Method for identifying a secondary part (20a, 20b, 20c...) during use in a linear-motor-based system, - wherein a primary part (10, 101, 102) having primary-part coils (11, 12, 13...) is provided in the linear-motor-based system, - wherein the secondary part (20a, 20b, 20c...) has a magnetic active part (21a, 21b) for forming a secondary-part magnetic field and the primary-part coils (11, 12, 13...) can be actuated using a drive current in such a way that an advancing force acting on the secondary part (20a, 20b, 20c...) and a movement of the secondary part (20a, 20b, 20c...) along the primary part (10, 101, 102) can be achieved, wherein - at least one secondary-part winding (22a, 22b, 22c...) in a circuit is provided on the secondary part (20a, 20b, 20c...), wherein a winding axis of the secondary-part winding (22a, 22b, 22c...) is provided in a d-axis prescribed by the magnetic active part (21a, 21b), - for the purpose of identifying the rotor, selected primary-part coils (11, 12, 13...) are energized using a primary current at one or more test signal frequencies in order to induce a secondary current in the secondary-part winding (22a, 22b, 22c...), characterized in that for the purpose of identification, the selected primary-part coils (11, 12, 13...) are energized using a primary current, which leads to an alternating magnetic field in the direction of the winding axis of the secondary-part winding (22a, 22b, 22c...), - a characteristic property of the secondary-part winding (22a, 22b, 22c...) or of the circuit is representative of the secondary part (20a, 20b, 20c...), - the secondary current influences a current response of the primary-part coils (11, 12, 13...) and the characteristic property is measured using the current response. - wherein a primary part (10, 101, 102) having primary-part coils (11, 12, 13...) is provided in the linear-motor-based system, - wherein the secondary part (20a, 20b, 20c...) has a magnetic active part (21a, 21b) for forming a secondary-part magnetic field and the primary-part coils (11, 12, 13...) can be actuated using a drive current in such a way that an advancing force acting on the secondary part (20a, 20b, 20c...) and a movement of the secondary part (20a, 20b, 20c...) along the primary part (10, 101, 102) can be achieved, wherein - at least one secondary-part winding (22a, 22b, 22c...) in a circuit is provided on the secondary part (20a, 20b, 20c...), wherein a winding axis of the secondary-part winding (22a, 22b, 22c...) is provided in a d-axis prescribed by the magnetic active part (21a, 21b), - for the purpose of identifying the rotor, selected primary-part coils (11, 12, 13...) are energized using a primary current at one or more test signal frequencies in order to induce a secondary current in the secondary-part winding (22a, 22b, 22c...), characterized in that for the purpose of identification, the selected primary-part coils (11, 12, 13...) are energized using a primary current, which leads to an alternating magnetic field in the direction of the winding axis of the secondary-part winding (22a, 22b, 22c...), - a characteristic property of the secondary-part winding (22a, 22b, 22c...) or of the circuit is representative of the secondary part (20a, 20b, 20c...), - the secondary current influences a current response of the primary-part coils (11, 12, 13...) and the characteristic property is measured using the current response.