Impact of different cutting methods on core losses and magnetizing demand of electrical steel sheets

In this paper, the influence of cutting edges on the core losses and magnetizing demand is illustrated. First, measurements are done of the magnetic properties of electrical steel test strips with different widths in the Single Sheet Tester (SST). The cutting techniques water jet cutting (WC) and wire eroding (WE) are investigated in order to receive reference meas-urement results. Guillotine shearing (GS) is considered because it is the standard method to produce test strips for the SST at the electrical steel sheet producers. Laser cutting (LC) is examined in face of prototyping of electrical machines. The focus of the measurements are test strips stamped with an industrial cutting tool (IC). The results from the measure-ments are integrated in an analytical and numerical electromagnetic model in [1]. The results of this paper are a part of [2].