Modelica.Magnetic.FluxTubes.Material.HardMagnetic

Information

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

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.

Package Content

Name	Description
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

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.BaseData

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.NdFeB

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.Sm2Co17

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.SmCo5

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.PlasticNdFeB

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.PlasticSmCo

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.HardFerrite

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]

Modelica.Magnetic.FluxTubes.Material.HardMagnetic.PlasticHardFerrite

Information

Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.

Parameters

Name	Description
H_cBRef	Coercivity at reference temperature [A/m]
B_rRef	Remanence at reference temperature [T]
T_ref	Reference temperature [K]
alpha_Br	Temperature coefficient of remanence at reference temperature [1/K]
T_op	Operating temperature [K]