337results about "Asynchronous induction motors" patented technology

The utility model discloses an induction motor, compressor and refrigeration equipment, relates to the motor technical field, the induction motor comprises a stator part, a stator iron core comprises a plurality of stator punching sheets laminated along the axial direction of the stator iron core, each stator punching sheet comprises a stator yoke and a plurality of stator teeth arranged on the inner side of the stator yoke and arranged along the circumferential direction of the stator yoke at intervals, a stator slot is formed between every two adjacent stator teeth; wherein any two intersection points exist between a line segment of the stator punching sheet passing through the circle center and the outer contour of the stator punching sheet, the maximum value of the line segment between any two intersection points is L1, the minimum value of the line segment between any two intersection points is L2, and L1 / L2 is greater than or equal to 1.02 and less than or equal to 1.2, the tooth width of the stator teeth is W1, the maximum slot width of the stator slots is W2, W2 / W1 is greater than or equal to 2.6 and less than or equal to 3.6, the minimum stator yoke width of the stator punching sheet is Y1, the inner diameter of the stator punching sheet is L3, and Y1 / ((L1-L3) / 2) is greater than or equal to 0.3 and less than or equal to 0.45. According to the induction motor, the efficiency of the induction motor can be improved, and the calorific value is reduced.

The invention relates to a single-phase asynchronous capacitor motor, which comprises a stator part, a rotor part and a motor rotating shaft, the capacitor motor further comprises a casing, the casing comprises a front casing wall, a rear casing wall and a ventilation rear cover, the front end part of the motor rotating shaft is coupled in the front casing wall through a front bearing, and the rear end part of the motor rotating shaft is coupled in the rear casing wall through a rear bearing. The rear end part of the motor rotating shaft is coupled in the rear shell wall through a rear bearing, the rear bearing comprises an outer bearing sleeve, an inner bearing sleeve and a bearing roller, the inner bearing sleeve is fixedly sleeved on the rear end part of the motor rotating shaft, the inner bearing sleeve comprises an inner bearing ring pipe and a connecting disc body, and the inner bearing ring pipe is sleeved on the inner bearing ring pipe. The connecting disc body is fixedly connected to the outer end of the inner bearing ring pipe, the coaxial cooling fan is connected to the connecting disc body, when the inner bearing sleeve rotates, the connecting disc body and the motor rotating shaft coaxially and synchronously rotate, and the connecting disc body drives the coaxial cooling fan and the motor rotating shaft to coaxially and synchronously rotate.

An electric motor comprises: a stator; a rotor shaft having a hollow interior and a rotor axis with at least one inlet into the hollow interior and at least one outlet from the hollow interior to an outer diameter of the rotor shaft; a rotor comprising: a rotor body having a first end structure and a second end structure opposite each other along the rotor shaft, wherein the second end structure has an outlet to an outside of the rotor; and an axial cooling channel extending through the rotor body; and wherein the electric motor is configured so that a fluid is centrifugally driven by rotation of the rotor to enter through the inlet of the rotor shaft, exit through the outlet of the rotor shaft, enter the axial cooling channel, and flow to the outside of the rotor through the outlet of the second end structure.

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.

A system includes an induction motor configured to drive an electric submersible pump (ESP). The induction motor includes a one or more rotors disposed about a rotational axis, and a plurality of bearings disposed about the rotational axis. Each bearing of the plurality of bearings is disposed axially between a pair of rotors of the one or more rotors. The induction motor further includes one or more stators disposed about the one or more rotors.

A rotor for an electric machine of a motor vehicle is provided, which can be used as a rotor of the electric machine, which is rotatably mounted with respect to a stator of the electric machine, wherein the rotor has a plurality of recesses distributed along a circumferential direction and extending along a longitudinal direction, wherein the geometric shapes of the cross sections of the recesses differ from one another along the circumferential direction, wherein, with respect to the assembled state of the electric machine, the recesses are each closed with respect to a radial direction towards a side of the rotor which faces the stator.

The invention relates to the technical field of electromagnetic coils, and discloses a laminated tooth-shaped coil winding based on interlayer phases and a design method of the laminated tooth-shaped coil winding. According to the tooth-shaped coil, the number of effective edges of the winding is remarkably increased through a multi-branch parallel connection mode, and the end portions are reduced; meanwhile, gaps of the concave tooth portion and the convex tooth portion of the tooth-shaped coil provide enough space for winding assemblies such as an iron core, a heat dissipation pipe, an insulating material, a structural material and a sensor, forming of an integrated winding with magnetism gathering, heat dissipation, insulation, structural strength and sensing control is facilitated, and application and popularization of the type of winding are greatly facilitated through the design method.

The utility model relates to the technical field of new energy high-altitude operation parts, and discloses a series excitation three-phase asynchronous drive motor stator assembly, which comprises a flat wire coil formed by winding a bare flat wire, interlayer insulation paper is arranged between layers of the bare flat wire, the bare flat wire comprises a flat wire end, and the flat wire end is provided with an insulation layer. And wrapping cloth is arranged on the surfaces of the four groups of flat wire coils. According to the series excitation three-phase asynchronous drive motor stator assembly, through the flat wire coil formed by the bare flat wire in the winding mode shown in the attached drawing, when a winding machine carries out winding processing on the stator assembly, winding equipment can complete winding at a time, secondary processing is not needed, time and labor are saved, the production efficiency is improved, and the production cost is reduced. Meanwhile, wrapping equipment can conduct wrapping processing on the flat wire coil conveniently, stranded wires are welded conveniently, and finally, the first soft red copper stranded wires and the second soft red copper stranded wires are connected with the designated flat wire ends respectively in a flexible connection welding mode, so that assembly in the subsequent procedure is facilitated, and the production efficiency is improved.

The present invention relates to a method for manufacturing an armature and / or rotor for an electric machine, in particular a short-circuit or cage-type rotor, comprising the method steps of inserting a slotted bar, in particular manufactured by an additive manufacturing process, machining, extrusion or die-casting, into an axially extending slot of a laminate stack so that the slotted bar has, on at least one of its end faces, a protrusion above or flush with the laminate stack, in particular at the height of at least one insertion, and of layerwise applying, in particular printing, at least one ring, preferably a short-circuit ring, to at least one of the end faces of the slotted bar, in particular by an additive printing process.

Rotating electric machine (1) with a central longitudinal axis (1C), comprising: a stator (100) comprising armature coils (104) wound around the stator (100) with concentrated winding, the armature coils (104) being configured to generate magnetic flux when excited; and a rotor (300) which is rotatable about the central longitudinal axis (1C) in response to the flow of the magnetic flux, wherein the rotor (300) comprises a plurality of salient poles (302) which are wound by rotor windings (330) which are capable of inducing at least one induced current when the magnetic flux couples with the rotor (300), wherein the rotor (300) comprises at least one rectifier circuit (C1 to C6), wherein the rotor windings (330) are wound such that the salient poles (302) can operate as electromagnets whose magnetization directions are alternately reversed along an arc length of a circle around the central longitudinal axis (1C), wherein each rectifier circuit forms a closed circuit consisting of a group of rotor windings (330), wherein in each group some of the rotor windings (330), whose current phases of the induced current are the same, are connected in series with a rectifier element (D1 to D8), wherein the rotor windings (330) are either divided into four groups such that in each group all rotor windings (330) are connected in series with a rectifier element to form a rectifier circuit or the rotor windings (330) are divided into two groups such that each group comprises several series circuits, of which a first and a second series circuit are connected in parallel and each of these first and second series circuits is connected in series with a rectifying element.

Electric motor comprising a squirrel-cage rotor in the form of a cage, which electrically conductively carries a plurality of rotor end rings formed as cast parts made of a casting material, wherein at least one reinforcing element made of a different material is cast into each of the cast parts, and wherein the casting material substantially forms the outermost free surface of the rotor end ring.

The invention provides a straight-bar stator punching sheet and a forming method thereof, a stator core, a stator structure and a motor. The straight-bar stator punching sheet comprises punching sheet split bodies (1), each punching sheet split body (1) comprises yoke parts (2), stator tooth parts (3) and shoe parts (4), the yoke parts (2) of the adjacent punching sheet split bodies (1) are connected into a whole through a connecting bridge (5), the punching sheet split bodies (1) are divided into at least two groups, the lengths of the shoe parts (4) of the at least two groups of punching sheet split bodies (1) are different along the arrangement direction, and the punching sheet split bodies (1) of different groups are alternately arranged along the arrangement direction. According to the straight-strip stator punching sheet, stator and rotor tooth groove harmonic waves can be effectively weakened, the influence of electromagnetic force is reduced, and motor noise is reduced.

The invention discloses a high-inertia multi-port composite motor for new energy grid connection. The high-inertia multi-port composite motor comprises a brushless doubly-fed motor, an axial permanent magnet motor and a magnetic gear structure. The brushless doubly-fed motor comprises a radial stator and a squirrel cage rotor, a power winding and a control winding are arranged in the stator and serve as a first electric port and a second electric port respectively, the axial permanent magnet motor comprises an axial stator and an axial permanent magnet rotor, and an armature winding is arranged in the stator and serves as a third electric port. The magnetic gear structure is arranged on the inner side of the squirrel cage rotor and the outer side of the rotating shaft, a brushless doubly-fed motor rotor magnetic field is used as a modulation magnetic source, the phase and amplitude of the magnetic field are adjustable, dynamic adjustment of the transmission ratio of the magnetic gear is achieved through a control winding, and electromagnetic and mechanical dual coupling is achieved. The equivalent rotational inertia of the composite motor is obviously higher than that of a single machine, stronger inertia support and frequency stability can be provided for a power grid in a new energy grid connection process, and the composite motor is provided with three independent electric ports, realizes multi-mode operation, and is compact in structure and high in power density.

The invention relates to a rotor (10) of an asynchronous machine (100), comprising: a rotor shaft (11) which extends along an axis of rotation (DA); a rotor lamination stack (12) which is directly or indirectly connected to the rotor shaft (11); a plurality of rotor bars (13, 13a, 13b, 13c) which extend in the direction of the rotational axis (DA) and are arranged in a distributed manner in the circumferential direction about the rotational axis (DA); and at least one shorting ring connecting all the rotor bars (13, 13a, 13b, 13c) to one another in an electrically conductive manner. The plurality of rotor bars (13, 13a, 13b, 13c) comprise at least three different rotor bars (13a, 13b, 13c), which are different from each other in width. The invention further relates to an asynchronous machine (100) having a rotor (10) and to a method for determining a rotational position (DP) of a rotor (10).

The utility model relates to the technical field of squirrel-cage synchronous motors, in particular to a rotor punching sheet and a stator punching sheet on a squirrel-cage synchronous motor of a refrigerator compressor, which comprise 24 stator grooves including two special-shaped grooves A and two special-shaped grooves B, two punching sheet yoke parts 1 form a tip structure of the stator punching sheet, and the included angle of the tip end of the rotor groove is set to be 150-165 degrees. According to the technical scheme of the utility model, one side of the stator punching sheet structure adopts the traditional long-edge design, the other side adopts the pointed-end structure, and four of the 24 slots adopt the special-shaped slot design, so that the size rationality of the yoke part of the motor is ensured, the rationality of the magnetic circuit of the motor in design is ensured, the utilization rate of silicon steel of the motor is improved, and the consumption of silicon steel is reduced; the groove-shaped tooth tip parts of the rotor punching sheet are distributed at 150-165 degrees, and on the premise that the tooth width and the groove-shaped length of the rotor are not changed, the cast aluminum volume of the rotor is improved, so that the impedance of the rotor is improved, the magnetic flux density of the rotor is increased, the maximum torque of the motor is improved, and the starting performance of the compressor is improved.

The utility model discloses a direct-drive electro-magnetic annular synchronous motor, and belongs to the technical field of large-scale synchronous motors. The motor comprises a split stator which is formed by splicing and fixing a plurality of stator petals along the circumferential direction; the block magnetic poles form a motor rotor, a plurality of independently-formed magnetic pole units are arranged at intervals in the circumferential direction, and each magnetic pole unit is directly and fixedly installed on the outer wall of the load rotating cylinder; the supporting and sealing structure is arranged at the axial end part between the split stator and the block magnetic pole and is used for sealing a gap between the split stator and the block magnetic pole; and the collector ring and brush carrier system is arranged at one axial end of the motor, and the output end of the collector ring and brush carrier system is electrically connected with the excitation windings of the block magnetic poles. According to the utility model, the split stator and the block magnetic pole structure are adopted, so that the transportation and field installation of the ultra-large motor are facilitated; the rotor is directly mounted on the outer wall of the milling cylinder to realize direct drive, a gear transmission link is omitted, the transmission efficiency is high, and operation is stable; a multi-layer sealing structure adapts to a high-dust environment, and the reliability is high; the speed regulation performance is good and the maintenance is convenient.

The present application provides a rotor assembly and a self-starting permanent magnet synchronous reluctance electric motor. The rotor assembly includes a rotor core 1, and in a cross section of the rotor core 1, the rotor core 1 includes slit grooves 2, a q-axis squirrel-cage groove 41, and permanent magnets 3, the q-axis squirrel-cage grooves 41 are provided at both ends of the slit grooves 2, the permanent magnets 3 are arranged in the slit grooves 2, at least the permanent magnets 3 located in the innermost layer in the d-axis direction are arranged asymmetrically with respect to the d-axis, and the offset direction of the permanent magnets 3 located in the innermost layer with respect to the d-axis is the same as the rotation direction of the rotor assembly.

The utility model relates to the technical field of motors, in particular to a three-phase asynchronous motor for a vehicle-mounted steering pump, which comprises a motor main body and a rotating shaft arranged in the motor main body in a penetrating manner, the motor main body comprises a machine base, a front end cover and a rear end cover are respectively arranged at positions, corresponding to two ends of the rotating shaft, of the machine base, and a rotor is arranged in the circumferential direction of the rotating shaft. The three-phase asynchronous motor is characterized in that the motor base is provided with a rotor, the outer side of the rotor is sleeved with a stator which is circumferentially fixed with the motor base, the rotating shaft is rotatably connected with the front end cover through a bearing, the front end cover is provided with a limiting piece, and the bearing is fixed on the front end cover through the limiting piece. Axial movement of the rotor is eliminated, bearing impact and damage are reduced, and the service life of the motor is prolonged.

This invention belongs to the field of three-phase asynchronous motor technology, specifically a three-phase asynchronous motor with high sealing effect. It includes a motor body, an external double-layer sealed shell for buffering the motor body, and motor bases supporting the motor body on both sides of the lower center of the double-layer sealed shell. Inside the motor body is a heat dissipation mechanism for cooling the motor body. When the motor is running, the motor body generates heat. At this time, the heat dissipation mechanism starts working, and coolant enters the annular water-cooling channel through the inlet, flowing through shallow grooves on the outer surface of the inner shell. Because the shallow grooves are coated with thermally conductive silicone grease, and the annular water-cooling channel uses thin-walled copper tubing, heat can be efficiently transferred from the inner shell to the coolant. After absorbing heat, the coolant's temperature rises and it is discharged from the outlet, forming a circulating cooling system, thereby achieving continuous heat dissipation from the motor body.

The invention discloses a motor and a vehicle, the motor comprises a first shell, an inner rotor, an inner stator, an outer stator and an outer rotor, the inner rotor, the inner stator, the outer stator and the outer rotor are coaxial and are sequentially arranged outwards in the radial direction of the inner rotor, and the inner rotor and the outer rotor are both rotatably installed in the first shell; the outer stator is provided with a plurality of first through holes extending in the axial direction of the outer stator, the inner stator is provided with a plurality of second through holes extending in the axial direction of the inner stator, any first through hole and any second through hole are arranged at intervals in the circumferential direction of the inner rotor, and the outer stator is connected with the first shell through first fasteners penetrating through the first through holes. And the inner stator is connected with the first shell through a second fastener penetrating through the second through hole. The motor provided by the invention has the advantages of compact radial size, small volume and light weight.

The invention relates to a joining tool (10) for connecting at least two elements (36, 38) by driving in a connecting element in the form of a self-piercing rivet (34), comprising a drive (14) which is designed to generate an axial force in order to drive the self-piercing rivet (34) into the elements (36, 38) to be connected; and an actuator (22) which is designed to apply the force generated by the drive (14) to the self-piercing rivet (34); wherein the joining tool (10) comprises a linear induction motor (14) as a drive (14). The invention also relates to a method for connecting at least two elements (36, 38) by driving in a self-piercing rivet (34), wherein the self-piercing rivet (34) is driven into the elements (36, 38) to be connected by applying an axial force to the self-piercing rivet (34), wherein the axial force is generated by a linear induction motor (14).

A microgrid system includes a common bus; a generator electrically connected to the common bus, the generator comprising a prime mover; a generator stator; and a generator rotor coupled to the prime mover. The generator rotor and the prime mover have a combined generator rotational moment of inertia and the prime mover is configured to rotate the generator rotor relative to the generator stator at a system angular velocity to generate electricity The synchronous condenser includes a synchronous condenser rotor with a synchronous condenser rotational moment of inertia The synchronous condenser rotor is configured to rotate at the system angular velocity in response to rotation of the generator rotor. The microgrid system has a combined system rotational moment of inertia including the generator rotational moment of inertia and the synchronous condenser rotational moment of inertia, wherein the system rotational moment of inertia resists deviation of the system angular velocity.

There is provided an induction machine (100) comprising a rotor (120); a stator (140); and a phase-shift oscillator (160). The stator comprises: a first winding (141); and a second winding (142), arranged at a first angle (101) relative to said first winding. The phase-shift oscillator comprises: a transistor (170), the transistor (170) being a high-electron mobility transistor, HEMT; and a phase-shift network (180). The first winding is connected to a first node (181) of the phase-shift network and wherein the second winding is connected to a second node (182) of the phase-shift network, wherein the phase-shift oscillator is configured to provide a first phase electric signal at the first node and a second phase electric signal at the second node, wherein a difference between the first and second phase corresponds to the first angle. There is also provided an electric aircraft propulsion system comprising the induction machine.

The application provides a rotor structure and a single-phase induction motor. The rotor structure comprises a rotor core (2), a plurality of conductor grooves (6) are arranged on the rotor core (2), and rotor slots (21) extending to the outer circle of the rotor are arranged on the outer side of the conductor grooves (6). The rotor slots (21) are divided into a plurality of groups, each group of rotor slots (21) comprises at least two kinds of rotor slots (21) with different radial heights, and the plurality of groups of rotor slots (21) are arranged in sequence and at intervals along the circumference of the rotor core (2), and the rotor toothed shoes (8) are formed between adjacent rotor slots (21). According to the rotor structure, the air gap magnetic field harmonics of the motor can be reduced, the influence of electromagnetic force can be reduced, and the vibration noise of the motor can be reduced.

The utility model relates to the technical field of squirrel-cage rotors, and discloses a high-torque double-squirrel-cage rotor structure, which comprises a rotating shaft and a rotor iron core arranged on the rotating shaft, a lower cage assembly is arranged on the rotor iron core, and an upper cage assembly is arranged on the outer side of the lower cage assembly; the lower cage assembly comprises two lower end rings and a plurality of lower cage conducting bars mounted on the rotor core, the plurality of lower cage conducting bars are located between the two lower end rings, and the end parts of the lower cage conducting bars are connected with the surfaces of the lower end rings; the upper cage assembly comprises two upper end rings and a plurality of upper cage conducting bars installed on the rotor core, the plurality of upper cage conducting bars are located between the two upper end rings, and the end portions of the upper cage conducting bars are connected with the surfaces of the upper end rings. According to the high-torque double-squirrel-cage rotor structure, the lower cage assembly and the upper cage assembly are arranged, and the conductivity of the lower cage assembly and the conductivity of the upper cage assembly are combined, so that the loss and heating of the motor are reduced, and meanwhile, a torque curve is stable and accords with actual working conditions.

Electric motor with a squirrel-cage rotor in the form of a cage, which electrically carries several short-circuit end rings formed as castings made of a casting material, wherein at least one reinforcement element made of another material is cast into each of the castings, the casting material essentially forming the outermost free surface of the short-circuit end ring.

The utility model discloses a low-noise rotor of a small and micro energy-saving refrigeration motor, and relates to the technical field of motor rotors. Comprising a rotor core and a shaft connecting structure arranged in the rotor core, the shaft connecting structure comprises a main shaft piece, an auxiliary shaft piece, a plurality of connecting rods, a plurality of bolts, a limiting ring and a clamping and embedding ring, the sides, close to each other, of the main shaft piece and the auxiliary shaft piece are embedded in the rotor core, one ends of the connecting rods are fixedly arranged on the main shaft piece, and the other ends of the connecting rods are fixedly arranged on the clamping and embedding ring. And the other ends of the plurality of connecting rods are fixedly embedded in the auxiliary shaft piece through a plurality of bolts respectively. Through the main shaft piece, the auxiliary shaft piece, the connecting rod, the bolt and the limiting ring, the overall weight of the rotor can be effectively reduced, the operation efficiency of equipment can be improved, the lighter rotor can reduce the burden of a bearing and a driving system, the service life of the equipment is prolonged, meanwhile, the proper centrifugal force can ensure that the motor rotor keeps stable in the operation process, and the service life of the equipment is prolonged. And vibration and noise are reduced, so that the overall performance and reliability of equipment are improved.

An electric motor comprises: a stator; a rotor comprising: a rotor shaft having a hollow interior and configured for rotation inside the stator about a rotor axis, the rotor shaft having at least one inlet into the hollow interior and at least one radial outlet from the hollow interior; and a rotor body and an endring at an end of the rotor body along the rotor axis; and a spacer forming an internal cavity to receive fluid from the hollow interior, the spacer having an outlet from the internal cavity.

A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor disposed within the stator and comprising a core coupled to the first drive shaft, wherein the core retains a first permanent magnet element within a first magnet pocket defined by the core that extends axially parallel to the first drive shaft and retains a second permanent magnet element within a second magnet pocket defined by the core that extends axially parallel to the first drive shaft; a seal section having a second drive shaft coupled to the first drive shaft; and a pump assembly having a third drive shaft coupled to the second drive shaft.

The invention belongs to the technical field of motors, and discloses an explosion-proof three-phase asynchronous motor with a cooling structure, which comprises a motor shell and an output shaft arranged in the motor shell, the output shaft is externally connected with a rotor, the inner wall of the motor shell is connected with a stator coil matched with the rotor, and the outer wall of the motor shell is provided with an annular heat exchange groove. The upper end of the outer wall of the motor shell is provided with a liquid inlet groove. According to the explosion-proof three-phase asynchronous motor with the cooling structure, efficient heat exchange is achieved through the closed-loop liquid cooling channel design, the annular heat exchange grooves in the outer wall of the motor shell are communicated with the liquid inlet grooves and the liquid outlet grooves in the upper end and the lower end to form a complete cooling liquid circulation path, and the multiple heat exchange structures can ensure that heat is evenly transmitted and dissipated; the problem of local overheating caused by insufficient heat dissipation area of traditional natural heat dissipation is avoided, the heat management efficiency of the motor core component is remarkably improved, and the liquid cooling circulation channel is directly arranged in the motor shell, so that compared with a traditional external heat dissipation structure, the heat dissipation efficiency is high.