Validation of the Anhysteretic Magnetization Model for Soft Magnetic Materials with Perpendicular Anisotropy.

Roman Szewczyk

doi:10.3390/ma7075109

Abstract

The paper presents results of validation of the anhysteretic magnetization model for a soft amorphous alloy with significant perpendicular anisotropy. The validation was carried out for the Jiles-Atherton model with Ramesh extension considering anisotropy. Due to the fact that it is difficult to measure anhysteretic magnetization directly, the soft magnetic core with negligible hysteresis was used. The results of validation indicate that the Jiles-Atherton model with Ramesh extension should be corrected to allow accurate modeling of the anhysteretic magnetization. The corrected model may be applied for modeling the cores of current transformers operating in a wide range of measured currents.

Highlights

Among commonly used models of magnetic hysteresis loop [1], Jiles-Atherton model is the most interesting one from the theoretical point of view
In order to measure the anhysteretic magnetization for the given magnetizing field H, a sample of the soft magnetic material should be magnetized from the demagnetized state up to this field H, and the local demagnetization by AC magnetic field biased by the field H should be carried out [4]
That the anhysteretic magnetization covers B(H) dependency in the full range of magnetization H. This very good agreement is confirmed by the value of R2 determination coefficient which exceeds 0.99997

Summary

Introduction

Among commonly used models of magnetic hysteresis loop [1], Jiles-Atherton model is the most interesting one from the theoretical point of view It is one of the most useful models for technical applications [2], especially for development of PSpice models of inductive components [3]. In order to measure the anhysteretic magnetization for the given magnetizing field H, a sample of the soft magnetic material should be magnetized from the demagnetized state up to this field H, and the local demagnetization by AC magnetic field biased by the field H should be carried out [4] Such measurement is problematic due to the fact that the fluxmeter has to measure the flux density during demagnetization process.

Methods

Discussion

Conclusion