Generalization of 3D eddy current analysis for moving conductors due to coordinate systems and gauge conditions

The paper presents a variation of the 3D eddy current analysis for moving conductors with two parameters. One is the velocity of the coordinate systems and the other is the gauge conditions which specify the electromagnetic potentials. The general formulation due to these parameters is obtained and numerical experiments are carried out. The edge finite elements and the backward difference method are applied to the formulations. It is clarified that the potentials are determined by both of these parameters and that a proper relation between the parameters is required to analyze the conductors sliding in electrical contact. When we analyze electrical machines including moving conducting parts, for example, induction motors and rail launchers.