3D finite element dynamic simulation of electrical machines coupled to external circuits

This paper describes a 3D finite element scheme for use in dynamic simulations of electromagnetic devices with moving parts connected to an external circuit. The scheme handles source coils through a special coil region based on the magnetic scalar representation with an additional basis for each coil. The finite element model can be directly coupled to external circuits and motion of moving parts within the model is handled by using a Lagrange sliding interface technique.