Electromagnetic actuating device with ability for position detection of an armature

摘要

An electromagnetic control device has a coil with a central axis and an interior space, and a control element that moves along the axis and is arranged at least partially within an interior space of the coil. The control element comprises an armature that axially moves to a desired position when the coil is energized. The coil is divided into at least two separate portions that are arranged axially behind one another and connected electrically in series with one another. An electric central tap is provided, between two adjacent coil portions, by which a sensor current, provided for determining an axial position of the armature, can be fed into a subset of the coil portions. When the armature is in a defined axial position, an axial end face of the armature is located within an axial area determined by an axial separation zone provided between two adjacent coil portions.

主权项

1. An electromagnetic control device defining a central longitudinal axis (2) and with an electric coil (5) surrounding an inside space (4) of the coil, and comprising a control element (3) that is arranged at least partially within the inside space (4) of the coil and is movable along the central longitudinal axis (2),
the control element (3) comprising an armature (6) that is axially and variably movable by energizing the coil (5) via a movement current, the coil (5) being divided into at least two part-coils (16, 17) that are electrically connected in series by an electric connection and arranged axially adjacent one behind the other but are separated from one another, an electric central tap (23) is connected to the electric connection between the two part-coils (16, 17) and transmits a sensor current (I) into one of the two part-coils for determining an axial position of the armature (6), and when the armature (6) is in a defined axial position, an axial end face (14) of the armature (6) is within an axial area determined by an axial separation zone (18) provided between the two part-coils (16, 17).