Manufacturing efficient electrical motors with a predictive maintenance approach

To convert electric into kinetic energy within an electrical motor emerging magnetic fields have to be amplified by using electrical steels. The efficiency of this energy conversion is determined by the electrical steel's magnetic properties. Due to residual stress having a negative effect on an electrical steel's magnetic behavior, manufacturing processes like stamping that deform the material thereby decrease the electrical motor's efficiency. This paper presents a novel approach to predict stamping-related increased magnetic property deteriorations from in situ measured values. Using the approach can prevent an excessive efficiency decrease from increasing tool wear by just in time maintenance.