A linear motor includes a housing; a vibrating assembly arranged in the housing, the vibrating assembly including coils, a weight and a connecting piece connecting the coils with the weight; a magnet assembly connecting with the housing, the magnet assembly including a first magnet group and a second magnet group; a magnetic gap formed between the first magnet group and the second magnet group for at least partially receiving the coils; and an elastic connecting piece supporting the vibrating assembly in the housing elastically. The first magnet group and the second magnet group comprise at least one pair of magnets which are arranged oppositely to each other and have opposite magnetizing directions; and magnetizing directions of the magnets at the corresponding locations in the first magnet group and the second magnet group are the same.

A linear motor includes a housing; a vibrating assembly arranged in the housing, the vibrating assembly including coils, a weight and a connecting piece connecting the coils with the weight; a magnet assembly connecting with the housing, the magnet assembly including a first magnet group and a second magnet group; a magnetic gap formed between the first magnet group and the second magnet group for at least partially receiving the coils; and an elastic connecting piece supporting the vibrating assembly in the housing elastically. The first magnet group and the second magnet group comprise at least one pair of magnets which are arranged oppositely to each other and have opposite magnetizing directions; and magnetizing directions of the magnets at the corresponding locations in the first magnet group and the second magnet group are the same.

A magnetic momentum transfer generator utilizes three or more magnets aligned with each other. A first control magnet is positioned outside a coil. A second magnet is positioned within the windings of the coil and a third magnet is positioned on the opposite side of the coil opposite the control magnet. When the control magnet rotated or moved, mutual magnetic flux lines generated by all three magnets and passing through the coil winding are aligned at right angles to the coil, thereby inducing a maximum voltage at the terminals. This generator is particularly use for short burst radio micro-transmitters that can be used for battery-less and wireless switching applications.

A linear vibration generator including a plate type spring each having bent portions includes: a case for covering top and side portions thereof; a bracket coupled to the underside of the case; a coil fixed to one side of a top surface of the bracket and receiving external power from an FPCB; a plate type spring having bent portions and configured to allow one end thereof to be fixed to a vibrator; and the vibrator having a weight fixed to one end of the plate type springs and a magnet insertedly fixed to a hollow portion of the weight.

A linear vibration motor is disclosed. The linear vibration motor includes a housing; a vibrating unit in the housing, the vibrating unit including a magnet; a plurality of elastic members suspending the vibrating unit elastically in the housing; a drive coil positioned opposed to the magnet for driving the vibrating unit to vibrate along a first direction; a Hall sensor fixed on the housing and facing the magnet for detecting displacement of the vibrating unit along a direction vertical to the first direction; and a braking coil arranged on the housing and surrounding the Hall sensor for reacting upon the vibrating unit in accordance with the displacement detected by the Hall sensor in order to adjust the displacement of the vibrating unit vertical to the first direction.

A linear vibration motor is disclosed. The linear vibration motor includes a housing; a vibrating unit in the housing, the vibrating unit including a magnet; a plurality of elastic members suspending the vibrating unit elastically in the housing; a drive coil positioned opposed to the magnet for driving the vibrating unit to vibrate along a first direction; a Hall sensor fixed on the housing and facing the magnet for detecting displacement of the vibrating unit along a direction vertical to the first direction; and a braking coil arranged on the housing and surrounding the Hall sensor for reacting upon the vibrating unit in accordance with the displacement detected by the Hall sensor in order to adjust the displacement of the vibrating unit vertical to the first direction.

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.

Systems and methods for securing coils of magnet wire to a support core in a linear motor that is used, for example, in an ESP. A hollow member such as a cylindrical metal tube is provided as a support core which is adapted to receive a mover of the linear motor. Coils of magnet wire are positioned at the exterior of the support core (e.g., wound around the core). An outer layer of shrink-wrap material is placed around the support core and coils and is heated, causing it to shrink and conform to the coils and the support core. The shrink-wrap material provides pressure against the coils which holds them securely against the support core. This assembly is then positioned within a stator housing and secured to form the stator for the linear motor.

Systems and methods for securing coils of magnet wire to a support core in a linear motor that is used, for example, in an ESP. A hollow member such as a cylindrical metal tube is provided as a support core which is adapted to receive a mover of the linear motor. Coils of magnet wire are positioned at the exterior of the support core (e.g., wound around the core). An outer layer of shrink-wrap material is placed around the support core and coils and is heated, causing it to shrink and conform to the coils and the support core. The shrink-wrap material provides pressure against the coils which holds them securely against the support core. This assembly is then positioned within a stator housing and secured to form the stator for the linear motor.

A vibration generator including a coil, a plunger including a first shaft and a second shaft, and a frame. The first shaft is received in the coil such as to be movable in a first direction. The second shaft extends in a second direction orthogonal to the first direction, is disposed on the other side in the first direction relative to the coil with a gap therebetween. The first and second shafts are partly made of a magnetic material so as to be magnetically attractable to the coil and thereby movable to one side in the first direction. The frame is fixed to the first and second shafts at positions on the one and other sides, respectively, in the first direction relative to the coil, and elastically deformable at least partly as a result of movement of the first and second shafts.