Another recent research subject deals with electromagnetic losses in soft magnetic materials . Some of the aims are to obtain more accurate macroscopic models and to develop better measurement procedures. The improved measurement procedures will allow better characterisation of non-oriented and grain oriented soft magnetic materials. The macroscopic material models are mainly based on the Preisach theory.
Emphasis is put on both unidirectional and vectorial models.
The theoretical, numerical and experimental analysis of noise and vibrations of electrical machines is another research subject. For the present, primarily rotating machines, in particular induction motors and switched reluctance motors, have been investigated with this respect. In the future also transformer noise and vibrations will be dealt with. An important research subject is the study of the dynamic behaviour of the three classical machine types, particularly as to the effect of main field saturation and power electronic supplies. Field oriented control techniques are improved using nonlinear motor models and rotor co-ordinates.