Assigning a Current Density Excitation for the Eddy Current Solver
This command specifies the x-, y-, and z-components of the AC current density in a conduction path. If the current density is a function of position, the value is entered in A/m2, even if you change the units in the problem.
To define the current density:
- Select the section of the geometry (i.e., the conductor) in which you want to apply the excitation (typically a 3D object).
- Click Maxwell > Excitations > Assign > Current
Density.
The Current Density Excitation window appears. - Enter a name for the excitation in the Name box, or accept the default.
- In the Parameters section, specify the following options:
- Enter the X Component, Y Component, and Z Component values to define the respective components of the current density vector.
- Do the following in the two Coordinate System drop-down menus:
- From the first drop-down menu, select either Global or RelativeCS1 (where x = 1,2,3… if any relative coordinate systems have been defined).
- From the second drop-down menu, select Cartesian, Cylindrical, or Spherical.
- Enter the phase angle, q, of the current density in the Phase field.
- Optionally, click Use Defaults to revert to the default values in the window.
- Click OK to assign the excitation to the selected object.
To complete the current density definition, you also need to specify any related current density terminals, which must be assigned to a 2D object or face of the respective conduction path.
Note: Select the names
of the sheet objects to serve as the current density terminals. This
object must form an exact cross-section of the current density conduction
path. You must create 2D objects which represent locations where current
flows into and out of the problem region, or branches at any location
in the conduction path. In current loops, any exact 2D cross-section
may serve as a terminal.