Patent ID: 7432622

Claim:
A method for wireless and non-contacting power and information transport in systems which include fixed and moving structural parts, comprising: supplying a three-phase motor including a stator with three-phase windings and a secondary part with three-phrase windings as a drive for the moving structural parts, wherein the three-phase windings of the stator and the three-phase windings of the secondary part are connected in a star-shaped configuration with an accessible star point, and wherein the secondary part includes a four-pulse rectifier; using a fundamental current for driving the three-phase motor; using a neutral current for the transmission of at least one of power and information via the inductive coupling between the stator and the secondary part, wherein the neutral current is three times the power supply frequency and has the same phase angle in all windings so as to induce a non-traveling time-variable field, and wherein the star point is connected so as to allow the return flow of the neutral current; and supplying devices, arranged on the moving structural parts of the system, with at least one of power and information.