WOLFRAM SYSTEMMODELER

HardMagnetic

Characteristics of common permanent magnetic materials (temperature dependence considered)

Package Contents

BaseData

Record for permanent magnetic material data

NdFeB

NdFeB sintered; exemplary values

Sm2Co17

Sm2Co17 sintered, exemplary values

SmCo5

SmCo5 sintered, exemplary values

PlasticNdFeB

Plastic-bonded NdFeB, exemplary values

PlasticSmCo

Plastic-bonded Sm-Co, exemplary values

HardFerrite

Hard ferrite sintered, exemplary values

PlasticHardFerrite

Plastic-bonded hard ferrite, exemplary values

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Typical values for remanence, coercivity and the temperature coefficient of remanence are provided for the common permanent magnetic materials illustrated below.

Demagnetization characteristics of included permanent magnetic materials

Linear demagnetization curves are modelled. The characteristic, temperature-dependent "knee" of many permanent magnetic materials is not considered, since proper design of permanent magnetic circuits should avoid operation of permanent magnets "below" that point due to partial demagnetization. As a result, the temperature coefficient of coercivity is not considered. Only the temperature coefficient of remanence alpha_Br is accounted for, since it describes the dependence of the demagnetization curve on the temperature sufficiently for the region "above the knee-point".

Additional user-specific materials can be defined as needed.

Wolfram Language

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SystemModel["Modelica.Magnetic.FluxTubes.Material.HardMagnetic"]
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