Assigning a Current Density Excitation for a Magnetostatic Solver

This command specifies the x-, y-, and z-components of the current density in a conduction path. If the current density is a function of position, the value is entered in ampere/m2, even if you change the units in the problem.

To define the current density:

  1. Select the section of the geometry (i.e., the conductor) on which you want to apply the excitation (typically a 3D object).
  2. Click Maxwell > Excitations > Assign > Current Density.
    The Current Density Excitation window appears.
  3. Enter a name for the excitation in the Name box, or accept the default.
  4. In the Parameters section, specify the following options:
    1. Enter the X Component, Y Component, and Z Component values to define the respective components of the current density vector.
    2. Do the following in the two Coordinate System drop-down menus:
      • From the first drop-down menu, select either Global or RelativeCSx (where x = 1,2,3… if any relative coordinate systems have been defined).
      • From the second drop-down menu, select Cartesian, Cylindrical, or Spherical.
  5. Optionally, click Use Defaults to revert to the default values in the window.
  6. 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.

To define a current density terminal:

  1. Select the 2D object or face to which to assign the terminal.
  2. Click Maxwell > Excitations > Assign > Current Density Terminal.
    The Current Density Terminal Excitation window appears.
  3. Enter a name for the excitation in the Name box, or accept the default.
  4. Click OK to assign the excitation to the selected object.