389results about "Synchronous machines" patented technology

The invention relates to an electric machine (1) with a displacement body (6), wherein the electric machine (1) is designed in the form of a separately excited, directly cooled synchronous machine, comprising a housing in which a rotor (2), comprising winding carriers (3) arranged star-shaped to one another, each having a winding (4), is rotatably mounted, and which is encompassed by a stator, and wherein a winding gap (5) is formed between adjacent windings (4), in which the displacement body (6) with a cooling channel (7) is mounted. According to the invention, the displacer body (6) is designed in multiple parts, consisting of at least two individual parts (12, 21), wherein the individual parts (12, 21) comprise a first module (14) in the form of an intermediate element (11) of the displacer body (6), and / or a second module (15) in the form of a first end region (9) of the displacer body (6) and / or a third module (22) in the form of a second end region (13) of the displacer body (6).

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.

The invention discloses an axial magnetic flux shaftless rim propeller which comprises a machine shell, a rotor and two annular stators, the rotor is located in the machine shell, the rotor and the machine shell are connected through a water lubrication radial bearing, the two annular stators are arranged on the two sides of the rotor respectively, and water lubrication thrust bearings are arranged between the annular stators and the rotor respectively. According to the shaftless rim propeller, the axial size is reduced, the axial magnetic pulling force is balanced, compared with a radial magnetic flux shaftless rim propeller, larger torque output can be provided under the same size, and the output power of a motor is improved. In addition, the shaftless motor structure reduces the axial size of the ship propeller, provides sufficient space for arrangement of thrust bearings, remarkably reduces friction and abrasion, reduces noise, effectively improves the performance of the motor, prolongs the service life of the motor, and further improves the operation stability and efficiency of the motor.

The invention discloses a stator permanent magnet type rotor skewed slot magnetic flux switching motor which comprises a motor stator which comprises a stator iron core, a plurality of main teeth and a plurality of auxiliary teeth are arranged on the inner side of the stator iron core in the circumferential direction at intervals in a staggered mode, and the number of the main teeth is the same as that of the auxiliary teeth; each main tooth and the adjacent auxiliary tooth form a wire embedding groove, a coil winding is arranged in each wire embedding groove, each main tooth is provided with a first set of permanent magnets, the end part of each auxiliary tooth is provided with a pole shoe, and the pole shoe is provided with a second set of permanent magnets; the motor rotor and the motor stator are coaxially arranged, a plurality of rotor teeth are arranged on the outer side of the motor rotor in the circumferential direction at intervals, and the number of the rotor teeth is an even number. According to the invention, the torque of the motor is improved, and the motor is suitable for application occasions with higher torque requirements under the same volume.

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.

An electrified powertrain of a vehicle includes a battery pack linked to a traction power inverter module (TPIM) that converts a DC voltage from the battery pack to an AC voltage. A rotating electrical machine includes a stator excited by an AC voltage of a TPIM, surrounding a rotatable rotor core. The rotor core includes slots that accommodate conductive strips and permanent magnets, the conductive strips being positioned closer to the center of the rotor core. The conductive strip and the permanent magnet are separated by a gap within each slot. An annular end ring assembly is present at one end of the rotor core, characterized in that the terminal conductors are connected to a subset of the conductive strips and the secondary coil of the resolver. When the stator is energized, a rotor shaft connected to the rotor rotates. An electric machine powers a transmission coupled to the rotor shaft.

A method of treating an iron-cobalt component is disclosed. The method comprises: heat treating the component using a temperature of at least 700° C.; applying a static magnetic field of at least 3000 A / m to the component during the heat treatment. Also disclosed is a furnace for treating the iron-cobalt component, and a method of forming a stator for a transverse flux electric machine.

The invention relates to a rotor (10) for a separately excited synchronous machine, comprising a base body (12) with several pole shoes (16) distributed evenly around the circumference, each having an excitation winding (18), wherein the base body (12) is made of a ferromagnetic material, wherein the rotor (10) has a number of cover bodies (20-1 to 20-6) corresponding to the number of pole shoes (16) radially outside and the cover bodies (20-1 to 20-6) are arranged in the circumferential direction (u) across the pole shoes, wherein the cover bodies (20-1 to 20-6) associated with a pole shoe (16) are each spaced apart from each other such that a pole shoe surface section (16-4) without a cover body remains for each pole shoe (16). The invention is characterized in that the cover bodies (20-1 to 20-6) are made of an anisotropic ferromagnetic material and are arranged alternately in the circumferential direction (u),are arranged having a first magnetic preferred direction and a second magnetic preferred direction, and that each pole shoe (16) is assigned two cover bodies (20-1 to 20-6) having different magnetic preferred directions, wherein each pole shoe (16) has a pole leg (16-1) carrying the excitation winding (18) and a pole head (16-2) radially outwardly delimiting the excitation winding (18), wherein the pole head (16-2) has a central extension (16-3) extending radially outward from the pole head (16-2), over which the cover bodies (20-1 to 20-6) assigned to a pole shoe (16) are arranged spaced apart from each other, and whose radial outer surface forms the cover-body-less pole shoe surface section (16-4), wherein each pole shoe (16) has two magnetic flux barriers (30, 32),which are arranged to the left and right of the central extension (16-3) when viewed in the circumferential direction (u) and which are arranged in the radial direction (r) between the pole head (16-2) and the associated cover bodies (20-1 to 20-6).

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.

The invention discloses a multi-objective optimization method for a permanent magnet synchronous motor of an electric vehicle, which relates to the technical field of permanent magnet synchronous motor structure optimization and comprises the following steps of: establishing a finite element model of the permanent magnet synchronous motor of the electric vehicle, and determining design variables, optimization parameters and optimization objectives; generating a comprehensive sensitivity coefficient according to the sensitivity of each design variable to the optimization target; calculating a value range of each design variable according to the generated comprehensive sensitivity coefficient, thereby determining a state space vector, designing a reward function according to the state space vector, and obtaining a reward value in a current state; selecting an action to be performed according to the current state space vector, generating a new state space vector after the action is adopted according to the performed action, and calculating an action value function of the new state space vector after the action is adopted through a Q-learning algorithm; and circularly carrying out action selection, updating the action value function, and when the updated action value function meets a convergence condition, stopping circulation to obtain an optimized design variable.

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.

An electrical machine (1) operating by switching of magnetic flux comprises a rotor (10), a stator (20) and a winding (30). The stator has at least two stator discs (22) magnetically connected in series via rotor discs (12). The electric machine topology implements the magnetic gearing effect, and has simple winding loops (32) enclosing magnetic structures (70). The magnetic structures are securely fixed to the winding.

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.

The present invention concerns an electrical generator (1 ) comprising: a first body (11 ) capable of generating a magnetic field which extends along a main direction parallel to a first axis (Y), having a first and a second magnetic pole; a second body (12) capable of generating a magnetic field, which extends along a main direction parallel to said first axis (Y), arranged parallel with respect to said body (11 ) and having a third and a fourth magnet pole, such that said third magnetic pole is arranged in correspondence with said first magnetic pole of said body (11 ) and said fourth pole is arranged in correspondence with to said second pole; at least a first ferromagnetic element (21 ), which, in a rest configuration, extends substantially perpendicular to said first axis (Y) and is arranged between said first (11 ) and second (12) body; an axis of rotation (5), perpendicular to said first axis (Y), around which axis of rotation (5), in an operational configuration, said at least one first ferromagnetic element (21 ) is able to rotate; at least a first segment of support (31 ), which is arranged between said first pole of said first body (11 ) and third pole of said second body (12) or between said second and fourth pole; at least one electrical conductor (3) arranged wrapped around said at least a first segment of support (31 ); a frame (20) configured to anchor said at least a first ferromagnetic element (21 ) and to connect to a plurality of ferromagnetic elements (41, 42, 43, 44) arranged between said at least a first segment of support (31 ) and the respective magnetic poles of said first (11 ) and second (12) body, wherein said frame (20) rotates around said axis of rotation (5), integral to the rotation of said at least a first ferromagnetic element (21 ) and said plurality of ferromagnetic elements. The present invention also concerns an operating method of the generator (1 ).

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.

The present invention relates to a short-circuit current control system (0) for an electrical network (3), comprising a power converter (2) controlled by a control system (4) and configured to rectify and regulate the voltage of the electrical machine (1). The control system (4) comprises: a synchronization unit (41); a control unit (42): - in active short-circuit mode, - in "freewheeling" mode, - by asynchronous pulse-width modulation; a regulation unit (43); such that, in the event of a short circuit, the control system (4) commands the power converter (2) to deliver to the electrical network (3) a direct current equal to the predetermined value. Figure for the abstract: Fig. 1

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.