ANALYSIS OF CAPABILITIES OF SMALL DOUBLE-YOKE SINGLE SHEET TESTER

Elemír Ušák – Jan Bydžovský – Volodymyr Stoyka – František Kováč

   In this paper we describe the results of magnetisation characteristics measurements performed on small (40×10×0.3mm³ and 40×25×0.3mm³) grain-oriented laminates. Influence of sample dimensions, method of magnetic field intensity determination and magnetic flux density sensing coil design is analysed and the results obtained are compared with the results of standard Epstein frame and SST method. Further, the efficiency of digital feedback algorithm providing defined magnetic flux density waveform was tested with regard to the frequency and amplitude of exciting magnetic field

Keywords: magnetic measurement methods, single-sheet tester, digital feedback algorithm, grain-oriented laminates

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