A tool changer in accordance with the present disclosure comprises: a housing fastened to a manipulator of a robot, wherein the housing is a non-magnetic material; a bar-shaped magnet disposed in the housing; a motor configured to rotate the magnet on a rotation shaft perpendicular to a longitudinal direction of the magnet; and a core configured to derive a path of a magnetic flux by the magnet. The core comprises: a pair of first poles facing both poles of the magnet, when the magnet rotates to be elongated in a first direction; a bridge configured to connect the pair of the first poles and disposed in the housing, wherein the bridge is a magnetic material; a pair of second poles facing the both poles of the magnet, when the magnet rotates to be elongated in a second direction perpendicular to the first direction; and a pair of terminals connected to the second poles and facing a magnetic body disposed outside the housing.

Disclosed is a galvanometer motor apparatus. The galvanometer motor apparatus includes a housing, a stator assembly, and a rotor assembly, wherein the rotor assembly includes an axle and a magnet that are coaxially arranged, and the stator assembly includes a frame and a single electromagnetic coil wound on the frame; wherein a first through hole configured to allow the magnet to rotatably run through is molded on the frame, the electromagnetic coil is disposed on a side of the first through hole, the electromagnetic coil is excitable to generate a drive magnetic field to magnetize the frame to supply a torque to the magnet, a recess configured to receive the stator assembly is molded in the housing. With such configurations, structure design is optimized, assembling is simpler, and efficiency is higher.

Disclosed is a galvanometer motor apparatus. The galvanometer motor apparatus includes a housing, a stator assembly, and a rotor assembly, wherein the rotor assembly includes an axle and a magnet that are coaxially arranged, and the stator assembly includes a frame and a single electromagnetic coil wound on the frame; wherein a first through hole configured to allow the magnet to rotatably run through is molded on the frame, the electromagnetic coil is disposed on a side of the first through hole, the electromagnetic coil is excitable to generate a drive magnetic field to magnetize the frame to supply a torque to the magnet, a recess configured to receive the stator assembly is molded in the housing. With such configurations, structure design is optimized, assembling is simpler, and efficiency is higher.

Disclosed are a stator and a fan. The stator comprises: an annular stator outer ring. A plurality of stator teeth which are uniformly distributed are connected in the circumferential direction of the inner side of the stator outer ring; the stator teeth are provided along the radial direction of the stator outer ring; a winding group coil is wound outside each stator tooth; the depths of first lead grooves of the insulating wire frames corresponding to the winding group coils in the same phase are the same, and depths of first lead grooves of the insulating wire frames corresponding to the winding group coils of different phases are different from each other, so that in the circumferential direction of the stator outer ring, the wires of different phases are staggered in height, and thus the wires of the phases of the stator are arranged in order.

Disclosed are a stator and a fan. The stator comprises: an annular stator outer ring. A plurality of stator teeth which are uniformly distributed are connected in the circumferential direction of the inner side of the stator outer ring; the stator teeth are provided along the radial direction of the stator outer ring; a winding group coil is wound outside each stator tooth; the depths of first lead grooves of the insulating wire frames corresponding to the winding group coils in the same phase are the same, and depths of first lead grooves of the insulating wire frames corresponding to the winding group coils of different phases are different from each other, so that in the circumferential direction of the stator outer ring, the wires of different phases are staggered in height, and thus the wires of the phases of the stator are arranged in order.

The present disclosure provides a galvanometer motor, including a stator, a rotor, and a sensor board. The stator includes a housing and a drive coil mounted inside the housing. The rotor includes a rotating shaft and a galvanometer lens. A pair of radially magnetized magnetic poles are at the middle of the rotating shaft, two ends of the rotating shaft are rotatably mounted inside the housing, and one end of the rotating shaft extends outside the housing and is connected to the galvanometer lens. The sensor board is fixed on an inner wall of the housing and is at one end of the housing farther away from the galvanometer lens. The sensor board is mounted with one or more magnetic sensors configured to sense a magnetic field signal generated by the pair of magnetic poles, to obtain absolute positions of the rotating shaft and the galvanometer lens.

The present disclosure provides a galvanometer motor, including a stator, a rotor, and a sensor board. The stator includes a housing and a drive coil mounted inside the housing. The rotor includes a rotating shaft and a galvanometer lens. A pair of radially magnetized magnetic poles are at the middle of the rotating shaft, two ends of the rotating shaft are rotatably mounted inside the housing, and one end of the rotating shaft extends outside the housing and is connected to the galvanometer lens. The sensor board is fixed on an inner wall of the housing and is at one end of the housing farther away from the galvanometer lens. The sensor board is mounted with one or more magnetic sensors configured to sense a magnetic field signal generated by the pair of magnetic poles, to obtain absolute positions of the rotating shaft and the galvanometer lens.

A vacuum pump (100) includes a rotor (22b), a rotor blade (13), and a magnetic-bearing-integrated stator (22a) including a coil. The rotor includes a pair of spacer members (29), a support member (27), a permanent magnet (26), and a protective ring (28), and in an axial direction of a rotary shaft (11), the support member has a mechanical strength higher than that of the protective ring.

A vacuum pump (100) includes a rotor (22b), a rotor blade (13), and a magnetic-bearing-integrated stator (22a) including a coil. The rotor includes a pair of spacer members (29), a support member (27), a permanent magnet (26), and a protective ring (28), and in an axial direction of a rotary shaft (11), the support member has a mechanical strength higher than that of the protective ring.

Various embodiments of a system and associated method for an electrically efficient motor including two parallel shafts, one or more rotors including a plurality of alternating permanent magnets mounted on each shaft, and an electromagnet operable for switching polarities in order to keep the one or more rotors, and consequently the two parallel shafts, in rotational motion.