Induction heating can be used rationally and in high quality when brazing the various connections of slip ring rotors in electrical machine construction. The brazing sleeves which were previously used can be omitted; the parts to be joined are brazed together directly within a short time. The insulation can reach right up to the brazing point in some cases (see picture on the left); it will suffer only insignificant damage.
The procedure is very simple. The parts to be joined are aligned and the filler metal, usually in the form of a film, is clamped between them. The coaxial transformer with inductor suspended on the balancer is moved to brazing position, and the brazing process is started with the foot- or hand-operated switch.

System description:
Slip ring rotors are brazed using our inductive heating systems of the type eldec MFG 30 with 30 kW continuous output power up to the eldec MFG 100 with 100 kW or higher continuous output power.
The systems can also be equipped to permit alternating operation with several power outputs. Furthermore, heating cables, which are also used for joining or separating shrink-fit connections, can then be used in addition to or instead of the coaxial transformer. All this requires is a manual or motor-driven switchover function within the device to the respective power output.