Programs and virtual hysteresisgraph for scalar Preisach modelling

摘要

A virtual magnetic loop-tracer is presented, which provides a digital procedure for a fast and general characterisation of the magnetic sample under test. Based on these data, quasi-automatically acquired, dynamic Preisach models could be developed and tested. The paper presents an automatically attempt for the parameters identification. The experimental determination and measurement of the minor hysteresis loops used in fitting and testing computations was accomplished with a digital technique: a virtual hysteresisgraph utilising a software entirely written in LabWindows C. V. I~1; the only required hardware, excepting the P. C., is a plug-in DAQ board. A reliable and comprehensive methodology for testing and predicting the behaviour of various toroid cores as fluxgate sensors is also proposed and verified.