Location of a secondary part during use in a linear-motor-based system

A method for locating a secondary part during use in a linear-motor-based system, at least one primary part having primary-part coils being provided in the linear-motor-based system, the secondary part having a magnetic active part for forming a secondary-part magnetic field and the at least one primary-part coil is actuatable via a drive current such that a primary-part magnetic field forms to achieve an advancement of the secondary part, at least one secondary-part winding being provided on the secondary part and an induction of a secondary current in the secondary-part winding at a test frequency causing a change in the inductance of a primary-part coil situated in spatial proximity to the secondary part, the method comprising:

• energizing the at least one primary part via a primary current at the test frequency to locate the secondary part;
• inducing the secondary current based on the energized at least one primary part via the primary current at the test frequency;
• and measuring respective current responses of the primary-part coils;
• wherein measured current changes in the current responses indicate the change in the inductance of the respective primary-part coil and a relative position of a secondary part to the respective primary-part coil;
• and wherein the primary-part coils of the at least one primary part are energized via the primary current,
• a secondary part being in the spatial proximity of said primary-part coils.