Linear motor having a plurality of sensor units and a modular stator setup

Abstract

A linear motor, comprises at least one stator device () with a plurality of permanent magnets (--) of different polarity and with at least one carrier rail (), and at least one rotor device () with at least three electrical coils () and with at least one supporting means (), which can be or which is supported on the carrier rail () of the stator device (), wherein the rotor device () and the stator device () are moveable to and fro with respect to each other along a movement direction (FR) defined by the carrier rail () by interaction of magnetic fields of the permanent magnets (--) with the magnetic fields of the coils (), through which current flows if required, wherein the stator device () is formed from at least one stator module (--), wherein the stator module (--) is configured such that a stator device () with two or more consecutively arranged stator modules (--) can be formed, and wherein at the stator module (--) at least one measurement track (---) scannable by a sensor unit (--) of the rotor device () is provided, which runs substantially parallel to the movement direction (FR). On the rotor device () at least two sensor units (--) scanning the measurement track (---) are provided, which are arranged along the movement direction (FR) of the rotor device () in a distance (SA) such that if the rotor device () is arranged on a connection point (, L) between two stator modules (--) the respective measurement tracks (---) of the adjacent stator modules (--) are scannable by one of the two sensor units (--), respectively.