Disclosed herein are a motor safety control method that can efficiently detect an abnormality of a motor sensor configured to sense a rotational motion of a motor and control a safety operation of the motor based thereon, and a robot for implementing the method. The motor safety control method for a robot may include receiving a first motor value from a high-resolution sensor of a motor, receiving a second motor value from a low-resolution sensor of the motor, and comparing a threshold with a difference between the first motor value and the second motor value, and transmitting an operation signal to a motor driver for the motor to continue or stop operation of the motor.

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.

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.

An integral motor pump (IMP) or turbine (IMT) applicable to a low temperature process liquid, such as liquid hydrogen, includes an impeller having an annular ring of permanent magnets attached thereto passing in axial proximity to a plurality of stator coils. The magnet ring is radially bounded by inner and outer compression sleeves having coefficients of expansion (CTEs) respectively less than and greater than the CTE of the magnets. Unequal thermal contraction of the compression sleeves, when cooled by the process liquid, applies radial compression to the magnet ring, overcoming centrifugal forces and maintains the magnets in radial compression, thereby preventing fracturing or pulverizing of the magnets. The magnet ring can be a monolithic ring with alternating magnetic regions, a ring of closely abutting magnets, or a ring of discrete magnets surrounded by a barrier material having a CTE equal to the magnet CTE.

A planar vessel mixing system is disclosed. The mixing system may include a mixing vessel, which may be a filter reactor, with a mixing region for receiving mixing substances, which may be liquid or solid. The vessel may include at least one magnetic stir bar to mix the substances. At least one brushless magnetic drive may be disposed externally around the mixing vessel and may be configured to generate a rotating magnetic field to rotate the magnetic stir bar, thereby mixing the mixing substances. The brushless magnetic drive may be adjustable along a length of the mixing vessel. A filter may be disposed at the bottom of the mixing vessel to filter out byproducts from the mixing. Use of the brushless magnetic drive may enable small-scale mixing (e.g., less than 100 mL) by removing the need for an overhead stirrer.

A planar vessel mixing system is disclosed. The mixing system may include a mixing vessel, which may be a filter reactor, with a mixing region for receiving mixing substances, which may be liquid or solid. The vessel may include at least one magnetic stir bar to mix the substances. At least one brushless magnetic drive may be disposed externally around the mixing vessel and may be configured to generate a rotating magnetic field to rotate the magnetic stir bar, thereby mixing the mixing substances. The brushless magnetic drive may be adjustable along a length of the mixing vessel. A filter may be disposed at the bottom of the mixing vessel to filter out byproducts from the mixing. Use of the brushless magnetic drive may enable small-scale mixing (e.g., less than 100 mL) by removing the need for an overhead stirrer.

An electric motor includes a stator and a rotor rotatable relative to the stator. The stator includes: a stator core including a yoke portion having a cylindrical shape and twelve teeth each protruding radially inward from the yoke portion; and coils of three phases, a winding being concentratedly wound around each of the teeth to form each of the coils. The number of poles of the rotor is two. The teeth include two teeth located adjacent to each other in a circumferential direction and forming a teeth portion, and windings of a same phase are respectively wound in a same direction around the two teeth forming the teeth portion and are connected in series. The teeth are arranged such that the teeth portions adjacent to each other are different in phase and the three phases are arranged sequentially side by side in the circumferential direction.

An electric motor includes a stator and a rotor rotatable relative to the stator. The stator includes: a stator core including a yoke portion having a cylindrical shape and twelve teeth each protruding radially inward from the yoke portion; and coils of three phases, a winding being concentratedly wound around each of the teeth to form each of the coils. The number of poles of the rotor is two. The teeth include two teeth located adjacent to each other in a circumferential direction and forming a teeth portion, and windings of a same phase are respectively wound in a same direction around the two teeth forming the teeth portion and are connected in series. The teeth are arranged such that the teeth portions adjacent to each other are different in phase and the three phases are arranged sequentially side by side in the circumferential direction.