A vibration power generator includes a coil attached to a frame and a moving body that is supported on the frame through a spring and has a magnet facing the coil, and relatively moves the moving body with respect to the coil to generate electric power. The moving body has the magnet, a yoke material that is attached to the magnet and forms a magnetic circuit, and a weight member. Average specific gravity of the moving body is 8 g/cm.sup.3 or more.

A movable core-type reciprocating motor and a compressor having a movable core-type reciprocating motor are provided. The motor may include a stator including an inner stator and an outer stator; a magnet coil wound between the inner stator and the outer stator; a magnet fixed to at least one of the inner stator or the outer stator so as to be at least partially positioned within a range of the air gap; and a mover including at least one movable core disposed in the air gap and made of a magnetic material to perform a reciprocation movement with respect to the stator and the magnet and a connection member made of a non-magnetic material and configured to support the at least one movable core.

A movable core-type reciprocating motor and a compressor having a movable core-type reciprocating motor are provided. The motor may include a stator including an inner stator and an outer stator; a magnet coil wound between the inner stator and the outer stator; a magnet fixed to at least one of the inner stator or the outer stator so as to be at least partially positioned within a range of the air gap; and a mover including at least one movable core disposed in the air gap and made of a magnetic material to perform a reciprocation movement with respect to the stator and the magnet and a connection member made of a non-magnetic material and configured to support the at least one movable core.

Provided are a moving core-type reciprocating motor and a reciprocating compressor having the same. The moving core-type reciprocating motor includes a stator including an inner stator and an outer stator having one side connected to one side of the inner stator and the other side spaced apart from the other side of the inner stator in a radius direction to define a gap together with the other side of the inner stator, a magnet coil wound between the inner stator and the outer stator, a magnet fixed to at least one of the inner stator and the outer stator so as to be exposed to the gap, a rotor including a moving core disposed in the gas and made of a magnetic material to reciprocate with respect to the stator and the magnet and a hollow connection member made of a nonmagnetic material and supporting the moving core so that the moving core is exposed to the gap toward the magnet. Thus, the reciprocating motor and the reciprocating compressor having the same are compact and lightweight to more improve efficiency.

Provided are a moving core-type reciprocating motor and a reciprocating compressor having the same. The moving core-type reciprocating motor includes a stator including an inner stator and an outer stator having one side connected to one side of the inner stator and the other side spaced apart from the other side of the inner stator in a radius direction to define a gap together with the other side of the inner stator, a magnet coil wound between the inner stator and the outer stator, a magnet fixed to at least one of the inner stator and the outer stator so as to be exposed to the gap, a rotor including a moving core disposed in the gas and made of a magnetic material to reciprocate with respect to the stator and the magnet and a hollow connection member made of a nonmagnetic material and supporting the moving core so that the moving core is exposed to the gap toward the magnet. Thus, the reciprocating motor and the reciprocating compressor having the same are compact and lightweight to more improve efficiency.

Disclosed herein are various wireless power electropermanent magnets and related systems and devices, including handheld wands for activating and deactivating wireless power electropermanent magnets, and coupling and locking mechanisms utilizing wireless power electropermanent magnets.

Disclosed herein are various wireless power electropermanent magnets and related systems and devices, including handheld wands for activating and deactivating wireless power electropermanent magnets, and coupling and locking mechanisms utilizing wireless power electropermanent magnets.

A secondary part, which defines a magnetic path for a primary part of a linear motor, includes a spacer element having a plurality of mounting points that, in an application, are configured to fasten the secondary part. Two yoke plates that form lateral sides are configured to be fastened to the spacer element such that the two yoke plates extend in mutual opposition, orthogonally to the magnetic path. The two yoke plates are configured to accommodate a plurality of permanent magnets on respective inner sides thereof. The two yoke plates have, on respective outer sides thereof, a reinforcing structure that is formed by a periodic variation of plate thickness in the direction of the magnetic path. Local minima of the reinforcing structure overlapping with the mounting points along the direction of the magnetic path.

A haptic transducer comprising a magnetic plate, a plurality of coils each separately couplable to a signal generator such that axis of each coil is perpendicular to the plate and all coils are on a common side of the plate, and signals may be sent from said signal generator to each coil individually.

A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.