ELECTROMAGNETIC LINEAR ACTUATOR

摘要

The invention relates to an electromagnetic linear actuator. According to one example of the invention, the linear actuator comprises a frame (stator), which is at least partially made of soft magnetic material, and an armature, which is at least partially made of soft magnetic material and which is supported on the frame in such a way that the armature can be moved relative to the frame along a longitudinal axis. The armature and the frame are designed in such a way that there is gap between the armature and the frame along the longitudinal axis in an open position and that the armature and the frame lie against each other in a closed position so that the gap is closed. A first armature coil is connected to the armature in such a way that a force acting on the first armature coil can be transmitted to the armature. The linear actuator further comprises means for generating an excitation magnetic field, which is guided at least partially by the frame and the armature and is directed in such a way that a force acts on the first armature coil when current flows through the first armature coil, and said force is transmitted to the armature in order to close the gap. The frame, the armature, and the excitation magnetic field are designed in such a way that a retaining force takes effect when the gap between the frame and the armature is closed.