i.e. open iron core. This results in considerable spreads. When designed for high performance can therefore be considerable mechanical forces are exerted on neighboring iron parts, which can lead to the Iron core is torn out of the coil. Is the core of such a surge voltage transformer on any type attached so can in the event that the windings of the transformer from individual Discs are made, the outer turns repelled by the extraordinarily large axial forces will. In known surge voltage transformers for large powers z. B. these emerging Axial forces counteracted by the fact that pressure washers are attached to the ends of the winding, which press the winding together through a series of bolts. These pressure washers can also be made from Be made of angle iron constructions. In this construction, however, the pressure washers must be much larger than the winding. Due to the bolts lying outside the winding diameter This results in a considerable need for space and material.

The invention relates to an impulse voltage transformer in which the dynamic Forces are controlled and the material and space requirement is less than with known transfermators the same purpose.

In the transformer according to the invention for short voltage surges of very high intensity, in particular Welding transformers, with one made of lamel transformer for short voltage surges of very high intensity, in particular

Welding transformer

Applicant:

Rudolf zur Bonsen,
Düsseldorf-Heerdt, Am Heerdter Hof 20

■ Berthold Wald, Cologne,
has been named as the inventor

■ 2 ■ '.-.

lated sheet metal built stump core are according to the invention the turns of the high-current winding are formed by copper ring-like, slotted discs, which are crimped on the same side on the inner and outer edge. The electrical connection According to the invention, each turn takes place via two tabs extending radially outward.

In the case of the transformer according to the invention, the high-current windings are created by stacking them on top of one another ring-shaped chambers closed on all sides, in which the high-voltage winding in the form is housed free of scattering by disc coils.

According to the invention, in the transformer, which is arranged with one in its axis, on threaded bolts holding the laminated sheets of the stump core together is provided, the coils pushed over the iron core by means of round slotted pressure plates from after the middle to a stronger cross-section held together by the central fastening bolt.

The inventive embedding of the high-voltage windings in the form of disc coils in the high-current or secondary windings, which are designed in the form of chambers, are shown in the transformer of the invention largely free of scatter, since the scattering of the inner winding is shielded is. The induction effect in the high-current winding is completely even due to the round shape. Due to the drum shape and the central mounting of the transformer according to the invention is also given a space- and material-saving compact design. The manufacture of the high current winding according to the invention is possible through simple pressing or punching operations.

909 560/198

Claims (3)

Further details of the transformer according to the invention are explained with reference to the figures which show an example embodiment for a transformer according to the invention. Fig. 1 shows in elevation, with part in axial section, a transformer according to the invention; Fig. 2 shows a cross section through the transformer according to the invention. The transformer according to the invention has high current windings, i. H. Secondary windings, which consist of individual turns 1. These turns are in the form of copper circular ring disks, the inner and outer edges of which are flanged on the same side. These circular ring disks are preferably layered in pairs in such a fine-edged manner that they form circular chambers 2 lying one above the other. In these chambers the overvoltage effect is d. Ju the primary winding 3 in the form of disc coils, e.g. Bi made of rectangular wire, housed streuüngsirei. All copper chambers have a radial slot 4. Inside the turns is the core 5 made of laminated iron sheet, which is preferably constructed in steps. Ef has an opening 6 in its axis through which a correspondingly strong bolt 7 passes, which is provided with a thread at the ends. The bolt 7 is firmly connected to the stump core 5 by means of strong washers 8 and nuts 9. The individual chamber-shaped coils 2 with the upper voltage windings 3 are then pushed over the core 5. By means of round contact plates 10 on both sides with a cross-section that becomes thicker towards the center, the bobbin pack is firmly pressed together from both sides by means of two further nuts 11 and 11 '. The pressure plates 10 have a radial slot so that they do not act as short-circuit windings, and are made of non-magnetic material. By compressing the coil pack, the high-current winding is given the shape of two concentric copper tubes which, apart from a small slot 4, are closed and divided into combs. The electrical connection to each winding 1 is made via two radially outwardly extending tabs 12. Claims: 1. Transformer for short voltage surges of very high intensity, especially welding transformers with a stump core constructed from laminated sheet metal, characterized in that the turns of the high-current winding are formed by copper ring-like, slotted discs are, which are crimped on the inner and outer edge to the same side, and that the electrical Each turn is connected via two radially outwardly extending tabs. 2. Transformer according to claim 1, characterized in that that by stacking the "" high-current windings closed on all sides Ring-shaped chambers are created in which the high-voltage winding is housed in the form of washer sinks without scattering. 3. Transformer according to claim 1 or 2, with one arranged in its axis, at the ends ■ threaded bolts holding the laminated sheets of the stump core together, characterized in that the coils pushed over the iron core by means of round, slotted Pressure plates from the cross-section through the central one which becomes stronger towards the middle Attachment bolts -be held together. Considered publications:
German patent specification No. 708 665. For this purpose i sheet of drawings © 909 060/198 6.59