A SENSORLESS METHOD FOR THE IDENTIFICATION OF ASYMMETRIC HYSTERESIS LOOPS OF FERROMAGNETIC MATERIALS

Loredana Cristaldi, Alessandro Ferrero, Massimo Lazzaroni, Adriano P. Morando

Abstract

The sensorless determination of the dynamic hysteresis loop of the magnetic materials, and in particular those of magnetic plates, can be obtained under ac symmetric conditions in a relatively simple way. This paper proposes a new digital method and instrument for the sensorless determination of the dynamic hysteresis loop under ac asymmetric conditions, in the presence of a dc flux polarization. The method is based on the determination of the parameters of a simplified linear circuital model of the magnetic circuit, which shows an energy equivalence. The results of some experimental work are provided in order to validate the proposed method.

Keywords

magnetic measurements, sensorless measurement systems, Virtual Instruments, Digital Signal Processing

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IMEKO-TC4-2001-042.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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