Transient BEM-FEM coupled analysis of 3-D electromechanical systems: a watch stepping motor driven by a thin wire coil

This paper deals with the transient numerical analysis of electromechanical devices driven by thin wire coils. The dynamic behaviour is described by Maxwell's equations, by the constitutive equations, and by the equations of motion. For the solution of the electromagnetic problem the BEM-FEM coupling method is used. A 3-D watch stepping motor is presented as an example.