Measurement of resistivity of soft magnetic laminations at elevated temperatures

Abstract The variation of resistivity in soft magnetic materials with temperature is extremely important for applications of electrical machines in aerospace applications. The design of a system for rapid and accurate measurement of the resistivity of Epstein strips under a wide range of temperatures is presented. Two cobalt–iron alloys are assessed up to 200 °C, showing significant differences in their resistivity but almost identical temperature coefficients of resistivity.