LS model identification with MILS

Introduction

This document describes the procedure required to create the LS (Loss-Surface) model of a ferromagnetic steel sheet from experimental magnetic measurements using MILS (Altair® Flux® Loss-Surface Model Identifier).

An LS model identified by MILS is typically used in a Flux project to describe the hysteretical behavior of a region composed of stacked ferromagnetic steel sheets belonging to an electromechanical device (e.g., rotating electrical machines, actuators, and transformers). The LS model allows the user to perform an a posteriori evaluation of the iron losses taking place in the device (that is, the hysteretical behavior of the material is taken into account after the resolution of the Finite Element problem with Flux, and the losses are evaluated during the post-processing of the results).

For further information on the LS model, including its theoretical basis and discussions on the experimental setup employed to generate the magnetic measurements required by MILS, please refer to the list of published works available here.

Note: In case you need assistance to characterize your own sheets, Altair and/or its partners may perform the required magnetic measurements and LS identifications. For additional information, please contact Altair's customer support.

How to use MILS

The following topics provide an overview of the fundamental concepts involved in the identification of an LS model representing a steel sheet: