The punching induces stress in electrical steels. This stress contributes to the degradation of their soft magnetic properties. The high-speed machine design step, specifically, for on board applications (automotive, aircraft generators, etc.), requires the consideration of the influence of both punching and frequency on the magnetic properties of the material. In this paper, thin SiFe soft magnetic characteristics are investigated. To do so, series of rectangular samples of variable width have been industrially punched and then measured based on a mini-Epstein frame. The measurements have been conducted from 50Hz to 1kHz and from 0.3T to 1.7T. Both longitudinal and transverse directions have been explored and the results are presented in an effort to supply the most relevant conclusions concerning the degradation of the dynamic magnetic characteristics.
electrical steels, frequency, high-speed machines, magnetic characteristics, punching.
The authors would like to thank the GIRTOM program members: DGA, EDF, GIMELEC, LEROY SOMER and THALES for this study support.
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