An electromagnetic actuator including a coil; a non-movable part constituted by a magnetic substance and disposed on one side relative to the coil; and a movable part including a permanent magnet on the other side relative to the coil. Applying a current to the coil alternately generates first and third driving forces to move the magnet and the movable part to one and the other sides in a first direction relative to the coil and the non-movable part. As the movable part moves from a neutral position to the one side in the first direction, a portion of the magnet positioned on the one side in the first direction relative to the first end of the first non-movable part gradually enlarges and is magnetically attracted toward the non-movable part. As the movable part moves from the neutral position to the other side in the first direction, a portion of the magnet positioned on the other side in the first direction relative to the second end of the first non-movable part gradually enlarges and is magnetically attracted toward the non-movable part.

A camera module includes a movable portion including a lens barrel, an accommodating portion configured to receive the movable portion, and a driving unit configured to drive the movable portion, comprising a driving magnet integrated with the movable portion. A cross-sectional area of the driving magnet decreases as a distance thereof from an optical axis increases.

A bi-stable soft electromagnetic actuator includes a housing including a frame portion formed of a stretchable elastic body, a stretchable coil portion generating an electromagnetic field by applied power, located in the housing, and having a first surface and a second surface facing in mutually opposite directions, and at least a pair of permanent magnet portions respectively facing the first surface and the second surface of the stretchable coil portion and arranged to maintain a distance by the frame portion.

An actuator assembly includes a first actuator, a second actuator, and a moving piece that is disposed between the first actuator and the second actuator. The moving piece is positionable to close a gap in the compressor.

An actuator includes a support body, a movable body, a connection body, and a magnetic drive mechanism having a coil and a magnet for relatively moving the support body and the movable body. A winding part of the coil includes effective side portions, a first curved side portion connecting one side ends of the effective side portions, and a second curved side portion connecting the other side ends of the effective side portions. The magnet faces the effective side portions of the coil. A yoke fixed to the magnet includes a first yoke, a second yoke, a one side connection yoke and the other side connection yoke connecting the first yoke with the second yoke, and the one side connection yoke and the other side connection yoke are provided at positions so as not to overlap with the effective side portions and the magnet.

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.

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.

There is a substrate transfer apparatus comprising: a circular tube having a tube axis extending in a lateral direction and having a transfer region for a substrate in the circular tube; a magnetic field generating portion having a magnetic field generating surface facing the transfer region and configured to generate a magnetic field on the magnetic field generating surface; and a transfer body configured to transfer the substrate while moving in a plane direction of the magnetic field generating surface in a state that the transfer body is distant from the magnetic field generating surface by the magnetic field.

A reluctance transducer includes a soft ferromagnetic yoke and a soft ferromagnetic core element, which is movable relative to the yoke. Two permanent magnets bear the core element. The permanent magnets are arranged relative to each other and to the yoke so that the reluctance transducer has a good linear relationship between displacement and force. The reluctance transducer can be applied as stiffness compensating element. The reluctance transducer can include an electrical winding to allow its application as a magnetic bearing, an actuator or as a displacement, velocity or acceleration sensor with improved intrinsic linearity.

An electromagnetic holding magnet and a method for manufacturing the same, and an electromagnetic locking element that, that in a preferred embodiment, is a lock in a container of an oxygen emergency supply system of an aircraft. The electromagnetic holding magnet includes a yoke and a retaining plate interacting with the yoke as an anchor. At least one permanent magnet generates a magnetic retaining flux in the yoke that includes a first yoke leg and a second yoke leg as well as a middle pole. The middle pole is surrounded in sections by a magnetic coil. The first and second yoke legs are arranged symmetrically in relation to the middle pole and the magnetic coil.