A rotary reciprocating driving actuator includes: a movable member including a shaft part and a magnet; and a fixing body including a core assembly including a magnetic pole core with an integral structure including a plurality of magnetic poles, a plurality of coils disposed next to the plurality of magnetic poles, and a magnetic path core to which the magnetic pole core is assembled, wherein the core assembly is disposed such that the plurality of magnetic poles faces an outer periphery of the magnet, wherein a magnetic flux that passes through a magnetic path configured of the magnetic path core and the magnetic pole core of the integral structure is generated through energization of the plurality of coils, and the movable member is rotated back and forth around an axis of the shaft part through electromagnetic interaction of the magnetic flux and the magnet.

Disclosed herein is the structure of a separate coil mounting-type coaxial exciter. In the structure of a separate coil mounting-type coaxial exciter, a first body equipped with a first coil, which is an inner coil, and a second body equipped with a second coil, which is an outer coil, are independently separated from each other, the second body has a larger diameter than the first body, each of the first and second bodies has a shape in which the rim thereof extends up and down, and the first coil is joined to the bottom surface of the first body, and the second coil is joined to the bottom surface of the second body.

Disclosed herein is the structure of a separate coil mounting-type coaxial exciter. In the structure of a separate coil mounting-type coaxial exciter, a first body equipped with a first coil, which is an inner coil, and a second body equipped with a second coil, which is an outer coil, are independently separated from each other, the second body has a larger diameter than the first body, each of the first and second bodies has a shape in which the rim thereof extends up and down, and the first coil is joined to the bottom surface of the first body, and the second coil is joined to the bottom surface of the second body.

A haptic engine includes a haptic actuator having a double-wound driving coil in which the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in which the two windings are connected with each other in series, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding, and without having to sense a driving current through the double-wound driving coil. By using the double-wound driving coil in which the two windings are connected with each other in parallel, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.

A haptic engine includes a haptic actuator having a double-wound driving coil in which the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in which the two windings are connected with each other in series, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding, and without having to sense a driving current through the double-wound driving coil. By using the double-wound driving coil in which the two windings are connected with each other in parallel, an instant back EMF voltage induced in either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.

A linear actuator, and a tufting machine including the linear actuator are provided. The linear actuator includes a casing, a magnet unit, and a coil unit. The magnet unit includes a magnet and a magnet mounting plate. The magnet is configured to sandwich side surfaces of the magnet mounting plate. The coil unit faces the magnet. The magnet unit is configured to reciprocate along an axial direction in the casing, between the coil unit, based on magnetization and demagnetization of the coil unit.

Provided is an electric motor combined with a power generator comprising: a fixed coil plate in which separate coil bodies are uniformly arranged; and a reciprocating magnet plate in which separate magnets are uniformly arranged. The installation location of the electric motor combined with a power generator is not restricted by linearly or rotationally moving equipment. In addition, the electric motor combined with a power generator enables coils and magnets to be regularly and closely arranged in the coil plate and the magnet plate, thereby minimizing loss of the locomotive force. Furthermore, when performing a reciprocating movement to which an inertial force is added, the electric motor combined with a power generator enables electric current to be instantly broken and converted and supplied by sensing of sensors, while implementing a strong reciprocating movement due to an increase of speed by means of the compression and repulsive force of a spring.

Provided is an electric motor combined with a power generator comprising: a fixed coil plate in which separate coil bodies are uniformly arranged; and a reciprocating magnet plate in which separate magnets are uniformly arranged. The installation location of the electric motor combined with a power generator is not restricted by linearly or rotationally moving equipment. In addition, the electric motor combined with a power generator enables coils and magnets to be regularly and closely arranged in the coil plate and the magnet plate, thereby minimizing loss of the locomotive force. Furthermore, when performing a reciprocating movement to which an inertial force is added, the electric motor combined with a power generator enables electric current to be instantly broken and converted and supplied by sensing of sensors, while implementing a strong reciprocating movement due to an increase of speed by means of the compression and repulsive force of a spring.

An actuator includes a first magnet whose magnetic pole surface has an N pole and a second magnet whose magnetic pole surface has an S pole. When current flows from one end of a first wiring to the other end, the current circulates in one direction at least partially on the first magnet in a first area, while it circulates in a direction opposite to the one direction at least partially on the second magnet in the first area. When current flows from one end of a second wiring to the other end, the current circulates in the direction opposite to the one direction at least partially on another first magnet in the second area, while it circulates in the one direction at least partially on another second magnet in the second area.

An embodiment of the invention provides a linear vibration motor. The linear vibration motor includes a base with a containing space, a vibration unit arranged in the containing space, an elastic piece suspending the vibration unit in the containing space, and a magnet assembly fixed to the base and driving the vibration unit to vibrate. The vibration unit includes a weight, a containing groove penetrating through the weight and at least one pair of coils which are oppositely fixed to the weight. The magnet assemblies has two magnets which are respectively fixed on two opposite sides of the base. The two magnets are at least partially located in the containing grooves, and are magnetized in the vibration direction. Compared with the related art, the linear vibration motor is improved in vibration performance and reliability.