Brazing pole coils

Brazing system and generator from eldec: efficient brazing of pole coils

Pole coils, as used in the synchronous generators of hydro power plants for example, have to be brazed with high precision. An automatic brazing system from eldec combined with eldec's Custom Line MFG 75 generator guarantees efficient processes.

Precise induction brazing

Synchronous generators lie at the heart of many power plants, where they are used for electricity production. Pole coils, in turn, are an essential component in every synchronous hydro generator. They are wound or inserted directly onto each pole.

With this in mind, it is clear why the brazing of pole coils is a demanding process. The part has to be precisely positioned and fixed in place before brazing. Finally, the brazing site is then pressed to prevent protrusions around the brazing area.

The induction experts at eldec have developed a brazing system for the production of pole coils that carries out the demanding brazing work fully automatically. The energy source used is the Custom Line MFG75 medium-frequency generator from eldec. The induction generator supplies the required power without delay, so that brazing can begin immediately. The user consequently benefits from a rapid, precise application of heat – which ultimately means unsurpassed brazing quality.

Brazing pole coils

Technical data

  • Pole coil inside length: 600 to 4000 mm
  • Pole coil inside width: 150 to 800 mm
  • Min. copper cross section: 3 x 20 mm
  • Max. copper cross section: 15 x 150 mm
  • Max. pole coil weight: 2000 kg
  • Max. pole coil height: 300 mm


  • Excellent brazing quality
  • High repeatability
  • Low energy consumption
  • Precise application of heat

Relevant Generators


product Inquiry

I may withdraw my consent at any time. This can be done by an informal note to: eldec Induction GmbH, Otto-Hahn-Strasse 14, 72280 Dornstetten, Germany or

* Field must be filled