281results about "Synchronous machines" patented technology

The present invention provides a rotor punching, a rotor core, a rotor, a motor, and a vehicle. The rotor punching is provided with a plurality of mounting slots for mounting permanent magnets. A pole arc region is defined between the portion of any mounting slot adapted for the permanent magnet and the outer periphery of the rotor punching. A magnetic isolation bridge is provided on both sides of any pole arc region along the circumferential direction of the rotor punching. A plurality of through holes are provided in any pole arc region, and the plurality of through holes are distributed at both ends of the pole arc region adjacent to the magnetic isolation bridge. The rotor punching provided by the present invention optimizes the rotor magnetic field distribution by providing through holes at the ends of the magnetic isolation bridges on both sides of the pole arc region, effectively weakening the quadrature-axis armature reaction, significantly improving the motor torque pulsation, and also enhancing the electromagnetic torque of the motor to a certain extent, thereby improving the motor's operating performance.

An electric work machine includes a stator including a stator core, an insulator fixed to the stator core, and a coil mounted on the insulator, a rotor at least a part of which is disposed on an outer circumferential side of the stator, the rotor including a magnet, a stator base including a first heat dissipation fin and supporting the stator core, and an output unit driven by the rotor.

A vehicle drive system includes a motor that has a cylindrical stator and a cylindrical rotor provided in the stator to be coaxially rotatable with a center axis of the stator and drives a front wheel of a vehicle by rotation of the rotor. The rotor has a cage section and a permanent magnet section provided on an inner circumferential side of the cage section and formed of a rare earth magnet. The vehicle drive system further includes a controller that executes a synchronous operation mode when a temperature of the permanent magnet section is lower than a predetermined temperature, and executes an asynchronous operation mode when the temperature of the permanent magnet section is equal to or higher than the predetermined temperature. In the synchronous operation mode, the rotor is rotated by using a magnetic force of the permanent magnet section.

The utility model discloses a motor and a vehicle, the motor comprises a first shell, an inner rotor, an inner stator, an outer stator, an outer rotor, a rotor shaft and a stator support frame, the rotor shaft, the inner rotor, the inner stator, the outer stator and the outer rotor are coaxial and are sequentially arranged outwards along the radial direction of the rotor shaft, the inner rotor is coaxially connected with the rotor shaft, the first shell comprises an end plate, and the stator support frame is arranged on the end plate. The stator supporting frame is located on the sides, away from the end plate, of the inner stator and the outer stator, the inner stator and the outer stator are connected between the end plate and the stator supporting frame through fasteners, and the rotor shaft is rotationally installed on the end plate and the stator supporting frame. The motor provided by the utility model has the advantage of high reliability of supporting the inner stator and the outer stator.

To provide a rotary reciprocating drive actuator having high manufacturability, good assembly accuracy, and the ability to drive with high amplitude even if a movable object is a large mirror.SOLUTION: A rotary reciprocating drive actuator has: a shaft portion that supports a movable object; a movable body that has a movable magnet in which a first half and a second half of a ring shape that are fixed to the shaft portion on one side of the movable object in an axial direction, have a ring shape, and are divided by a magnetic pole switching portion that extends in a direction perpendicular to the axial direction, are magnetized to different poles; a fixed coil that is arranged on one side and rotates the movable object back and forth about the shaft portion by electromagnetic interaction with the movable magnet; and a base that supports the shaft portion via bearings on both sides of the movable object in the axial direction. The base is a U-shaped member formed with a pair of bearing arrangement surface portions, each of which has a bearing and is arranged on both sides opposite to each other and a joint surface portion that joins each of the pair of bearing arrangement surfaces. The joint surface portion is parallel to the shaft portion inserted into the bearings.SELECTED DRAWING: Figure 3

A motor includes a stator having a plurality of stator coils repeatedly disposed in a circumferential direction and a rotor configured to rotate around a rotating shaft, including a magnetic material generating rotational force by interacting with the plurality of stator coils. The magnetic material forms a band shape and is configured to be continuously disposed in the circumferential direction. The magnetic material is repeatedly arranged in the axial direction, forming a plurality of layers in the axial direction.

An) electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.

A hedge trimmer includes a body including a housing; a power device including a motor disposed in the housing and configured to drive the hedge trimmer to work; and a battery pack for providing energy for the motor. The motor includes a stator and a rotor, an outer diameter of the motor is greater than or equal to 45 mm and less than or equal to 70 mm, the stator includes a core formed by multiple laminations stacked, the core has a stack length in a direction in which the laminations are stacked, the stack length of the stator is greater than or equal to 20 mm and less than or equal to 35 mm, and the ratio of the outer diameter of the motor to the stack length is greater than or equal to 1.7 and less than or equal to 3.

An electric motor includes a stator and a rotor. The stator carries a plurality of phase windings. The rotor carries a plurality of magnet poles and is connected to a shaft. The stator includes an outer annular yoke and a plurality of discrete teeth that are separate from the annular yoke. Each tooth has a stem and a tooth tip that is located at the end of the stem closest to the roto. An inner annular sleeve is located in what is otherwise an airgap between the inwardly facing tips of the stator teeth and the rotor. The inner sleeve includes location features that positively locate and support the teeth by the tips.

An electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.

The present invention discloses an axial flux shaftless rim propeller, comprising a casing, a rotor and two annular stators, wherein the rotor is located inside the casing, the rotor and the casing are connected by a water-lubricated radial bearing, the two annular stators are arranged on both sides of the rotor, and water-lubricated thrust bearings are respectively arranged between the annular stators and the rotor. The shaftless rim propeller reduces the axial size and balances the axial magnetic pull. Compared with the radial flux shaftless rim propeller, it can provide a greater torque output under the same volume, and improves the output power of the motor. In addition, the shaftless motor structure reduces the axial size of the ship propeller, provides ample space for the arrangement of the thrust bearing, significantly reduces friction and wear, reduces noise, effectively improves the performance of the motor, prolongs the life of the motor, and further improves the operating stability and efficiency of the motor.

Provided is a hub-type electric driving device including: a housing having a wheel formed in the shape of a cup, and a cover whose outer peripheral part is coupled to the opening of the wheel; a motor shaft having both end portions fixed on a body outside of the housing; first and second bearings provided respectively in through-holes formed in the centers of the wheel and the cover; and a BLDC motor embedded inside the housing and rotating the housing around the motor shaft. The BLDC motor includes: a rotor in which a back yoke and a magnet are stacked on a cylindrical inner wall of the wheel; and a stator whose outer peripheral part faces the magnet of the rotor while having an air gap therewith and whose central part is coupled to the outer circumference of the motor shaft.

The present invention provides an apparatus for homogenizing one or more regions within a plurality of electrochemical cells, the apparatus comprising a plurality of magnetic flux generators, each configured to generate a respective varying magnetic field through at least one of the plurality of electrochemical cells, the plurality of magnetic flux generators and the plurality of electrochemical cells are arranged in an alternating manner.

The invention relates to the field of electrical engineering. A multi-pole, multi-phase generator-motor comprises a fixed magnetic core (stator), a movable magnetic core (rotor), a magnet and a winding. The fixed magnetic core contains a base element which consists of a magnet with a magnetizing winding and with generating windings arranged on two sides of the magnet such as to provide for opposite magnetic flux reversals in the combined power winding when the movable magnetic core is moving. The magnetizing winding is fed by the power windings via a rectifier. The number of base elements is a multiple of 6 or 12. The base elements are offset from one another by an angle β = Т+ΔТ and are arranged uniformly at the vertices of regular polygons, where T is a period determined by the angular size of a tooth and a space of the rotor, and ΔТ is the same dimension divided by the number of phases required by the consumer. All of the power windings of the base elements are connected in series. The technical result is that of providing a multi-phase alternating voltage to the end consumer.

A switched reluctance machine is described herein. The switched reluctance machine includes a rotor and a stator disposed concentrically with the rotor, the stator having stator teeth and windings wound about the teeth. The windings include, for each phase of the switched reluctance machine, a first set of coils and a second set of coils. The first set of coils includes first coils characterized by a first number of turns and the second set of coils includes second coils characterized by a second number of turns. The first number of turns is higher than the second number of turns. A motorized micro-mobility system that includes the switched reluctance machine is also described herein.

A rotor having a plurality of laminations joined together and mountable on a shaft for rotation relative to a stator of a rotary electric machine arrangement has a solid section that surrounds an opening within which the shaft is receivable. The solid section includes an outside diameter, magnet receiving voids, and steps delimiting a plurality of pole spans from flux directing features at sides of each of the pole spans. Adjacent flux directing features between adjacent pole spans are disposed on opposite sides of scalloped areas or other such recesses, permitting cooling air flow past the rotor. The invention also concerns a lamination usable together with additional laminations to provide such a rotor, as well as an arrangement, such as an AC motor, generator, or motor / generator, including a stator and such a rotor.

The utility model provides a rotor for a switched reluctance motor, and the rotor comprises a supporting member which is provided with a supporting outer surface which is arranged around the central axis of the supporting member, a plurality of grooves which are uniformly distributed in the circumferential direction are formed in the supporting outer surface, the rotor also comprises a plurality of magnetic conductive members, and the magnetic conductive members are arranged in the grooves. The plurality of magnetic conductive components are arranged in the groove, and two adjacent magnetic conductive components in the plurality of magnetic conductive components are separated by a part of the supporting outer surface; each of the plurality of magnetic conductive members is configured such that the magnetic conductivity in the radial direction of the support member is better than the magnetic conductivity in the chordwise direction of the support member, the chordwise direction being perpendicular to the radial direction. The utility model also provides a switched reluctance motor comprising the rotor. According to the invention, the torque generation capability of the switched reluctance motor can be improved.

A detection sensor including an alternating current (AC) permanent magnet synchronous motor (PMSM) housed in a casing, a motherboard and an AC servo controller with a permanent memory in electronic communication with the PMSM, and a shaft extending from the PMSM configured to rotate a sensing needle wherein the sensing needle is configured to sense an object in its rotation.

A rotary electric machine (100, 660) arranged as a brushless electric ring motor is described and includes a rotor (50, 650) that is disposed within a stator (20, 620) and arranged to rotate on a guide element (13, 613). The rotor (50, 650) has a plurality of ferritic elements (60, 664) arranged on an outer surface (54, 663), and the stator (20, 620) is an annular device having a plurality of electro-magnetic elements (25, 668) arranged on an inner portion (32) between first (21, 667) and second flanges (22, 669). The first and second flanges both include an annular ring (652) that is fabricated from a non-magnetic material and has a plurality of ferromagnetic elements (28). The ferromagnetic elements (28) are magnetically coupled to corresponding ones of the electro-magnetic elements (25, 668) to exert magnetic force on the ferritic elements (60, 664) of the rotor when the electro-magnetic elements (25, 668) are activated. The rotary electric machine may operate as a first thrust generating system that is upstream of a second thrust generating system for a turbojet engine.

According to one aspect, a motor 1 for a personal care device 10 is provided. The motor 1 includes a stator 2 having a stator face, a rotor 3 having a rotor face disposed opposite the stator face, and a spacer 4 protruding between the stator face and the rotor face to define a minimum air gap between the stator 2 and the rotor 3. The spacer 4 is disposed on one of the rotor face and the stator face and has a contact surface configured to engage the other of the rotor face and the stator face.

The present application relates to an electric motor comprising a stator with a plurality of phase windings and a rotor with a plurality of magnetic poles and connected to a shaft; and wherein the stator comprises an outer annular yoke, a plurality of discrete teeth separate from the annular yoke, each tooth comprising a rod and a tooth tip located at an end of the rod closest to the rotor, and an inner annular sleeve located in an air gap between an inwardly facing end of the stator tooth and the rotor, and wherein the inner sleeve comprises a positioning feature located in the outer annular yoke and the inner annular sleeve. The positioning feature positions and supports the tooth in a form-fitting manner via the tooth tip.

The application discloses a surface-mounted permanent magnet motor magnetic pole optimization design method, and steps are finite element preliminary scanning calculation of permanent magnet magnetic pole design variables, determination of design variable refinement range based on target variables, finite element refinement scanning calculation of permanent magnet magnetic pole design variables and determination of final optimization scheme based on target variables; the design method scans and calculates the design variables twice and screens the scheme manually, thus improving design capability and calculation efficiency.

The invention relates to the technical field of motor control, and discloses a rotor vibration suppression method based on outer air gap radial force of a stator partition magnetic regulation motor, which comprises the following steps of: 1, obtaining an inner and outer layer air gap accurate magnetic conductance model according to a conformal transformation method; 2, constructing two new rotor structures for inhibiting the radial force of the outer air gap of the motor; step 3, analyzing the reason for suppressing the low-order radial force amplitude of the outer air gap of the stator partitioned magnetic field modulation motor by the new rotor structure; and 4, establishing a multi-physical field structure model, and simulating the vibration performance of the stator partitioned magnetic field modulation motor with different rotor structures. According to the method, a magnetic conductance-magnetomotive force model is established to analyze the flux density-radial force harmonic waves of the stator partitioned magnetic field modulation motor, it is clear that dominant radial force harmonic waves for generating main electromagnetic vibration are distributed according to outer air gap radial force distribution characteristics of the stator partitioned magnetic field modulation motor, and a rotor of a surface and internal auxiliary groove structure is provided; and the radial force amplitude existing in the outer air gap is effectively inhibited.

The utility model relates to a synchronous reluctance motor, which comprises a stator core and a rotor core, the stator core is sleeved on the periphery of the rotor core, a gap is reserved between the stator core and the rotor core, a plurality of stator tooth grooves are uniformly arranged on the surface of the stator core along the circumferential direction, windings are arranged in the stator tooth grooves, and ferrite is embedded in magnetic barrier grooves. A plurality of second through grooves are evenly distributed along the circumference of the rotor core, one side of each second through groove is communicated with the corresponding magnetic barrier groove, the other side of each second through groove penetrates to the outer side of the rotor core, a plurality of first through grooves penetrating through the inner side and the outer side of the stator core are formed in the stator core, and connecting grooves are communicated between the stator tooth grooves and the first through grooves. The outer side of the rotor core is uniformly connected with a plurality of fan blades along the circumferential direction of the rotor core. According to the utility model, heat generated during operation of the rotor and the stator can be effectively dissipated, and the aging process of each part of the motor is prevented from being accelerated due to a high-temperature environment generated during continuous operation, so that the service life of the whole system is prolonged.

The invention relates to a method for determining the temperature (ϑstator) of the stator winding of a vectorially controlled electric motor by superimposing a periodic excitation signal (f(t)) with an excitation frequency (fA) on a manipulated variable (id). Meanwhile, from motor signals (x(t)), comprising at least a first and second voltage component (ud, uq), a first and second current component (id, iq) and an angular frequency (ωel), a set (Tx) of signal characteristics ({x0, x1,sin, x1,cos}) is determined, comprising the DC component (x0), the component of the magnitude of the fundamental amplitude (x1,sin) at the excitation frequency (fA) in phase with the excitation signal (f(t)) and the component of the magnitude of the fundamental amplitude (x1,cos) at the excitation frequency (fA) 90° out of phase with the excitation signal (f(t)) in the respective motor signal (x(t)).From a system of equations, a set of motor parameters (Rs, Ld, Lq, Ψpm) is calculated using the signal characteristics ({x0, x1,sin, x1,cos}), which includes the electrical stator resistance (RS). The stator winding temperature (ϑStator) is then calculated from a temperature model (ϑStator(Rs)) that relates the stator winding temperature (ϑStator) to the stator resistance (Rs), or estimated using a function approximator (6) that uses at least the set of motor parameters (RS, Ld, Lq, Ψpm) and the sets (Tx) of signal characteristics ({x0, x1,sin, x1,cos}).

The application discloses a high-integration flywheel energy storage system based on a strong magnetic stator permanent magnet type axial flux motor, and relates to the field of flywheel energy storage systems.The system comprises a strong magnetic stator permanent magnet type axial flux flywheel motor, a high-integration hybrid magnetic suspension bearing and an integrated flywheel rotor, etc.The strong magnetic stator permanent magnet type axial flux flywheel motor comprises a stator and a rotor, and the stator is internally provided with a spiral cooling water channel.The high-integration hybrid magnetic suspension bearing comprises a radial magnetic suspension bearing and an axial magnetic suspension shaft, and is divided into a rotating part and a stationary part.The stationary part is integrated with the stator of the strong magnetic stator permanent magnet type axial flux flywheel motor, the rotating part is embedded in the flywheel rotor together with the rotor of the strong magnetic stator permanent magnet type axial flux flywheel motor, and the flywheel rotor is composed of the rotating part and the stationary part.

Disclosed is a stator assembly, including: a housing (10), wherein the housing (10) has an accommodating cavity (11), and a bottom surface of the housing (10) is provided with an accommodating groove (12); a stator (20), disposed at a bottom of the housing (10), wherein a middle of the stator (20) is of a hollow structure, and the hollow structure is disposed corresponding to the accommodating groove (12); a circuit board (30), disposed in the accommodating cavity (11), wherein the circuit board (30) is electrically connected with the stator (20) by a contact pin (40); and a sensor (50), disposed in the accommodating cavity (11), wherein the sensor(50) is electrically connected with the stator (20), and the sensor (50) is located on a side of the circuit board that is away from the stator (20). Further disclosed is an electronic expansion valve including the stator assembly. The problem of large processing difficulty of the electronic expansion valve in the prior art can be solved.

System for a wet-running brush module (4) of an electric machine with a rotatable shaft (80) having at least one bearing (84, 85), characterized in that the system has at least one spray nozzle (20) for a medium, wherein the at least one spray nozzle (20) is designed to spray the medium onto the at least one bearing (84, 85) of the shaft (80), wherein at least one receiving module (18) is attached to the brush module (4), via which the at least one spray nozzle (20) is connected to the brush module (4), wherein the at least one spray nozzle (20) is screwed, pressed or clipped into the at least one receiving module (18).

The present invention provides an apparatus for homogenising one or more regions within a plurality of electrochemical cells, the apparatus comprising a plurality of magnetic flux generators, each configured to generate a respective changing magnetic field through at least one of the plurality of electrochemical cells, wherein the plurality of magnetic flux generators and the plurality of electrochemical cells are arranged in an alternating manner.