What made you decide to start your own transformer production? I have been selling transformers all my life until I got the idea to make them by myself. In my first job, we started selling SGB transformers from Regensburg and later Neumark. I studied high voltage engineering at the University of Brno. It was a direct route from trading transformers to actual production. For vertical building, the table is tilted by 90° towards the ground by means of a traverse and the lower yoke, now shown to the top, begins to be built by individual packets.Ĭould you briefly introduce your company? After fixing all limbs by means of aligning pins to the assembly table and mounting the necessary accessory like stands for aligning pins, supports and lever clamps, which are necessary so that the limbs remain in a completely steady position. The alignment pins are replaced by others, more suitable for the transfer of whole limbs which have a fixed shape. The whole process of building starts already on the stacker, where laminations are already grouped into limbs and yokes. The upper yoke is inserted only after all high voltage and low voltage coils have been put onto the limbs. In both processes, the magnetic circuit is built without an upper yoke, and the magnetic circuit is then E-shaped. There may be limitations for horizontal assembly due to yoke cross-sections and yoke clamp shapes, in which cases the vertical assembly will be preferred. Assembling of transformer coresīuilding a magnetic circuit by means of lower yoke insertion can be done in two different ways - in a vertical or horizontal position. It is needed to compensate for the actual sheet thickness, as some deviations from the theoretical values are required. Measurement of packet height plays an important part in the stacking process. On one of them, stacking procedure can take place, while from the other, ready cut cores are being taken away, or positions of the alignment pins are being changed for the following designs. The GEORG precisioncut TBA400 uses two stacking cars which can both be swapped automatically. Laminations of medium length up to 2200 mm or 2500 mm have three or two stacking spaces available, which already requires a different cutting sequence. In order to achieve a maximum cutting performance and minimize the movement of the stacker, it is best if a full sequence (one magnetic circuit) fits in one row on the stacker.įor medium lengths of laminations of less than 650 mm, 10 stacking spaces can be created in one row, so two full cutting sequences (two identical magnetic circuits) can fit there, which results in even higher performance, as to the laminations of medium length up to 1200 mm, five stacking spaces can fit in one row. The motorized movement also allows batch production, thus achieving precise positioning for different transverse stacking positions. The GEORG precisioncut TBA400 is equipped with motorized stacking cars providing enough space to stack several logs in the transverse direction. The stack gradually grows until it forms a complete limb or yoke. The laminations are transported above the designated positions, being dropped right through the punched holes for the pins, sliding down in alignment with the rest of the stack. An arrangement of pins located on stacking cars ensures the perfect alignment of the finished stacks. The key for the highest output values is the idea of applying CNC controlled longitudinal movement to all punching and cutting tools to synchronize punching and shearing events, hence minimizing the number of stops in the strip movement.Ī belt conveyor transports the cut laminations over to the bottom-pin log stacking system. The punching and cutting part of the GEORG precisioncut TBA400 is the heart of the machine being equipped with a wide range of tools. From manual in-feeding up to automatic strip in-feeding and realizing strip change times of less than a half-minute greatly reducing the machine’s non-productive times. GEORG offers a wide range of different systems with various automation options. The great advantage of having multi-mandrel decoiler systems is the possibility of changing coils by the operators while other coils are being unwound and cut at the same time. The first part consists of a decoiler, on which coils of electrical steel of a required width are loaded and uncoiled during operation. This machine is designed for the highest output values using advanced punching and cutting parts combined with a bottom-pin log stacking system, which is considered one of the most efficient ways of distribution transformer core production. This article is about the automatic Step-Lap Cutting Line GEORG precisioncut TBA400 in high-speed configuration, which is also used by Czech transformer manufacturer Elpro-Energo Transformers s.r.o. Core manufacturing process with a GEORG precisioncut TBA400 and core assembly tables
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