INFLUENCE OF WINDINGS LAY–OUT ON MEASUREMENT ERROR OF SOFT MAGNETIC CORES

Mojmír Kollár – Ján Bydžovský – Elemír Ušák – Peter Švec – Jozef Kuchta

   This paper was aimed to estimate the possible measuring errors caused by a non-uniform lay-out and/or alignment of the magnetizing and sensing windings each made of only a few turns. Some theoretical considerations, 2D numerical solutions and also measurements on several types of samples are presented leading to a surprising conclusion how many turns at least are necessary for the primary (magnetizing) and the secondary (sensing) windings to provide a reasonable accuracy of testing or measurements.

Keywords: toroid cores, stray fields, lay-out and alignment of magnetizing and sensing windings, magnetization losses

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