Induction solutions in E-mobility

Induction heating is increasingly being used for the impregnation of stators and rotors because the heating speed, reproducibility, efficiency, and process reliability make it a super alternative to conventional ovens.

In the most common machine designs, the stator/rotor is gripped from the inside, so heating is done with an outer ring inductor. In any case, the heating is designed to suit the machine concept. Typically, the stator/rotor is preheated to approximately 100°C and then trickled. After trickling, the stator / rotor is then inductively heated to 150°C and hardened to 180°C.

Induction bonding is an equivalent assembly method to mechanical connections (staples, bolts, rivets, welds, screws, etc.). Induction heating also enables the gelling or curing of epoxy adhesives used to attach inserted magnets.
During induction assembly, there are no forces or vibrations compared to a mechanical connection. The magnetic properties of the magnet remain unaffected during the process.

Rotor shafts in traction motors have to withstand very high torques and at the same time be very light. Induction hardening is the best solution to provide strength in selected areas of the shaft and GH has a wealth of experience and several unique solutions to treat rotor shafts either on seats, splines, male or female types in 1, 2 or 3 zones. Our vertical scanners, TVK family, are even able to treat different zones in the same station, ready to integrate robots and minimize distortion.

Induction heating for joining is becoming more and more relevant in electric motor production, for example, the housing is joined to the stator assembly. The variants already implemented range from pure induction equipment to fully automatic heating and joining systems. GH solutions manage to join a huge range of housings / assemblies without the need to set up the mechanics and change the inductors.