The present application disclosed a magnetic levitation system, and the magnetic levitation system includes a stator, a rotor, and a magnetic coupling mechanism; the stator includes a stator winding mechanism for controlling the rotor to move away from or close to the axis direction of the stator. The magnetic coupling mechanism includes magnetic sources, and the magnetic coupling mechanism is magnetically coupled with the rotor through the magnetic sources to drive the rotor to rotate around the axis direction of the stator. The magnetic levitation system decouples the magnetic circuit that drives the rotor to move from the magnetic circuit that drives the rotor to rotate, so as to reduce control difficulty, enhance stability, and reduce torque fluctuations.

A radial magnet actuator includes a housing having an inner space, a moving body including a mass body provided to relatively move in the inner space, and a hollow radial magnet provided in the mass body, an elastic member configured to elastically support the moving body from one side of the inner space, and a hollow coil part provided at an upper side of the inner space, with at least a portion inserted into the hollow of the radial magnet, wherein the radial magnet is magnetized in a radial direction.

A radial magnet actuator includes a housing having an inner space, a moving body including a mass body provided to relatively move in the inner space, and a hollow radial magnet provided in the mass body, an elastic member configured to elastically support the moving body from one side of the inner space, and a hollow coil part provided at an upper side of the inner space, with at least a portion inserted into the hollow of the radial magnet, wherein the radial magnet is magnetized in a radial direction.

A stator includes: a stator core including a plurality of stator teeth in a circumferential direction with respect to a center of rotation of a rotary electric machine; a stator coil disposed on a bottom portion side of each of a plurality of stator slots formed between the stator teeth; and a stator magnet disposed on an opening side of each of the plurality of stator slots and having the same polarity in a radial direction. In each of the stator slots, a plate-shaped fixing member is provided between the stator coil and the stator magnet so as to be fitted to opposed two wall surfaces of the stator slot, and a magnetic body is provided between the stator coil and the stator magnet.

A stator includes: a stator core including a plurality of stator teeth in a circumferential direction with respect to a center of rotation of a rotary electric machine; a stator coil disposed on a bottom portion side of each of a plurality of stator slots formed between the stator teeth; and a stator magnet disposed on an opening side of each of the plurality of stator slots and having the same polarity in a radial direction. In each of the stator slots, a plate-shaped fixing member is provided between the stator coil and the stator magnet so as to be fitted to opposed two wall surfaces of the stator slot, and a magnetic body is provided between the stator coil and the stator magnet.

A rotary electric machine includes a rotor, and a stator facing the rotor with a predetermined gap interposed between the rotor and stator. The stator has a stator core formed in a substantially circular annular shape and provided with an armature slot and a field slot alternately arranged in a circumferential direction, an armature winding housed in the armature slot, and a field winding and a first field magnet housed in the field slot. The armature winding generates a rotating magnetic field to rotate the rotor by being supplied with an alternating current armature current. The field winding generates a field flux by being supplied with a direct current field current. The first field magnet changes a magnetic force by the field flux.

A rotary electric machine includes a rotor, and a stator facing the rotor with a predetermined gap interposed between the rotor and stator. The stator has a stator core formed in a substantially circular annular shape and provided with an armature slot and a field slot alternately arranged in a circumferential direction, an armature winding housed in the armature slot, and a field winding and a first field magnet housed in the field slot. The armature winding generates a rotating magnetic field to rotate the rotor by being supplied with an alternating current armature current. The field winding generates a field flux by being supplied with a direct current field current. The first field magnet changes a magnetic force by the field flux.

Increase in weight of a rotary electric machine including a low-speed rotor in which a spacer made of metal is provided between a plurality of magnetic pole pieces, can be suppressed. The rotary electric machine includes a stator, a first rotor provided so as to be rotatable with respect to the stator, and a second rotor provided coaxially with the first rotor. The first rotor includes a plurality of magnetic pole pieces disposed so as to be arranged in the circumferential direction, a plurality of spacers respectively disposed between the plurality of magnetic pole pieces, two dampers respectively disposed at both end portions in the axial direction, and a fastening tool for fastening each spacer to a corresponding clamper. The spacer has a cavity portion. The spacer and the fastening tool are electrically insulated from each other.

A lens driving apparatus includes a cover member; a housing disposed inside the cover member; a bobbin disposed inside the housing so as to move in a first direction; a first coil disposed on an outer circumferential surface of the bobbin; a first magnet coupled to the housing; an upper elastic member disposed on the upper side of the bobbin and coupled to the bobbin and the housing; a base disposed on a the lower side of the housing and coupled to the cover member; a substrate disposed between the housing and the base and including a circuit member having a second coil disposed to be opposite to the first magnet; and a plurality of support members connected to the upper elastic member and the substrate. Each of the plurality of support members is disposed in the proximity of the edge of the upper elastic member, and wherein the support members are connected to the upper elastic member at a position where a length in the x direction and a length in they direction are different on the basis of the edge of the upper elastic member.

A lens driving apparatus includes a cover member; a housing disposed inside the cover member; a bobbin disposed inside the housing so as to move in a first direction; a first coil disposed on an outer circumferential surface of the bobbin; a first magnet coupled to the housing; an upper elastic member disposed on the upper side of the bobbin and coupled to the bobbin and the housing; a base disposed on a the lower side of the housing and coupled to the cover member; a substrate disposed between the housing and the base and including a circuit member having a second coil disposed to be opposite to the first magnet; and a plurality of support members connected to the upper elastic member and the substrate. Each of the plurality of support members is disposed in the proximity of the edge of the upper elastic member, and wherein the support members are connected to the upper elastic member at a position where a length in the x direction and a length in they direction are different on the basis of the edge of the upper elastic member.