Transformers for Resistance Welding

The main market in this case is the automobile industry. Resistance welding transformers are mainly used in two cases. The first involves situations in which two or more parts (steel, copper, brass, aluminium, etc…) need to be joined for the current to flow, using just a resistive contact between them.

The transformers are used in both stationary and flexible robot welding systems, and are available in a wide output range. These can be adapted to suit all mains voltages and frequencies on the primary side.

Note, All our configurations supplied comply with all the major European and International Standards.

We are able to Transformer solutions for the following resistance welding processes:

  • Spot welding (manual and robot guns)
  • Fine spot welding
  • Projection welding
  • Seam welding
  • Flash welding
  • Wire mesh welding
  • Capacitor discharge welding

In addition to applying power (50Hz) directly, a further piece of equipment called an Inverter can be integrated into the power circuit to allow for different frequencies to be used, alter the phase loading and reduce the inductive losses. For further information on the available techniques and solutions, please contact us to discuss your particular application.

Multi-welding 50Hz | Transformers

These transformers are predominantly used in fixed tools for spot welding. The transformers with two secondary circuits can be connected using fixed copper jumpers, either in series or in parallel. Their compact execution and favourable prices enable them to be used in assembly line robots or as hanging transformers, connecting their secondary connections in series.


Hanging 50Hz | Transformers

These transformers are used in premises with manual and compact hanging points. The long secondary circuits require high secondary voltages, hence the need to keep two secondary coils inside that are connected in series.


Machine 50Hz | Transformers

This type of transformer with large cast or laminated copper secondary terminals is used in standard machines for spot, projection, roller and butt welding. It enables fixed busbars or laminates to be connected.

In projection welding, the compression stress and the current flow are located in one or several specific points set by the projections in one of the two parts to be joined. If roller-type electrodes are used, and the current flow times through the overlapped parts is very high, we will be talking about roller welding. If, in contrast, one of the parts to be welded is fixed to the machine, and the other moves towards the first until it penetrates it, causing a crackle, we will be talking about butt welding.


Standard TS 50Hz | Transformers

Transformers for welding machines, whether spot, projection, butt or roller, with a compact design and very low impedances. Due to their internal configuration, they can take on levels from 16 KVA up to 1200 KVA.

Spot, projection, butt and roller welding machines.


Weld Guns (Manual and Robot) 50Hz | Transformers

These transformers are directly integrated into robot tongs or in hand welding tongs or guns. They can be changed without the need for readjustment, thanks to the parallel-plate machining of their assembly surfaces and the use of H7 pins.