A solenoid assembly includes a solenoid having a coil that defines a passageway and a plunger movable within the passageway from a retracted position to an extended position. The plunger extends along an axis between a first plunger end and an opposite second plunger end. A frame holds the solenoid and has a first opening through which the first plunger end extends when the plunger is in the retracted position and a second opening through second end of the plunger extends when the plunger is in the extended position. When the plunger is in the extended position the first plunger end retracts into the frame via the first opening.

Proportional electromagnetic actuator comprising: a magnetic casing; an electromagnetic plunger movable relative to the casing and having a first axial half; a first radial gap and a second radial gap which are each formed radially between the plunger and the casing, and which are positioned axially at the first axial half of the plunger. These gaps (26; 28) are formed by concentric annular chamfers (32; 34). A three-way valve for turbojet oil, which is actuated by an electromagnetic actuator with double chamfered gaps.

A solenoid operated valve includes a valve block defining a valve lumen, a poppet slidably disposed within the valve lumen, a solenoid including an annular winding with an internal surface defining a winding lumen and an external surface, and a core including a central core portion disposed within the winding lumen and an annular core portion disposed outside the external surface of the winding, and an armature including a central armature portion disposed within the winding lumen and an annular armature portion disposed outside the external surface of the winding, wherein the armature is in communication with the poppet so that movement of one is translated into movement of the other. Solenoids for such valves are provided. Also provided are methods of assembling solenoid valves.

An electromagnetic control device, in particular for adjusting camshafts or a camshaft section of an internal combustion engine, comprising an energisable coil unit, by means of which an armature mounted for movement along a longitudinal axis can be moved relative to a pole core between a retracted position and an extended position; a tappet, which is mounted for movement along the longitudinal axis with a free end portion with which, in the extended position, the tappet interacts with a camshaft in order to adjust the camshaft, and with an inner end portion (30), with which the tappet is attached to the armature, wherein the tappet is attached in a form-fitting manner to the armature by means of a deformable connection element and a method for the form-fitting attachment of a tappet to an armature of an electromagnetic control device of this kind.

A feeding unit to feed a component in an automatic manufacturing machine; has: at least one holding head designed to receive and hold the component; a closed curved guide arranged in a fixed position along an application path; an equipment supporting the holding head and provided with at least one slide coupled to the guide by a plurality of wheels; a linear electric motor, and a movable slider electro-magnetically coupled to the stator and is rigidly connected to the slide. The guide has, on the surface in contact with the wheels, a first transverse profile having a concavity or a convexity; the wheels have, on the surface in contact with the guide, a second transverse profile, which has a convexity or a concavity, and generates, with the first profile, a shape coupling between the guide and the wheels, which forbids a transverse movement of the slide relative to the guide.

A linear actuator is disclosed that is a double-ended solenoid with springs to provide much of the force for movement. The linear actuator can be used in a thermodynamic apparatus, such as a Vuilleumier heat pump in which two linear actuators are provided to drive two displacers. The linear actuator also has a cylindrical back iron section having first and second recesses with coils disposed in the recesses. The linear actuator assists in moving the armature from one end to the other and holds the armature at the end of travel. However, much of the force for moving the armature is provided by a spring exerting a force on the shaft with respect to the back iron section. In one embodiment, the spring is a compression-tension spring. Alternatively, two compression springs acting in opposition are provided.

A channel segment for a track of a mover device is provided, the channel segment comprising: opposite ends joined by a body forming a magnetic flux pathway between the opposite ends, the magnetic flux pathway being one or more of C-shaped, U-shaped and horseshoe shaped between the opposite ends, the opposite ends forming respective transverse magnetic flux pathways about perpendicular to the magnetic flux pathway; laminations of ferromagnetic material forming the body, the laminations about parallel to the magnetic flux pathway and about perpendicular to the respective transverse magnetic flux pathways; shear pins through the laminations, the shear pins positioned to reduce eddy currents one or more of in and around the shear pins; and a retention mechanism at the opposite ends, the retention mechanism configured to transversely fasten the laminations together at the opposite ends while remaining insulated from each other.

An electromagnet and method for producing the electromagnet. The electromagnet is intended to maintain pretensioning force of fastening by a force acting on a yoke over intended operating time under changing operating temperatures. The yoke encloses an armature that is provided with a flange, which conducts magnetic flux from a housing to the armature, the housing being connected on the one hand to a flange of the yoke and on the other hand to a core flange in a material-bonding manner by welding. The electromagnet can be used for actuation of valves, couplings or other electromechanical adjusting elements.

A second electric suspension device includes a second electromagnetic actuator that is provided between the vehicle body and a wheel of a vehicle and generates a driving force for damping vibration of the vehicle. The second electromagnetic actuator includes a columnar rod member and a casing surrounding the rod member and being provided capable of moving forward and backward relative to the rod member in the axial direction. Casing-side armature coils are provided in the casing in the axial direction, whereas magnets are provided in the rod member in the axial direction in such a manner as to face part of the casing-side armature coils in the casing. The magnets are formed by permanent magnets and electromagnets including rod-side armature coils.

The present disclosure provides systems and methods for an electromagnetic actuator having a unitary pole piece arranged within and coupled to a housing. The electromagnetic actuator can include the housing, the unitary pole piece, an armature received within the unitary pole piece, and an end cap. The unitary pole piece is structured to provide a reduction in air gaps within the electromagnetic actuator.