Characteristics of common permanent magnetic materials (temperature dependence considered)
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.
Extends from Modelica.Icons.MaterialPropertiesPackage (Icon for package containing property classes).
| 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.BaseDataRecord for permanent magnetic material data
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from Modelica.Icons.Record (Icon for records).
| 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.NdFeBNdFeB sintered; exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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.Sm2Co17Sm2Co17 sintered, exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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.SmCo5SmCo5 sintered, exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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.PlasticNdFeBPlastic-bonded NdFeB, exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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.PlasticSmCoPlastic-bonded Sm-Co, exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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.HardFerriteHard ferrite sintered, exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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.PlasticHardFerritePlastic-bonded hard ferrite, exemplary values
Please refer to the description of the enclosing package HardMagnetic for a description of all permanent magnetic material characteristics of this package.
Extends from FluxTubes.Material.HardMagnetic.BaseData (Record for permanent magnetic material data).
| 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] |