A permanent magnet motor and a compressor are provided. The motor has a rotor, a stator core, and a stator winding. A plurality of coupled coils are disposed on the stator core. The coil includes a first type coil and a second type coil. The stator winding is a three-phase stator winding. Each phase of the stator winding is provided with three joints In each phase, a first joint and a second joint are disposed on the first type coil, a third joint in the stator winding of each phase is disposed on the second type coil. The permanent magnet motor provided by the present disclosure can improve the efficiency of the motor and reduce noise.

The present embodiment of the present invention relates to a lens driving device, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet which is disposed on the housing and faces the first coil; a base disposed under the housing; a substrate which is disposed on an upper surface of the base and comprises a circuit member including a second coil facing the magnet; an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing; a support member coupled to the upper elastic member; and a terminal member elastically connecting the support member with the substrate, wherein the terminal member comprises; a first connector coupled to the substrate; and a second connector coupled to the support member; and wherein the second connector is disposed at a position lower than the first connector.

The present embodiment of the present invention relates to a lens driving device, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet which is disposed on the housing and faces the first coil; a base disposed under the housing; a substrate which is disposed on an upper surface of the base and comprises a circuit member including a second coil facing the magnet; an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing; a support member coupled to the upper elastic member; and a terminal member elastically connecting the support member with the substrate, wherein the terminal member comprises; a first connector coupled to the substrate; and a second connector coupled to the support member; and wherein the second connector is disposed at a position lower than the first connector.

There is provided a linear motor and a linear compressor including the same. The linear motor includes a stator including an air gap, a coil provided in the stator, a mover for reciprocating in the air gap, and at least one magnet fixed to the stator. In the magnet, a length in a first direction that intersects a reciprocating direction of the mover is larger than a length in a second direction that is the reciprocating direction of the mover. Therefore, it is possible to maintain or improve motor efficiency by using an amount of use of a magnet while using a low-priced magnet.

There is provided a linear motor and a linear compressor including the same. The linear motor includes a stator including an air gap, a coil provided in the stator, a mover for reciprocating in the air gap, and at least one magnet fixed to the stator. In the magnet, a length in a first direction that intersects a reciprocating direction of the mover is larger than a length in a second direction that is the reciprocating direction of the mover. Therefore, it is possible to maintain or improve motor efficiency by using an amount of use of a magnet while using a low-priced magnet.

A system and method for generating rotation of a body includes a rotating body configured to rotate about a rotation axis, at least one permanent flanking magnet and a bias object (or material non-uniformity) both arranged at least partially on or within the rotating body, and a drive or ring element. An axial gap between the ring element and the rotating body exists in an axial direction parallel to the rotation axis. The ring element may be a ferrous body, permanent magnet or electromagnet, and the bias object may be made from one or more materials of magnetic states, such as magnetic, ferromagnetic, paramagnetic, and diamagnetic or be a change in material properties of the rotating body. In some embodiments, a center of the ring element is not aligned with the rotation axis. Also, in some embodiments, the speed of, or rotational forces on, the rotating body may be adjusted by adjusting the axial gap or the magnetic field strength of the drive element and/or the flanking magnet(s) or by applying radial forces on the drive element. The rotating body may be connected to a shaft and drive an alternator to generate clean energy.

A system and method for generating rotation of a body includes a rotating body configured to rotate about a rotation axis, at least one permanent flanking magnet and a bias object (or material non-uniformity) both arranged at least partially on or within the rotating body, and a drive or ring element. An axial gap between the ring element and the rotating body exists in an axial direction parallel to the rotation axis. The ring element may be a ferrous body, permanent magnet or electromagnet, and the bias object may be made from one or more materials of magnetic states, such as magnetic, ferromagnetic, paramagnetic, and diamagnetic or be a change in material properties of the rotating body. In some embodiments, a center of the ring element is not aligned with the rotation axis. Also, in some embodiments, the speed of, or rotational forces on, the rotating body may be adjusted by adjusting the axial gap or the magnetic field strength of the drive element and/or the flanking magnet(s) or by applying radial forces on the drive element. The rotating body may be connected to a shaft and drive an alternator to generate clean energy.

An inductive power transfer system is used for transferring electrical power across a gap, such as an air gap or a liquid gap, such as to unmanned autonomous vehicles (UAVs). The power transfer system is a polyphase system that creates a travelling magnetic field in the air or liquid gap, implementing a resonant electro-magnetic (EM) field to allow larger gap separations and less precise alignments. The power transfer system may have a polyphase dynamoelectric machine attached to primary mechanical-inertial storage device with multiple stator and rotor ports connected to a polyphase traveling-wave inductive power transmitter apparatus. The system may be of use in transferring power to underwater vehicles in a subsea salt water environment. Such a power transfer system may part of a larger system for underwater power transfer, for instance at depths of at least 10 km, and/or at distances of 1 to 50 km.

An inductive power transfer system is used for transferring electrical power across a gap, such as an air gap or a liquid gap, such as to unmanned autonomous vehicles (UAVs). The power transfer system is a polyphase system that creates a travelling magnetic field in the air or liquid gap, implementing a resonant electro-magnetic (EM) field to allow larger gap separations and less precise alignments. The power transfer system may have a polyphase dynamoelectric machine attached to primary mechanical-inertial storage device with multiple stator and rotor ports connected to a polyphase traveling-wave inductive power transmitter apparatus. The system may be of use in transferring power to underwater vehicles in a subsea salt water environment. Such a power transfer system may part of a larger system for underwater power transfer, for instance at depths of at least 10 km, and/or at distances of 1 to 50 km.

A field magnet holder provided at a field portion of an electric motor is formed of a non-magnetic material. An inner wall and outer wall of the field magnet holder are respectively formed in annular shapes. Plural spacers are arranged between the inner wall and outer wall at a predetermined spacing in the circumferential direction. Sockets into which permanent magnets are inserted are formed between the spacers of the field magnet holder, plurally in the circumferential direction. Therefore, the permanent magnets may be easily assembled by being respectively inserted into the sockets. The plural permanent magnets are arrayed with magnetization directions thereof successively changed in steps of an angle that is a full cycle of electrical angles divided by a division number n, which division number n is any one integer that is at least three. Thus, ease of assembly of the permanent magnets is improved.