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The numerical simulation of electromagnetic devices with motion by the finite-element method requires some method to couple the fixed and moving parts. Improvements in automatic meshing techniques have enabled a gap remeshing method to be included in the finite-element analysis package OPERA-3d/CARMEN to achieve this coupling. This method allows devices, such as motors, with complex air gap geometries to be modelled and has some advantages over other techniques which can be employed. The gap remeshing approach is demonstrated for an axial flux permanent magnet motor where the open circuit back e.m.f. characteristics of the motor are presented.