Fundamental investigations of eddy current losses in laminated stator cores created through the impact of manufacturing processes

This paper presents investigations into the eddy current losses of laminated stator cores with electrically connected edge areas. The application of various manufacturing processes can lead to an electrical connection of the lamination core edges and therefore to additional eddy current losses. This paper considers the impact of connected core edges on the losses of a ring core sample. The analysis shows that the eddy current losses increase dramatically when connecting the core edges. Based on the results achieved by finite element analysis, a simple equivalent electric circuit model is introduced. For verification of the model, the circuit model is introduced. For verification of the model, the circuit was simulated with an analog circuit simulation software. Finally the calculated results have been validated experimentally on a ring core sample with galvanically connected edges.