16.2 Surface Element Properties

16.2 Surface Element Properties#

Sets surface-element properties used for electromagnetic-field analysis.

Input settings#

16_2_2D_Element_Properties(16.2) JSON key: surface element properties object

SMAT_ID(16.2) Surface-element property ID.

SURFACE_IMPEDANCE(16.2) Sets surface impedance.

SIGMA(16.2) Conductivity.

MU(16.2) Relative permeability.

IMP_TYPE(16.2) Impedance type.

BH_CURVE_ID(16.2) BH-curve ID, for nonlinear surface impedance.

AGARWAL(16.2) Agarwal factor, for nonlinear surface impedance.

K(16.2) k value, for nonlinear surface impedance.

HK(16.2) Magnetic-field strength at the B-H curve “knee point”, for nonlinear surface impedance.

GAP_ELEMENT(16.2) Sets a gap element.

THICKNESS(16.2) Gap-element thickness.

THIN_CONDUCTOR(16.2) Sets a nonmagnetic thin-plate conductor.

THICKNESS(16.2) Nonmagnetic thin-plate conductor thickness.

SIGMA(16.2) Conductivity.

SIGMA_XYZ(16.2) Conductivity factors in the x, y, and z directions of the local coordinate system.

FACTOR_XYZ(16.2) Conductivity factors in the x, y, and z directions of the local coordinate system.

SHELL_COIL(16.2) Sets a surface-element coil.

THICKNESS(16.2) Surface-element coil thickness.

Input format#

Text-format section
Type:

Fixed parameter set 1

Number of rows:

1

Number of parameters:

5

Text format#
* SMAT_ID *  TYPE * SIGMA  *  MUR   * IMP_TYPE/THICKNESS *
     I      E      E

JSON format#

JSON format from 2024.11#
"16_Material_Properties" :
{
    "16_2_2D_Element_Properties" :
    [
        {
            "SMAT_ID" : I,
            "SURFACE_IMPEDANCE" :
            {
                "comment" : "TYPE=1",
                "SIGMA" : E,
                "MU" : E,
                "IMP_TYPE" : E,
                "Nonliear_Parameters" :
                {
                    "BH_CURVE_ID" : I,
                    "AGARWAL" : E,
                    "K" : E,
                    "HK" : E
                }
            }
        },
        {
            "SMAT_ID" : I,
            "GAP_ELEMENT" :
            {
                "comment" : "TYPE=2",
                "THICKNESS" : E
            }
        },
        {
            "SMAT_ID" : I,
            "THIN_CONDUCTOR" :
            {
                "comment" : "TYPE=3",
                "THICKNESS" : E,
                "SIGMA" : E
            }
        },
        {
            "SMAT_ID" : I,
            "SHELL_COIL" :
            {
                "comment" : "TYPE=4",
                "THICKNESS" : E
            }
        }
    ]
}

Detailed description#

Sets surface-element properties used for magnetic-field analysis.

16_2_2D_Element_Properties#

16_2_2D_Element_Properties(16.2)#
JSON key:

Surface element properties object

SMAT_IDS#

SMAT_ID(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 1]
Data type:

Integer (I)

Value:

>= 1

Description:

Surface-element property ID.

SURFACE_IMPEDANCE#

SURFACE_IMPEDANCE(16.2)#
JSON key:

Sets surface impedance.

Note

The IMP_TYPE = 1, 2, 3, and 4 options of SURFACE_IMPEDANCE are effective for steady-state AC analysis (AC(2) = 1) with nonlinear analysis (NON_LINEAR(2) = 1).

SIGMA#

SIGMA(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 2]
Data type:

Real number (E)

Unit:

S/m

Description:

Conductivity

MU#

MU(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 3]
Data type:

Real number (E)

Description:

Relative permeability

IMP_TYPE#

IMP_TYPE(16.2)#
Surface-impedance type#

Setting value

Description

0: Default

Uses linear surface impedance.

1

Nonlinear surface impedance with sinusoidal magnetic field.

2

Nonlinear surface impedance with sinusoidal electric field.

3

Mixed linear and nonlinear type with sinusoidal magnetic field.

4

Mixed linear and nonlinear type with sinusoidal electric field.

Additional data: IMP_TYPE = 1, 2, 3, 4#

For nonlinear surface impedance.

Text-format section
Fixed parameter set 1#
[row, col] = [2, 1:4]
Type=I(1), E(2,3,4)
Text format#
* BH_CURVE_ID * AGARWAL * K * HK *
    1            0.75     5.0    2000
JSON format#
JSON format from 2024.11#
    "Nonlinear_Parameters" :
    {
        "BH_CURVE_ID" : 1,
        "AGARWAL" : 0.75,
        "K" : 5.0,
        "HK" : 2000
    }
BH_CURVE_ID(16.2)#
AGARWAL(16.2)#
K(16.2)#
HK(16.2)#
BH_CURVE_ID:

BH-curve ID.

AGARWAL:

Agarwal factor.

K:

k value.

HK:

Magnetic-field strength at the B-H curve “knee point”, \(H_k\).

See [EQ7].

GAP_ELEMENT#

GAP_ELEMENT(16.2)#

Sets a gap element.

Note

When using FORCE_NODAL(10.3) or FORCE_NODAL(11) for gap elements, or when defining an insulating element, extend the surface elements by one layer outward from the magnetic material or conductor.

THICKNESS#

THICKNESS(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 4]
Type=E
JSON format#
JSON format from 2024.11#
    "GAP_ELEMENT" :
    {
        "comment" : "TYPE=2",
        "THICKNESS" : 0.01
    }
Data type:

Real number (E)

Unit:

m

Description:

Gap-element thickness.

THIN_CONDUCTOR#

THIN_CONDUCTOR(16.2)#

Sets a nonmagnetic thin-plate conductor.

THICKNESS#

THICKNESS(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 5]
Data type:

Real number (E)

Unit:

m

Description:

Nonmagnetic thin-plate conductor thickness.

SIGMA#

SIGMA(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [2, 5]
Data type:

Real number (E)

Unit:

S/m

Description:

Specifies conductivity. Use SIGMA_XYZ when conductivity is anisotropic.

JSON format#
JSON format from 2024.11#
    "THIN_CONDUCTOR" :
    {
        "comment" : "TYPE=3",
        "THICKNESS" : 0.01,
        "SIGMA" : 5.8e7
    }
Additional data: anisotropic conductivity#
SIGMA_XYZ(16.2)#
FACTOR_XYZ(16.2)#

Use SIGMA_XYZ when conductivity is anisotropic.

Text-format section
Fixed parameter set 1#
[row, col] = [1, 2]
Type=I

[row, col] = [2:4, 2]
Type=E
Text format#
* COORDINATE_ID * FX * FY * FZ *
    0          0     1    1
JSON format#
JSON format from 2024.11#
    "SIGMA_XYZ" :
    {
        "COORD_ID" : 0,
        "FACTOR_XYZ" : [ 0.0, 1.0, 1.0 ]
    }
COORD_ID:

Local coordinate-system ID used to define anisotropy. COIL(17.1)

FACTOR_XYZ:

Conductivity factors in the x, y, and z directions of the local coordinate system (0 <= FACTOR_XYZ <= 1).

SHELL_COIL#

SHELL_COIL(16.2)#
JSON key:

Sets a surface-element coil.

A surface-element region can be treated as a coil by connecting it to PHICOIL(17.4).

THICKNESS#

THICKNESS(16.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 5]
Data type:

Real number (E)

Unit:

m

Description:

Surface-element coil thickness.

JSON format#
JSON format from 2024.11#
    "SHELL_COIL" :
    {
        "comment" : "TYPE=4",
        "THICKNESS" : 1.0e-05
    }