ACTUATOR FOR MEDIUM VOLTAGE SWITCHGEAR

摘要

An actuator for a switchgear is disclosed, which can include a core having a package of core element layers made of magnetic material, and permanent magnets between the core elements, fixed with screws with screwheads. A movable plate is configured to open or close a magnetic circuit to the core, and an electromagnetic coil is surrounded by the core elements. To avoid mechanical infringement of the environment of the actuator by prominent screwheads, without weakening the magnetic force, screws for mechanical connection of the core element layers and the permanent magnets can be oriented perpendicular to the plane of stacking of the core element layers, and screw-holes for the screws can be implemented through the core element layers and the permanent magnets, and the screw-holes can end in diameter extended openings, so that the screwheads and/or the screwnuts are recessed into the diameter extended openings.

主权项

1. An actuator for a switchgear, comprising:
a core including a package of core element layers made of magnetic material with permanent magnets between the core element layers; a movable plate made of magnetic material, the movable plate configured to open or close a magnetic circuit to the core; an electromagnetic coil, which is surrounded by the core elements; a central actuator rod; and at least one screw for mechanical connection of the core element layers and the permanent magnets, wherein the at least one screw is oriented perpendicular to a plane of stacking of the core element layers, and a screw-hole for each at least one screw is implemented through the core element layers and the permanent magnets, and wherein the screw-hole ends in a diameter extended opening, so that a screwhead of the screw is positioned and recessed into the diameter extended opening.