161 results about "Induction machine" 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 discloses a constant-speed and variable-speed induction motor acoustic fault diagnosis method based on a Transform-SE attention mechanism and a convolutional neural network, and belongs to the field of sound signal processing. And the data is converted into a two-dimensional time-frequency graph through short-time Fourier transform so as to construct a data set. Then, the data set is used for training a hybrid diagnosis model which is jointly constructed by a convolutional neural network, a Transform module based on Patch and an SE module; the CNN is used for extracting local time-frequency features, the Transform module captures a cross-regional global dependency relationship, and the SE module adaptively enhances key channel features. According to the method, local details and global context information can be effectively fused, and stable and high-precision identification of various motor faults is realized under complex working conditions including constant speed, variable speed, no-load and full load.

This invention discloses a stator assembly, a motor, a compressor, and a refrigeration device, relating to the field of induction motor technology. The stator assembly includes a stator core and stator windings. The stator core has Q stator slots, which are divided into large slots and small slots according to their cross-sectional area. The stator windings include concentrically wound main windings and auxiliary windings. The main windings have m coils, and the auxiliary windings have n coils. The main windings are numbered B1, B2, B3...B according to their winding span from largest to smallest. m The secondary windings are numbered A1, A2, A3, ... A, according to their winding span from largest to smallest. n ;B2 to B m In the stator slots where the coils are located, there is at least one single main winding slot, and each single main winding slot contains only the main winding. At least one of the single main winding slots is a minor slot; 16≦Q≦32, 3≦m≦14, 3≦n≦12. The technical solution provided by this invention is used to reduce the harmonic ratio of the motor, thereby reducing motor heat generation and improving motor efficiency.

The utility model discloses a rotary induction magnet structure for a coded disc of a brake controller, which is connected to the coded disc of the brake controller and comprises a motor, and a main shaft of the motor is connected to the center of the coded disc of the brake controller through a bearing; a magnet is embedded and fixed at the end part of a spindle of the motor; an inductive probe is arranged in a shell of the motor; a signal wire connected with the inductive probe is arranged in a shell of the motor, and the end part of the signal wire is connected with a plugging terminal in a plugging manner; the motor rotates to drive the magnet to rotate, the induction probe inducts the number of rotation turns of the magnet and transmits induction signals to the motor control circuit board, and the motor control circuit board controls the motor to rotate reversely and reset. According to the utility model, the structure arrangement is reasonable, the magnet is embedded at the end part of the main shaft of the motor and is matched with the inductive probe in the shell of the motor to induce the number of rotation turns of the main shaft of the motor, and the motor is enabled to reversely rotate corresponding turns for resetting through the motor control circuit board, so that the effectiveness and stability of resetting are ensured, and the brake effectiveness and smoothness are improved.

Embodiments of the present disclosure relate to soft turn-off for motor controllers. A bidirectional switch for an induction motor is described. The bidirectional switch can include a first power semiconductor transistor having a first source, a first drain, and a first gate. The bidirectional switch can also include a second power semiconductor transistor having a second source, a second drain, and a second gate. The bidirectional switch can include the second source connected to the first source. The bidirectional switch can include a soft start device including a control circuit configurable to provide a first control signal to the first power semiconductor transistor and a second control signal to the second power semiconductor transistor.

The invention relates to cooking fume treatment equipment, in particular to a cooking fume purification device which comprises a fume collecting pipeline, an impeller, a driving mechanism and a radial magnetic suspension bearing, and a fume exhaust channel communicated with the outside is formed in the fume collecting pipeline; the impeller is positioned in the smoke exhaust channel; the driving mechanism comprises a rotating shaft and a magnetic bearing motor, the rotating shaft is connected with the impeller, and the bearing motor is arranged in the smoke collecting pipeline and arranged on the peripheral side of the rotating shaft in a sleeving mode to drive the rotating shaft to rotate along the axis of the rotating shaft. The radial magnetic suspension bearing is arranged in the smoke collecting pipeline and arranged on the peripheral side of the rotating shaft in a sleeving mode, the radial magnetic suspension bearing can support the rotating shaft to be located at the axis position of the bearing motor through magnetic force, and compared with a traditional induction motor, the problem of noise generated by friction is avoided to a certain degree; and the friction loss is avoided, so that the efficiency of the motor is further improved.

The present application relates to dough fermentation equipment technical field, and disclose a kind of temperature and humidity precision regulation and fermentation PLC control equipment, including fermentation tank assembly, the bottom of fermentation tank assembly is fixedly installed with humidification assembly, and fermentation tank assembly is also equipped with placing assembly, and fermentation tank assembly includes PLC controller, and humidification assembly includes atomizing piece, and PLC controller controls and drives atomizing piece to humidify the internal environment of fermentation tank assembly, and placing assembly includes end rod, the height of end rod is adjustable, and end rod array is placed with dough, after dough fermentation is completed, PLC controller controls to close atomizing piece and stop humidification, and fermentation tank assembly includes front tank plate, and the upper side of front tank plate is movably installed with tank door, and the bottom of tank door is equipped with front air induction machine, and the rear side of front air induction machine is installed with front filter layer, the equipment can automatically reduce the humidity and temperature of fermentation environment after dough fermentation is completed, reduce yeast activity, to prevent dough excessive fermentation.

The utility model discloses a multifunctional hand-washing cleaner which comprises a wall and a hand-washing cabinet body, the hand-washing cabinet body is arranged on one side of the wall, a hand-washing basin is arranged in the hand-washing cabinet body, two cabinet doors are arranged on one side of the hand-washing cabinet body, a collecting box is arranged in the hand-washing cabinet body, and a storage bottle is arranged in the collecting box. A storage bottle is arranged in the collecting box, an induction motor is arranged at the top of the storage bottle, a water outlet induction motor box is arranged in the collecting box, and an angle valve switch is arranged on one side of the water outlet induction motor box. An infrared sensor is arranged in the induction motor, hand sanitizer is stored in the storage bottle, tap water flows out downwards through the tap water outlet, the circular pocket is embedded into the water leakage hole, external sundries can be blocked through the leakage net, and the multi-functionalization of the hand washing cleaner is achieved through the structure.

What is provided is a variable flux motor being a synchronous or induction motor, including: a stator; and a rotor, in which the stator includes: a stator core; and a winding wound around the stator core, and at least a part of the stator includes a non-linear soft magnetic material.

A rotor assembly is configured to rotate relative to a stator to drive a rotor shaft and at least one drive wheel of an electric vehicle. The rotor assembly includes a rotor core, and first and second bar assemblies. The rotor core includes a core body that defines a plurality of circumferentially arranged bar passages including a plurality of first bar passages and a plurality of second bar passages. The first bar assembly includes a plurality of first bars, each of the first bars having a first elongated blade portion and a first end body portion. The second bar assembly includes a plurality of second bars, each of the second bars having a second elongated blade portion and a second end body portion. the first bars and the second bars are alternately received at the respective plurality of first bar passages and second bar passages in the core body.

The application discloses a magnetic induction motor, comprising: a chip combination body provided with a wire frame coil; a fixed support; a lever penetrating through a movable cavity and extending to the inside of the fixed support, one end of the bottom of the lever being provided with a movable block; a first steel plate arranged at the bottom of the movable block, the front side and the back side of the first steel plate being provided with a second steel plate; springs arranged at the two sides of the movable block and on the top of the first steel plate; and a magnetic block. The application cancels the counterweight block and the connecting rod assembly in the existing structure, adopts a transmission structure in which the lever is directly connected with the movable block, greatly simplifies the overall structure of the motor, reduces the number of parts and the assembly process, effectively reduces the production cost and the operation energy consumption of the product, simultaneously relieves the working heat problem of the wire frame coil, prolongs the overall service life of the motor, effectively eliminates the working noise generated by the collision and resonance of the parts, and realizes the stable operation of the motor with low vibration and low noise.

System and method for sensorless control of an induction motor are disclosed. A flux observer estimates a rotor flux based on stator voltage and current measurement. A low frequency signal injection module generates a flux estimation error signal at low motor speed, while a baseline observer generates a model based flux estimation error signal at medium to high motor speed. A switching mechanism selects between these error signal based on motor condition. A proportional integral regulator and integrator process the selected error signal to estimate rotor speed. A lead compensator adjusts phase during transitions to ensure stability, with a switching signal generator activating the LFSI module when stator frequency falls below a predefined threshold. This control system provides rotor flux and speed estimation across a full range of motor speed by adaptively switching between observers based on operating conditions.

Disclosed are a method for controlling an induction motor, a device, an equipment and a storage medium. The method includes: determining an optimal starting frequency by acquiring initial equivalent circuit parameters of the induction motor at zero speed, and determining a starting voltage by a preset starting current, so as to enable the induction motor to enter a starting operation phase; then determining that the induction motor switches from the starting operation phase to the steady operation phase when it is determined that the motor starting speed of the induction motor in the starting operation phase is accelerated to be consistent with a preset steady operation speed; and using the optimal frequency with the updated equivalent parameters identified with the operation current and voltage values, and adjusting the drive voltage to maintain the motor speed to the required one.

This utility model relates to the field of three-phase induction motors, and more particularly to a heat dissipation assembly for a three-phase induction motor. It includes a connecting base, a motor body mounted on its upper end, a junction box mounted on the upper surface of the motor body, and a drive shaft mounted on the output end of the motor body. A heat dissipation structure is provided on the side of the connecting base away from the drive shaft. The heat dissipation structure includes a connecting ring, which is fixedly connected to the motor body. The inner wall of the connecting ring has several holes. A housing is slidably connected to the arc surface of the connecting ring. Several connecting rods are fixedly connected to the inner wall of the housing, and the connecting rods are slidably connected to the holes. The heat dissipation assembly for a three-phase induction motor provided by this utility model has the advantages of easily improving the heat dissipation efficiency inside the motor, not only improving the motor's heat dissipation efficiency but also reducing the motor's aging rate.

The invention belongs to the technical field of motors, and provides a solid rotor structure and an induction motor, the solid rotor structure comprises a rotating shaft and a rotor connected to the rotating shaft, the rotor is a conductive magnetizer, the rotor is provided with two spaced or connected slot groups along the axial direction, the slot groups comprise at least two spaced or connected slot groups, and the slot groups are arranged on the rotating shaft. The groove group comprises a plurality of grooves which are distributed along the axial direction of the rotor at equal intervals; in each groove group, the adjacent groove groups are staggered by a first angle along the first rotation direction of the rotor; and in the middle of the rotor, two adjacent groove groups which are respectively positioned in different groove groups are staggered by a second angle along the first rotating direction of the rotor.

A machine tool control device according to one aspect of the present invention, with which a machine tool driving a main shaft by means of an induction motor is controlled according to a machining program, is equipped with: a load estimation unit which, by pre-calling the machining program, estimates whether the load state of the main shaft is idling operation without any load induced by the machining or actual operation including a load induced by the machining; and a current control unit which controls a d-axis current and a q-axis current of the main shaft currents supplied to the induction motor such that the speed of the main shaft corresponds to a speed according to the machining program, and which sets the d-axis current to a higher value when the load state is estimated to be actual operation than when the load state is estimated to be idling operation.

The invention provides a double-winding induction motor power generation system output voltage balance control method and system, aims to solve the problems of low output voltage balance degree and the like caused by uncertain and asymmetrical load disturbance of an aircraft variable-frequency alternating-current power generation system, and belongs to the technical field of variable-frequency alternating-current power generation. According to the invention, active suppression of the imbalance of the output voltage is realized, and the power supply quality is improved. The method can estimate and compensate the unbalanced voltage of the power winding side in real time, thereby effectively suppressing the unbalance degree of the output voltage, ensuring the symmetry and stability of the three-phase voltage, improving the electric energy quality of a double-winding induction motor power generation system, decomposing the three-phase asymmetric voltage into a positive sequence component and a negative sequence component, and improving the reliability of the double-winding induction motor power generation system. The negative sequence component in the power winding side voltage is accurately separated in real time through the orthogonal signal acquirer, and the unbalance degree of the voltage is judged according to the magnitude of the negative sequence voltage. The power supply can be applied to independent power supply application occasions such as airplanes and ships, and is high in universality.

The utility model relates to the technical field of elevator maintenance, and discloses a landing door locking structure for elevator maintenance, which comprises a first elevator door plate, a sliding rail and a lock catch assembly, a second elevator door plate is arranged on the right side of the first elevator door plate, and an induction motor is arranged on the front side of the first elevator door plate. A triangular key button is arranged on the back of the second elevator door plate, the lock catch assembly is arranged on the front face of the second elevator door plate, and a sliding rail is fixedly connected to the front face of the second elevator door plate. The first elevator door plate and the second elevator door plate are combined through sliding of the sliding supporting blocks outside the sliding rails, the lock hooks are pushed by the arranged first springs to be clamped into the limiting hanging sleeves for locking, loosening of a tightly-matched structure is avoided, it is guaranteed that the landing door can be firmly locked after being closed, and the safety of a user is protected; the situation that the position of the contact switch deviates or the state of the lock hook cannot be accurately detected is avoided, and it is guaranteed that normal starting and running of an elevator are not affected.

Systems and methods for enhanced techniques for analyzing induction motors. An example method includes accessing circuit model information associated with an induction motor (IM), the circuit model information representing rotor bars of the IM as each including respective rotor segments. Rotor segment nominal currents associated with the rotor segments are determined, with the determination being based on performing finite element analysis (FEA) over a grid and use of a linearized circuit model. Rotor segment ripple currents associated with the rotor segments are determined, with the determination being based on performance of FEA to extract flux ripple samples over the grid, with the flux ripple samples being transformed into a time-varying rotor flux ripple signal, and with the rotor segment ripple currents being determined based on the time-varying rotor flux ripple signal. Losses associated with the IM are determined.

The electromagnetic induction type wind power generation device comprises a supporting seat and a fixing frame, a barrel cover is rotationally connected to the middle of the upper surface of the supporting seat, a wind power mechanism is rotationally connected to the middle of the fixing frame, an adjusting mechanism is rotationally connected to the position, close to the edge, of the front side of the upper surface of the supporting seat, and lifting mechanisms are arranged at the four corners of the lower surface of the supporting seat; the wind power mechanism comprises an induction motor, the induction motor is installed on the lower surface of the interior of the barrel cover, the output end of the induction motor is fixedly connected with the bottom of a main shaft, a through rod is installed in the main shaft, and the through rod penetrates through the middle of the fixing frame and is fixedly connected with the middle of a first worm wheel. Kinetic energy of wind is converted into kinetic energy on the wing-shaped surface wind wheels on the two sides, rotation of the wing-shaped surface wind wheels on the two sides is limited by the third worm wheel along with the fourth worm wheel and only rotates on the third worm wheel, and therefore it can be guaranteed that wind blows the wing-shaped surface wind wheels on the two sides to generate continuous torque for the first worm wheel, and more wind force is borne.

The utility model relates to a tail gas treatment device, which belongs to the technical field of tail gas treatment and comprises a first-stage filter, a second-stage filter, an electrostatic purifier, a third-stage filter and an induced draft fan which are sequentially connected through pipelines. The primary filter adopts a coarse filter screen to filter fiber powder; the secondary filter adopts a dry type filtering mode and is used for filtering solid particles and impurities in the tail gas; the electrostatic purifier realizes dust removal and oil removal by generating a higher electrostatic field; the third-stage filter adopts activated carbon filtration and is used for treating fine particles and peculiar smell which are not treated by the electrostatic purifier; the induced draft fan is used for driving tail gas to flow, so that the tail gas sequentially passes through the first-stage filter, the second-stage filter, the electrostatic purifier and the third-stage filter; according to the tail gas treatment device disclosed by the utility model, the service life of the whole tail gas treatment device is prolonged by automatically switching the coarse filter screen, and the tail gas treatment efficiency is improved.

The invention discloses a composite active-disturbance-rejection control method of a grid-connected inverter system based on a duplex-winding induction motor, and belongs to the technical field of motor control. Aiming at the control problems of multivariate, strong coupling and complex disturbance of the duplex-winding induction motor, the method comprises the following steps: firstly, listing a state equation of the duplex-winding induction motor; furthermore, a composite extended state observer is designed, a proportional element and a quasi-resonance controller are introduced into the observer on the basis of a traditional structure, and aperiodic disturbance and periodic disturbance with specific frequency can be estimated at the same time with high precision. According to the invention, the inhibition capability of the system on various disturbances is effectively improved, and the dynamic response speed and the steady-state control precision of the double-winding induction motor driving system are obviously improved.

This application discloses a method, apparatus, electronic device, computer-readable storage medium, and computer program product for induction motor fault identification. The method includes the following steps: acquiring infrared thermal images of the induction motor under multiple operating conditions; preprocessing the acquired infrared thermal images to obtain real samples; and constructing a diffusion generation model jointly constrained by component region conditions and fault state conditions. The component region conditions characterize the component region category to which the infrared thermal image was acquired, and the fault state conditions characterize the fault state category of the induction motor when the infrared thermal image was acquired. This ensures consistency between the component region conditions and the fault state conditions between the real samples and the diffusion-enhanced samples, increases the number of enhanced samples consistent with the real thermal mechanism, and avoids affecting the model's generalization ability.

The invention provides a rotating motor multi-type load simulation device and method based on sliding mode control. According to the invention, a sliding mode control algorithm is adopted, and after the state reaches a sliding mode surface, a'sliding mode 'motion which is not influenced by parameter disturbance and external interference is entered, so that rapid and overshoot-free tracking of the target torque is realized. According to the invention, high-precision dynamic simulation can be carried out on various typical load characteristics such as constant torque, constant power, fan pumps and the like, the simulation precision is high, the adaptability is high, and the load simulation requirements under complex working conditions are met. The device provided by the invention is clear in structure and clear in method flow, is suitable for load simulation of a direct current motor, can be conveniently expanded to various rotating motors such as an alternating current permanent magnet synchronous motor and an induction motor by adjusting a motor model, and has wide engineering application and teaching values.

The present application belongs to the technical field of motor drive control, and particularly relates to an induction motor stator and rotor resistance estimation method and system based on a hybrid model. By real-time acquisition of stator voltage and stator current, a stator voltage equation is constructed, a corrected stator flux linkage is obtained, and a rotor flux linkage reference value is calculated, thereby providing a reference for subsequent model optimization. By constructing a hybrid model architecture of a rotor flux linkage adjustable model and a stator current adjustable model, and introducing a multi-modal attention mechanism to dynamically adjust model parameters, the adaptability and estimation accuracy of the model are improved, thereby enabling high-precision back-propagation estimation of rotor resistance and stator resistance, effectively improving the performance and reliability of the induction motor control system, and providing support for stable operation and accurate control of the induction motor.

The present application relates to the technical field of motor control, and particularly relates to a motor driving method and system for suppressing current fluctuation, which comprises the following steps: receiving a frequency instruction, and generating a forced rotation angle and an instruction input voltage corresponding to the frequency instruction according to a preset V / f relationship; collecting two-phase stator phase currents on the output side of an inverter driving system, and performing synchronous rotation coordinate transformation on the two-phase stator phase currents with the forced rotation angle as a transformation angle to obtain a d-axis feedback current; comparing the d-axis feedback current with a preset d-axis current reference value to obtain a current deviation, and inputting the current deviation into a proportional integral regulator to output a d-axis voltage instruction; determining a q-axis voltage instruction according to the instruction input voltage and the d-axis voltage instruction, so that the amplitude of a voltage vector obtained by combining the d-axis voltage instruction and the q-axis voltage instruction is equal to the amplitude of the instruction input voltage; performing synchronous rotation coordinate inverse transformation on the d-axis voltage instruction and the q-axis voltage instruction with the forced rotation angle as a transformation angle to obtain a three-phase voltage instruction; generating a switching driving signal of the inverter driving system according to the three-phase voltage instruction, and using the switching driving signal to control the inverter driving system to output a three-phase driving voltage to an induction motor. The present application aims to solve the problems that the existing open-loop V / f control of the induction motor is prone to current fluctuation, torque pulsation and decline in running stability, and the existing suppression scheme is greatly dependent on motor parameters, has a complex algorithm and a high implementation cost.

The application discloses a parameter determination method and device of an induction motor and electronic equipment. The method comprises the following steps: when the motor is not connected with a load, the excitation current of the motor is controlled to be the rated current of the motor; the target inflection point speed of the motor is determined according to the actual current of the motor at multiple different set speeds; the target speed of the motor is controlled to be the target inflection point speed, the excitation current of the motor is controlled to be the rated current, and the motor is controlled to operate at the target speed; the excitation current of the motor is gradually increased until the voltage of the motor is saturated, and the excitation current corresponding to the time when the motor reaches the voltage saturation is taken as the maximum excitation current of the motor; the target speed of the motor is controlled to be the target inflection point speed, the motor is controlled to operate at the target speed, the excitation current of the motor is gradually decreased, and the minimum excitation current of the motor is determined according to the excitation current corresponding to the time when the actual current of the motor remains unchanged. The technical scheme of the application improves the accuracy and applicability of the parameter determination of the induction motor.

The invention discloses an induction motor turn-to-turn short circuit fault real-time monitoring and diagnosis method fusing physical and virtual data, belongs to the technical field of motor fault diagnosis and intelligent monitoring, and realizes high-precision simulation of current and temperature characteristics of a motor in normal and fault states by constructing an electromagnetic-thermal coupling digital twinborn model; a gradient descent method is adopted for online updating of model parameters, and it is ensured that the model is dynamically matched with a physical entity; virtual data of multiple working conditions and multiple fault degrees are generated through digital twinning, a physical-virtual fusion data set is constructed in combination with measured data, and the problem of small samples is solved; a deep residual shrinkage network (DRSN) is designed, fault classification is realized by combining current harmonic characteristics and temperature gradient characteristics, and the fault is deployed on edge equipment through lightweight optimization; according to the invention, early real-time monitoring and accurate diagnosis of the turn-to-turn short circuit fault of the induction motor can be effectively realized, the operation and maintenance cost is reduced, and the system reliability is improved.

A method for extracting parameters of an induction motor includes driving the induction motor by controlling an inverter based on current commands, measuring the torque of the induction motor and the reactive power of the inverter according to the driving of the induction motor, estimating stator flux values ​​of the induction motor based on the measured torque and reactive power, and extracting the parameters of the induction motor based on the stator flux values.