Assigning a Magnetic H Field for the Eddy Current Solver

This type of boundary defines external magnetic fields in a model. Assign it only to the outer surfaces of the problem region. Regardless of the model's drawing units, magnetic field values are entered in s/m.

Warning: When using tangential magnetic field boundary conditions, always double-check that Ampere's law is not violated!

To define a zero tangential H field boundary:

  1. Select the section of the geometry on which you want to apply the boundary condition (typically a face).
  2. Click Maxwell > Boundaries > Assign > Zero Tangential H Field.
    The Zero Tangential H Field window appears.
  3. Enter a name for the boundary in the Name box, or accept the default.
  4. Click OK to assign the boundary to the selected object.

To define a tangential H field boundary:

  1. Select the section of the geometry on which you want to apply the boundary condition.
  2. Click Maxwell > Boundaries > Assign > Tangential H Field.
    The Tangential H Field window appears.
  3. Enter a name for the boundary in the Name box, or accept the default.
  4. In the Parameters section, enter the value of the field component in the x-direction in the U(X) box and the value of the field component in the y-direction in the V(Y) box.
  5. In the Coordinate System section, do the following define the vectors:
    1. Select New Vector from the U Vector drop-down menu.
      The Create Line message appears asking you to draw the U vector of the coordinate system in the plane of the selected face.
    2. Click two points to specify the vector.
      The vector is set, and the Tangential H Field window reappears, with Defined listed for U Vector.
    3. To reverse the direction of the vector, click the Reverse Direction check box.
  6. Optionally, click Use Defaults to revert to the default values in the window.
  7. Click OK to assign the boundary to the selected object.

The new boundary is added to the boundary list in the Project Manager tree.