A solenoid includes: a coil; a first fixed iron core disposed on an axial first-end side of the coil; a second fixed iron core disposed on an axial second-end side of the coil with a gap from the first fixed iron core; a tubular first movable iron core disposed between the first fixed iron core and the second fixed iron core: a second movable iron core having a tubular shape with a bottom, slidably inserted into the first movable iron core, disposed between the first fixed iron core and the second fixed iron core with a bottom portion facing the second fixed iron core; and a spring interposed between the first movable iron core and the first fixed iron core, and pressing the first movable iron core to the second fixed iron core side.

An electromechanical actuator device comprises a fixed part, a first movable part and a second movable part each arranged to move with respect to the fixed part along an actuation direction. A conductive coil (20) is wrapped around a core (28) and is housed within the fixed part (4). The first movable part (6) is coupled to the fixed part (4) by at least one restorative component (10) such that, in a working position, the first movable part (6) is separated from the fixed part (4) along the actuation direction (22) by a first actuation distance (d1). The second movable part (8) is coupled to the first movable part (6) by at least restorative component (16) such that, in the working position, the second movable part (8) is separated from the first movable part (6) along the actuation direction (22) by a second actuation distance (d2).

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.

In an electromagnetic actuator having a housing, two ferromagnetic pole shoes are distanced from each other and are rigidly connected to the housing. A mobile structure, which can be moved in the housing along an axis between two end positions, is arranged between the pole shoes, includes at least one magnet system, and is connected to a shaft that is axially displaceable in the housing. The magnet system includes at least one arrangement of at least one permanent magnet polarized radially with respect to the axis, and an annular coil connectable to a current source. The magnet system forms, together with the pole shoes, an air gap system having axially variable air gaps. The mobile structure is securable in each end position without excitation of the coil and is movable from one assumed end position into the opposite end position by excitation of the coil.

Provided are a support apparatus and a flexible device. The support apparatus comprises a support substrate, an electromagnetic support cavity array which is located on the support substrate and includes a plurality of electromagnetic support cavities, a plurality of magnetic field generation circuits, and a control module, where the magnetic field generation circuits are electrically connected to the control module, and the control module is configured to control the plurality of magnetic field generation circuits to generate magnetic fields to make the electromagnetic support cavities deform along a direction perpendicular to a plane in which the support substrate is located. Through the scheme, the electromagnetic support cavity array is provided on the support substrate, and the magnetic field generation circuits are controlled by the control module to generate magnetic fields.

The present disclosure provides a solenoid assembly that includes a static housing, a plunger disposed within the housing and translatable along an actuation axis in response to a magnetic actuation force, an intermediate element disposed within the housing and surrounding at least a portion of the plunger that is also translatable along the actuation axis in response to a magnetic actuation force. A coil arrangement is disposed within the housing and provides a first and second magnetic actuation force in response to electrical excitation thereof. The coil arrangement is arranged such that the first magnetic actuation force is configured to translate the intermediate element and the plunger together with respect to the static housing, and the second magnetic actuation force is configured to translate the plunger with respect to the intermediate element. This can improve the stroke length of the solenoid assembly.

Coil-based actuators for use in opening and closing the separable contacts of circuit interrupters provide increased initial velocity for opening strokes and damping at the end of opening strokes. Electronics for adjusting the current profile of current supplied to coil-based actuators additionally provide increased initial velocity for opening strokes and damping at the conclusion of opening strokes.

Disclosed are a solenoid actuator and a multi-stage solenoid actuator for transmitting a constant force. The solenoid actuator includes a tubular solenoid, a power unit capable of applying current to the solenoid, and a magnetic pair member having two magnetic members providing magnetic fields formed such that respective first poles thereof face each other and respective second poles thereof different from the first poles are located at both distal ends, and extending through the tub of the solenoid. The multi-stage solenoid actuator includes a solenoid assembly where at least two tubular solenoids are regularly aligned such that inner spaces of the tubes of the solenoids are arranged in series, a power unit capable of individually applying current to each solenoid of the solenoid assembly, at least one magnetic pair moveable unit having two magnetic members providing magnetic fields formed such that respective first poles thereof face each other and respective second poles thereof different from the first poles are located at both distal ends, and extending through the tub of the solenoid assembly, and a controller for determining and controlling a solenoid to receive the current from the power unit depending on a position of the magnetic pair moveable unit.

Electrical windings for a low-pressure environment are provided. The electrical windings include a body having an aperture and electrical conductors wound about the aperture in the body; a conductive layer at the body, the conductive layer arranged to electrically shield the electrical conductors; electrical connectors at one or more external sides of the body, the electrical connectors electrically connected to the electrical conductors; an insulating housing containing electrical connections between the electrical connectors and the electrical conductors; a conducting faceplate at the insulating housing, grounding portions of the electrical connectors attached to the conducting faceplate; and a conductive coating on the insulating housing, the conductive coating electrically connected to the conducting faceplate and the conductive layer.

A system (100), electromagnetic actuator (102) and track (101) for braking are provided. The actuator (102) includes pole portions (109) extending from back-iron portions. Respective longitudinal axes (104) of the pole portions (109) are arranged about parallel to one another and about perpendicular to a common movement axis (104). A pole pitch of the pole portions (109) is selected to induce eddy currents in a segmented track (101), such that the eddy currents are present in a skin depth at more than one surface of segments (105) of the segmented track (101) when the pole portions (109) are moving at given speeds. Eddy current generated losses occupy about an entirety of a volume of a segment (105) of the track (101) below a given intermediate speed, and the eddy current generated losses occupy at least one third of the volume of the segment (105) at a given maximum speed greater than the given intermediate speed. Individually controllable electrical windings are around respective pole portions (109).