Electromagnetic drive for switching devices

Abstract

The invention relates to an electromagnetic drive (1) for a switching device, especially a medium-voltage switching device, comprising a drive unit (2) consisting of a magnet body (5), an armature (8) which is at least partially moveably arranged therein, at least one drive magnet (5) producing a permanent magnetic drive field and at least one conductor (10) extending at least partially inside said magnetic drive field. A locking unit (3) is provided in order lock the armature (8) in at least one end position. In order to provide an electromagnetic drive which can be fixed in an end position in a simple manner, ensuring simple control thereof, the locking unit (3) comprises at least one soft magnetic moving part (15) which is firmly connected to the armature (8) and which bridges an air gap (18) for a permanent magnetic locking field in the end position of the armature (8), whereby the magnetic locking field is produced independently from the magnetic driving field by at least one locking magnet (16) which is associated with a pull-off coil (17) through which current can flow independently of the conductor in order to pull the armature out of its end position.

Description

technical field [0001] The invention relates to an electromagnetic driving device for a switch, in particular to an electromagnetic driving device for a switch applied in the technical field of medium voltage. The electromagnetic drive device has a drive unit comprising a magnetic conductor with at least one drive magnet capable of generating a permanent magnetic field, an armature at least partially movably placed in the magnetic conductor, and at least one at least partially The ground extends to the conductor in the driving magnetic field; wherein, there is also a locking unit that locks the armature in at least one end position. Background technique [0002] Such an electromagnetic drive is known, for example, from DE 198 15 538 A1. The driving device disclosed therein has a three-phase AC linear motor composed of a plurality of motor modules assembled together. The motor module consists of a number of fixed motor coils and associated moving parts moving longitudinally...

AI Technical Summary

Problems solved by technology

Reluctance drives are generally distinguished by their robust end positions, but they also have the disadvantage that their path and force characteristic curves are non-linear, which are either difficult to change by influences, or have a negative impact on the holding force load or on the end positions. Influences the load on the installation space

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