Macroscopic Simulation of Isotropic Permanent Magnets

TL;DR

This paper presents an efficient finite element-based simulation method for isotropic permanent magnets that accurately models magnetization, anisotropic, nonlinear, and hysteretic behaviors without full hysteresis characterization.

Contribution

The authors introduce a new simulation algorithm that integrates magnetization processes into finite element methods, simplifying modeling of isotropic magnets without detailed hysteresis data.

Findings

Simulation results agree well with strayfield measurements.

Proper material description is crucial for accurate magnet behavior.

Method is easily integrated with existing finite element tools.

Abstract

Accurate simulations of isotropic permanent magnets require to take the magnetization process into account and consider the anisotropic, nonlinear, and hysteretic material behaviour near the saturation configuration. An efficient method for the solution of the magnetostatic Maxwell equations including the description of isotropic permanent magnets is presented. The algorithm can easily be implemented on top of existing finite element methods and does not require a full characterization of the hysteresis of the magnetic material. Strayfield measurements of an isotropic permanent magnet and simulation results are in good agreement and highlight the importance of a proper description of the isotropic material.