Linear motor for indicating and writing meters - has stator core embraced by induction winding, and external iron return core

摘要

Linear motor, partic. for indicating and writing measureing-instruments, comprises a stator core, an induction winding around the stator core, and an external, iron return circuit (core) between which and the winding are arranged permanently magnetised magnets perpendicular to the winding axis. The induction winding is split up into several switch-on switch-off discrete windings on the magnetic circuit open at the axial ends. The permanent manets are arranged, such that one or more stand axially opposite, and at the same height as, the series of windings, and the permanent magnets can be moved along the coils immovably arranged on the stator core. Only those discrete windings having the permanent magnets near to them have current passing through them in the working direction. The permanent magnets are specif. made of anisotropic material.