A method to study the influence of background magnetic field on magnetic cores: Measurement, parameter identification and discussion

Abstract

Magnetic components are naturally sensitive to external magnetic fields and susceptible to severe interference. This paper attempts to reveal the influence of the background magnetic field on magnetic cores based on experimental measurements of hysteresis loops and parameter identification of the Jiles–Atherton model. Firstly, the classical Jiles–Atherton model is used to quantitatively model the hysteresis loop, and an improved artificial bee colony algorithm is proposed for the parameter identification. Then, hysteresis loops of magnetic rings in four materials are measured in different background magnetic field intensities and orientations, and the variation patterns are verified by simulation. Finally, key physical quantities of hysteresis loops and parameters of the Jiles–Atherton model under different test conditions are obtained and identified, whose variation patterns are summarized and discussed. The main contribution of this paper is the proposal of a methodology to reveal the background magnetic field effects on magnetic cores.