Linear drive device provided with an armature body having a magnet carrier

Abstract

A linear drive device includes an excitation winding producing a variable magnetic field and including an associated magnetic-flux-carrying yoke body having pole surfaces, and an armature body including a magnet carrier having at least two permanent magnet parts and an axial oscillation movement being transferable to the at least two permanent magnet parts by the variable magnetic field of the excitation winding. The magnet carrier includes an electrically insulating material at least partially extending into the magnetic field area defined by the pole surfaces of the yoke body and the excitation winding.

1 . A linear drive device comprising:
 an excitation winding producing a variable magnetic field and including an associated magnetic-flux-carrying yoke body having pole surfaces; and   an armature body including a magnet carrier having at least two permanent magnet parts and an axial oscillation movement being transferable to the at least two permanent magnet parts by the variable magnetic field of the excitation winding, the magnet carrier including an electrically insulating material at least partially extending into the magnetic field area defined by the pole surfaces of the yoke body and the excitation winding.   
     
     
         2 . The device of  claim 1 , wherein the magnet carrier consists entirely of an insulating material. 
     
     
         3 . A linear drive device comprising:
 an excitation winding producing a variable magnetic field having a longitudinal extent along a longitudinal axis, the excitation winding including an associated magnetic-flux-carrying yoke body having a pair of pole surfaces axially spaced from one another relative to the longitudinal axis; and   an armature body including a magnet carrier having a plurality of permanent magnet parts and a pair of electrically insulating portions, the armature body being movable in an axial oscillation movement that is transferable to the at least two permanent magnet parts by the variable magnetic field of the excitation winding, the pair of electrically insulating portions being axially spaced from one another relative to the longitudinal axis and at least one of the plurality of permanent parts is disposed axially intermediate the pair of electrically insulating portions, and each one of the pair of electrically insulating portions is disposed to at least partially extend into a respective magnetic field area defined by a respective one of the pair of pole surfaces of the yoke body and the excitation winding.   
     
     
         4 . The device of  claim 3 , wherein the magnet carrier consists entirely of an insulating material.