Assigning a Resistive Sheet Boundary for the Transient Solver

When two conductors are in contact within a conduction path, a voltage drop normally exists across the contact surface due to the imperfection of the contact between the two conductors. This voltage drop should be taken into account when the winding is a voltage excitation. This boundary condition assigns a resistive sheet to consider the impact of this kind of voltage drop. The resistive sheet is defined by a lumped resistance in ohms.

To assign a resistive sheet boundary:

1. Select the section of the geometry on which you want to apply the boundary condition (typically a sheet object or face of a 3D conducting body touching another conducting body).

   Note:

   • The sheet must have conductors touching both of its faces.
   • The sheet can not be smaller than the contacting surface.
   • The sheet cannot span multiple faces.
2. Click Maxwell > Boundaries > Assign > Resistive Sheet..
3. In the Resistive Sheet window that opens, enter a name for the boundary in the Name box, or accept the default.
4. Enter a resistance value in the Resistance box and select the unit of measure, or accept the default (1 ohm).
5. Optionally, the Defaults tab allows you to save the current resistance value for future use, and to revert to the standard defaults.
6. Click OK to assign the boundary to the selected object.