Inorganic Potting Compound for Electrical Machines to Improve the Thermomechanical Behaviour

This paper focusses on the thermomechanical behaviour of an inorganic potting compound for electrical machines. The stresses in the cement-based potting and the hotspot temperature of the motor windings in the slots are evaluated in 3D-FEM analysis. The mechanical material properties in dependence of the filler content are used to assess the material composition. A higher thermal conductivity can deteriorate reliability due to higher stiffness.