Matching Boundary for a Magnetostatic Field Solution

Matching boundaries allow you to model planes of periodicity where the H-field on one surface exactly matches the H-field on another. They force the magnetic field at each point on one surface (the "independent" boundary) to match the magnetic field at each corresponding point on the other surface (the "independent" boundary). They are very useful for modeling devices such as motors, in which the magnetic field repeats every 180^°, 120^°, 90^°, or less. Basically, they enable you to model the smallest possible periodic segment of the device – reducing the amount of computing resources needed during the solution.

To set up matching boundaries, you must create both an independent boundary and a dependent boundary. Unlike Symmetry boundaries, H does not have to be tangential or normal to these boundaries. The only condition is that the fields on the two boundaries must have the same magnitude and direction (or the same magnitude and opposite directions).