Simulation of a synchronous reluctance machine taking into account the processing influences on the electrical steel

Inhalt:
The cutting process and the joining of electrical steel for electric machines lead to changes in the properties of the material. The magnetic properties deteriorate significantly at the cut edges in particular, compared to the standardized manufacturer specifications from an Ebstein frame. The deviations become increasingly relevant with decreasing magnetic circuit dimensions. This can result in considerable changes in motor characteristics compared to a design based on material data from the manufacturer. Using the example of a synchronous reluctance machine, the influence of processing is simulated in FEM models using various methods and compared with measurements. Due to a high proportion of cut edges, especially in the rotor, this design is sensitive to processing influences. The advantages and disadvantages of methods for taking processing effects into account are evaluated and discussed. The necessary material data is determined using lasercut sheet metal samples and a separate test setup. The special measurement setup for the relatively small sample geometries is also briefly presented. This paper was realised as part of the SOFIE research project. Supported by the Free State of Thuringia and the European Social Fund Plus.