Method for identifying a secondary part (20a, 20b, 20c ...) during use in a linear-motor-based system , - wherein a primary part 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 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 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 , - for the purpose of identifying the rotor, selected primary-part coils (11, 12, 13...) are energized (S1) using a primary current at one or more test signal frequencies in order to induce (S2) 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 (S3) a current response of the primary-part coils (11, 12, 13...) and the characteristic property is measured (S4) using the current response. - wherein a primary part 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 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 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 , - for the purpose of identifying the rotor, selected primary-part coils (11, 12, 13...) are energized (S1) using a primary current at one or more test signal frequencies in order to induce (S2) 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 (S3) a current response of the primary-part coils (11, 12, 13...) and the characteristic property is measured (S4) using the current response. <EOS>