17 results about "Rotor cage" patented technology

The invention relates to the technical field of motor control, and discloses a bearingless composite rotor cage type asynchronous motor vibration real-time compensation control method, which comprises the following steps: acquiring and preprocessing a rotor displacement signal to obtain a filtered displacement signal; processing the filtered displacement signal based on a second-order generalized integrator, and extracting a fundamental frequency harmonic component synchronous with the mechanical angular velocity of the rotor; adopting a simplified LMS algorithm to dynamically optimize the amplitude weight and the phase weight of the compensation force, and generating a feedforward compensation force according to the optimized weights; a two-channel control framework is constructed, and total control force is synthesized; the suspension force winding is driven by the inverter to generate corresponding radial suspension force, so that unbalance vibration of the rotor is counteracted; according to the invention, the second-order generalized integrator harmonic observer is adopted to realize high-precision extraction of the fundamental frequency component, and the mechanical angular velocity change of the rotor can be tracked in real time in cooperation with a frequency adaptive adjustment mechanism.

The invention relates to a rotor (10) for an electric motor (2) comprising a rotor cage (11) with at least two short-circuit rings (12) and several rotor bars (13) connecting the short-circuit rings (12), and a rotor body (20) which is at least partially arranged within the rotor cage (11), wherein the rotor body (20) has a radial region (21) in which the rotor bars (13) extend, the radial region (21) having at least two annular sections (22), each associated with one of the short-circuit rings (12), and a central section (23) extending between the annular sections (22). The invention further relates to an electric motor (2) and a vehicle (1).

The application discloses a commutator and rotor holder automatic assembling equipment and method for a hollow cup motor rotor, which comprises a mounting seat, a motor, a cylinder, an adapter block, a first bearing, a sliding sleeve, a clamping jaw and a clamping jaw mounting rack, the adapter block is mounted on the output shaft of the cylinder, and the output shaft of the motor is connected with a vertically arranged rotating shaft; the sliding sleeve is mounted on the adapter block through the first bearing, and the sliding sleeve is movably sleeved on the rotating shaft; the clamping jaw mounting rack is fixedly penetrated on the rotating shaft; the clamping jaw comprises a pair of clamping fingers, each clamping finger is hingedly connected to the clamping jaw mounting rack through a horizontal hinge shaft, the sliding sleeve is respectively provided with a notch groove at a position corresponding to each clamping finger, and the upper end of each clamping finger is clamped into the notch groove. The application can clamp the commutator through the clamping jaw, then the rotating shaft drives the clamping jaw to rotate to align the commutator with the rotor holder, the subsequent pressing tool on the production line is facilitated to press the commutator into the rotor holder, and automatic assembly is realized.

The present invention discloses an experimental device for quantitative simulation of induction motor rotor faults. The device comprises an experimental bench, a rotor lead-out induction motor, and a control cabinet. In the lead-out induction motor, the rotor cage bars are fixed in the slots of the rotor core, and the two ends are respectively installed in the two end ring slots at the two ends. One end of the cage bars has a lead-out screw hole, in which a terminal is installed. Through the conductive and non-conductive nuts on the terminal that contact the end ring, the cage bars can be directly short-circuited or indirectly short-circuited at the end ring B. A number of cage bars can be led out through slip rings and connected to the control cabinet. The present invention fills the gap in a dedicated experimental device for simulating induction motor rotor faults, simplifies the broken bar simulation process, avoids rotor-to-ground short circuits caused by burrs generated by machining, realizes repeatable quantitative simulation of different broken bar fault conditions, and improves the convenience and scalability of induction motor rotor fault testing.

The application relates to the technical field of electric transmission and control, and discloses a bearing-free composite rotor cage asynchronous motor multi-frequency harmonic vibration compensation control method and system. The bearing-free composite rotor cage asynchronous motor multi-frequency harmonic vibration compensation control method comprises the following steps: collecting a bearing-free composite rotor cage asynchronous motor rotor radial displacement signal; constructing an input vector containing a direct current item and multi-order cosine and sine components; using an adaptive linear neuron algorithm to decompose the signal and extract direct current, a fundamental wave and each order harmonic component; using an extended linear active disturbance rejection controller to observe total disturbance containing low-frequency slow change and harmonic disturbance; calculating compensation force according to the harmonic component; superimposing the compensation force and basic suspension force to form a total control force instruction; driving a suspension winding through force-current conversion; and inhibiting multi-frequency harmonic vibration. The application effectively improves harmonic separation precision and disturbance suppression capacity, and provides a reliable theoretical guarantee for high-speed bearing-free motor control.

The present invention relates to the field of motor technology, and in particular to a device and method for testing the torsional vibration characteristics of a rotor cage end. The testing device includes two sets of clamping mechanisms, which are symmetrically distributed on the left and right and have a working area reserved therebetween. The clamping mechanism includes two clamping pieces symmetrically distributed front and back, the lower ends of the clamping pieces are fixed on a base plate, and the two clamping pieces are interspersed with a pair of adjusting bolts arranged front and back; an exciter; a clamping mechanism, located in the working area, including a connecting plate, which is parallel to the base plate and connected to the output end of the exciter, and a clamping piece suitable for clamping a guide bar is provided on the connecting plate; a force sensor; and an acceleration sensor. The testing device provided by the present invention can measure the torsional vibration characteristics of a single guide bar with two end rings, and then obtain the torsional vibration characteristics of the rotor cage end, thereby avoiding the use of an overall rotor test, reducing the test scale and test cost, and improving the test efficiency.

The utility model provides a motor with a rotor cage structure, and belongs to the technical field of motors. The rotor cage solves the problem that a rotor cage in the prior art is not easy to disassemble or assemble. The motor comprises a motor shell, a motor stator, a stator winding, a rotor cage and a motor rotor, the motor stator is installed inside the motor shell, the stator winding is installed inside the motor stator, the rotor cage comprises two cage body covers and a plurality of conducting bars, and the cage body covers are of a horizontally symmetrical structure. A plurality of rectangular plates in a circumferential array are formed on the cage body cover, the thickness of the end part of the inner side of each rectangular plate is greater than that of the end part of the outer side of each rectangular plate, a plurality of connecting columns are mounted on the cage body cover, the connecting columns and the rectangular plates are distributed at intervals, and the connecting columns penetrate through the cage body cover and are fixedly connected with one ends of the guide bars; and the conducting bars are connected with the rotor slots. The utility model has the advantage that the rotor cage is convenient to disassemble or assemble.

The application relates to the technical field of motor control and discloses a bearing-free composite rotor cage-type asynchronous motor vibration real-time compensation control method, which comprises the following steps: collecting a rotor displacement signal and pre-processing the same to obtain a filtered displacement signal; processing the filtered displacement signal based on a second-order generalized integrator to extract a fundamental harmonic component synchronized with a rotor mechanical angular velocity; dynamically optimizing the amplitude weight and the phase weight of a compensation force by adopting a simplified LMS algorithm, and generating a feedforward compensation force according to the optimized weight; constructing a double-channel control framework to synthesize a total control force; and generating corresponding radial suspension forces by driving a suspension force winding through an inverter, so that the unbalanced vibration of the rotor is counteracted; the second-order generalized integrator harmonic observer is adopted to realize high-precision extraction of the fundamental frequency component, and a frequency self-adaptive adjustment mechanism is matched, so that the rotor mechanical angular velocity change can be tracked in real time.

Electric motor (50) with an electromagnetically actuated brake, wherein the electric motor (50) comprises a housing, a rotor (1) and a stator (16), wherein the rotor (1) comprises a shaft, a rotor lamination stack and a rotor casting designed as a rotor cage, wherein the shaft (66) is supported in the housing by a fixed bearing (11) and a floating bearing (44), wherein the floating bearing (44) is arranged to be axially movable and the shaft (66) has shaft sections with different diameters, whereby the transitions of the shaft sections form shaft diameter steps, wherein a spring element is arranged axially between the floating bearing (44) and a housing part, namely a bearing shield (42), wherein at least one ring of the floating bearing (44) is pressed against a shaft diameter step by the spring element, wherein the spring element is designed as a disc spring.wherein the brake (550) comprises a magnetic body and a coil mounted in the magnetic body, and a brake control line is provided for controlling the coil, and the brake control line is detachably connected to a coil connection in the magnetic body by means of a brake connector, wherein the brake connector and the coil connection are designed as electrical plug connections, wherein the brake connector has a connector part and the coil connection has a corresponding mating connector part, wherein the connector part is electrically connected by means of the brake control line to a connection option in the terminal box (110) in order to electrically connect the brake control line to an external control electronics or to control electronics located in the terminal box (110), and the mating connector part is electrically connected to the coil.wherein the brake connection line is guided through an eyelet of a bearing shield (42) of the electric motor (50), wherein the brake connection line is strain-relieved by means of a screw connection in the eyelet, wherein the brake (550) comprises a brake pad (169) arranged in a lining area and a tubular brake housing part, wherein the tubular brake housing part has a smaller inner diameter than an outer diameter of the magnet body and the tubular brake housing part is made of an elastic material such that it can be slipped over the magnet body and the tubular brake housing part surrounds the lining area in a housing-forming manner, wherein the tubular brake housing part is made of an elastic material, namely rubber or silicone, which conducts heat less effectively than metal or stainless steel, wherein the brake (550) has a brake pad (169) connected to a shaft (66) of the electric motor (50) in a rotationally fixed manner.The brake pad carrier (168) comprising the brake pad (169) and an armature disk (149) which is fixed against rotation relative to a housing of the electric motor (50), wherein the armature disk (149) and the brake pad carrier (168) are arranged to be axially movable in the pad area, wherein the brake pad carrier (168) comprises two metal disks, namely made of aluminum, which are connected to each other by a damping material and the brake pad (169) is arranged on the metal disks.

The invention relates to an asynchronous motor rotor squirrel cage fault diagnosis method and system fused with an electrical mechanism model and a medium, and the method comprises the steps: collecting the three-phase stator voltage, the three-phase stator current and the operation rotating speed of a to-be-monitored asynchronous motor, carrying out the preprocessing of the three-phase stator voltage, the three-phase stator current and the operation rotating speed, establishing a vibration fault characteristic frequency set; calculating vibration fault characteristic predicted values corresponding to all frequency points in the vibration fault characteristic frequency set by adopting a preset strategy, wherein the vibration fault characteristic predicted values comprise vibration displacement predicted values of the measuring points at the frequency points in the characteristic frequency set and vibration base values generated by the main magnetic flux of the motor; and calculating a prediction waveform coefficient of the squirrel cage fault according to the vibration displacement prediction value and the vibration base value, constructing a fault feature vector, comparing the fault feature vector with a preset fault region, and determining whether the motor has a fault according to a comparison result. According to the invention, the accuracy and robustness of motor fault diagnosis are improved.

An induction motor (1) comprising: a squirrel cage rotor (5) comprising: a rotor core (9) having a first axial end (9a) and a second axial end (9b), and a plurality of axial rotor slots (9c) extending from the first axial end (9a) to the second axial end (9b), a rotor cage comprising: a plurality of rotor bars arranged in a respective rotor slot (9c), each rotor bar being composed of at least one elongated metal element extending along the respective rotor slot (9c) and cast metal filling up space around all the metal elements in the rotor slot (9c), wherein at each of the first axial end (9a) and the second axial end 0 (9b) of the rotor core (5), the metal elements have connecting portions, each connecting portion extending between two rotor slots (9c) and directly electrically connecting two metal elements arranged in different rotor slots (9c), the connecting portions being arranged such that every metal element in every rotor slot (9c) is directly electrically connected to a metal element in another rotor slot (9c) via a connecting portion at each of the first axial end (9a) and the second axial end (9b), and such that at each of the first axial end (9a) and the second axial end (9b), a connecting portion extends along an end surface of the first axial end (9a) and the second axial end (9b), respectively, between every pair of adjacent rotor slots (9c).

The invention relates to the technical field of electrical transmission and control, and discloses a multi-frequency harmonic vibration compensation control method for a bearingless composite rotor cage type asynchronous motor, and the multi-frequency harmonic vibration compensation control method for the bearingless composite rotor cage type asynchronous motor comprises the steps: collecting a rotor radial displacement signal of the bearingless composite rotor cage type asynchronous motor; constructing an input vector containing a direct current item and multi-order cosine and sine components, decomposing a signal by using an adaptive linear neuron algorithm, and extracting direct current, fundamental waves and harmonic components of each order; total disturbance containing low-frequency slow change and harmonic disturbance is observed through an extended linear active disturbance rejection controller, compensation force is calculated according to harmonic components, the compensation force and basic suspension force are superposed to form a total control force instruction, a suspension winding is driven through force-current conversion, and multi-frequency harmonic vibration is restrained; according to the method, the harmonic separation precision and the disturbance suppression capability are effectively improved, and a reliable theoretical guarantee is provided for high-speed bearingless motor control.

A rotor cage (12, figure 1) suitable for an induction motor (180, figure 7), the cage comprising two end rings 18 connected by bars 20 and a rotor core (16, figure 1) comprising a stack of laminations

An extruder-mixer has a stator and a rotor which is arranged coaxially with respect to the stator. The rotor is rotatably supported with respect to the stator. The stator is at least partially arranged inside a volume defined by the rotor. The rotor has a rotor cage having a large number of apertures. The apertures are configured to be elongate in a longitudinal direction and the longitudinal direction thereof extends in each case in a skewed manner with respect to a rotation axis of the rotor.

The application relates to the technical field of motor fault-tolerant detection and control, and discloses a bearingless composite rotor cage asynchronous motor fault-tolerant detection and control method, which comprises the following steps: introducing a dynamic kernel width optimized adaptive generalized regression neural network, so that the accuracy and reliability of displacement sensor fault detection are improved. The AGRNN model can adapt to the unevenness of sample distribution, improve the fitting capacity of a nonlinear system, and make the displacement estimation error decrease to a certain extent; the designed four-sensor annular redundant configuration supports displacement reconstruction under the condition of double-sensor fault, significantly improves the fault-tolerant capacity of the system, and enables the bearingless composite rotor cage asynchronous motor to keep stable operation under more severe conditions; the proposed multi-scale anti-interference filtering technology can effectively suppress high-frequency interference, improve the quality of the displacement signal, and improve the anti-interference capacity of the system in a complex industrial environment.

The application relates to an asynchronous motor rotor cage fault diagnosis method and system based on a fusion electrical mechanism model, and a medium, the method comprising: collecting three-phase stator voltage, three-phase stator current and running speed of an asynchronous motor to be monitored; preprocessing the three-phase stator voltage, three-phase stator current and running speed; and establishing a vibration fault characteristic frequency set; using a preset strategy to calculate vibration fault characteristic prediction values corresponding to all frequency points in the vibration fault characteristic frequency set, wherein the vibration fault characteristic prediction values comprise vibration displacement prediction values of a measuring point at each frequency point in the characteristic frequency set, and a vibration base value generated by motor main magnetic flux; calculating a predicted waveform coefficient of the cage fault according to the vibration displacement prediction values and the vibration base value; constructing a fault characteristic vector; comparing the fault characteristic vector with a preset fault region; and determining whether the motor has a fault according to a comparison result. The application improves the accuracy and robustness of motor fault diagnosis.

This invention discloses a robot joint with an output encoder and a control method. The invention integrates a synchronous motor, a planetary gearbox, and an output encoder housed in a casing to form a robot joint. Simultaneously, the motor-end encoder magnet is fixed to the outer rotor cage, allowing the motor controller to measure the angular displacement of the outer rotor cage. The output encoder magnet is fixed to the encoder output gear, allowing the output encoder circuit board to measure the angular displacement of the output flange. When the synchronous motor starts, the relative position of the output flange relative to its zero position is obtained. Even after a power outage and restart, the relative position of the output flange is not lost, thus achieving zero-position maintenance even after power failure. Therefore, there is no need to continuously supply power to the motor controller of the onboard encoder, nor is it necessary to manually return the motor to its zero position after each power outage and restart, greatly reducing the module size and simplifying operation.