A bistable solenoid valve for a hydraulic brake system, includes a guide sleeve, in which an upper and a lower non-moving pole core are arranged fixedly and a closing element is arranged movably, wherein the closing element penetrates into a valve seat during a closing movement and lifts up from the valve seat during an opening movement. The closing element is connected fixedly to a permanent magnet, wherein the permanent magnet is positioned between the lower and the upper pole core. A coil group is positioned around the guide sleeve and substantially encloses the guide sleeve. The coil group includes at least two coils, wherein the coil group is configured in such a way that an actuation of a movement of the closing element takes place by means of an activation of the at least two coils.

A multi-stable solenoid includes a housing defining a first end and an opposing second end, a wire coil arranged within the housing and defining an inner coil plane defined along a radially innermost diameter of the wire coil, a first pole piece arranged adjacent to the first end of the housing, a second pole piece arranged adjacent to the second end of the housing, and an intermediate pole piece arranged axially between the first pole and the second pole. The intermediate pole piece extends radially outwardly past the inner coil plane to an outer surface. The solenoid further includes a permanent magnet arranged adjacent to the intermediate pole piece, and an armature slidably arranged within the housing and movable between two or more stable positions. Selective energization of the wire coil is configured to move the armature between the two or more stable positions.

A magnetic microactuator (100) including a coil (6; 61; 62) controlling the axial movement of a sliding block (30) including at least one permanent magnet (2) joined or aligned with a ferromagnetic or magnetised rear arbor (42) and guiding the field lines of the magnetic field of revolution in the axial direction (D) through the coil (6; 61; 62) wherein circulates the sliding block (30), up to a rear end (43) of said rear arbor (42) that tends to cooperate by magnetic attraction with at least one first ferromagnetic restoration element (8), located in the vicinity of a rear face (25) of the structure (20) of the microactuator (100), in order to bring said sliding block (30) back into a rear end-of-travel position when no coil (6; 61; 62) is powered.

An electromagnetic actuator having at least one electromagnetic actuator unit, the actuator unit comprising a coil and a plunger, which plunger is axially movable relative to the coil via energization of the coil, and the actuator unit being arranged in a housing. In order to achieve a particularly simple design, the plunger is arranged approximately coaxially with the coil according to the invention.

Embodiments are disclosed for a haptic engine module that includes AROD magnets. The AROD magnets comprise two adjacent magnets with opposite polarization and adjacent coils above and/or below the magnets. The magnets and coils are adjacent in along direction, which is the direction that is perpendicular to the vibration direction (the direction of the Lorentz force) and to the polarization direction (the direction of magnetic flux). When in operation, excitation current flows in the two coils in opposite directions. The haptic engine module can be embedded in an electronic device with an extreme aspect ratio (e.g., a touch bar of a notebook computer) to provide haptic force (e.g., vibration, click) that can be felt by a user holding or touching the electronic device.

A bistable solenoid valve for a hydraulic brake system, includes a guide sleeve, in which an upper and a lower non-moving pole core are arranged fixedly and a closing element is arranged movably, wherein the closing element penetrates into a valve seat during a closing movement and lifts up from the valve seat during an opening movement. The closing element is connected fixedly to a permanent magnet, wherein the permanent magnet is positioned between the lower and the upper pole core. A coil group is positioned around the guide sleeve and substantially encloses the guide sleeve. The coil group includes at least two coils, wherein the coil group is configured in such a way that an actuation of a movement of the closing element takes place by means of an activation of the at least two coils.

A cryogenic cooler includes a housing, and first, second, and third actuators. The first actuator includes at least one first voice coil and at least one first magnetic circuit, the at least one first voice coil of the first actuator configured to drive a compressor piston, the first actuator causing vibrations to the housing when driving the compressor piston. The second actuator includes at least one second voice coil and at least one second magnetic circuit, the at least one second voice coil of the second actuator configured to reduce the vibrations to the housing caused by driving the compressor piston. The third actuator includes at least one third voice coil and at least one third magnetic circuit, the third actuator configured to drive a displacer piston. The compressor piston, balance mechanism, and displacer piston are concentrically formed within the cryogenic cooler.

In a fuel injection device, a driving unit structure has a magnetic aperture, in which an inner diameter is gradually enlarged toward the mover side, provided in an inner peripheral surface of the magnetic core. It is possible to reduce magnetic delay time upon valve opening from the supply of the electric current to the coil to the rise of magnetic flux and magnetic delay time upon valve closing from the stoppage of the electric current to the coil to reduction of magnetic flux, by providing a magnetic aperture in the inner peripheral surface of the magnetic core. Thus it is possible to improve the dynamic responsiveness upon valve opening and valve closing.

An electromagnetic actuator comprising a moving armature (41) comprising a pin (43) and a permanent magnet arrangement (45) arranged coaxially with the pin (43) and secured to it, and an excitation coil arrangement (42) arranged coaxially with the pin (43). The coil arrangement (42) is suppliable with a current to cause a movement of the movable armature (41). The actuator further comprises a surface (51) of ferromagnetic material. The permanent magnet arrangement (45) is axially interposed between the surface (51) of ferromagnetic material and the excitation coil arrangement (42). The permanent magnet arrangement (45) comprises a plurality of permanent magnet regions (45a) arranged around the pin (43) of the moving armature (41), wherein each permanent magnet region (45a) has a polarity opposite to the polarities of the permanent magnet regions (45a) angularly adjacent thereto. The excitation coil arrangement (42) comprises a coil having a lobed shape.

A planar actuator device, including a base plate including a first, second, and third pair of planar coils, each pair of planar coils having an inner coil and an outer coil, each pair of planar coils arranged along a first, second, and third linear motion axis, respectively, the first, second, and third linear motion axis arranged in a star configuration, and an actuation mechanism including a first, second, and third planar legs and a centerpiece, the first, second and third planar legs pivotably connected to the centerpiece, the planar legs including a first, second, and third sliding element and a first, second, and third middle section, respectively, a sliding element and middle section of a respective leg pivotably connected to each other, each sliding element including a permanent magnet.